From 17836df54df77a51e47120c775cd7e722862c3e0 Mon Sep 17 00:00:00 2001 From: ethan Date: Tue, 24 Mar 2026 15:49:11 +0800 Subject: [PATCH] Record: int5 GPTQ + Soft-Round QAT + 33.6M model (3-seed mean val_bpb=1.1162) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit int5 GPTQ quantization with Hessian-aware error compensation enables 33.6M params in 16MB. Soft-Round QAT (differentiable tanh rounding, alpha 1→16) replaces STE for better training quality at zero cost. 3-seed results: - Seed 1337: val_bpb=1.1155, artifact=15.82MB - Seed 42: val_bpb=1.1163, artifact=15.42MB - Seed 7: val_bpb=1.1167, artifact=15.37MB - Mean: 1.1162 (std 0.0006) --- .../README.md | 75 + .../submission.json | 22 + .../train_gpt.py | 2273 +++++++++++++++++ .../train_seed1337.log | 172 ++ .../train_seed42.log | 172 ++ .../train_seed7.log | 172 ++ 6 files changed, 2886 insertions(+) create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/README.md create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/submission.json create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_gpt.py create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed1337.log create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed42.log create mode 100644 records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed7.log diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/README.md b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/README.md new file mode 100644 index 0000000000..fc738e0a9a --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/README.md @@ -0,0 +1,75 @@ +# Record: int5 GPTQ + 33.6M model + Soft-Round QAT + Legal Score-First TTT + +## Summary + +**3-seed mean val_bpb = 1.1162 (std 0.0006)** + +int5 GPTQ quantization (values in [-15, 15], 31 unique levels) with Hessian-aware error compensation enables a 33.6M parameter model to fit under 16MB. Soft-Round QAT replaces STE hard rounding with differentiable tanh-based rounding (alpha annealing 1→16) for better training quality at zero cost. Combined with early QAT at threshold 0.5, EMA 0.997, and legal score-first AdamW TTT with cosine LR decay across chunks. + +## Key Innovations + +1. **int5 quantization** — 31 unique values ([-15,15]) stored as int8, ~0.46 bytes/param after zstd. Lower entropy = better compression ratio than int6. +2. **GPTQ error compensation** — Hessian-aware column reordering + Cholesky error redistribution. 256-sample calibration on training data. +3. **33.6M param model** — MHA 8/8 (full attention), BigramHash 8192, MLP 3.5x (1792), enabled by int5 compression. +4. **Soft-Round QAT** — Differentiable rounding `s_α(y) = floor(y) + 0.5 * tanh(α·r) / tanh(α/2) + 0.5` replaces STE. Alpha anneals from 1→16 during QAT steps. Better gradient flow = better training quality at zero computational cost. +5. **Early QAT 0.5** — QAT clipping matched to int5 range (0.9995 percentile / 15.0), ~1750 QAT steps. +6. **EMA 0.997** — Exponential moving average of weights, tuned from 0.9985. +7. **Legal score-first TTT** — every token scored BEFORE any gradient update using it. Cosine LR decay across chunks. + +## Architecture + +- 11 layers, model_dim=512, 8 heads / 8 KV heads (MHA), MLP 3.5x relu² +- XSA on all 11 layers +- Partial RoPE 16/64, LN Scale (1/√(layer+1)) +- SmearGate + OrthoInit +- BigramHash 8192, Shared VE128 (layers 9,10) +- Tight SWA (every 50) + EMA 0.997 +- Muon lr=0.025, WD=0.04 +- FA3 Hopper, ~98ms/step → ~6120 steps in 600s +- **33.6M params**, int5 GPTQ + zstd-22, 2% magnitude pruning + +## Quantization Pipeline + +1. **Early QAT** (threshold 0.5): QAT-aware training with int5 clipping (scale = row_clip / 15.0, clamp [-16, 15]) +2. **GPTQ** (post-training): 256-sample Hessian calibration, per-row optimal scales (5-percentile search), column reordering by Hessian diagonal, block-128 Cholesky error compensation +3. **int5 quantization** (range [-15, 15], 31 levels) stored as int8 +4. **zstd-22** compression +5. **2% magnitude pruning** + +## Legal Score-First TTT + +- Val data split into 131072-token chunks (474 chunks) +- For each chunk: **score first** (sliding window stride=32, inference_mode), **then** adapt +- AdamW (lr=0.0001, wd=0.0), 3 epochs per chunk, cosine LR across chunks +- Last 2 blocks + norms + lm_head unfrozen (~5.8M / 33.6M params) +- Last chunk never trained on +- Every token scored BEFORE any gradient update using it +- Manual grad all_reduce (no DDP wrapper) + +## Results + +| Seed | TTT BPB | Artifact | +|------|---------|----------| +| 1337 | **1.1155** | 15,822,078 bytes | +| 42 | **1.1163** | 15,415,405 bytes | +| 7 | **1.1167** | 15,368,627 bytes | +| **Mean** | **1.1162** | | +| **Std** | **0.0006** | | + +## Reproduction + +```bash +# On 8xH100 SXM: +pip install --break-system-packages zstandard +# Build FA3 Hopper (see repo README for instructions) +python3 data/cached_challenge_fineweb.py --variant sp1024 --train-shards 80 + +SEED=1337 SKIP_SLIDING=1 PRUNE_PCT=0.02 \ +SOFT_ROUND_QAT=1 \ +TTT_EPOCHS=3 TTT_LR=0.0001 TTT_OPTIMIZER=adamw \ +TTT_FREEZE_BLOCKS=2 TTT_CHUNK_TOKENS=131072 \ +TTT_TEMPERATURE=0.98 INT6_LAST_N=0 \ +PPM_ALPHA=1.0 BYTE_WEIGHTED_TTT=0 USE_CACHE=0 \ +ADAPTIVE_LR=0 USE_MIXER=0 \ +torchrun --standalone --nproc_per_node=8 train_gpt.py +``` diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/submission.json b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/submission.json new file mode 100644 index 0000000000..8edbcae586 --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/submission.json @@ -0,0 +1,22 @@ +{ + "author": "Ethan Yang", + "github_id": "EthanYangTW", + "name": "Record: int5 GPTQ + 33.6M model + Soft-Round QAT + Legal Score-First TTT", + "blurb": "int5 GPTQ quantization ([-15,15], 31 levels) with Hessian-aware error compensation enables 33.6M params in 16MB. Soft-Round QAT (differentiable tanh rounding, alpha 1→16) replaces STE for better training quality. MHA 8/8, BigramHash 8192, MLP 3.5x (1792), XSA all 11 layers, Early QAT 0.5, EMA 0.997, legal score-first AdamW TTT with cosine LR decay.", + "date": "2026-03-24T00:00:00Z", + "val_bpb": 1.1162, + "val_bpb_std": 0.0006, + "val_loss_seed1337": 1.88347869, + "val_bpb_seed1337": 1.11550587, + "val_loss_seed42": 1.88480123, + "val_bpb_seed42": 1.11628915, + "val_loss_seed7": 1.88543543, + "val_bpb_seed7": 1.11666477, + "bytes_seed1337": 15822078, + "bytes_seed42": 15415405, + "bytes_seed7": 15368627, + "model_params": 33580124, + "quantization": "int5 GPTQ ([-15,15], 31 levels) + Soft-Round QAT", + "compression": "zstd-22", + "ttt": "legal score-first AdamW, 3 epochs, cosine LR across chunks" +} diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_gpt.py b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_gpt.py new file mode 100644 index 0000000000..757c513587 --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_gpt.py @@ -0,0 +1,2273 @@ +"""V25: LeakyReLU^2 + TempCal + Mixed int5/int6 + 33.6M model.""" +from __future__ import annotations +import copy +import glob +import io +import math +import os +import random +import subprocess +import sys +import time +import uuid +import zlib +from pathlib import Path +try: + import zstandard + _COMPRESSOR = "zstd" +except ImportError: + _COMPRESSOR = "zlib" +import numpy as np +import sentencepiece as spm +import torch +import torch.distributed as dist +import torch.nn.functional as F +from torch import Tensor, nn +from torch.nn.parallel import DistributedDataParallel as DDP +try: + from flash_attn_interface import flash_attn_func as flash_attn_3_func + _HAS_FA3 = True +except ImportError: + try: + from flash_attn import flash_attn_func as flash_attn_3_func + _HAS_FA3 = True + except ImportError: + _HAS_FA3 = False + flash_attn_3_func = None + +# ===================== PPM N-gram Model ===================== +import collections + +class PPMModel: + """Prediction by Partial Matching — online n-gram model. + + Builds token-level n-gram statistics from already-scored validation tokens. + At prediction time, backs off from order K down to order 0 (unigram), + blending probabilities via escape mechanism. + + This is 100% legal: it only uses tokens that have already been scored. + """ + + def __init__(self, max_order: int = 6, vocab_size: int = 1024): + self.max_order = max_order + self.vocab_size = vocab_size + # counts[order][context_tuple] = Counter of next tokens + self.counts: list[dict[tuple, collections.Counter]] = [ + {} for _ in range(max_order + 1) + ] + self.total_tokens = 0 + + def update(self, tokens): + """Add observed tokens to the model. tokens = 1D list/array of token IDs.""" + tokens = list(tokens) + self.total_tokens += len(tokens) + for i, tok in enumerate(tokens): + for order in range(min(i, self.max_order) + 1): + ctx = tuple(tokens[i - order:i]) if order > 0 else () + if ctx not in self.counts[order]: + self.counts[order][ctx] = collections.Counter() + self.counts[order][ctx][tok] += 1 + + def predict_probs(self, context_tokens, device=None): + """Return probability distribution over vocab given context. + + Uses PPM Method C escape mechanism: + At each order, allocate escape probability = num_unique / (num_unique + total_count) + and distribute remaining probability proportional to counts. + """ + import torch + context = list(context_tokens) + + # Start with uniform distribution (order -1) + probs = torch.ones(self.vocab_size, dtype=torch.float32) / self.vocab_size + if device is not None: + probs = probs.to(device) + + # Blend from lowest order up to highest + for order in range(min(len(context), self.max_order) + 1): + ctx = tuple(context[-order:]) if order > 0 else () + if ctx in self.counts[order]: + counter = self.counts[order][ctx] + total = sum(counter.values()) + unique = len(counter) + # Escape probability (PPM Method C) + escape = unique / (unique + total) + # Build distribution for this order + order_probs = torch.zeros(self.vocab_size, dtype=torch.float32) + if device is not None: + order_probs = order_probs.to(device) + for tok, cnt in counter.items(): + if tok < self.vocab_size: + order_probs[tok] = cnt / total + # Blend: (1-escape) * order_probs + escape * lower_order_probs + probs = (1.0 - escape) * order_probs + escape * probs + + return probs + + def predict_batch(self, context_batch, targets, device=None): + """Compute log-probs for a batch of (context, target) pairs. + + context_batch: list of token lists (each is the context for one prediction) + targets: tensor of target token IDs + + Returns tensor of log-probabilities (same shape as targets). + """ + import torch + log_probs = torch.zeros(len(targets), dtype=torch.float32) + if device is not None: + log_probs = log_probs.to(device) + + for i, (ctx, tgt) in enumerate(zip(context_batch, targets)): + probs = self.predict_probs(ctx, device=device) + log_probs[i] = torch.log(probs[tgt] + 1e-10) + + return log_probs + + +class FastPPMModel: + """Faster PPM using batch numpy operations and hash-based lookup. + + Trades memory for speed. Maintains only orders 0-4 for tractability. + Uses a single forward pass over scored tokens to update. + """ + + def __init__(self, max_order: int = 4, vocab_size: int = 1024): + self.max_order = max_order + self.vocab_size = vocab_size + # For each order, store: hash(context) -> array of counts + self.counts = [{} for _ in range(max_order + 1)] + self.total_tokens = 0 + self._unigram = None # cached unigram distribution + + def update_chunk(self, tokens): + """Update with a chunk of tokens. tokens = list or 1D numpy/torch array.""" + if hasattr(tokens, 'cpu'): + tokens = tokens.cpu().tolist() + elif hasattr(tokens, 'tolist'): + tokens = tokens.tolist() + + n = len(tokens) + self.total_tokens += n + + for i in range(n): + tok = tokens[i] + for order in range(min(i, self.max_order) + 1): + if order == 0: + ctx_key = 0 # empty context + else: + ctx_key = hash(tuple(tokens[i-order:i])) + + if ctx_key not in self.counts[order]: + self.counts[order][ctx_key] = {} + d = self.counts[order][ctx_key] + d[tok] = d.get(tok, 0) + 1 + + self._unigram = None # invalidate cache + + def score_sequence(self, tokens, start_pos=0): + """Score a sequence, returning NLL for each position from start_pos. + + Returns list of -log2(prob) for each token (bits, not nats). + """ + import math + if hasattr(tokens, 'cpu'): + tokens = tokens.cpu().tolist() + elif hasattr(tokens, 'tolist'): + tokens = tokens.tolist() + + scores = [] + for i in range(start_pos, len(tokens)): + prob = self._predict_one(tokens, i) + scores.append(-math.log2(max(prob, 1e-10))) + return scores + + def get_log_probs_tensor(self, tokens, start_pos, device): + """Get log probabilities as a tensor for interpolation with neural model.""" + import torch, math + if hasattr(tokens, 'cpu'): + tokens = tokens.cpu().tolist() + elif hasattr(tokens, 'tolist'): + tokens = tokens.tolist() + + n = len(tokens) - start_pos + log_probs = torch.zeros(n, dtype=torch.float32, device=device) + + for i in range(start_pos, len(tokens)): + prob = self._predict_one(tokens, i) + log_probs[i - start_pos] = math.log(max(prob, 1e-10)) + + return log_probs + + def _predict_one(self, tokens, pos): + """Predict probability of tokens[pos] given tokens[:pos].""" + target = tokens[pos] + + # Start with uniform + prob = 1.0 / self.vocab_size + + for order in range(min(pos, self.max_order) + 1): + if order == 0: + ctx_key = 0 + else: + ctx_key = hash(tuple(tokens[pos-order:pos])) + + if ctx_key in self.counts[order]: + d = self.counts[order][ctx_key] + total = sum(d.values()) + unique = len(d) + escape = unique / (unique + total) + + count = d.get(target, 0) + if count > 0: + order_prob = count / total + prob = (1.0 - escape) * order_prob + escape * prob + else: + prob = escape * prob + + return prob + + + + +class ExactMatchCache: + """Hash-based exact-match n-gram cache. + + Stores (context_hash → Counter of next tokens) from already-scored tokens. + For repeated patterns in val data, gives near-perfect predictions. + """ + + def __init__(self, orders=(3, 4, 5, 6, 7, 8), vocab_size=1024): + self.orders = orders + self.vocab_size = vocab_size + # For each order: hash(context) -> {token: count} + self.tables = {o: {} for o in orders} + self.total_tokens = 0 + + def update_chunk(self, tokens): + """Add a chunk of tokens to the cache.""" + if hasattr(tokens, 'cpu'): + tokens = tokens.cpu().tolist() + elif hasattr(tokens, 'tolist'): + tokens = tokens.tolist() + + n = len(tokens) + self.total_tokens += n + + for i in range(n): + tok = tokens[i] + for order in self.orders: + if i >= order: + ctx = hash(tuple(tokens[i-order:i])) + if ctx not in self.tables[order]: + self.tables[order][ctx] = {} + d = self.tables[order][ctx] + d[tok] = d.get(tok, 0) + 1 + + def predict_one(self, tokens, pos): + """Get probability of tokens[pos] given exact context matches. + + Returns (prob, matched_order) or (None, -1) if no match. + Uses highest-order match available. + """ + target = tokens[pos] + + # Try highest order first + for order in sorted(self.orders, reverse=True): + if pos >= order: + ctx = hash(tuple(tokens[pos-order:pos])) + if ctx in self.tables[order]: + d = self.tables[order][ctx] + total = sum(d.values()) + if total >= 2: # require at least 2 observations + prob = d.get(target, 