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Aug 19, 2025
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CANN: optimize the rope ops #15335

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0ff18e0
optimize rope ops
YangShuai52 Aug 14, 2025
930ee57
amendment
YangShuai52 Aug 15, 2025
682600c
delete trailing whitespace
YangShuai52 Aug 15, 2025
170d40e
change the variable name
YangShuai52 Aug 18, 2025
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170 changes: 106 additions & 64 deletions ggml/src/ggml-cann/aclnn_ops.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2154,86 +2154,129 @@ static void aclnn_cache_init(ggml_backend_cann_context& ctx, ggml_tensor* dst,

GGML_TENSOR_BINARY_OP_LOCALS

// theta_scale arange, [0,1,...,ne00/2 - 1]
int64_t theta_scale_length = ne00 / 2;
ggml_cann_pool_alloc theta_scale_allocator(ctx.pool(),
theta_scale_length * sizeof(float_t));
void* theta_scale_buffer = theta_scale_allocator.get();
int64_t theta_scale_ne[] = {theta_scale_length, 1, 1, 1};
size_t theta_scale_nb[] = {sizeof(float_t), sizeof(float_t), sizeof(float_t),
theta_scale_length * sizeof(float_t)};

aclTensor* acl_theta_scale_tensor =
ggml_cann_create_tensor(theta_scale_buffer, ACL_FLOAT, sizeof(float_t),
theta_scale_ne, theta_scale_nb, GGML_MAX_DIMS);
float start = 0;
float step = 1;
float stop = ne00 / 2;
float n_elements = ne00 / 2;
aclnn_arange(ctx, acl_theta_scale_tensor, start, stop, step, n_elements);

// power
aclScalar* acl_theta_scale = aclCreateScalar(&theta_scale, aclDataType::ACL_FLOAT);
GGML_CANN_CALL_ACLNN_OP(ctx, PowScalarTensor, acl_theta_scale, acl_theta_scale_tensor,
acl_theta_scale_tensor);

// freq_scale
if (freq_scale != 1) {
aclnn_muls(ctx, acl_theta_scale_tensor, freq_scale, nullptr, true);
}

// freq_factors
if (src2) {
aclTensor* acl_freq_factors_tensor = ggml_cann_create_tensor(
src2->data, ggml_cann_type_mapping(src2->type),
ggml_type_size(src2->type), theta_scale_ne, theta_scale_nb, GGML_MAX_DIMS);
aclnn_div(ctx, acl_theta_scale_tensor, acl_freq_factors_tensor);
ggml_cann_release_resources(ctx, acl_freq_factors_tensor);
}

// position
GGML_ASSERT(src1->type == GGML_TYPE_I32);
int64_t position_length = src1->ne[0];
int64_t position_ne[] = {1, 1, position_length, 1};
size_t position_nb[] = {sizeof(int32_t), sizeof(int32_t), sizeof(int32_t),
sizeof(int32_t) * position_length};
aclTensor* acl_position_tensor = ggml_cann_create_tensor(
src1->data, ggml_cann_type_mapping(src1->type),
ggml_type_size(src1->type), position_ne, position_nb, GGML_MAX_DIMS);

// power * position
int64_t theta_length = theta_scale_length * position_length;
ggml_cann_pool_alloc theta_allocator(ctx.pool(),
theta_length * sizeof(float_t));
void* theta_buffer = theta_allocator.get();

int64_t theta_ne[] = {theta_scale_length, 1, position_length, 1};
size_t theta_nb[GGML_MAX_DIMS];
theta_nb[0] = sizeof(float_t);
for (int i = 1; i < GGML_MAX_DIMS; i++) {
theta_nb[i] = theta_nb[i - 1] * theta_ne[i - 1];
}
aclTensor* acl_theta_tensor =
ggml_cann_create_tensor(theta_buffer, ACL_FLOAT, sizeof(float_t),
theta_ne, theta_nb, GGML_MAX_DIMS);
aclnn_mul(ctx, acl_position_tensor, acl_theta_scale_tensor,
acl_theta_tensor);

