docs: update ckProfiler readme with selective building option (#3140)

* docs: update ckProfiler readme with selective building option

* docs: add list of operations for ckProfiler

Author: AviralGoelAMD

profiler/README.md

@@ -1,5 +1,23 @@
 [Back to the main page](../README.md)
 # Composable Kernel profiler
+
+## Building Specific Profilers
+To reduce build time, filter which operations to compile using CMake options:
+
+```bash
+# Build all grouped_gemm variants (grouped_gemm, grouped_gemm_fastgelu, grouped_gemm_tile_loop, etc.)
+cmake -DCK_PROFILER_OP_FILTER="grouped_gemm" <other options> ..
+
+# Build ONLY base grouped_gemm (excludes variants - use exact regex match with ^ and $)
+cmake -DCK_PROFILER_OP_FILTER="^grouped_gemm$" <other options> ..
+```
+
+Both `CK_PROFILER_OP_FILTER` and `CK_PROFILER_INSTANCE_FILTER` accept regex patterns. Default builds all operations.
+
+To find the complete list of operations, run the following command:
+```bash
+find profiler/src -name "profile_*.cpp" | sed 's|profiler/src/profile_||' | sed 's|.cpp||' | sort
+```
 ## Profiler GEMM UNIVERSAL kernels
 ```bash
 # arg1: tensor operation (gemm_universal: Universal GEMM)