0) / total + return prob, order + + return None, -1 + + def get_interpolation_nll(self, tokens, pos, neural_nll, alpha_cache=0.3): + """Interpolate cache prediction with neural model NLL. + + Args: + tokens: full token sequence (list) + pos: position to predict + neural_nll: neural model NLL for this position (float) + alpha_cache: weight for cache (0.3 = 30% cache, 70% neural) + + Returns: interpolated NLL + """ + import math + cache_prob, order = self.predict_one(tokens, pos) + + if cache_prob is not None and order >= 4: + neural_prob = math.exp(-neural_nll) + # Higher weight for longer matches + weight = min(alpha_cache * (order / max(self.orders)), 0.5) + mixed_prob = (1 - weight) * neural_prob + weight * cache_prob + return -math.log(max(mixed_prob, 1e-10)) + + return neural_nll + + +# ===================== Interpolation Helper ===================== + +def interpolate_with_ppm(neural_logits, ppm_model, tokens, window_start, seq_len, + stride, alpha=0.85, device=None): + """Interpolate neural model logits with PPM predictions. + + Args: + neural_logits: (batch, seq_len, vocab) from neural model + ppm_model: FastPPMModel instance + tokens: full val_tokens tensor + window_start: starting position of this window + seq_len: sequence length + stride: stride for scoring + alpha: weight for neural model (1-alpha for PPM) + device: torch device + + Returns: + interpolated NLL values for scored positions + """ + import torch + # For now, just return neural logits — PPM interpolation happens at the NLL level + # We compute PPM log-probs and do log-space interpolation + pass + + +class LogisticContextMixer: + """GPU-vectorized logistic context mixing (inspired by PAQ compression). + + Maintains GPU-resident n-gram count tables and learns online mixing weights + using the Hedge/multiplicative-weights algorithm. All operations are batched + tensor ops — no Python per-token loops. + + Experts: + 0: Neural model (logits passed in) + 1: Unigram frequencies from scored tokens + 2: Bigram frequencies (prev_token → next_token) + """ + + def __init__(self, vocab_size: int = 1024, device: str = 'cuda', eta: float = 0.1): + self.V = vocab_size + self.device = device + self.eta = eta # Hedge learning rate + self.K = 3 # number of experts + + # Expert weights (log-domain for numerical stability) + self.log_weights = torch.zeros(self.K, device=device) + + # N-gram count tables (GPU-resident) + self.uni_counts = torch.zeros(vocab_size, device=device) + self.bi_counts = torch.zeros(vocab_size, vocab_size, device=device) + self.total_tokens = 0 + + def update(self, tokens): + """Update n-gram tables with newly scored tokens. Fully vectorized.""" + if hasattr(tokens, 'cpu'): + t = tokens.to(self.device).long() + else: + t = torch.tensor(tokens, device=self.device, dtype=torch.long) + + n = t.numel() + if n == 0: + return + self.total_tokens += n + + # Unigram: bincount + self.uni_counts.scatter_add_(0, t, torch.ones(n, device=self.device)) + + # Bigram: scatter_add into [V, V] table + if n >= 2: + ctx = t[:-1] + nxt = t[1:] + bi_idx = ctx * self.V + nxt + flat = torch.zeros(self.V * self.V, device=self.device) + flat.scatter_add_(0, bi_idx, torch.ones(n - 1, device=self.device)) + self.bi_counts += flat.reshape(self.V, self.V) + + def get_expert_log_probs(self, neural_logits, x_batch, y_batch, wlens): + """Get log-probability of targets from each expert. All GPU-vectorized. + + Args: + neural_logits: [bsz, seq_len, V] neural model logits + x_batch: [bsz, seq_len] input tokens (context) + y_batch: [bsz, seq_len] target tokens + wlens: list of actual lengths per sequence + + Returns: + expert_nll: [bsz, seq_len, K] NLL from each expert + """ + bsz, slen, V = neural_logits.shape + + # Expert 0: Neural model + neural_lp = F.log_softmax(neural_logits, dim=-1) + neural_nll = -neural_lp.gather(2, y_batch.unsqueeze(2)).squeeze(2) # [bsz, slen] + + # Expert 1: Unigram + uni_total = self.uni_counts.sum() + if uni_total > 0: + uni_probs = (self.uni_counts + 0.1) / (uni_total + 0.1 * self.V) + uni_lp = uni_probs.log() + uni_nll = -uni_lp[y_batch] # [bsz, slen] + else: + uni_nll = torch.full((bsz, slen), math.log(self.V), device=self.device) + + # Expert 2: Bigram P(next | prev) + bi_total = self.bi_counts.sum(dim=1, keepdim=True) # [V, 1] + if bi_total.sum() > 0: + bi_probs = (self.bi_counts + 0.1) / (bi_total + 0.1 * self.V) # [V, V] + bi_lp = bi_probs.log() + # Lookup: for each position, prev=x_batch, next=y_batch + prev_flat = x_batch.reshape(-1) # [bsz*slen] + next_flat = y_batch.reshape(-1) + bi_nll_flat = -bi_lp[prev_flat, next_flat] + bi_nll = bi_nll_flat.reshape(bsz, slen) + else: + bi_nll = torch.full((bsz, slen), math.log(self.V), device=self.device) + + # Stack: [bsz, slen, K] + return torch.stack([neural_nll, uni_nll, bi_nll], dim=-1) + + def mix_and_score(self, neural_logits, x_batch, y_batch, wlens): + """Compute mixed NLL using current expert weights. Returns [bsz, slen] NLL. + + Uses log-domain mixing: NLL_mixed = -log(sum_k w_k * exp(-NLL_k)) + """ + if self.total_tokens < 10000: + # Not enough data for n-grams — just use neural + return F.cross_entropy( + neural_logits.reshape(-1, neural_logits.size(-1)), + y_batch.reshape(-1), reduction="none" + ).reshape(neural_logits.shape[0], neural_logits.shape[1]) + + expert_nll = self.get_expert_log_probs(neural_logits, x_batch, y_batch, wlens) # [bsz, slen, K] + + # Log-domain mixing: log(sum_k w_k * p_k) = logsumexp(log_w_k + log_p_k) + log_w = self.log_weights - self.log_weights.logsumexp(0) # normalize + # expert_lp = -expert_nll [bsz, slen, K] + mixed_lp = (-expert_nll + log_w.unsqueeze(0).unsqueeze(0)).logsumexp(dim=-1) # [bsz, slen] + + return -mixed_lp # mixed NLL + + def update_weights(self, neural_logits, x_batch, y_batch, wlens): + """Update expert weights using Hedge algorithm on this batch's losses.""" + if self.total_tokens < 10000: + return + + with torch.no_grad(): + expert_nll = self.get_expert_log_probs(neural_logits, x_batch, y_batch, wlens) # [bsz, slen, K] + + # Mean loss per expert across valid positions + mask = torch.zeros(expert_nll.shape[0], expert_nll.shape[1], device=self.device) + for i, wl in enumerate(wlens): + mask[i, :wl] = 1.0 + + # Masked mean NLL per expert + masked_nll = expert_nll * mask.unsqueeze(-1) + expert_mean_loss = masked_nll.sum(dim=(0, 1)) / mask.sum().clamp(min=1) # [K] + + # Hedge update: log_w -= eta * loss + self.log_weights -= self.eta * expert_mean_loss + + +class Hyperparameters: + data_path = os.environ.get("DATA_PATH", "./data/datasets/fineweb10B_sp1024") + train_files = os.path.join(data_path, "fineweb_train_*.bin") + val_files = os.path.join(data_path, "fineweb_val_*.bin") + tokenizer_path = os.environ.get("TOKENIZER_PATH", "./data/tokenizers/fineweb_1024_bpe.model") + run_id = os.environ.get("RUN_ID", str(uuid.uuid4())) + seed = int(os.environ.get("SEED", 1337)) + val_batch_size = int(os.environ.get("VAL_BATCH_SIZE", 524_288)) + val_loss_every = int(os.environ.get("VAL_LOSS_EVERY", 4000)) + train_log_every = int(os.environ.get("TRAIN_LOG_EVERY", 500)) + iterations = int(os.environ.get("ITERATIONS", 20000)) + warmdown_iters = int(os.environ.get("WARMDOWN_ITERS", 3500)) + warmup_steps = int(os.environ.get("WARMUP_STEPS", 20)) + train_batch_tokens = int(os.environ.get("TRAIN_BATCH_TOKENS", 786_432)) + train_seq_len = int(os.environ.get("TRAIN_SEQ_LEN", 2048)) + eval_seq_len = int(os.environ.get("EVAL_SEQ_LEN", 2048)) + max_wallclock_seconds = float(os.environ.get("MAX_WALLCLOCK_SECONDS", 600.0)) + qk_gain_init = float(os.environ.get("QK_GAIN_INIT", 1.5)) + vocab_size = int(os.environ.get("VOCAB_SIZE", 1024)) + num_layers = int(os.environ.get("NUM_LAYERS", 11)) + num_kv_heads = int(os.environ.get("NUM_KV_HEADS", 8)) + model_dim = int(os.environ.get("MODEL_DIM", 512)) + num_heads = int(os.environ.get("NUM_HEADS", 8)) + mlp_mult = float(os.environ.get("MLP_MULT", 3.5)) + tie_embeddings = bool(int(os.environ.get("TIE_EMBEDDINGS", "1"))) + rope_base = float(os.environ.get("ROPE_BASE", 10000.0)) + logit_softcap = float(os.environ.get("LOGIT_SOFTCAP", 30.0)) + embed_lr = float(os.environ.get("EMBED_LR", 0.6)) + head_lr = float(os.environ.get("HEAD_LR", 0.008)) + tied_embed_lr = float(os.environ.get("TIED_EMBED_LR", 0.035)) + tied_embed_init_std = float(os.environ.get("TIED_EMBED_INIT_STD", 0.005)) + matrix_lr = float(os.environ.get("MATRIX_LR", 0.025)) + scalar_lr = float(os.environ.get("SCALAR_LR", 0.025)) + muon_momentum = float(os.environ.get("MUON_MOMENTUM", 0.99)) + muon_backend_steps = int(os.environ.get("MUON_BACKEND_STEPS", 5)) + muon_momentum_warmup_start = float(os.environ.get("MUON_MOMENTUM_WARMUP_START", 0.92)) + muon_momentum_warmup_steps = int(os.environ.get("MUON_MOMENTUM_WARMUP_STEPS", 1500)) + beta1 = float(os.environ.get("BETA1", 0.9)) + beta2 = float(os.environ.get("BETA2", 0.95)) + adam_eps = float(os.environ.get("ADAM_EPS", 1e-8)) + grad_clip_norm = float(os.environ.get("GRAD_CLIP_NORM", 0.3)) + eval_stride = int(os.environ.get("EVAL_STRIDE", 32)) + int6_last_n = int(os.environ.get("INT6_LAST_N", 2)) # last N layers use int6, rest use int5 + ttt_temperature = float(os.environ.get("TTT_TEMPERATURE", 0.98)) # post-TTT temperature calibration + muon_beta2 = float(os.environ.get("MUON_BETA2", 0.95)) + swa_enabled = bool(int(os.environ.get("SWA_ENABLED", "1"))) + swa_every = int(os.environ.get("SWA_EVERY", 50)) + + muon_wd = float(os.environ.get("MUON_WD", 0.04)) + adam_wd = float(os.environ.get("ADAM_WD", 0.04)) + qat_enabled = bool(int(os.environ.get("QAT_ENABLED", "0"))) + bigram_vocab_size = int(os.environ.get("BIGRAM_VOCAB_SIZE", 8192)) + bigram_dim = int(os.environ.get("BIGRAM_DIM", 128)) + xsa_last_n = int(os.environ.get("XSA_LAST_N", 11)) + rope_dims = int(os.environ.get("ROPE_DIMS", 16)) + ln_scale = bool(int(os.environ.get("LN_SCALE", "1"))) + dtg_enabled = bool(int(os.environ.get("DTG_ENABLED", "0"))) + late_qat_threshold = float(os.environ.get("LATE_QAT_THRESHOLD", 0.5)) + ve_enabled = bool(int(os.environ.get("VE_ENABLED", "1"))) + ve_dim = int(os.environ.get("VE_DIM", 128)) + ve_layers = os.environ.get("VE_LAYERS", "9,10") + prune_pct = float(os.environ.get("PRUNE_PCT", 0.02)) + +def zeropower_via_newtonschulz5(G: Tensor, steps: int = 10, eps: float = 1e-7) -> Tensor: + a, b, c = (3.4445, -4.7750, 2.0315) + X = G.bfloat16() + X /= X.norm() + eps + transposed = G.size(0) > G.size(1) + if transposed: + X = X.T + for _ in range(steps): + A = X @ X.T + B = b * A + c * A @ A + X = a * X + B @ X + return X.T if transposed else X + +class Muon(torch.optim.Optimizer): + def __init__(self, params, lr: float, momentum: float, backend_steps: int, + nesterov: bool = True, weight_decay: float = 0.0): + super().__init__( + params, + dict(lr=lr, momentum=momentum, backend_steps=backend_steps, + nesterov=nesterov, weight_decay=weight_decay), + ) + @torch.no_grad() + def step(self, closure=None): + loss = None + if closure is not None: + with torch.enable_grad(): + loss = closure() + distributed = dist.is_available() and dist.is_initialized() + world_size = dist.get_world_size() if distributed else 1 + rank = dist.get_rank() if distributed else 0 + for group in self.param_groups: + params = group["params"] + if not params: + continue + lr = group["lr"] + momentum = group["momentum"] + backend_steps = group["backend_steps"] + nesterov = group["nesterov"] + total_params = sum(int(p.numel()) for p in params) + updates_flat = torch.zeros(total_params, device=params[0].device, dtype=torch.bfloat16) + curr = 0 + for i, p in enumerate(params): + if i % world_size == rank and p.grad is not None: + g = p.grad + state = self.state[p] + if "momentum_buffer" not in state: + state["momentum_buffer"] = torch.zeros_like(g) + buf = state["momentum_buffer"] + buf.mul_(momentum).add_(g) + if nesterov: + g = g.add(buf, alpha=momentum) + g = zeropower_via_newtonschulz5(g, steps=backend_steps) + g *= max(1, g.size(0) / g.size(1)) ** 0.5 + updates_flat[curr : curr + p.numel()] = g.reshape(-1) + curr += p.numel() + if distributed: + dist.all_reduce(updates_flat, op=dist.ReduceOp.SUM) + wd = group.get("weight_decay", 0.0) + curr = 0 + for p in params: + if wd > 0.0: + p.data.mul_(1.0 - lr * wd) + g = updates_flat[curr : curr + p.numel()].view_as(p).to(dtype=p.dtype) + p.add_(g, alpha=-lr) + curr += p.numel() + return loss + +def build_sentencepiece_luts( + sp: spm.SentencePieceProcessor, vocab_size: int, device: torch.device +) -> tuple[Tensor, Tensor, Tensor]: + sp_vocab_size = int(sp.vocab_size()) + table_size = max(sp_vocab_size, vocab_size) + base_bytes_np = np.zeros((table_size,), dtype=np.int16) + has_leading_space_np = np.zeros((table_size,), dtype=np.bool_) + is_boundary_token_np = np.ones((table_size,), dtype=np.bool_) + for token_id in range(sp_vocab_size): + if sp.is_control(token_id) or sp.is_unknown(token_id) or sp.is_unused(token_id): + continue + is_boundary_token_np[token_id] = False + if sp.is_byte(token_id): + base_bytes_np[token_id] = 1 + continue + piece = sp.id_to_piece(token_id) + if piece.startswith("▁"): + has_leading_space_np[token_id] = True + piece = piece[1:] + base_bytes_np[token_id] = len(piece.encode("utf-8")) + return ( + torch.tensor(base_bytes_np, dtype=torch.int16, device=device), + torch.tensor(has_leading_space_np, dtype=torch.bool, device=device), + torch.tensor(is_boundary_token_np, dtype=torch.bool, device=device), + ) + +def load_validation_tokens(pattern: str, seq_len: int) -> Tensor: + files = [Path(p) for p in sorted(glob.glob(pattern))] + if not files: + raise FileNotFoundError(f"No files found for pattern: {pattern}") + tokens = torch.cat([load_data_shard(file) for file in files]).contiguous() + usable = ((tokens.numel() - 1) // seq_len) * seq_len + if usable <= 0: + raise ValueError(f"Validation split is too short for TRAIN_SEQ_LEN={seq_len}") + return tokens[: usable + 1] + +def eval_val(args: Hyperparameters, model: nn.Module, rank: int, world_size: int, + device: torch.device, grad_accum_steps: int, val_tokens: Tensor, + base_bytes_lut: Tensor, has_leading_space_lut: Tensor, + is_boundary_token_lut: Tensor, eval_seq_len: int | None = None) -> tuple[float, float]: + seq_len = eval_seq_len or args.train_seq_len + local_batch_tokens = args.val_batch_size // (world_size * grad_accum_steps) + if local_batch_tokens < seq_len: + raise ValueError( + "VAL_BATCH_SIZE must provide at least one sequence per rank; " + f"got VAL_BATCH_SIZE={args.val_batch_size}, WORLD_SIZE={world_size}, " + f"GRAD_ACCUM_STEPS={grad_accum_steps}, seq_len={seq_len}" + ) + local_batch_seqs = local_batch_tokens // seq_len + total_seqs = (val_tokens.numel() - 1) // seq_len + seq_start = (total_seqs * rank) // world_size + seq_end = (total_seqs * (rank + 1)) // world_size + val_loss_sum = torch.zeros((), device=device, dtype=torch.float64) + val_token_count = torch.zeros((), device=device, dtype=torch.float64) + val_byte_count = torch.zeros((), device=device, dtype=torch.float64) + model.eval() + with torch.inference_mode(): + for batch_seq_start in range(seq_start, seq_end, local_batch_seqs): + batch_seq_end = min(batch_seq_start + local_batch_seqs, seq_end) + raw_start = batch_seq_start * seq_len + raw_end = batch_seq_end * seq_len + 1 + local = val_tokens[raw_start:raw_end].to(device=device, dtype=torch.int64, non_blocking=True) + x = local[:-1].reshape(-1, seq_len) + y = local[1:].reshape(-1, seq_len) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16, enabled=True): + batch_loss = model(x, y).detach() + batch_token_count = float(y.numel()) + val_loss_sum += batch_loss.to(torch.float64) * batch_token_count + val_token_count += batch_token_count + prev_ids = x.reshape(-1) + tgt_ids = y.reshape(-1) + token_bytes = base_bytes_lut[tgt_ids].to(dtype=torch.int16) + token_bytes += (has_leading_space_lut[tgt_ids] & ~is_boundary_token_lut[prev_ids]).to(dtype=torch.int16) + val_byte_count += token_bytes.to(torch.float64).sum() + if dist.is_available() and dist.is_initialized(): + dist.all_reduce(val_loss_sum, op=dist.ReduceOp.SUM) + dist.all_reduce(val_token_count, op=dist.ReduceOp.SUM) + dist.all_reduce(val_byte_count, op=dist.ReduceOp.SUM) + val_loss = val_loss_sum / val_token_count + bits_per_token = val_loss.item() / math.log(2.0) + tokens_per_byte = val_token_count.item() / val_byte_count.item() + model.train() + return float(val_loss.item()), float(bits_per_token * tokens_per_byte) +CONTROL_TENSOR_NAME_PATTERNS = tuple( + pattern + for pattern in os.environ.get( + "CONTROL_TENSOR_NAME_PATTERNS", + "attn_scale,attn_scales,mlp_scale,mlp_scales,resid_mix,resid_mixes,q_gain,skip_weight,skip_weights,smear,dtg_gate,ve_layer_scales,ve_shared.scale", + ).split(",") + if pattern +) +INT8_PER_ROW_SCALE_DTYPE = torch.float16 +INT8_CLIP_Q = 0.9999984 + +def tensor_nbytes(t: Tensor) -> int: + return int(t.numel()) * int(t.element_size()) + +def quantize_float_tensor(t: Tensor) -> tuple[Tensor, Tensor]: + t32 = t.float() + if t32.ndim == 2: + clip_abs = ( + torch.quantile(t32.abs(), INT8_CLIP_Q, dim=1) + if t32.numel() + else torch.empty((t32.shape[0],), dtype=torch.float32) + ) + clipped = torch.maximum(torch.minimum(t32, clip_abs[:, None]), -clip_abs[:, None]) + scale = (clip_abs / 127.0).clamp_min(1.0 / 127.0) + q = torch.clamp(torch.round(clipped / scale[:, None]), -127, 127).to(torch.int8).contiguous() + return q, scale.to(dtype=INT8_PER_ROW_SCALE_DTYPE).contiguous() + clip_abs = float(torch.quantile(t32.abs().flatten(), INT8_CLIP_Q).item()) if t32.numel() else 0.0 + scale = torch.tensor(clip_abs / 127.0 if clip_abs > 0 else 1.0, dtype=torch.float32) + q = torch.clamp(torch.round(torch.clamp(t32, -clip_abs, clip_abs) / scale), -127, 127).to(torch.int8).contiguous() + return q, scale + +def load_data_shard(file: Path) -> Tensor: + header_bytes = 256 * np.dtype(" None: + self.file_idx = (self.file_idx + 1) % len(self.files) + self.tokens = load_data_shard(self.files[self.file_idx]) + self.pos = 0 + + def take(self, n: int) -> Tensor: + chunks: list[Tensor] = [] + remaining = n + while remaining > 0: + avail = self.tokens.numel() - self.pos + if avail <= 0: + self._advance_file() + continue + k = min(remaining, avail) + chunks.append(self.tokens[self.pos : self.pos + k]) + self.pos += k + remaining -= k + return chunks[0] if len(chunks) == 1 else torch.cat(chunks) + +class DistributedTokenLoader: + def __init__(self, pattern: str, rank: int, world_size: int, device: torch.device): + self.rank = rank + self.world_size = world_size + self.device = device + self.stream = TokenStream(pattern) + + def next_batch(self, global_tokens: int, seq_len: int, grad_accum_steps: int) -> tuple[Tensor, Tensor]: + local_tokens = global_tokens // (self.world_size * grad_accum_steps) + per_rank_span = local_tokens + 1 + chunk = self.stream.take(per_rank_span * self.world_size) + start = self.rank * per_rank_span + local = chunk[start : start + per_rank_span].to(dtype=torch.int64) + x = local[:-1].reshape(-1, seq_len) + y = local[1:].reshape(-1, seq_len) + return x.to(self.device, non_blocking=True), y.to(self.device, non_blocking=True) + +class RMSNorm(nn.Module): + def __init__(self, eps: float | None = None): + super().__init__() + self.eps = eps + + def forward(self, x: Tensor) -> Tensor: + return F.rms_norm(x, (x.size(-1),), eps=self.eps) + +class CastedLinear(nn.Linear): + _qat_enabled: bool = False + _soft_round_alpha: float = 1.0 # temperature for soft-round (annealed during training) + _use_soft_round: bool = False # enable soft-round QAT instead of STE + + def __init__(self, *args, **kwargs): + super().__init__(*args, **kwargs) + self._clip_range = 15 # default int5, set to 31 for int6 layers + + @staticmethod + def soft_round(y: Tensor, alpha: float) -> Tensor: + """Differentiable approximation to round() from Agustsson & Theis (NeurIPS 2020). + s_alpha(y) = floor(y) + 0.5 * tanh(alpha * r) / tanh(alpha/2) + 0.5 + where r = y - floor(y) - 0.5 (centered fractional part) + """ + fl = torch.floor(y) + r = y - fl - 0.5 + return fl + 0.5 * torch.tanh(alpha * r) / (math.tanh(alpha / 2) + 1e-10) + 0.5 + + def forward(self, x: Tensor) -> Tensor: + w = self.weight.to(x.dtype) + cr = self._clip_range + if CastedLinear._qat_enabled and self.training and w.ndim == 2: + if CastedLinear._use_soft_round: + # Soft-Round QAT: differentiable rounding with temperature annealing + w32 = self.weight.float() + row_clip = torch.quantile(w32.abs(), 0.9995, dim=1) + scale = (row_clip / float(cr)).clamp_min(1.0 / float(cr)) + w_scaled = w32 / scale[:, None] + w_rounded = CastedLinear.soft_round(w_scaled, CastedLinear._soft_round_alpha) + w_q = (torch.clamp(w_rounded, -(cr+1), cr) * scale[:, None]).to(x.dtype) + w = w_q # fully differentiable path + else: + # Original STE QAT + with torch.no_grad(): + w32 = self.weight.float() + row_clip = torch.quantile(w32.abs(), 0.9995, dim=1) + scale = (row_clip / float(cr)).clamp_min(1.0 / float(cr)) + w_q = (torch.clamp(torch.round(w32 / scale[:, None]), -(cr+1), cr) * scale[:, None]).to(x.dtype) + w = w + (w_q - w).detach() + bias = self.bias.to(x.dtype) if self.bias is not None else None + return F.linear(x, w, bias) + +def restore_low_dim_params_to_fp32(module: nn.Module) -> None: + with torch.no_grad(): + for name, param in module.named_parameters(): + if (param.ndim < 2 or any(pattern in name for pattern in CONTROL_TENSOR_NAME_PATTERNS)) and param.dtype != torch.float32: + param.data = param.data.float() + +class Rotary(nn.Module): + def __init__(self, dim: int, base: float = 10000.0, train_seq_len: int = 1024, rope_dims: int = 0): + super().__init__() + self.dim = dim + self.base = base + self.train_seq_len = train_seq_len + self.rope_dims = rope_dims if rope_dims > 0 else dim + inv_freq = 1.0 / (base ** (torch.arange(0, self.rope_dims, 2, dtype=torch.float32) / self.rope_dims)) + self.register_buffer("inv_freq", inv_freq, persistent=False) + self._seq_len_cached = 0 + self._cos_cached: Tensor | None = None + self._sin_cached: Tensor | None = None + + def forward(self, seq_len: int, device: torch.device, dtype: torch.dtype) -> tuple[Tensor, Tensor]: + if ( + self._cos_cached is None + or self._sin_cached is None + or self._seq_len_cached != seq_len + or self._cos_cached.device != device + ): + rd = self.rope_dims + if seq_len > self.train_seq_len: + scale = seq_len / self.train_seq_len + new_base = self.base * (scale ** (rd / (rd - 2))) + inv_freq = 1.0 / (new_base ** (torch.arange(0, rd, 2, dtype=torch.float32, device=device) / rd)) + else: + inv_freq = self.inv_freq.to(device) + t = torch.arange(seq_len, device=device, dtype=inv_freq.dtype) + freqs = torch.outer(t, inv_freq) + self._cos_cached = freqs.cos()[None, :, None, :] + self._sin_cached = freqs.sin()[None, :, None, :] + self._seq_len_cached = seq_len + return self._cos_cached.to(dtype=dtype), self._sin_cached.to(dtype=dtype) + +def apply_rotary_emb(x: Tensor, cos: Tensor, sin: Tensor, rope_dims: int = 0) -> Tensor: + if rope_dims > 0 and rope_dims < x.size(-1): + x_rope, x_pass = x[..., :rope_dims], x[..., rope_dims:] + half = rope_dims // 2 + x1, x2 = x_rope[..., :half], x_rope[..., half:] + x_rope = torch.cat((x1 * cos + x2 * sin, x1 * (-sin) + x2 * cos), dim=-1) + return torch.cat((x_rope, x_pass), dim=-1) + half = x.size(-1) // 2 + x1, x2 = x[..., :half], x[..., half:] + return torch.cat((x1 * cos + x2 * sin, x1 * (-sin) + x2 * cos), dim=-1) + +class CausalSelfAttention(nn.Module): + def __init__(self, dim: int, num_heads: int, num_kv_heads: int, + rope_base: float, qk_gain_init: float): + super().__init__() + if dim % num_heads != 0: + raise ValueError("model_dim must be divisible by num_heads") + if num_heads % num_kv_heads != 0: + raise ValueError("num_heads must be divisible by num_kv_heads") + self.num_heads = num_heads + self.num_kv_heads = num_kv_heads + self.head_dim = dim // num_heads + if self.head_dim % 2 != 0: + raise ValueError("head_dim must be even for RoPE") + kv_dim = self.num_kv_heads * self.head_dim + self.c_q = CastedLinear(dim, dim, bias=False) + self.c_k = CastedLinear(dim, kv_dim, bias=False) + self.c_v = CastedLinear(dim, kv_dim, bias=False) + self.proj = CastedLinear(dim, dim, bias=False) + self.proj._zero_init = True + self.q_gain = nn.Parameter(torch.full((num_heads,), qk_gain_init, dtype=torch.float32)) + self.rope_dims = 0 + self.rotary = Rotary(self.head_dim, base=rope_base, train_seq_len=1024) + self.use_xsa = False + + def _xsa_efficient(self, y: Tensor, v: Tensor) -> Tensor: + B, T, H, D = y.shape + Hkv = v.size(-2) + y_g = y.reshape(B, T, Hkv, H // Hkv, D) + vn = F.normalize(v, dim=-1).unsqueeze(-2) + proj = (y_g * vn).sum(dim=-1, keepdim=True) * vn + return (y_g - proj).reshape(B, T, H, D) + + def forward(self, x: Tensor, v_embed: Tensor | None = None) -> Tensor: + bsz, seqlen, dim = x.shape + q = self.c_q(x).reshape(bsz, seqlen, self.num_heads, self.head_dim) + k = self.c_k(x).reshape(bsz, seqlen, self.num_kv_heads, self.head_dim) + v = self.c_v(x) + if v_embed is not None: + v = v + v_embed + v = v.reshape(bsz, seqlen, self.num_kv_heads, self.head_dim) + q = F.rms_norm(q, (q.size(-1),)) + k = F.rms_norm(k, (k.size(-1),)) + cos, sin = self.rotary(seqlen, x.device, q.dtype) + q = apply_rotary_emb(q, cos, sin, self.rope_dims) + k = apply_rotary_emb(k, cos, sin, self.rope_dims) + q = q * self.q_gain.to(dtype=q.dtype)[None, None, :, None] + if _HAS_FA3: + y = flash_attn_3_func(q, k, v, causal=True).contiguous() + else: + y = F.scaled_dot_product_attention( + q.transpose(1, 2), k.transpose(1, 2), v.transpose(1, 2), + attn_mask=None, is_causal=True, + enable_gqa=(self.num_kv_heads != self.num_heads), + ).transpose(1, 2) + if self.use_xsa: + y = self._xsa_efficient(y, v) + y = y.reshape(bsz, seqlen, dim) + return self.proj(y) + +class SmearGate(nn.Module): + def __init__(self, dim: int): + super().__init__() + self.gate = nn.Parameter(torch.zeros(dim, dtype=torch.float32)) + + def forward(self, x: Tensor) -> Tensor: + g = torch.sigmoid(self.gate.to(dtype=x.dtype))[None, None, :] + x_prev = torch.cat([torch.zeros_like(x[:, :1]), x[:, :-1]], dim=1) + return (1 - g) * x + g * x_prev + +class BigramHashEmbedding(nn.Module): + def __init__(self, bigram_vocab_size: int, bigram_dim: int, model_dim: int): + super().__init__() + self.bigram_vocab_size = bigram_vocab_size + self.embed = nn.Embedding(bigram_vocab_size, bigram_dim) + nn.init.zeros_(self.embed.weight) + self.proj = CastedLinear(bigram_dim, model_dim, bias=False) if bigram_dim != model_dim else None + if self.proj is not None: + nn.init.zeros_(self.proj.weight) + self.scale = nn.Parameter(torch.tensor(0.05, dtype=torch.float32)) + + def bigram_hash(self, tokens: Tensor) -> Tensor: + t = tokens.to(torch.int32) + mod = self.bigram_vocab_size - 1 + out = torch.empty_like(t) + out[..., 0] = mod + out[..., 1:] = torch.bitwise_xor(36313 * t[..., 1:], 27191 * t[..., :-1]) % mod + return out.long() + + def forward(self, token_ids: Tensor) -> Tensor: + h = self.embed(self.bigram_hash(token_ids)) + if self.proj is not None: + h = self.proj(h) + return h * self.scale.to(dtype=h.dtype) + +class ValueEmbedding(nn.Module): + def __init__(self, vocab_size: int, ve_dim: int, model_dim: int): + super().__init__() + self.embed = nn.Embedding(vocab_size, ve_dim) + nn.init.normal_(self.embed.weight, std=0.01) + self.proj = CastedLinear(ve_dim, model_dim, bias=False) if ve_dim != model_dim else None + if self.proj is not None: + nn.init.zeros_(self.proj.weight) + self.scale = nn.Parameter(torch.tensor(0.1, dtype=torch.float32)) + + def forward(self, token_ids: Tensor) -> Tensor: + h = self.embed(token_ids) + if self.proj is not None: + h = self.proj(h) + return h * self.scale.to(dtype=h.dtype) + +class MLP(nn.Module): + def __init__(self, dim: int, mlp_mult: int): + super().__init__() + hidden = int(mlp_mult * dim) + self.fc = CastedLinear(dim, hidden, bias=False) + self.proj = CastedLinear(hidden, dim, bias=False) + self.proj._zero_init = True + + def forward(self, x: Tensor) -> Tensor: + return self.proj(F.leaky_relu(self.fc(x), negative_slope=0.5).square()) + +class Block(nn.Module): + def __init__(self, dim: int, num_heads: int, num_kv_heads: int, mlp_mult: int, + rope_base: float, qk_gain_init: float, layer_idx: int = 0, + ln_scale: bool = False, dtg: bool = False): + super().__init__() + self.attn_norm = RMSNorm() + self.mlp_norm = RMSNorm() + self.attn = CausalSelfAttention(dim, num_heads, num_kv_heads, rope_base, qk_gain_init) + self.mlp = MLP(dim, mlp_mult) + self.attn_scale = nn.Parameter(torch.ones(dim, dtype=torch.float32)) + self.mlp_scale = nn.Parameter(torch.ones(dim, dtype=torch.float32)) + self.resid_mix = nn.Parameter(torch.stack((torch.ones(dim), torch.zeros(dim))).float()) + self.ln_scale_factor = 1.0 / math.sqrt(layer_idx + 1) if ln_scale else 1.0 + if dtg: + self.dtg_gate = nn.Linear(dim, 1, bias=True) + nn.init.zeros_(self.dtg_gate.weight) + nn.init.constant_(self.dtg_gate.bias, 2.0) + else: + self.dtg_gate = None + + def forward(self, x: Tensor, x0: Tensor, v_embed: Tensor | None = None) -> Tensor: + mix = self.resid_mix.to(dtype=x.dtype) + x_in = mix[0][None, None, :] * x + mix[1][None, None, :] * x0 + attn_out = self.attn(self.attn_norm(x_in) * self.ln_scale_factor, v_embed=v_embed) + x_out = x_in + self.attn_scale.to(dtype=x_in.dtype)[None, None, :] * attn_out + x_out = x_out + self.mlp_scale.to(dtype=x_out.dtype)[None, None, :] * self.mlp(self.mlp_norm(x_out) * self.ln_scale_factor) + if self.dtg_gate is not None: + gate = torch.sigmoid(self.dtg_gate(x_in.detach())) + x_out = x_in + gate * (x_out - x_in) + return x_out + +class GPT(nn.Module): + def __init__(self, vocab_size: int, num_layers: int, model_dim: int, num_heads: int, + num_kv_heads: int, mlp_mult: int, tie_embeddings: bool, tied_embed_init_std: float, + logit_softcap: float, rope_base: float, qk_gain_init: float, + bigram_vocab_size: int = 0, bigram_dim: int = 128, xsa_last_n: int = 0, + rope_dims: int = 0, ln_scale: bool = False, dtg: bool = False, + ve_enabled: bool = False, ve_dim: int = 128, ve_layers: str = "9,10"): + super().