// sin/cos
ggml_cann_pool_alloc sin_allocator(ctx.pool(),
theta_length * sizeof(float_t));
void* sin_buffer = sin_allocator.get();
aclTensor* acl_sin_tensor = ggml_cann_create_tensor(
sin_buffer, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);
aclnn_sin(ctx, acl_theta_tensor, acl_sin_tensor);

ggml_cann_pool_alloc cos_allocator(ctx.pool(),
theta_length * sizeof(float_t));
void* cos_buffer = cos_allocator.get();
bool is_q = (std::strncmp(dst->name, "Qcur-", 5) == 0);
bool is_k = (std::strncmp(dst->name, "Kcur-", 5) == 0);

// used for accuracy testing
bool is_attention = is_q || is_k;

if(ctx.init_ptr == nullptr || !is_attention) {
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Add a comment indicating that is_attention is a flag used for accuracy testing.

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Thank you for your suggestion; it has been revised.

// theta_scale arange, [0,1,...,ne00/2 - 1]
if(ctx.init_ptr != nullptr){
ACL_CHECK(aclrtFree(ctx.init_ptr));
}
ACL_CHECK(aclrtMalloc(&ctx.init_ptr, theta_scale_length * sizeof(float_t), ACL_MEM_MALLOC_HUGE_FIRST));

aclTensor* acl_theta_scale_tensor =
ggml_cann_create_tensor(ctx.init_ptr, ACL_FLOAT, sizeof(float_t),
theta_scale_ne, theta_scale_nb, GGML_MAX_DIMS);
float start = 0;
float step = 1;
float stop = ne00 / 2;
float n_elements = ne00 / 2;
aclnn_arange(ctx, acl_theta_scale_tensor, start, stop, step, n_elements);

// power
aclScalar* acl_theta_scale = aclCreateScalar(&theta_scale, aclDataType::ACL_FLOAT);
GGML_CANN_CALL_ACLNN_OP(ctx, PowScalarTensor, acl_theta_scale, acl_theta_scale_tensor,
acl_theta_scale_tensor);

// freq_scale
if (freq_scale != 1) {
aclnn_muls(ctx, acl_theta_scale_tensor, freq_scale, nullptr, true);
}

// freq_factors
if (src2) {
aclTensor* acl_freq_factors_tensor = ggml_cann_create_tensor(
src2->data, ggml_cann_type_mapping(src2->type),
ggml_type_size(src2->type), theta_scale_ne, theta_scale_nb, GGML_MAX_DIMS);
aclnn_div(ctx, acl_theta_scale_tensor, acl_freq_factors_tensor);
ggml_cann_release_resources(ctx, acl_freq_factors_tensor);
}
// release
ggml_cann_release_resources(ctx, acl_theta_scale_tensor,acl_theta_scale);
}

if(ctx.sin_ptr == nullptr) {
int64_t theta_length = theta_scale_length * ctx.max_prompt_length;
ACL_CHECK(aclrtMalloc(&ctx.sin_ptr, theta_length * sizeof(float_t), ACL_MEM_MALLOC_HUGE_FIRST));
ACL_CHECK(aclrtMalloc(&ctx.cos_ptr, theta_length * sizeof(float_t), ACL_MEM_MALLOC_HUGE_FIRST));
}
if(position_length > ctx.max_prompt_length) {
ctx.max_prompt_length = position_length;
int64_t theta_length = theta_scale_length * ctx.max_prompt_length;
ACL_CHECK(aclrtFree(ctx.sin_ptr));
ACL_CHECK(aclrtFree(ctx.cos_ptr));
ACL_CHECK(aclrtMalloc(&ctx.sin_ptr, theta_length * sizeof(float_t), ACL_MEM_MALLOC_HUGE_FIRST));
ACL_CHECK(aclrtMalloc(&ctx.cos_ptr, theta_length * sizeof(float_t), ACL_MEM_MALLOC_HUGE_FIRST));
}

bool is_fisrt_layer = (std::strncmp(dst->name, "Qcur-0", GGML_MAX_NAME) == 0);

if(is_fisrt_layer || !is_attention) {

aclTensor* acl_theta_scale_tensor =
ggml_cann_create_tensor(ctx.init_ptr, ACL_FLOAT, sizeof(float_t),
theta_scale_ne, theta_scale_nb, GGML_MAX_DIMS);