__init__() + self._ve_target_dim = num_kv_heads * (model_dim // num_heads) + if logit_softcap <= 0.0: + raise ValueError(f"logit_softcap must be positive, got {logit_softcap}") + self.tie_embeddings = tie_embeddings + self.tied_embed_init_std = tied_embed_init_std + self.logit_softcap = logit_softcap + self.tok_emb = nn.Embedding(vocab_size, model_dim) + self.bigram = BigramHashEmbedding(bigram_vocab_size, bigram_dim, model_dim) if bigram_vocab_size > 0 else None + self.smear = SmearGate(model_dim) + self.num_encoder_layers = num_layers // 2 + self.num_decoder_layers = num_layers - self.num_encoder_layers + self.num_skip_weights = min(self.num_encoder_layers, self.num_decoder_layers) + self.skip_weights = nn.Parameter(torch.ones(self.num_skip_weights, model_dim, dtype=torch.float32)) + self.blocks = nn.ModuleList([ + Block(model_dim, num_heads, num_kv_heads, mlp_mult, rope_base, + qk_gain_init, layer_idx=i, ln_scale=ln_scale, dtg=dtg) + for i in range(num_layers) + ]) + if rope_dims > 0: + head_dim = model_dim // num_heads + for block in self.blocks: + block.attn.rope_dims = rope_dims + block.attn.rotary = Rotary(head_dim, base=rope_base, train_seq_len=1024, rope_dims=rope_dims) + self.ve_layer_indices = [int(x) for x in ve_layers.split(",") if x.strip()] if ve_enabled else [] + kv_dim = self._ve_target_dim + if self.ve_layer_indices: + self.ve_shared = ValueEmbedding(vocab_size, ve_dim, kv_dim) + self.ve_layer_scales = nn.ParameterList( + [nn.Parameter(torch.ones(1, dtype=torch.float32)) for _ in self.ve_layer_indices] + ) + else: + self.ve_shared = None + self.ve_layer_scales = nn.ParameterList() + self.value_embeds = nn.ModuleList() + self.final_norm = RMSNorm() + self.lm_head = None if tie_embeddings else CastedLinear(model_dim, vocab_size, bias=False) + if self.lm_head is not None: + self.lm_head._zero_init = True + if xsa_last_n > 0: + for i in range(max(0, num_layers - xsa_last_n), num_layers): + self.blocks[i].attn.use_xsa = True + self._init_weights() + + def _init_weights(self) -> None: + if self.tie_embeddings: + nn.init.normal_(self.tok_emb.weight, mean=0.0, std=self.tied_embed_init_std) + num_layers = len(self.blocks) + for name, module in self.named_modules(): + if isinstance(module, nn.Linear): + if getattr(module, "_zero_init", False): + nn.init.zeros_(module.weight) + elif module.weight.ndim == 2 and module.weight.shape[0] >= 64 and module.weight.shape[1] >= 64: + nn.init.orthogonal_(module.weight, gain=1.0) + if ".proj." in name or name.endswith(".proj"): + with torch.no_grad(): + module.weight.mul_(1.0 / math.sqrt(2 * num_layers)) + + def _get_ve(self, layer_idx: int, input_ids: Tensor, ve_cache: dict | None = None) -> Tensor | None: + if self.ve_shared is None or layer_idx not in self.ve_layer_indices: + return None + if ve_cache is not None and 've' not in ve_cache: + ve_cache['ve'] = self.ve_shared(input_ids) + ve_base = ve_cache['ve'] if ve_cache is not None else self.ve_shared(input_ids) + ve_idx = self.ve_layer_indices.index(layer_idx) + return ve_base * self.ve_layer_scales[ve_idx].to(dtype=ve_base.dtype) + + def forward(self, input_ids: Tensor, target_ids: Tensor) -> Tensor: + x = self.tok_emb(input_ids) + if self.bigram is not None: + x = x + self.bigram(input_ids) + x = F.rms_norm(x, (x.size(-1),)) + x = self.smear(x) + x0 = x + skips: list[Tensor] = [] + ve_cache: dict = {} + for i in range(self.num_encoder_layers): + ve = self._get_ve(i, input_ids, ve_cache) + x = self.blocks[i](x, x0, v_embed=ve) + skips.append(x) + for i in range(self.num_decoder_layers): + bi = self.num_encoder_layers + i + if skips: + x = x + self.skip_weights[i].to(dtype=x.dtype)[None, None, :] * skips.pop() + ve = self._get_ve(bi, input_ids, ve_cache) + x = self.blocks[bi](x, x0, v_embed=ve) + x = self.final_norm(x) + x_flat = x.reshape(-1, x.size(-1)) + targets = target_ids.reshape(-1) + if self.tie_embeddings: + logits_proj = F.linear(x_flat, self.tok_emb.weight) + else: + if self.lm_head is None: + raise RuntimeError("lm_head is required when tie_embeddings=False") + logits_proj = self.lm_head(x_flat) + logits = self.logit_softcap * torch.tanh(logits_proj / self.logit_softcap) + return F.cross_entropy(logits.float(), targets, reduction="mean") + + def forward_logits(self, input_ids: Tensor) -> Tensor: + x = self.tok_emb(input_ids) + if self.bigram is not None: + x = x + self.bigram(input_ids) + x = F.rms_norm(x, (x.size(-1),)) + x = self.smear(x) + x0 = x + skips: list[Tensor] = [] + ve_cache: dict = {} + for i in range(self.num_encoder_layers): + ve = self._get_ve(i, input_ids, ve_cache) + x = self.blocks[i](x, x0, v_embed=ve) + skips.append(x) + for i in range(self.num_decoder_layers): + bi = self.num_encoder_layers + i + if skips: + x = x + self.skip_weights[i].to(dtype=x.dtype)[None, None, :] * skips.pop() + ve = self._get_ve(bi, input_ids, ve_cache) + x = self.blocks[bi](x, x0, v_embed=ve) + x = self.final_norm(x) + if self.tie_embeddings: + logits_proj = F.linear(x, self.tok_emb.weight) + else: + logits_proj = self.lm_head(x) + return self.logit_softcap * torch.tanh(logits_proj / self.logit_softcap) + +def eval_val_sliding(args: Hyperparameters, base_model: nn.Module, rank: int, world_size: int, + device: torch.device, val_tokens: Tensor, base_bytes_lut: Tensor, + has_leading_space_lut: Tensor, is_boundary_token_lut: Tensor, + stride: int, batch_seqs: int = 32, eval_seq_len: int | None = None) -> tuple[float, float]: + seq_len = eval_seq_len or args.train_seq_len + total_tokens = val_tokens.numel() - 1 + + window_starts = [ws for ws in range(0, total_tokens, stride) + if min(ws + seq_len, total_tokens) - ws >= 1] + total_windows = len(window_starts) + my_s = (total_windows * rank) // world_size + my_e = (total_windows * (rank + 1)) // world_size + my_windows = window_starts[my_s:my_e] + loss_sum = torch.zeros((), device=device, dtype=torch.float64) + token_count = torch.zeros((), device=device, dtype=torch.float64) + byte_count = torch.zeros((), device=device, dtype=torch.float64) + base_model.eval() + compiled_logits = torch.compile(base_model.forward_logits, dynamic=False, fullgraph=True) + + # Pre-compile: dummy forward+backward with TTT shapes to warm the compile cache + if rank == 0: + print(" ttt: pre-compiling forward+backward kernels...", flush=True) + _dummy_x = torch.zeros(1, seq_len, dtype=torch.int64, device=device) + _dummy_y = torch.zeros(1, seq_len, dtype=torch.int64, device=device) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16): + _dummy_logits = base_model.forward_logits(_dummy_x) + _dummy_loss = F.cross_entropy(_dummy_logits.reshape(-1, _dummy_logits.size(-1)), _dummy_y.reshape(-1)) + _dummy_loss.backward() + base_model.zero_grad(set_to_none=True) + if rank == 0: + print(" ttt: pre-compile done", flush=True) + with torch.inference_mode(): + for bi in range(0, len(my_windows), batch_seqs): + batch_ws = my_windows[bi:bi + batch_seqs] + bsz = len(batch_ws) + x_batch = torch.zeros(bsz, seq_len, dtype=torch.int64, device=device) + y_batch = torch.zeros(bsz, seq_len, dtype=torch.int64, device=device) + wlens: list[int] = [] + for i, ws in enumerate(batch_ws): + end = min(ws + seq_len, total_tokens) + wlen = end - ws + wlens.append(wlen) + chunk = val_tokens[ws:end + 1].to(dtype=torch.int64, device=device) + x_batch[i, :wlen] = chunk[:-1] + y_batch[i, :wlen] = chunk[1:] + with torch.autocast(device_type="cuda", dtype=torch.bfloat16): + logits = compiled_logits(x_batch) + nll = F.cross_entropy( + logits.reshape(-1, logits.size(-1)).float(), + y_batch.reshape(-1), + reduction="none", + ).reshape(bsz, seq_len) + for i, ws in enumerate(batch_ws): + wlen = wlens[i] + s = 0 if ws == 0 else max(wlen - stride, 0) + scored_nll = nll[i, s:wlen].to(torch.float64) + loss_sum += scored_nll.sum() + token_count += float(wlen - s) + tgt = y_batch[i, s:wlen] + prev = x_batch[i, s:wlen] + tb = base_bytes_lut[tgt].to(torch.float64) + tb += (has_leading_space_lut[tgt] & ~is_boundary_token_lut[prev]).to(torch.float64) + byte_count += tb.sum() + if dist.is_available() and dist.is_initialized(): + dist.all_reduce(loss_sum, op=dist.ReduceOp.SUM) + dist.all_reduce(token_count, op=dist.ReduceOp.SUM) + dist.all_reduce(byte_count, op=dist.ReduceOp.SUM) + val_loss = (loss_sum / token_count).item() + bits_per_token = val_loss / math.log(2.0) + tokens_per_byte = token_count.item() / byte_count.item() + base_model.train() + return val_loss, bits_per_token * tokens_per_byte + +def eval_val_sliding_ttt( + args: Hyperparameters, base_model: nn.Module, rank: int, world_size: int, + device: torch.device, val_tokens: Tensor, base_bytes_lut: Tensor, + has_leading_space_lut: Tensor, is_boundary_token_lut: Tensor, + stride: int, ttt_epochs: int = 3, ttt_lr: float = 0.001, + ttt_momentum: float = 0.9, ttt_freeze_blocks: int = 2, + batch_seqs: int = 32, eval_seq_len: int | None = None, + ttt_chunk_tokens: int = 32768, ttt_optimizer: str = "adamw", + ttt_temp: float = 1.0, + ppm_alpha: float = 0.85, + byte_weighted_ttt: bool = True, + use_cache: bool = True, + cache_alpha: float = 0.3, + adaptive_lr: bool = True, + adaptive_lr_max_mult: float = 3.0, +) -> tuple[float, float]: + """Legal score-first TTT: score each chunk, then train on it. + Every token scored BEFORE any update that could use it.""" + seq_len = eval_seq_len or args.train_seq_len + total_tokens = val_tokens.numel() - 1 + + # Initialize GPU-vectorized logistic context mixer + use_mixer = os.environ.get("USE_MIXER", "1") == "1" + mixer = LogisticContextMixer( + vocab_size=val_tokens.to(torch.int32).max().item() + 1, + device=device, + eta=float(os.environ.get("MIXER_ETA", "0.1")), + ) if use_mixer else None + if use_mixer and rank == 0: + print(f" Logistic context mixer enabled: eta={mixer.eta}") + if adaptive_lr and rank == 0: + print(f" Adaptive LR enabled: max_mult={adaptive_lr_max_mult}") + + # Pre-compute all window starts + window_starts = [ws for ws in range(0, total_tokens, stride) + if min(ws + seq_len, total_tokens) - ws >= stride or ws == 0] + + # Assign each window to a chunk based on scored token position + num_chunks = (total_tokens + ttt_chunk_tokens - 1) // ttt_chunk_tokens + chunk_windows: list[list[int]] = [[] for _ in range(num_chunks)] + for ws in window_starts: + end = min(ws + seq_len, total_tokens) + wlen = end - ws + s = 0 if ws == 0 else max(wlen - stride, 0) + scored_start = ws + s + ci = min(scored_start // ttt_chunk_tokens, num_chunks - 1) + chunk_windows[ci].append(ws) + + if rank == 0: + print(f"ttt:start chunks={num_chunks} chunk_tokens={ttt_chunk_tokens} " + f"windows={len(window_starts)} stride={stride} " + f"lr={ttt_lr} epochs={ttt_epochs} opt={ttt_optimizer} " + f"freeze_first={ttt_freeze_blocks}") + + loss_sum = torch.zeros((), device=device, dtype=torch.float64) + token_count = torch.zeros((), device=device, dtype=torch.float64) + byte_count = torch.zeros((), device=device, dtype=torch.float64) + + # Freeze everything, then selectively unfreeze for TTT + num_blocks = len(base_model.blocks) + for p in base_model.parameters(): + p.requires_grad_(False) + ttt_params = [] + ttt_param_ids = set() + use_qttt = os.environ.get("QTTT", "0") == "1" + if use_qttt: + # qTTT: only unfreeze Q projections in last N blocks + norms + head + for i in range(max(0, num_blocks - ttt_freeze_blocks), num_blocks): + for name, p in base_model.blocks[i].named_parameters(): + if "c_q" in name: + p.requires_grad_(True) + ttt_params.append(p) + ttt_param_ids.add(id(p)) + else: + # Standard: unfreeze all params in last N blocks + for i in range(max(0, num_blocks - ttt_freeze_blocks), num_blocks): + for p in base_model.blocks[i].parameters(): + p.requires_grad_(True) + ttt_params.append(p) + ttt_param_ids.add(id(p)) + # Unfreeze norms, scales, lm_head + for name, p in base_model.named_parameters(): + if "norm" in name or "scale" in name or "lm_head" in name: + p.requires_grad_(True) + if id(p) not in ttt_param_ids: + ttt_params.append(p) + ttt_param_ids.add(id(p)) + + if rank == 0: + n_unfrozen = sum(p.numel() for p in ttt_params) + n_frozen = sum(p.numel() for p in base_model.parameters() if not p.requires_grad) + print(f"ttt:params unfrozen={n_unfrozen} frozen={n_frozen}") + + if ttt_optimizer == "adamw": + optimizer = torch.optim.AdamW(ttt_params, lr=ttt_lr, weight_decay=0.0, betas=(0.9, 0.999)) + else: + optimizer = torch.optim.SGD(ttt_params, lr=ttt_lr, momentum=ttt_momentum) + + # Polyak averaging (TTT weight EMA) for smoother scoring + use_polyak = os.environ.get("USE_POLYAK", "1") == "1" + polyak_decay = float(os.environ.get("POLYAK_DECAY", "0.998")) + if use_polyak: + polyak_state = {id(p): p.data.clone() for p in ttt_params} + if rank == 0: + print(f" Polyak averaging enabled: decay={polyak_decay}") + + t0 = time.perf_counter() + + for ci in range(num_chunks): + windows = chunk_windows[ci] + if not windows: + continue + + # --- Phase 1: SCORE this chunk (inference_mode, no grad) --- + my_s = (len(windows) * rank) // world_size + my_e = (len(windows) * (rank + 1)) // world_size + my_windows = windows[my_s:my_e] + + # Swap in Polyak-averaged weights for scoring + if use_polyak and ci > 0: + _saved_weights = {} + for p in ttt_params: + _saved_weights[id(p)] = p.data.clone() + p.data.copy_(polyak_state[id(p)]) + + base_model.eval() + with torch.inference_mode(): + for bi in range(0, len(my_windows), batch_seqs): + batch_ws = my_windows[bi:bi + batch_seqs] + bsz = len(batch_ws) + x_batch = torch.zeros(bsz, seq_len, dtype=torch.int64, device=device) + y_batch = torch.zeros(bsz, seq_len, dtype=torch.int64, device=device) + wlens: list[int] = [] + for i, ws in enumerate(batch_ws): + end = min(ws + seq_len, total_tokens) + wlen = end - ws + wlens.append(wlen) + chunk_tok = val_tokens[ws:end + 1].to(dtype=torch.int64, device=device) + x_batch[i, :wlen] = chunk_tok[:-1] + y_batch[i, :wlen] = chunk_tok[1:] + with torch.autocast(device_type="cuda", dtype=torch.bfloat16): + logits = base_model.forward_logits(x_batch) + logits_scaled = logits.float() / ttt_temp + + # Adaptive temperature: sharpen confident predictions more + if ttt_temp != 1.0: + with torch.no_grad(): + probs_for_entropy = F.softmax(logits.float(), dim=-1) + token_entropy = -(probs_for_entropy * (probs_for_entropy + 1e-10).log()).sum(-1) + max_ent = math.log(logits.size(-1)) + # Confident tokens (low entropy) get more sharpening + adaptive_temp = 1.0 - (1.0 - ttt_temp) * (1.0 - token_entropy / max_ent) + adaptive_temp = adaptive_temp.clamp(min=0.9, max=1.05) + logits_scaled = logits.float() / adaptive_temp.unsqueeze(-1) + + # Logistic context mixing (GPU-vectorized) or plain CE + if mixer is not None: + nll = mixer.mix_and_score(logits_scaled, x_batch, y_batch, wlens) + mixer.update_weights(logits_scaled, x_batch, y_batch, wlens) + else: + nll = F.cross_entropy( + logits_scaled.reshape(-1, logits_scaled.size(-1)), + y_batch.reshape(-1), reduction="none", + ).reshape(bsz, seq_len) + for i, ws in enumerate(batch_ws): + wlen = wlens[i] + s = 0 if ws == 0 else max(wlen - stride, 0) + scored_nll = nll[i, s:wlen].to(torch.float64) + loss_sum += scored_nll.sum() + token_count += float(wlen - s) + tgt, prev = y_batch[i, s:wlen], x_batch[i, s:wlen] + tb = base_bytes_lut[tgt].to(torch.float64) + tb += (has_leading_space_lut[tgt] & ~is_boundary_token_lut[prev]).to(torch.float64) + byte_count += tb.sum() + + # --- Update context mixer with scored chunk tokens (GPU-vectorized) --- + chunk_start_tok = ci * ttt_chunk_tokens + chunk_end_tok = min((ci + 1) * ttt_chunk_tokens, total_tokens) + if mixer is not None: + mixer.update(val_tokens[chunk_start_tok:chunk_end_tok + 1]) + + # Swap back training weights after scoring + if use_polyak and ci > 0: + for p in ttt_params: + p.data.copy_(_saved_weights[id(p)]) + + # --- Phase 2: TRAIN on this chunk (already scored = legal) --- + is_last_chunk = (ci == num_chunks - 1) + if not is_last_chunk and ttt_epochs > 0: + chunk_start = ci * ttt_chunk_tokens + chunk_end = min((ci + 1) * ttt_chunk_tokens, total_tokens) + chunk_seqs = (chunk_end - chunk_start) // seq_len + if rank == 0 and ci < 3: + print(f" ttt_train [{ci+1}] seqs={chunk_seqs} start_train...", flush=True) + if chunk_seqs > 0: + # Cosine LR across chunks + adaptive scaling + cos_lr = ttt_lr * 0.5 * (1.0 + math.cos(math.pi * ci / max(num_chunks - 1, 1))) + if adaptive_lr: + # Increase LR as we've seen more data (more confident adaptation) + progress = min(ci / max(num_chunks * 0.3, 1), 1.0) # ramp over first 30% of chunks + lr_mult = 1.0 + (adaptive_lr_max_mult - 1.0) * progress + cos_lr = cos_lr * lr_mult + for pg in optimizer.param_groups: + pg["lr"] = cos_lr + my_seq_s = (chunk_seqs * rank) // world_size + my_seq_e = (chunk_seqs * (rank + 1)) // world_size + my_chunk_seqs = my_seq_e - my_seq_s + for _ep in range(ttt_epochs): + if rank == 0 and ci < 3: + print(f" ttt_train [{ci+1}] epoch={_ep+1}/{ttt_epochs} batches={my_chunk_seqs} ...", flush=True) + for bs in range(0, my_chunk_seqs, batch_seqs): + be = min(bs + batch_seqs, my_chunk_seqs) + actual_bs = my_seq_s + bs + start_tok = chunk_start + actual_bs * seq_len + end_tok = chunk_start + (my_seq_s + be) * seq_len + 1 + if end_tok > val_tokens.numel(): + continue + local = val_tokens[start_tok:end_tok].to(device=device, dtype=torch.int64) + x = local[:-1].reshape(-1, seq_len) + y = local[1:].reshape(-1, seq_len) + optimizer.zero_grad(set_to_none=True) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16): + if byte_weighted_ttt: + # Byte-weighted loss: tokens covering more bytes matter more + ttt_logits = base_model.forward_logits(x) + per_token_loss = F.cross_entropy( + ttt_logits.reshape(-1, ttt_logits.size(-1)), + y.reshape(-1), reduction='none' + ).reshape(y.shape) + byte_weights = base_bytes_lut[y].float() + byte_weights = byte_weights + (has_leading_space_lut[y] & ~is_boundary_token_lut[x]).float() + ttt_loss = (per_token_loss * byte_weights).sum() / byte_weights.sum() + else: + ttt_loss = base_model(x, y) + ttt_loss.backward() + if world_size > 1: + for p in ttt_params: + if p.grad is not None: + dist.all_reduce(p.grad, op=dist.ReduceOp.AVG) + torch.nn.utils.clip_grad_norm_(ttt_params, 1.0) + optimizer.step() + # Update Polyak EMA after each step + if use_polyak: + for p in ttt_params: + polyak_state[id(p)].lerp_(p.data, 1.0 - polyak_decay) + if rank == 0 and ci < 3: + print(f" step done ep={_ep+1} bs={bs} loss={ttt_loss.item():.4f}", flush=True) + + if rank == 0 and (ci % 10 == 0 or ci == num_chunks - 1 or ci < 5): + elapsed = time.perf_counter() - t0 + rl = loss_sum.item() / max(token_count.item(), 1) + rbpb = rl / math.log(2.0) * (token_count.item() / max(byte_count.item(), 1)) if token_count.item() > 0 else 0.0 + print(f" ttt_chunk [{ci+1}/{num_chunks}] bpb={rbpb:.6f} time={elapsed:.1f}s", flush=True) + + if dist.is_available() and dist.is_initialized(): + dist.all_reduce(loss_sum, op=dist.ReduceOp.SUM) + dist.all_reduce(token_count, op=dist.ReduceOp.SUM) + dist.all_reduce(byte_count, op=dist.ReduceOp.SUM) + + val_loss = (loss_sum / token_count).item() + val_bpb = val_loss / math.log(2.0) * (token_count.item() / byte_count.item()) + + for p in base_model.parameters(): + p.requires_grad_(True) + base_model.eval() + + if rank == 0: + print(f"ttt:done val_loss={val_loss:.6f} val_bpb={val_bpb:.6f} " + f"elapsed={time.perf_counter() - t0:.1f}s") + return val_loss, val_bpb + +def _classify_param(name: str) -> str: + if "tok_emb" in name or "lm_head" in name: + return "embed" + if ".mlp." in name: + return "mlp" + if ".attn." in name or (".proj." in name and ".mlp." not in name): + return "attn" + return "other" + +def quantize_int6_per_row(t: Tensor, clip_range: int = 15) -> tuple[Tensor, Tensor]: + t32 = t.float() + if t32.ndim == 2: + best_q, best_s, best_err = None, None, float('inf') + for pct in [0.9990, 0.9995, 0.9999, 0.99999, 1.0]: + if pct < 1.0: + row_clip = torch.quantile(t32.abs(), pct, dim=1) + else: + row_clip = t32.abs().amax(dim=1) + s = (row_clip / clip_range).clamp_min(1.0 / clip_range).to(torch.float16) + q = torch.clamp(torch.round(t32 / s.float()[:, None]), -clip_range, clip_range).to(torch.int8) + recon = q.float() * s.float()[:, None] + err = (t32 - recon).pow(2).mean().item() + if err < best_err: + best_q, best_s, best_err = q, s, err + return best_q, best_s + amax = t32.abs().max().item() + scale = torch.tensor(amax / clip_range if amax > 0 else 1.0, dtype=torch.float16) + q = torch.clamp(torch.round(t32 / scale.float()), -clip_range, clip_range).to(torch.int8) + return q, scale + + +def _find_best_row_scales(W: Tensor, clip_range: int = 15) -> Tensor: + """Find optimal per-row scales by searching percentile clipping thresholds.""" + t32 = W.float() + best_s = t32.abs().amax(dim=1) / clip_range + best_s = best_s.clamp_min(1.0 / clip_range) + best_err = torch.full((t32.shape[0],), float('inf')) + for pct in [0.9990, 0.9995, 0.9999, 0.99999, 1.0]: + if pct < 1.0: + row_clip = torch.quantile(t32.abs(), pct, dim=1) + else: + row_clip = t32.abs().amax(dim=1) + s = (row_clip / clip_range).clamp_min(1.0 / clip_range) + q = torch.clamp(torch.round(t32 / s[:, None]), -clip_range, clip_range) + recon = q * s[:, None] + err = (t32 - recon).pow(2).mean(dim=1) + improved = err < best_err + best_s[improved] = s[improved] + best_err[improved] = err[improved] + return best_s + +def gptq_quantize_weight(W: Tensor, H: Tensor, clip_range: int = 15, + block_size: int = 128, percdamp: float = 0.01) -> tuple[Tensor, Tensor]: + """GPTQ: quantize weight matrix W using Hessian H = X^T X for error compensation.""" + W = W.float().clone() + rows, cols = W.shape + row_scale = _find_best_row_scales(W, clip_range) + H = H.float().clone() + damp = percdamp * H.diag().mean() + H.diagonal().add_(damp) + perm = torch.argsort(H.diag()) + invperm = torch.argsort(perm) + W = W[:, perm] + H = H[perm][:, perm] + try: + L = torch.linalg.cholesky(H) + Hinv = torch.cholesky_inverse(L) + except torch._C._LinAlgError: + Hinv = torch.diag(1.0 / H.diag().clamp_min(1e-6)) + Q = torch.zeros(rows, cols, dtype=torch.int8) + for i1 in range(0, cols, block_size): + i2 = min(i1 + block_size, cols) + W_block = W[:, i1:i2].clone() + Hinv_block = Hinv[i1:i2, i1:i2] + Err = torch.zeros_like(W_block) + for j in range(i2 - i1): + w_col = W_block[:, j] + h_inv_jj = Hinv_block[j, j].clamp_min(1e-8) + q_col = torch.clamp(torch.round(w_col / row_scale), -clip_range, clip_range) + deq_col = q_col * row_scale + Q[:, i1 + j] = q_col.to(torch.int8) + err = (w_col - deq_col) / h_inv_jj + Err[:, j] = err + if j + 1 < i2 - i1: + W_block[:, j + 1:] -= err.unsqueeze(1) * Hinv_block[j, j + 1:].unsqueeze(0) + if i2 < cols: + W[:, i2:] -= Err @ Hinv[i1:i2, i2:] + Q = Q[:, invperm] + return Q, row_scale.to(torch.float16) + +def gptq_calibrate(model: nn.Module, train_pattern: str, device: torch.device, + n_samples: int = 256, seq_len: int = 2048) -> dict[str, Tensor]: + """Collect Hessian H = X^T X for each linear layer using training data.""" + hessians: dict[str, Tensor] = {} + n_seen: dict[str, int] = {} + hooks = [] + def make_hook(name: str): + def hook_fn(module, inp, out): + x = inp[0].detach().float() + if x.ndim == 3: + x = x.reshape(-1, x.shape[-1]) + if name not in hessians: + hessians[name] = torch.zeros(x.shape[1], x.shape[1], device=x.device, dtype=torch.float32) + n_seen[name] = 0 + hessians[name].addmm_(x.t(), x) + n_seen[name] += x.shape[0] + return hook_fn + for name, module in model.named_modules(): + if isinstance(module, (nn.Linear, CastedLinear)): + hooks.append(module.register_forward_hook(make_hook(name))) + stream = TokenStream(train_pattern) + model.eval() + with torch.no_grad(): + for _ in range(n_samples): + tokens = stream.take(seq_len + 1).to(device=device, dtype=torch.int64) + x = tokens[:-1].unsqueeze(0) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16): + model.forward_logits(x) + for h in hooks: + h.remove() + for name in hessians: + hessians[name] /= max(n_seen[name], 1) + return hessians + +def _get_layer_clip_range(name: str, num_layers: int, int6_last_n: int) -> int: + """Return clip_range based on which layer the param belongs to.""" + import re + m = re.search(r'blocks\.(\d+)\.', name) + if m: + layer_idx = int(m.group(1)) + if layer_idx >= num_layers - int6_last_n: + return 31 # int6 + return 15 # int5 + +def mixed_quantize_int6_gptq(state_dict: dict[str, Tensor], int6_cats: set[str], + hessians: dict[str, Tensor], + num_layers: int = 11, int6_last_n: int = 2) -> tuple[dict, dict]: + """GPTQ quantization with mixed int5/int6 precision. int6 for last int6_last_n layers, int5 for rest.""" + result: dict[str, Tensor] = {} + meta: dict[str, object] = {} + gptq_count, naive_count = 0, 0 + int5_params, int6_params = 0, 0 + for name, tensor in state_dict.items(): + t = tensor.detach().cpu().contiguous() + cat = _classify_param(name) + if not t.is_floating_point() or t.numel() <= 65536: + result[name] = t.to(torch.float16) if t.is_floating_point() else t + meta[name] = "passthrough" + continue + if any(p in name for p in CONTROL_TENSOR_NAME_PATTERNS): + result[name] = t.float() + meta[name] = "passthrough_ctrl" + continue + cr = _get_layer_clip_range(name, num_layers, int6_last_n) + if cr == 31: + int6_params += t.numel() + else: + int5_params += t.numel() + if cat in int6_cats and t.ndim == 2: + module_name = name.rsplit(".weight", 1)[0] if name.endswith(".weight") else name + H = hessians.get(module_name) + if H is not None and H.shape[0] == t.shape[1]: + q, s = gptq_quantize_weight(t, H.cpu(), clip_range=cr) + gptq_count += 1 + else: + q, s = quantize_int6_per_row(t, clip_range=cr) + naive_count += 1 + result[name + ".q"] = q + result[name + ".scale"] = s + meta[name] = {"type": f"int{'6' if cr == 31 else '5'}"} + elif cat in int6_cats and t.ndim >= 1: + q, s = quantize_int6_per_row(t, clip_range=cr) + result[name + ".q"] = q + result[name + ".scale"] = s + meta[name] = {"type": f"int{'6' if cr == 31 else '5'}"} + naive_count += 1 + else: + q, s = quantize_float_tensor(t) + result[name + ".q"] = q + result[name + ".scale"] = s + meta[name] = {"type": "int8"} + print(f"gptq_quantize: {gptq_count} GPTQ layers, {naive_count} naive layers", flush=True) + print(f"mixed_precision: {int5_params} int5 params, {int6_params} int6 params", flush=True) + return result, meta + + +def mixed_quantize_int6(state_dict: dict[str, Tensor], int6_cats: set[str]): + result: dict[str, Tensor] = {} + meta: dict[str, object] = {} + for name, tensor in state_dict.items(): + t = tensor.detach().cpu().contiguous() + cat = _classify_param(name) + if not t.is_floating_point() or t.numel() <= 65536: + result[name] = t.to(torch.float16) if t.is_floating_point() else t + meta[name] = "passthrough" + continue + if any(p in name for p in CONTROL_TENSOR_NAME_PATTERNS): + result[name] = t.float() + meta[name] = "passthrough_ctrl" + continue + if cat in int6_cats and t.ndim >= 1: + q, s = quantize_int6_per_row(t) + result[name + ".q"] = q + result[name + ".scale"] = s + meta[name] = {"type": "int6"} + else: + q, s = quantize_float_tensor(t) + result[name + ".q"] = q + result[name + ".scale"] = s + meta[name] = {"type": "int8"} + return result, meta + +def dequantize_mixed_int6(result: dict[str, Tensor], meta: dict[str, object], + template_sd: dict[str, Tensor]) -> dict[str, Tensor]: + out: dict[str, Tensor] = {} + for name, orig in template_sd.items(): + info = meta.get(name) + if info is None: + continue + orig_dtype = orig.dtype + if info in ("passthrough", "passthrough_ctrl", "passthrough_fp16"): + t = result[name] + if t.dtype == torch.float16 and orig_dtype in (torch.float32, torch.bfloat16): + t = t.to(orig_dtype) + out[name] = t + continue + q, s = result[name + ".q"], result[name + ".scale"] + if s.ndim > 0: + out[name] = (q.float() * s.float().view(q.shape[0], *([1] * (q.ndim - 1)))).to(orig_dtype) + else: + out[name] = (q.float() * float(s.item())).to(orig_dtype) + return out + +def main() -> None: + global zeropower_via_newtonschulz5 + code = Path(__file__).read_text(encoding="utf-8") + args = Hyperparameters() + zeropower_via_newtonschulz5 = torch.compile(zeropower_via_newtonschulz5) + distributed = "RANK" in os.environ and "WORLD_SIZE" in os.environ + rank = int(os.environ.get("RANK", "0")) + world_size = int(os.environ.get("WORLD_SIZE", "1")) + local_rank = int(os.environ.get("LOCAL_RANK", "0")) + if world_size <= 0: + raise ValueError(f"WORLD_SIZE must be positive, got {world_size}") + if 8 % world_size != 0: + raise ValueError(f"WORLD_SIZE={world_size} must divide 8 so grad_accum_steps stays integral") + grad_accum_steps = 8 // world_size + grad_scale = 1.0 / grad_accum_steps + if not torch.cuda.is_available(): + raise RuntimeError("CUDA is required") + device = torch.device("cuda", local_rank) + torch.cuda.set_device(device) + if distributed: + dist.init_process_group(backend="nccl", device_id=device) + dist.barrier() + master_process = rank == 0 + torch.backends.cuda.matmul.allow_tf32 = True + torch.backends.cudnn.allow_tf32 = True + from torch.backends.cuda import enable_cudnn_sdp, enable_flash_sdp, enable_math_sdp, enable_mem_efficient_sdp + enable_cudnn_sdp(False) + enable_flash_sdp(True) + enable_mem_efficient_sdp(False) + enable_math_sdp(False) + logfile = None + if master_process: + os.makedirs("logs", exist_ok=True) + logfile = f"logs/{args.run_id}.txt" + print(logfile) + + def log0(msg: str, console: bool = True) -> None: + if not master_process: + return + if console: + print(msg) + if logfile is not None: + with open(logfile, "a", encoding="utf-8") as f: + print(msg, file=f) + log0(code, console=False) + log0(f"Python {sys.version} PyTorch {torch.__version__}", console=False) + random.seed(args.seed) + np.random.seed(args.seed) + torch.manual_seed(args.seed) + torch.cuda.manual_seed_all(args.seed) + if not args.tokenizer_path.endswith(".model"): + raise ValueError(f"Script only setup for SentencePiece .model file: {args.tokenizer_path}") + sp = spm.SentencePieceProcessor(model_file=args.tokenizer_path) + if int(sp.vocab_size()) != args.vocab_size: + raise ValueError( + f"VOCAB_SIZE={args.vocab_size} does not match tokenizer vocab_size={int(sp.vocab_size())}" + ) + dataset_dir = Path(args.data_path).resolve() + actual_train_files = len(list(dataset_dir.glob("fineweb_train_*.bin"))) + effective_eval_seq_len = args.eval_seq_len if args.eval_seq_len > 0 else args.train_seq_len + val_seq_len = max(args.train_seq_len, effective_eval_seq_len) + val_tokens = load_validation_tokens(args.val_files, val_seq_len) + base_bytes_lut, has_leading_space_lut, is_boundary_token_lut = build_sentencepiece_luts( + sp, args.vocab_size, device + ) + log0(f"val_bpb:enabled tokenizer_kind=sentencepiece tokenizer_path={args.tokenizer_path}") + log0(f"train_loader:dataset:{dataset_dir.name} train_shards:{actual_train_files}") + log0(f"val_loader:shards pattern={args.val_files} tokens:{val_tokens.numel() - 1}") + CastedLinear._qat_enabled = args.qat_enabled + base_model = GPT( + vocab_size=args.vocab_size, num_layers=args.num_layers, model_dim=args.model_dim, + num_heads=args.num_heads, num_kv_heads=args.num_kv_heads, mlp_mult=args.mlp_mult, + tie_embeddings=args.tie_embeddings, tied_embed_init_std=args.tied_embed_init_std, + logit_softcap=args.logit_softcap, rope_base=args.rope_base, qk_gain_init=args.qk_gain_init, + bigram_vocab_size=args.bigram_vocab_size, bigram_dim=args.bigram_dim, + xsa_last_n=args.xsa_last_n, rope_dims=args.rope_dims, ln_scale=args.ln_scale, + dtg=args.dtg_enabled, ve_enabled=args.ve_enabled, ve_dim=args.ve_dim, ve_layers=args.ve_layers, + ).to(device).bfloat16() + for module in base_model.modules(): + if isinstance(module, CastedLinear): + module.float() + restore_low_dim_params_to_fp32(base_model) + compiled_model = torch.compile(base_model, dynamic=False, fullgraph=True) + model: nn.Module = DDP(compiled_model, device_ids=[local_rank], broadcast_buffers=False) if distributed else compiled_model + block_named_params = list(base_model.blocks.named_parameters()) + matrix_params = [ + p + for name, p in block_named_params + if p.ndim == 2 and not any(pattern in name for pattern in CONTROL_TENSOR_NAME_PATTERNS) + ] + scalar_params = [ + p + for name, p in block_named_params + if p.ndim < 2 or any(pattern in name for pattern in CONTROL_TENSOR_NAME_PATTERNS) + ] + if base_model.skip_weights.numel() > 0: + scalar_params.append(base_model.skip_weights) + scalar_params.append(base_model.smear.gate) + if base_model.bigram is not None: + scalar_params.append(base_model.bigram.scale) + token_lr = args.tied_embed_lr if args.tie_embeddings else args.embed_lr + tok_params = [{"params": [base_model.tok_emb.weight], "lr": token_lr, "base_lr": token_lr}] + if base_model.bigram is not None: + tok_params.append({"params": [base_model.bigram.embed.weight], "lr": token_lr, "base_lr": token_lr}) + if base_model.bigram.proj is not None: + matrix_params.append(base_model.bigram.proj.weight) + if base_model.ve_shared is not None: + tok_params.append({"params": [base_model.ve_shared.embed.weight], "lr": token_lr, "base_lr": token_lr}) + if base_model.ve_shared.proj is not None: + matrix_params.append(base_model.ve_shared.proj.weight) + scalar_params.append(base_model.ve_shared.scale) + for s in base_model.ve_layer_scales: + scalar_params.append(s) + optimizer_tok = torch.optim.AdamW( + tok_params, + betas=(args.beta1, args.beta2), + eps=args.adam_eps, + weight_decay=args.adam_wd, + fused=True, + ) + optimizer_muon = Muon( + matrix_params, + lr=args.matrix_lr, + momentum=args.muon_momentum, + backend_steps=args.muon_backend_steps, + weight_decay=args.muon_wd, + ) + for group in optimizer_muon.param_groups: + group["base_lr"] = args.matrix_lr + optimizer_scalar = torch.optim.AdamW( + [{"params": scalar_params, "lr": args.scalar_lr, "base_lr": args.scalar_lr}], + betas=(args.beta1, args.beta2), + eps=args.adam_eps, + weight_decay=args.adam_wd, + fused=True, + ) + optimizers: list[torch.optim.Optimizer] = [optimizer_tok, optimizer_muon, optimizer_scalar] + if base_model.lm_head is not None: + optimizer_head = torch.optim.Adam( + [{"params": [base_model.lm_head.weight], "lr": args.head_lr, "base_lr": args.head_lr}], + betas=(args.beta1, args.beta2), + eps=args.adam_eps, + fused=True, + ) + optimizers.insert(1, optimizer_head) + n_params = sum(p.numel() for p in base_model.parameters()) + # Set int6 clip_range for last N layers (mixed precision) + int6_start = args.num_layers - args.int6_last_n + for i, block in enumerate(base_model.blocks): + if i >= int6_start: + for m in block.modules(): + if isinstance(m, CastedLinear): + m._clip_range = 31 # int6 + if master_process: + int5_count = sum(1 for m in base_model.modules() if isinstance(m, CastedLinear) and m._clip_range == 15) + int6_count = sum(1 for m in base_model.modules() if isinstance(m, CastedLinear) and m._clip_range == 31) + log0(f"mixed_precision: {int5_count} int5 layers, {int6_count} int6 layers (last {args.int6_last_n} blocks)") + log0(f"model_params:{n_params}") + xsa_layers = [i for i, b in enumerate(base_model.blocks) if b.attn.use_xsa] + log0(f"XSA:{xsa_layers} ws:{world_size} gqa:{args.num_heads}/{args.num_kv_heads}") + log0(f"lr:embed={token_lr} matrix={args.matrix_lr} scalar={args.scalar_lr} batch:{args.train_batch_tokens} wall:{args.max_wallclock_seconds:.0f}s seed:{args.seed}") + train_loader = DistributedTokenLoader(args.train_files, rank, world_size, device) + def zero_grad_all() -> None: + for opt in optimizers: + opt.zero_grad(set_to_none=True) + max_wallclock_ms = 1000.0 * args.max_wallclock_seconds if args.max_wallclock_seconds > 0 else None + + def lr_mul(step: int, elapsed_ms: float) -> float: + if args.warmdown_iters <= 0: + return 1.0 + if max_wallclock_ms is None: + warmdown_start = max(args.iterations - args.warmdown_iters, 0) + return max((args.iterations - step) / max(args.warmdown_iters, 1), 0.0) if warmdown_start <= step < args.iterations else 1.0 + step_ms = elapsed_ms / max(step, 1) + warmdown_ms = args.warmdown_iters * step_ms + remaining_ms = max(max_wallclock_ms - elapsed_ms, 0.0) + return remaining_ms / max(warmdown_ms, 1e-9) if remaining_ms <= warmdown_ms else 1.0 + # TTT_ONLY mode: skip training, load saved model, run TTT eval + if os.environ.get("TTT_ONLY", "0") == "1": + log0("TTT_ONLY mode: skipping training, loading saved model...") + sd_cpu = {k: v.cpu() for k, v in torch.load("final_model.pt", map_location="cpu").items()} + if args.prune_pct > 0: + for k, v in sd_cpu.items(): + if v.ndim == 2 and v.numel() > 65536: + thresh = torch.quantile(v.abs().float(), args.prune_pct) + v[v.abs() < thresh] = 0.0 + log0(f"pruning:{args.prune_pct*100:.1f}% magnitude pruning applied") + with open("final_model.int6.ptz", "rb") as f: + quant_blob_disk = f.read() + quant_state = torch.load( + io.BytesIO(zstandard.ZstdDecompressor().decompress(quant_blob_disk) if _COMPRESSOR == "zstd" else zlib.decompress(quant_blob_disk)), + map_location="cpu", + ) + deq_state = dequantize_mixed_int6(quant_state["w"], quant_state["m"], sd_cpu) + eval_model = GPT( + vocab_size=args.vocab_size, num_layers=args.num_layers, model_dim=args.model_dim, + num_heads=args.num_heads, num_kv_heads=args.num_kv_heads, mlp_mult=args.mlp_mult, + tie_embeddings=args.tie_embeddings, tied_embed_init_std=args.tied_embed_init_std, + logit_softcap=args.logit_softcap, rope_base=args.rope_base, qk_gain_init=args.qk_gain_init, + bigram_vocab_size=args.bigram_vocab_size, bigram_dim=args.bigram_dim, xsa_last_n=args.xsa_last_n, + rope_dims=args.rope_dims, ln_scale=args.ln_scale, dtg=args.dtg_enabled, + ve_enabled=args.ve_enabled, ve_dim=args.ve_dim, ve_layers=args.ve_layers, + ).to(device).bfloat16() + for m in eval_model.modules(): + if isinstance(m, CastedLinear): + m.float() + restore_low_dim_params_to_fp32(eval_model) + eval_model.load_state_dict(deq_state, strict=True) + sw_seq_len = int(os.environ.get("EVAL_SEQ_LEN", str(effective_eval_seq_len))) + log0(f"TTT_ONLY: model loaded, starting TTT eval...") + torch.cuda.synchronize() + t_ttt = time.perf_counter() + ttt_epochs = int(os.environ.get("TTT_EPOCHS", "3")) + ttt_lr = float(os.environ.get("TTT_LR", "0.0005")) + ttt_freeze = int(os.environ.get("TTT_FREEZE_BLOCKS", "2")) + ttt_chunk = int(os.environ.get("TTT_CHUNK_TOKENS", "32768")) + ttt_opt = os.environ.get("TTT_OPTIMIZER", "adamw") + log0(f"TTT: epochs={ttt_epochs} lr={ttt_lr} freeze_first={ttt_freeze} chunk={ttt_chunk} opt={ttt_opt}") + ttt_temp = args.ttt_temperature + log0(f"TTT temperature: {ttt_temp}") + ttt_val_loss, ttt_val_bpb = eval_val_sliding_ttt( + args, eval_model, rank, world_size, device, + val_tokens, base_bytes_lut, has_leading_space_lut, is_boundary_token_lut, + stride=args.eval_stride, ttt_epochs=ttt_epochs, ttt_lr=ttt_lr, + ttt_freeze_blocks=ttt_freeze, eval_seq_len=sw_seq_len, + ttt_chunk_tokens=ttt_chunk, ttt_optimizer=ttt_opt, + ttt_temp=ttt_temp, + ppm_alpha=float(os.environ.get("PPM_ALPHA", "0.85")), + byte_weighted_ttt=os.environ.get("BYTE_WEIGHTED_TTT", "1") == "1", + use_cache=os.environ.get("USE_CACHE", "1") == "1", + cache_alpha=float(os.environ.get("CACHE_ALPHA", "0.3")), + adaptive_lr=os.environ.get("ADAPTIVE_LR", "1") == "1", + adaptive_lr_max_mult=float(os.environ.get("ADAPTIVE_LR_MAX", "3.0")), + ) + torch.cuda.synchronize() + log0( + f"final_int6_ttt val_loss:{ttt_val_loss:.4f} val_bpb:{ttt_val_bpb:.4f} " + f"stride:{args.eval_stride} eval_time:{1000.0 * (time.perf_counter() - t_ttt):.0f}ms" + ) + log0(f"final_int6_ttt_exact val_loss:{ttt_val_loss:.8f} val_bpb:{ttt_val_bpb:.8f}") + if distributed: + dist.destroy_process_group() + return + + if args.warmup_steps > 0: + initial_model_state = {name: tensor.detach().cpu().clone() for name, tensor in base_model.state_dict().items()} + initial_optimizer_states = [copy.deepcopy(opt.state_dict()) for opt in optimizers] + model.train() + for warmup_step in range(args.warmup_steps): + zero_grad_all() + for micro_step in range(grad_accum_steps): + if distributed: + model.require_backward_grad_sync = micro_step == grad_accum_steps - 1 + x, y = train_loader.next_batch(args.train_batch_tokens, args.train_seq_len, grad_accum_steps) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16, enabled=True): + warmup_loss = model(x, y) + (warmup_loss * grad_scale).backward() + for opt in optimizers: + opt.step() + zero_grad_all() + if args.warmup_steps <= 20 or (warmup_step + 1) % 10 == 0 or warmup_step + 1 == args.warmup_steps: + log0(f"warmup_step:{warmup_step + 1}/{args.warmup_steps}") + base_model.load_state_dict(initial_model_state, strict=True) + for opt, state in zip(optimizers, initial_optimizer_states, strict=True): + opt.load_state_dict(state) + zero_grad_all() + if distributed: + model.require_backward_grad_sync = True + train_loader = DistributedTokenLoader(args.train_files, rank, world_size, device) + swa_state: dict[str, Tensor] | None = None + swa_count = 0 + ema_state = {name: t.detach().float().clone() for name, t in base_model.state_dict().items()} + ema_decay = 0.997 + training_time_ms = 0.0 + stop_after_step: int | None = None + torch.cuda.synchronize() + t0 = time.perf_counter() + step = 0 + while True: + last_step = step == args.iterations or (stop_after_step is not None and step >= stop_after_step) + should_validate = last_step or (args.val_loss_every > 0 and step % args.val_loss_every == 0) + if should_validate: + torch.cuda.synchronize() + training_time_ms += 1000.0 * (time.perf_counter() - t0) + val_loss, val_bpb = eval_val( + args, + model, + rank, + world_size, + device, + grad_accum_steps, + val_tokens, + base_bytes_lut, + has_leading_space_lut, + is_boundary_token_lut, + ) + log0( + f"step:{step}/{args.iterations} val_loss:{val_loss:.4f} val_bpb:{val_bpb:.4f} " + f"train_time:{training_time_ms:.0f}ms step_avg:{training_time_ms / max(step, 1):.2f}ms" + ) + torch.cuda.synchronize() + t0 = time.perf_counter() + if last_step: + if stop_after_step is not None and step < args.iterations: + log0( + f"stopping_early: wallclock_cap train_time:{training_time_ms:.0f}ms " + f"step:{step}/{args.iterations}" + ) + break + elapsed_ms = training_time_ms + 1000.0 * (time.perf_counter() - t0) + scale = lr_mul(step, elapsed_ms) + # Anneal soft-round alpha based on QAT progress + if CastedLinear._use_soft_round and CastedLinear._qat_enabled: + qat_progress = max(0.0, 1.0 - scale / max(args.late_qat_threshold, 0.01)) + CastedLinear._soft_round_alpha = 1.0 + 15.0 * qat_progress + if args.late_qat_threshold > 0 and scale < args.late_qat_threshold and not CastedLinear._qat_enabled: + CastedLinear._qat_enabled = True + CastedLinear._use_soft_round = os.environ.get("SOFT_ROUND_QAT", "0") == "1" + if CastedLinear._use_soft_round and master_process: + log0(f"soft_round_qat:enabled initial_alpha=1.0") + log0(f"late_qat:enabled step:{step} scale:{scale:.4f}") + zero_grad_all() + train_loss = torch.zeros((), device=device) + for micro_step in range(grad_accum_steps): + if distributed: + model.require_backward_grad_sync = micro_step == grad_accum_steps - 1 + x, y = train_loader.next_batch(args.train_batch_tokens, args.train_seq_len, grad_accum_steps) + with torch.autocast(device_type="cuda", dtype=torch.bfloat16, enabled=True): + loss = model(x, y) + train_loss += loss.detach() + (loss * grad_scale).backward() + train_loss /= grad_accum_steps + frac = min(step / args.muon_momentum_warmup_steps, 1.0) if args.muon_momentum_warmup_steps > 0 else 1.0 + muon_momentum = (1 - frac) * args.muon_momentum_warmup_start + frac * args.muon_momentum + for group in optimizer_muon.param_groups: + group["momentum"] = muon_momentum + for opt in optimizers: + for group in opt.param_groups: + group["lr"] = group["base_lr"] * scale + if args.grad_clip_norm > 0: + torch.nn.utils.clip_grad_norm_(base_model.parameters(), args.grad_clip_norm) + for opt in optimizers: + opt.step() + zero_grad_all() + with torch.no_grad(): + for name, t in base_model.state_dict().items(): + ema_state[name].mul_(ema_decay).add_(t.detach().float(), alpha=1.0 - ema_decay) + step += 1 + approx_training_time_ms = training_time_ms + 1000.0 * (time.perf_counter() - t0) + if args.swa_enabled and scale < 0.2 and step % args.swa_every == 0: + if swa_state is None: + swa_state = {name: t.detach().cpu().clone() for name, t in base_model.state_dict().items()} + swa_count = 1 + log0(f"swa:start step:{step}") + else: + for name, t in base_model.state_dict().items(): + swa_state[name] += t.detach().cpu() + swa_count += 1 + should_log_train = ( + args.train_log_every > 0 + and (step <= 10 or step % args.train_log_every == 0 or stop_after_step is not None) + ) + if should_log_train: + log0( + f"step:{step}/{args.iterations} train_loss:{train_loss.item():.4f} " + f"train_time:{approx_training_time_ms:.0f}ms step_avg:{approx_training_time_ms / step:.2f}ms" + ) + reached_cap = max_wallclock_ms is not None and approx_training_time_ms >= max_wallclock_ms + if distributed and max_wallclock_ms is not None: + reached_cap_tensor = torch.tensor(int(reached_cap), device=device) + dist.all_reduce(reached_cap_tensor, op=dist.ReduceOp.MAX) + reached_cap = bool(reached_cap_tensor.item()) + if stop_after_step is None and reached_cap: + stop_after_step = step + log0( + f"peak memory allocated: {torch.cuda.max_memory_allocated() // 1024 // 1024} MiB " + f"reserved: {torch.cuda.max_memory_reserved() // 1024 // 1024} MiB" + ) + raw_state = {name: t.detach().clone() for name, t in base_model.state_dict().items()} + best_bpb = float('inf') + best_label = "raw" + best_state = raw_state + log0("ema:applying EMA weights") + current_state = base_model.state_dict() + ema_sd = {name: t.to(dtype=current_state[name].dtype) for name, t in ema_state.items()} + base_model.load_state_dict(ema_sd, strict=True) + torch.cuda.synchronize() + t_diag = time.perf_counter() + ema_val_loss, ema_val_bpb = eval_val( + args, compiled_model, rank, world_size, device, grad_accum_steps, + val_tokens, base_bytes_lut, has_leading_space_lut, is_boundary_token_lut, + ) + torch.cuda.synchronize() + log0( + f"DIAGNOSTIC post_ema val_loss:{ema_val_loss:.4f} val_bpb:{ema_val_bpb:.4f} " + f"eval_time:{1000.0 * (time.perf_counter() - t_diag):.0f}ms" + ) + if ema_val_bpb < best_bpb: + best_bpb = ema_val_bpb + best_label = "ema" + best_state = {name: t.detach().clone() for name, t in base_model.state_dict().items()} + if swa_state is not None and swa_count > 0: + log0(f"swa:applying SWA weights (count={swa_count})") + swa_sd = {} + for name in current_state: + swa_avg = (swa_state[name].float() / swa_count).to(dtype=current_state[name].dtype) + swa_sd[name] = swa_avg + base_model.load_state_dict(swa_sd, strict=True) + torch.cuda.synchronize() + t_diag = time.perf_counter() + swa_val_loss, swa_val_bpb = eval_val( + args, compiled_model, rank, world_size, device, grad_accum_steps, + val_tokens, base_bytes_lut, has_leading_space_lut, is_boundary_token_lut, + ) + torch.cuda.synchronize() + log0( + f"DIAGNOSTIC post_swa val_loss:{swa_val_loss:.4f} val_bpb:{swa_val_bpb:.4f} " + f"eval_time:{1000.0 * (time.perf_counter() - t_diag):.0f}ms" + ) + if swa_val_bpb < best_bpb: + best_bpb = swa_val_bpb + best_label = "swa" + best_state = {name: t.detach().clone() for name, t in base_model.state_dict().items()} + + log0(f"best_averaging:{best_label} val_bpb:{best_bpb:.4f}") + base_model.load_state_dict(best_state, strict=True) + export_sd = base_model.state_dict() + if master_process: + torch.save(export_sd, "final_model.pt") + model_bytes = os.path.getsize("final_model.pt") + code_bytes = len(code.encode("utf-8")) + log0(f"Serialized model: {model_bytes} bytes") + log0(f"Code size: {code_bytes} bytes") + sd_cpu = {k: v.detach().cpu() for k, v in export_sd.items()} + if args.prune_pct > 0: + for k, v in sd_cpu.items(): + if v.ndim == 2 and v.numel() > 65536: + thresh = torch.quantile(v.abs().float(), args.prune_pct) + v[v.abs() < thresh] = 0.0 + if master_process: + log0(f"pruning:{args.prune_pct*100:.1f}% magnitude pruning applied") + # GPTQ calibration + log0("gptq:calibrating with training data...") + t_gptq = time.perf_counter() + gptq_hessians = gptq_calibrate(base_model, args.train_files, device, n_samples=256, seq_len=args.train_seq_len) + log0(f"gptq:calibrated {len(gptq_hessians)} layers in {time.perf_counter()-t_gptq:.1f}s") + quant_result, quant_meta = mixed_quantize_int6_gptq(sd_cpu, {"mlp", "attn"}, gptq_hessians, num_layers=args.num_layers, int6_last_n=args.int6_last_n) + quant_buf = io.BytesIO() + torch.save({"w": quant_result, "m": quant_meta}, quant_buf) + quant_raw = quant_buf.getvalue() + quant_blob = zstandard.ZstdCompressor(level=22).compress(quant_raw) if _COMPRESSOR == "zstd" else zlib.compress(quant_raw, 9) + if master_process: + with open("final_model.int6.ptz", "wb") as f: + f.write(quant_blob) + quant_file_bytes = len(quant_blob) + code_bytes = len(code.encode("utf-8")) + log0(f"Serialized model int6+{_COMPRESSOR}: {quant_file_bytes} bytes") + log0(f"Total submission size int6+{_COMPRESSOR}: {quant_file_bytes + code_bytes} bytes") + if distributed: + dist.barrier() + with open("final_model.int6.ptz", "rb") as f: + quant_blob_disk = f.read() + quant_state = torch.load( + io.BytesIO(zstandard.ZstdDecompressor().decompress(quant_blob_disk) if _COMPRESSOR == "zstd" else zlib.decompress(quant_blob_disk)), + map_location="cpu", + ) + deq_state = dequantize_mixed_int6(quant_state["w"], quant_state["m"], sd_cpu) + eval_model = GPT( + vocab_size=args.vocab_size, num_layers=args.num_layers, model_dim=args.model_dim, + num_heads=args.num_heads, num_kv_heads=args.num_kv_heads, mlp_mult=args.mlp_mult, + tie_embeddings=args.tie_embeddings, tied_embed_init_std=args.tied_embed_init_std, + logit_softcap=args.logit_softcap, rope_base=args.rope_base, qk_gain_init=args.qk_gain_init, + bigram_vocab_size=args.bigram_vocab_size, bigram_dim=args.bigram_dim, xsa_last_n=args.xsa_last_n, + rope_dims=args.rope_dims, ln_scale=args.ln_scale, dtg=args.dtg_enabled, + ve_enabled=args.ve_enabled, ve_dim=args.ve_dim, ve_layers=args.ve_layers, + ).to(device).bfloat16() + for m in eval_model.modules(): + if isinstance(m, CastedLinear): + m.float() + restore_low_dim_params_to_fp32(eval_model) + eval_model.load_state_dict(deq_state, strict=True) + sw_seq_len = int(os.environ.get("EVAL_SEQ_LEN", str(effective_eval_seq_len))) + if sw_seq_len != effective_eval_seq_len and rank == 0: + log0(f"Eval seq_len override: {effective_eval_seq_len} -> {sw_seq_len}") + if args.eval_stride > 0 and args.eval_stride < sw_seq_len and not os.environ.get("SKIP_SLIDING"): + torch.cuda.synchronize() + t_slide = time.perf_counter() + sw_val_loss, sw_val_bpb = eval_val_sliding( + args, eval_model, rank, world_size, device, + val_tokens, base_bytes_lut, has_leading_space_lut, is_boundary_token_lut, + stride=args.eval_stride, + eval_seq_len=sw_seq_len, + ) + torch.cuda.synchronize() + log0( + f"final_int6_sliding_window val_loss:{sw_val_loss:.4f} val_bpb:{sw_val_bpb:.4f} " + f"stride:{args.eval_stride} eval_time:{1000.0 * (time.perf_counter() - t_slide):.0f}ms" + ) + log0(f"final_int6_sliding_window_exact val_loss:{sw_val_loss:.8f} val_bpb:{sw_val_bpb:.8f}") + torch.cuda.synchronize() + t_ttt = time.perf_counter() + ttt_epochs = int(os.environ.get("TTT_EPOCHS", "3")) + ttt_lr = float(os.environ.get("TTT_LR", "0.0005")) + ttt_freeze = int(os.environ.get("TTT_FREEZE_BLOCKS", "2")) + ttt_chunk = int(os.environ.get("TTT_CHUNK_TOKENS", "32768")) + ttt_opt = os.environ.get("TTT_OPTIMIZER", "adamw") + log0(f"TTT: epochs={ttt_epochs} lr={ttt_lr} freeze_first={ttt_freeze} chunk={ttt_chunk} opt={ttt_opt}") + ttt_temp = args.ttt_temperature + log0(f"TTT temperature: {ttt_temp}") + ppm_alpha_val = float(os.environ.get("PPM_ALPHA", "0.85")) + bw_ttt = os.environ.get("BYTE_WEIGHTED_TTT", "1") == "1" + log0(f"PPM alpha: {ppm_alpha_val}, Byte-weighted TTT: {bw_ttt}") + ttt_val_loss, ttt_val_bpb = eval_val_sliding_ttt( + args, eval_model, rank, world_size, device, + val_tokens, base_bytes_lut, has_leading_space_lut, is_boundary_token_lut, + stride=args.eval_stride, ttt_epochs=ttt_epochs, ttt_lr=ttt_lr, + ttt_freeze_blocks=ttt_freeze, eval_seq_len=sw_seq_len, + ttt_chunk_tokens=ttt_chunk, ttt_optimizer=ttt_opt, + ttt_temp=ttt_temp, + ppm_alpha=float(os.environ.get("PPM_ALPHA", "0.85")), + byte_weighted_ttt=os.environ.get("BYTE_WEIGHTED_TTT", "1") == "1", + use_cache=os.environ.get("USE_CACHE", "1") == "1", + cache_alpha=float(os.environ.get("CACHE_ALPHA", "0.3")), + adaptive_lr=os.environ.get("ADAPTIVE_LR", "1") == "1", + adaptive_lr_max_mult=float(os.environ.get("ADAPTIVE_LR_MAX", "3.0")), + ) + torch.cuda.synchronize() + log0( + f"final_int6_ttt val_loss:{ttt_val_loss:.4f} val_bpb:{ttt_val_bpb:.4f} " + f"stride:{args.eval_stride} eval_time:{1000.0 * (time.perf_counter() - t_ttt):.0f}ms" + ) + log0(f"final_int6_ttt_exact val_loss:{ttt_val_loss:.8f} val_bpb:{ttt_val_bpb:.8f}") + if distributed: + dist.destroy_process_group() +if __name__ == "__main__": + main() diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed1337.log b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed1337.log new file mode 100644 index 0000000000..4596180df5 --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed1337.log @@ -0,0 +1,172 @@ +W0324 06:47:48.570000 94727 torch/distributed/run.py:851] +W0324 06:47:48.570000 94727 torch/distributed/run.py:851] ***************************************** +W0324 06:47:48.570000 94727 torch/distributed/run.py:851] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. +W0324 06:47:48.570000 94727 torch/distributed/run.py:851] ***************************************** +logs/0986e1a2-99db-4b93-ba13-1082fe463b5d.txt +val_bpb:enabled tokenizer_kind=sentencepiece tokenizer_path=./data/tokenizers/fineweb_1024_bpe.model +train_loader:dataset:fineweb10B_sp1024 train_shards:80 +val_loader:shards pattern=./data/datasets/fineweb10B_sp1024/fineweb_val_*.bin tokens:62021632 +mixed_precision: 68 int5 layers, 0 int6 layers (last 0 blocks) +model_params:33580124 +XSA:[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] ws:8 gqa:8/8 +lr:embed=0.035 matrix=0.025 scalar=0.025 batch:786432 wall:600s seed:1337 +warmup_step:1/20 +warmup_step:2/20 +warmup_step:3/20 +warmup_step:4/20 +warmup_step:5/20 +warmup_step:6/20 +warmup_step:7/20 +warmup_step:8/20 +warmup_step:9/20 +warmup_step:10/20 +warmup_step:11/20 +warmup_step:12/20 +warmup_step:13/20 +warmup_step:14/20 +warmup_step:15/20 +warmup_step:16/20 +warmup_step:17/20 +warmup_step:18/20 +warmup_step:19/20 +warmup_step:20/20 +step:0/20000 val_loss:6.9304 val_bpb:4.1046 train_time:0ms step_avg:0.02ms +step:1/20000 train_loss:6.9324 train_time:155ms step_avg:154.62ms +step:2/20000 train_loss:8.6499 train_time:244ms step_avg:122.18ms +step:3/20000 train_loss:7.7400 train_time:339ms step_avg:113.00ms +step:4/20000 train_loss:7.2905 train_time:434ms step_avg:108.40ms +step:5/20000 train_loss:7.0203 train_time:528ms step_avg:105.66ms +step:6/20000 train_loss:6.8351 train_time:623ms step_avg:103.87ms +step:7/20000 train_loss:6.7947 train_time:718ms step_avg:102.57ms +step:8/20000 train_loss:6.7258 train_time:812ms step_avg:101.51ms +step:9/20000 train_loss:6.4110 train_time:907ms step_avg:100.79ms +step:10/20000 train_loss:6.0618 train_time:1002ms step_avg:100.17ms +step:500/20000 train_loss:2.3545 train_time:48339ms step_avg:96.68ms +step:1000/20000 train_loss:2.2365 train_time:96843ms step_avg:96.84ms +step:1500/20000 train_loss:2.1818 train_time:145370ms step_avg:96.91ms +step:2000/20000 train_loss:2.0262 train_time:194003ms step_avg:97.00ms +step:2500/20000 train_loss:2.1279 train_time:242644ms step_avg:97.06ms +step:3000/20000 train_loss:2.1145 train_time:291318ms step_avg:97.11ms +step:3500/20000 train_loss:2.1254 train_time:340011ms step_avg:97.15ms +step:4000/20000 train_loss:1.9115 train_time:388714ms step_avg:97.18ms +step:4000/20000 val_loss:2.0024 val_bpb:1.1860 train_time:388719ms step_avg:97.18ms +soft_round_qat:enabled initial_alpha=1.0 +late_qat:enabled step:4424 scale:0.4997 +step:4500/20000 train_loss:2.0582 train_time:437424ms step_avg:97.21ms +step:5000/20000 train_loss:2.0351 train_time:486102ms step_avg:97.22ms +swa:start step:5500 +step:5500/20000 train_loss:1.9473 train_time:534768ms step_avg:97.23ms +step:6000/20000 train_loss:1.8706 train_time:583974ms step_avg:97.33ms +step:6163/20000 val_loss:1.8983 val_bpb:1.1243 train_time:600024ms step_avg:97.36ms +stopping_early: wallclock_cap train_time:600024ms step:6163/20000 +peak memory allocated: 26201 MiB reserved: 26418 MiB +ema:applying EMA weights +DIAGNOSTIC post_ema val_loss:1.8966 val_bpb:1.1233 eval_time:2368ms +swa:applying SWA weights (count=14) +DIAGNOSTIC post_swa val_loss:1.8982 val_bpb:1.1242 eval_time:2360ms +best_averaging:ema val_bpb:1.1233 +Serialized model: 130956873 bytes +Code size: 106734 bytes +pruning:2.0% magnitude pruning applied +gptq:calibrating with training data... +gptq:calibrated 68 layers in 3.6s +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +Serialized model int6+zstd: 15715344 bytes +Total submission size int6+zstd: 15822078 bytes +TTT: epochs=3 lr=0.0001 freeze_first=2 chunk=131072 opt=adamw +TTT temperature: 0.98 +PPM alpha: 1.0, Byte-weighted TTT: False +ttt:start chunks=474 chunk_tokens=131072 windows=1938176 stride=32 lr=0.0001 epochs=3 opt=adamw freeze_first=2 +ttt:params unfrozen=5780500 frozen=27799624 + ttt_train [1] seqs=64 start_train... + ttt_train [1] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=2.0755 + ttt_train [1] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=2.0637 + ttt_train [1] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=2.0631 + ttt_chunk [1/474] bpb=1.199717 time=1.3s + ttt_train [2] seqs=64 start_train... + ttt_train [2] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.9046 + ttt_train [2] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.9036 + ttt_train [2] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.9017 + ttt_chunk [2/474] bpb=1.153948 time=2.4s + ttt_train [3] seqs=64 start_train... + ttt_train [3] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.8512 + ttt_train [3] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.8502 + ttt_train [3] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.8490 + ttt_chunk [3/474] bpb=1.127169 time=3.6s + ttt_chunk [4/474] bpb=1.134789 time=4.7s + ttt_chunk [5/474] bpb=1.133690 time=5.8s + ttt_chunk [11/474] bpb=1.116604 time=12.7s + ttt_chunk [21/474] bpb=1.111760 time=24.1s + ttt_chunk [31/474] bpb=1.109901 time=35.5s + ttt_chunk [41/474] bpb=1.118054 time=46.9s + ttt_chunk [51/474] bpb=1.125284 time=58.3s + ttt_chunk [61/474] bpb=1.123258 time=69.7s + ttt_chunk [71/474] bpb=1.124623 time=81.1s + ttt_chunk [81/474] bpb=1.125042 time=92.5s + ttt_chunk [91/474] bpb=1.127019 time=103.9s + ttt_chunk [101/474] bpb=1.123588 time=115.3s + ttt_chunk [111/474] bpb=1.123831 time=126.8s + ttt_chunk [121/474] bpb=1.127096 time=138.2s + ttt_chunk [131/474] bpb=1.127790 time=149.6s + ttt_chunk [141/474] bpb=1.127537 time=161.0s + ttt_chunk [151/474] bpb=1.125756 time=172.4s + ttt_chunk [161/474] bpb=1.126665 time=183.8s + ttt_chunk [171/474] bpb=1.125481 time=195.2s + ttt_chunk [181/474] bpb=1.126243 time=206.6s + ttt_chunk [191/474] bpb=1.125132 time=218.0s + ttt_chunk [201/474] bpb=1.124308 time=229.4s + ttt_chunk [211/474] bpb=1.122924 time=240.9s + ttt_chunk [221/474] bpb=1.123005 time=252.3s + ttt_chunk [231/474] bpb=1.122391 time=263.7s + ttt_chunk [241/474] bpb=1.121305 time=275.1s + ttt_chunk [251/474] bpb=1.122402 time=286.5s + ttt_chunk [261/474] bpb=1.123029 time=297.9s + ttt_chunk [271/474] bpb=1.121517 time=309.3s + ttt_chunk [281/474] bpb=1.121123 time=320.7s + ttt_chunk [291/474] bpb=1.119558 time=332.1s + ttt_chunk [301/474] bpb=1.119987 time=343.5s + ttt_chunk [311/474] bpb=1.119381 time=354.9s + ttt_chunk [321/474] bpb=1.117767 time=366.4s + ttt_chunk [331/474] bpb=1.116735 time=377.8s + ttt_chunk [341/474] bpb=1.115996 time=389.2s + ttt_chunk [351/474] bpb=1.114351 time=400.6s + ttt_chunk [361/474] bpb=1.114833 time=412.0s + ttt_chunk [371/474] bpb=1.114520 time=423.4s + ttt_chunk [381/474] bpb=1.115285 time=434.8s + ttt_chunk [391/474] bpb=1.116303 time=446.2s + ttt_chunk [401/474] bpb=1.116709 time=457.6s + ttt_chunk [411/474] bpb=1.117120 time=469.0s + ttt_chunk [421/474] bpb=1.118532 time=480.4s + ttt_chunk [431/474] bpb=1.117100 time=491.8s + ttt_chunk [441/474] bpb=1.116713 time=503.2s + ttt_chunk [451/474] bpb=1.116048 time=514.7s + ttt_chunk [461/474] bpb=1.116249 time=526.1s + ttt_chunk [471/474] bpb=1.116338 time=537.5s + ttt_chunk [474/474] bpb=1.116206 time=540.0s +ttt:done val_loss=1.883479 val_bpb=1.115506 elapsed=540.0s +final_int6_ttt val_loss:1.8835 val_bpb:1.1155 stride:32 eval_time:540962ms +final_int6_ttt_exact val_loss:1.88347869 val_bpb:1.11550587 diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed42.log b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed42.log new file mode 100644 index 0000000000..6ea1444085 --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed42.log @@ -0,0 +1,172 @@ +W0324 07:15:10.419000 100096 torch/distributed/run.py:851] +W0324 07:15:10.419000 100096 torch/distributed/run.py:851] ***************************************** +W0324 07:15:10.419000 100096 torch/distributed/run.py:851] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. +W0324 07:15:10.419000 100096 torch/distributed/run.py:851] ***************************************** +logs/026bfb42-da81-45bf-b73b-6ae924fd88fa.txt +val_bpb:enabled tokenizer_kind=sentencepiece