// position
aclTensor* acl_position_tensor = ggml_cann_create_tensor(
src1->data, ggml_cann_type_mapping(src1->type),
ggml_type_size(src1->type), position_ne, position_nb, GGML_MAX_DIMS);

// power * position
int64_t theta_length = theta_scale_length * position_length;
ggml_cann_pool_alloc theta_allocator(ctx.pool(),
theta_length * sizeof(float_t));
void* theta_buffer = theta_allocator.get();

aclTensor* acl_theta_tensor =
ggml_cann_create_tensor(theta_buffer, ACL_FLOAT, sizeof(float_t),
theta_ne, theta_nb, GGML_MAX_DIMS);
aclnn_mul(ctx, acl_position_tensor, acl_theta_scale_tensor,
acl_theta_tensor);

// sin/cos
aclTensor* acl_sin_tensor = ggml_cann_create_tensor(
ctx.sin_ptr, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);
aclnn_sin(ctx, acl_theta_tensor, acl_sin_tensor);

aclTensor* acl_cos_tensor = ggml_cann_create_tensor(
ctx.cos_ptr, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);
aclnn_cos(ctx, acl_theta_tensor, acl_cos_tensor);

// release
ggml_cann_release_resources(ctx, acl_theta_scale_tensor, acl_position_tensor,
acl_theta_tensor, acl_sin_tensor, acl_cos_tensor);
}

aclTensor* acl_sin_tensor = ggml_cann_create_tensor(
ctx.sin_ptr, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);
aclTensor* acl_cos_tensor = ggml_cann_create_tensor(
cos_buffer, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);
aclnn_cos(ctx, acl_theta_tensor, acl_cos_tensor);
ctx.cos_ptr, ACL_FLOAT, sizeof(float_t), theta_ne, theta_nb,
GGML_MAX_DIMS, ACL_FORMAT_ND);

// attn_factor
if (attn_factor != 1) {
Expand All @@ -2257,8 +2300,7 @@ static void aclnn_cache_init(ggml_backend_cann_context& ctx, ggml_tensor* dst,
}

// release
ggml_cann_release_resources(ctx, acl_theta_scale_tensor, acl_position_tensor,
acl_theta_tensor, acl_sin_tensor, acl_cos_tensor, acl_theta_scale);
ggml_cann_release_resources(ctx, acl_sin_tensor, acl_cos_tensor);
}

#ifdef __cplusplus
Expand Down
13 changes: 13 additions & 0 deletions ggml/src/ggml-cann/common.h
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Original file line number Diff line number Diff line change
Expand Up @@ -368,6 +368,10 @@ struct ggml_backend_cann_context {
std::string name; /**< Name of the device. */
std::string description; /**< Description of the device. */
aclrtEvent copy_event = nullptr; /**< Event for managing copy operations. */
void* init_ptr = nullptr;
void* sin_ptr = nullptr;
void* cos_ptr = nullptr;
int64_t max_prompt_length = 65536;
#ifdef USE_ACL_GRAPH
/// Cached CANN ACL graph used for executing the current ggml computation graph.
std::unique_ptr<ggml_cann_graph> cann_graph;
Expand Down Expand Up @@ -414,6 +418,15 @@ struct ggml_backend_cann_context {
ACL_CHECK(aclrtDestroyStream(streams[i]));
}
}
if(init_ptr != nullptr) {
ACL_CHECK(aclrtFree(init_ptr));
}
if(sin_ptr != nullptr) {
ACL_CHECK(aclrtFree(sin_ptr));
}
if(cos_ptr != nullptr) {
ACL_CHECK(aclrtFree(cos_ptr));
}
}

/**
Expand Down
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