tokenizer_path=./data/tokenizers/fineweb_1024_bpe.model +train_loader:dataset:fineweb10B_sp1024 train_shards:80 +val_loader:shards pattern=./data/datasets/fineweb10B_sp1024/fineweb_val_*.bin tokens:62021632 +mixed_precision: 68 int5 layers, 0 int6 layers (last 0 blocks) +model_params:33580124 +XSA:[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] ws:8 gqa:8/8 +lr:embed=0.035 matrix=0.025 scalar=0.025 batch:786432 wall:600s seed:42 +warmup_step:1/20 +warmup_step:2/20 +warmup_step:3/20 +warmup_step:4/20 +warmup_step:5/20 +warmup_step:6/20 +warmup_step:7/20 +warmup_step:8/20 +warmup_step:9/20 +warmup_step:10/20 +warmup_step:11/20 +warmup_step:12/20 +warmup_step:13/20 +warmup_step:14/20 +warmup_step:15/20 +warmup_step:16/20 +warmup_step:17/20 +warmup_step:18/20 +warmup_step:19/20 +warmup_step:20/20 +step:0/20000 val_loss:6.9309 val_bpb:4.1049 train_time:0ms step_avg:0.02ms +step:1/20000 train_loss:6.9335 train_time:154ms step_avg:153.60ms +step:2/20000 train_loss:8.6987 train_time:244ms step_avg:121.91ms +step:3/20000 train_loss:7.7606 train_time:339ms step_avg:112.85ms +step:4/20000 train_loss:7.2812 train_time:434ms step_avg:108.41ms +step:5/20000 train_loss:7.0422 train_time:529ms step_avg:105.73ms +step:6/20000 train_loss:6.9445 train_time:623ms step_avg:103.84ms +step:7/20000 train_loss:6.8297 train_time:718ms step_avg:102.52ms +step:8/20000 train_loss:6.6897 train_time:812ms step_avg:101.55ms +step:9/20000 train_loss:6.3850 train_time:907ms step_avg:100.77ms +step:10/20000 train_loss:5.9825 train_time:1002ms step_avg:100.21ms +step:500/20000 train_loss:2.3564 train_time:48431ms step_avg:96.86ms +step:1000/20000 train_loss:2.2389 train_time:97006ms step_avg:97.01ms +step:1500/20000 train_loss:2.1831 train_time:145627ms step_avg:97.08ms +step:2000/20000 train_loss:2.0279 train_time:194337ms step_avg:97.17ms +step:2500/20000 train_loss:2.1312 train_time:243086ms step_avg:97.23ms +step:3000/20000 train_loss:2.1151 train_time:291847ms step_avg:97.28ms +step:3500/20000 train_loss:2.1228 train_time:340613ms step_avg:97.32ms +step:4000/20000 train_loss:1.9145 train_time:389395ms step_avg:97.35ms +step:4000/20000 val_loss:2.0040 val_bpb:1.1869 train_time:389401ms step_avg:97.35ms +soft_round_qat:enabled initial_alpha=1.0 +late_qat:enabled step:4413 scale:0.4999 +step:4500/20000 train_loss:2.0597 train_time:438163ms step_avg:97.37ms +step:5000/20000 train_loss:2.0373 train_time:486893ms step_avg:97.38ms +swa:start step:5500 +step:5500/20000 train_loss:1.9452 train_time:535639ms step_avg:97.39ms +step:6000/20000 train_loss:1.8708 train_time:584998ms step_avg:97.50ms +step:6152/20000 val_loss:1.8998 val_bpb:1.1252 train_time:600042ms step_avg:97.54ms +stopping_early: wallclock_cap train_time:600042ms step:6152/20000 +peak memory allocated: 26201 MiB reserved: 26418 MiB +ema:applying EMA weights +DIAGNOSTIC post_ema val_loss:1.8982 val_bpb:1.1242 eval_time:2370ms +swa:applying SWA weights (count=14) +DIAGNOSTIC post_swa val_loss:1.8997 val_bpb:1.1251 eval_time:2371ms +best_averaging:ema val_bpb:1.1242 +Serialized model: 130956873 bytes +Code size: 106734 bytes +pruning:2.0% magnitude pruning applied +gptq:calibrating with training data... +gptq:calibrated 68 layers in 3.6s +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +Serialized model int6+zstd: 15308671 bytes +Total submission size int6+zstd: 15415405 bytes +TTT: epochs=3 lr=0.0001 freeze_first=2 chunk=131072 opt=adamw +TTT temperature: 0.98 +PPM alpha: 1.0, Byte-weighted TTT: False +ttt:start chunks=474 chunk_tokens=131072 windows=1938176 stride=32 lr=0.0001 epochs=3 opt=adamw freeze_first=2 +ttt:params unfrozen=5780500 frozen=27799624 + ttt_train [1] seqs=64 start_train... + ttt_train [1] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=2.0787 + ttt_train [1] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=2.0670 + ttt_train [1] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=2.0662 + ttt_chunk [1/474] bpb=1.201291 time=1.3s + ttt_train [2] seqs=64 start_train... + ttt_train [2] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.9070 + ttt_train [2] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.9062 + ttt_train [2] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.9039 + ttt_chunk [2/474] bpb=1.154634 time=2.5s + ttt_train [3] seqs=64 start_train... + ttt_train [3] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.8655 + ttt_train [3] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.8648 + ttt_train [3] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.8629 + ttt_chunk [3/474] bpb=1.130046 time=3.6s + ttt_chunk [4/474] bpb=1.137970 time=4.7s + ttt_chunk [5/474] bpb=1.136011 time=5.9s + ttt_chunk [11/474] bpb=1.117481 time=12.7s + ttt_chunk [21/474] bpb=1.112444 time=24.1s + ttt_chunk [31/474] bpb=1.110774 time=35.5s + ttt_chunk [41/474] bpb=1.118885 time=47.0s + ttt_chunk [51/474] bpb=1.126265 time=58.4s + ttt_chunk [61/474] bpb=1.124173 time=69.8s + ttt_chunk [71/474] bpb=1.125678 time=81.2s + ttt_chunk [81/474] bpb=1.126147 time=92.6s + ttt_chunk [91/474] bpb=1.128060 time=104.0s + ttt_chunk [101/474] bpb=1.124603 time=115.5s + ttt_chunk [111/474] bpb=1.124793 time=126.9s + ttt_chunk [121/474] bpb=1.128136 time=138.3s + ttt_chunk [131/474] bpb=1.128812 time=149.7s + ttt_chunk [141/474] bpb=1.128665 time=161.1s + ttt_chunk [151/474] bpb=1.126959 time=172.5s + ttt_chunk [161/474] bpb=1.127822 time=183.9s + ttt_chunk [171/474] bpb=1.126462 time=195.3s + ttt_chunk [181/474] bpb=1.127216 time=206.8s + ttt_chunk [191/474] bpb=1.126189 time=218.2s + ttt_chunk [201/474] bpb=1.125335 time=229.6s + ttt_chunk [211/474] bpb=1.124007 time=241.0s + ttt_chunk [221/474] bpb=1.124128 time=252.4s + ttt_chunk [231/474] bpb=1.123537 time=263.8s + ttt_chunk [241/474] bpb=1.122433 time=275.3s + ttt_chunk [251/474] bpb=1.123539 time=286.7s + ttt_chunk [261/474] bpb=1.124188 time=298.1s + ttt_chunk [271/474] bpb=1.122695 time=309.5s + ttt_chunk [281/474] bpb=1.122278 time=320.9s + ttt_chunk [291/474] bpb=1.120755 time=332.3s + ttt_chunk [301/474] bpb=1.121114 time=343.7s + ttt_chunk [311/474] bpb=1.120507 time=355.2s + ttt_chunk [321/474] bpb=1.118816 time=366.6s + ttt_chunk [331/474] bpb=1.117759 time=378.0s + ttt_chunk [341/474] bpb=1.117018 time=389.4s + ttt_chunk [351/474] bpb=1.115370 time=400.8s + ttt_chunk [361/474] bpb=1.115858 time=412.2s + ttt_chunk [371/474] bpb=1.115523 time=423.6s + ttt_chunk [381/474] bpb=1.116283 time=435.0s + ttt_chunk [391/474] bpb=1.117326 time=446.5s + ttt_chunk [401/474] bpb=1.117734 time=457.9s + ttt_chunk [411/474] bpb=1.118144 time=469.3s + ttt_chunk [421/474] bpb=1.119563 time=480.7s + ttt_chunk [431/474] bpb=1.118129 time=492.1s + ttt_chunk [441/474] bpb=1.117766 time=503.5s + ttt_chunk [451/474] bpb=1.117119 time=515.0s + ttt_chunk [461/474] bpb=1.117338 time=526.4s + ttt_chunk [471/474] bpb=1.117400 time=537.8s + ttt_chunk [474/474] bpb=1.117261 time=540.3s +ttt:done val_loss=1.884801 val_bpb=1.116289 elapsed=540.3s +final_int6_ttt val_loss:1.8848 val_bpb:1.1163 stride:32 eval_time:541278ms +final_int6_ttt_exact val_loss:1.88480123 val_bpb:1.11628915 diff --git a/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed7.log b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed7.log new file mode 100644 index 0000000000..0fe246d62e --- /dev/null +++ b/records/track_10min_16mb/2026-03-24_Int5GPTQ_33M_LegalTTT/train_seed7.log @@ -0,0 +1,172 @@ +W0324 07:20:32.173000 139509 torch/distributed/run.py:803] +W0324 07:20:32.173000 139509 torch/distributed/run.py:803] ***************************************** +W0324 07:20:32.173000 139509 torch/distributed/run.py:803] Setting OMP_NUM_THREADS environment variable for each process to be 1 in default, to avoid your system being overloaded, please further tune the variable for optimal performance in your application as needed. +W0324 07:20:32.173000 139509 torch/distributed/run.py:803] ***************************************** +logs/5d3ebe13-8183-4305-965c-55651fc9638b.txt +val_bpb:enabled tokenizer_kind=sentencepiece tokenizer_path=./data/tokenizers/fineweb_1024_bpe.model +train_loader:dataset:fineweb10B_sp1024 train_shards:80 +val_loader:shards pattern=./data/datasets/fineweb10B_sp1024/fineweb_val_*.bin tokens:62021632 +mixed_precision: 68 int5 layers, 0 int6 layers (last 0 blocks) +model_params:33580124 +XSA:[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10] ws:8 gqa:8/8 +lr:embed=0.035 matrix=0.025 scalar=0.025 batch:786432 wall:600s seed:7 +warmup_step:1/20 +warmup_step:2/20 +warmup_step:3/20 +warmup_step:4/20 +warmup_step:5/20 +warmup_step:6/20 +warmup_step:7/20 +warmup_step:8/20 +warmup_step:9/20 +warmup_step:10/20 +warmup_step:11/20 +warmup_step:12/20 +warmup_step:13/20 +warmup_step:14/20 +warmup_step:15/20 +warmup_step:16/20 +warmup_step:17/20 +warmup_step:18/20 +warmup_step:19/20 +warmup_step:20/20 +step:0/20000 val_loss:6.9311 val_bpb:4.1050 train_time:0ms step_avg:0.02ms +step:1/20000 train_loss:6.9326 train_time:153ms step_avg:152.55ms +step:2/20000 train_loss:8.7576 train_time:246ms step_avg:123.04ms +step:3/20000 train_loss:7.7488 train_time:342ms step_avg:114.08ms +step:4/20000 train_loss:7.2030 train_time:438ms step_avg:109.53ms +step:5/20000 train_loss:7.0022 train_time:534ms step_avg:106.79ms +step:6/20000 train_loss:6.8717 train_time:630ms step_avg:104.99ms +step:7/20000 train_loss:6.7821 train_time:726ms step_avg:103.66ms +step:8/20000 train_loss:6.6344 train_time:822ms step_avg:102.72ms +step:9/20000 train_loss:6.3142 train_time:918ms step_avg:101.98ms +step:10/20000 train_loss:5.9783 train_time:1014ms step_avg:101.40ms +step:500/20000 train_loss:2.3552 train_time:49006ms step_avg:98.01ms +step:1000/20000 train_loss:2.2387 train_time:98370ms step_avg:98.37ms +step:1500/20000 train_loss:2.1831 train_time:147750ms step_avg:98.50ms +step:2000/20000 train_loss:2.0243 train_time:197149ms step_avg:98.57ms +step:2500/20000 train_loss:2.1289 train_time:246526ms step_avg:98.61ms +step:3000/20000 train_loss:2.1142 train_time:295868ms step_avg:98.62ms +step:3500/20000 train_loss:2.1203 train_time:345180ms step_avg:98.62ms +step:4000/20000 train_loss:1.9099 train_time:394458ms step_avg:98.61ms +step:4000/20000 val_loss:2.0013 val_bpb:1.1853 train_time:394463ms step_avg:98.62ms +soft_round_qat:enabled initial_alpha=1.0 +late_qat:enabled step:4334 scale:0.4999 +step:4500/20000 train_loss:2.0596 train_time:443781ms step_avg:98.62ms +step:5000/20000 train_loss:2.0348 train_time:493046ms step_avg:98.61ms +swa:start step:5400 +step:5500/20000 train_loss:1.9439 train_time:542488ms step_avg:98.63ms +step:6000/20000 train_loss:1.8689 train_time:592060ms step_avg:98.68ms +step:6081/20000 val_loss:1.8999 val_bpb:1.1252 train_time:600095ms step_avg:98.68ms +stopping_early: wallclock_cap train_time:600095ms step:6081/20000 +peak memory allocated: 26199 MiB reserved: 26784 MiB +ema:applying EMA weights +DIAGNOSTIC post_ema val_loss:1.8983 val_bpb:1.1243 eval_time:2377ms +swa:applying SWA weights (count=14) +DIAGNOSTIC post_swa val_loss:1.9001 val_bpb:1.1253 eval_time:2379ms +best_averaging:ema val_bpb:1.1243 +Serialized model: 130956873 bytes +Code size: 106734 bytes +pruning:2.0% magnitude pruning applied +gptq:calibrating with training data... +gptq:calibrated 68 layers in 3.7s +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +gptq_quantize: 66 GPTQ layers, 0 naive layers +mixed_precision: 33423360 int5 params, 0 int6 params +Serialized model int6+zstd: 15261893 bytes +Total submission size int6+zstd: 15368627 bytes +TTT: epochs=3 lr=0.0001 freeze_first=2 chunk=131072 opt=adamw +TTT temperature: 0.98 +PPM alpha: 1.0, Byte-weighted TTT: False +ttt:start chunks=474 chunk_tokens=131072 windows=1938176 stride=32 lr=0.0001 epochs=3 opt=adamw freeze_first=2 +ttt:params unfrozen=5780500 frozen=27799624 + ttt_train [1] seqs=64 start_train... + ttt_train [1] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=2.0805 + ttt_train [1] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=2.0689 + ttt_train [1] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=2.0683 + ttt_chunk [1/474] bpb=1.200925 time=1.3s + ttt_train [2] seqs=64 start_train... + ttt_train [2] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.9082 + ttt_train [2] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.9075 + ttt_train [2] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.9048 + ttt_chunk [2/474] bpb=1.155071 time=2.5s + ttt_train [3] seqs=64 start_train... + ttt_train [3] epoch=1/3 batches=8 ... + step done ep=1 bs=0 loss=1.8586 + ttt_train [3] epoch=2/3 batches=8 ... + step done ep=2 bs=0 loss=1.8574 + ttt_train [3] epoch=3/3 batches=8 ... + step done ep=3 bs=0 loss=1.8559 + ttt_chunk [3/474] bpb=1.129053 time=3.6s + ttt_chunk [4/474] bpb=1.137770 time=4.8s + ttt_chunk [5/474] bpb=1.136142 time=5.9s + ttt_chunk [11/474] bpb=1.117081 time=12.8s + ttt_chunk [21/474] bpb=1.112525 time=24.2s + ttt_chunk [31/474] bpb=1.110601 time=35.6s + ttt_chunk [41/474] bpb=1.118836 time=47.0s + ttt_chunk [51/474] bpb=1.126156 time=58.4s + ttt_chunk [61/474] bpb=1.124130 time=69.8s + ttt_chunk [71/474] bpb=1.125735 time=81.2s + ttt_chunk [81/474] bpb=1.126269 time=92.7s + ttt_chunk [91/474] bpb=1.128083 time=104.1s + ttt_chunk [101/474] bpb=1.124677 time=115.5s + ttt_chunk [111/474] bpb=1.125049 time=126.9s + ttt_chunk [121/474] bpb=1.128310 time=138.3s + ttt_chunk [131/474] bpb=1.129031 time=149.7s + ttt_chunk [141/474] bpb=1.129021 time=161.1s + ttt_chunk [151/474] bpb=1.127264 time=172.5s + ttt_chunk [161/474] bpb=1.128178 time=184.0s + ttt_chunk [171/474] bpb=1.126890 time=195.4s + ttt_chunk [181/474] bpb=1.127673 time=206.8s + ttt_chunk [191/474] bpb=1.126603 time=218.2s + ttt_chunk [201/474] bpb=1.125778 time=229.6s + ttt_chunk [211/474] bpb=1.124423 time=241.0s + ttt_chunk [221/474] bpb=1.124509 time=252.4s + ttt_chunk [231/474] bpb=1.123899 time=263.8s + ttt_chunk [241/474] bpb=1.122760 time=275.3s + ttt_chunk [251/474] bpb=1.123798 time=286.7s + ttt_chunk [261/474] bpb=1.124407 time=298.1s + ttt_chunk [271/474] bpb=1.122942 time=309.5s + ttt_chunk [281/474] bpb=1.122514 time=320.9s + ttt_chunk [291/474] bpb=1.120992 time=332.3s + ttt_chunk [301/474] bpb=1.121428 time=343.7s + ttt_chunk [311/474] bpb=1.120836 time=355.1s + ttt_chunk [321/474] bpb=1.119179 time=366.5s + ttt_chunk [331/474] bpb=1.118111 time=377.9s + ttt_chunk [341/474] bpb=1.117318 time=389.4s + ttt_chunk [351/474] bpb=1.115673 time=400.8s + ttt_chunk [361/474] bpb=1.116152 time=412.2s + ttt_chunk [371/474] bpb=1.115831 time=423.6s + ttt_chunk [381/474] bpb=1.116577 time=435.0s + ttt_chunk [391/474] bpb=1.117608 time=446.4s + ttt_chunk [401/474] bpb=1.118021 time=457.9s + ttt_chunk [411/474] bpb=1.118453 time=469.2s + ttt_chunk [421/474] bpb=1.119901 time=480.6s + ttt_chunk [431/474] bpb=1.118463 time=491.9s + ttt_chunk [441/474] bpb=1.118084 time=503.3s + ttt_chunk [451/474] bpb=1.117423 time=514.7s + ttt_chunk [461/474] bpb=1.117641 time=526.0s + ttt_chunk [471/474] bpb=1.117706 time=537.4s + ttt_chunk [474/474] bpb=1.117562 time=539.8s +ttt:done val_loss=1.885435 val_bpb=1.116665 elapsed=539.8s +final_int6_ttt val_loss:1.8854 val_bpb:1.1167 stride:32 eval_time:540891ms +final_int6_ttt_exact val_loss:1.88543543 val_bpb:1.11666477