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* GH-2368 Adding a basic glossary GH-2368 Minor edits GH-2368 Adding missing READMEs and standardization. resolving readme updates GH-2368 Minor improvements to documentation. Improving some readmes. Further improvement for readmes. Cleaned up the documentation in 'client_example' (#2468) Update for PR Update ACRONYMS.md to remove trivial terms Update ACRONYMS.md to provide detailed explanations for BF16 and BF8 formats Apply suggestion from @spolifroni-amd Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com> Apply suggestion from @spolifroni-amd Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com> Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine. revise 37_transpose readme revise 36_copy readme Remove references to the Tile Engine in README files for 19_gemm_multi_d and 35_batched_transpose, and update distribution links for clarity. Remove references to the Tile Engine in multiple README files and update distribution links for consistency and clarity. Remove references to the Tile Engine in README files across multiple examples * GH-2368 Adding a basic glossary GH-2368 Minor edits GH-2368 Adding missing READMEs and standardization. resolving readme updates GH-2368 Minor improvements to documentation. Improving some readmes. Further improvement for readmes. Cleaned up the documentation in 'client_example' (#2468) Update for PR Update ACRONYMS.md to remove trivial terms Update ACRONYMS.md to provide detailed explanations for BF16 and BF8 formats Apply suggestion from @spolifroni-amd Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com> Apply suggestion from @spolifroni-amd Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com> Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine. revise 37_transpose readme revise 36_copy readme Remove references to the Tile Engine in README files for 19_gemm_multi_d and 35_batched_transpose, and update distribution links for clarity. Remove references to the Tile Engine in multiple README files and update distribution links for consistency and clarity. Remove references to the Tile Engine in README files across multiple examples Refine README files by removing outdated references to the Tile Engine * Updates based on PR feedback 1 * Updates based on PR feedback 2 * Updates based on PR feedback 3 * Updates based on PR feedback 4 * Updates based on PR feedback 5 * Updates based on PR feedback 6 * Updates based on PR feedback 7 * Updates based on PR feedback 8 * Content Modification of CK Tile Example * Modify the ck_tile gemm config --------- Co-authored-by: AviralGoelAMD <aviral.goel@amd.com> Co-authored-by: ThomasNing <thomas.ning@amd.com>
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Client Example: Split-K GEMM
Theory
This client example demonstrates Split-K GEMM, a technique for parallelizing matrix multiplication along the K dimension. Split-K is used to improve parallelism and memory bandwidth utilization for large GEMM operations, especially when K is large.
Mathematical Formulation:
- Standard GEMM:
C = A \times B - Split-K: Partition the K dimension into
K_ssplits, compute partial results, then reduce:C = \sum_{s=1}^{K_s} (A_{[:, K_s]} \times B_{[K_s, :]})
Algorithmic Background:
- Each split computes a partial GEMM over a chunk of K.
- Partial results are reduced (summed) to produce the final output.
- Useful for large K, limited workspace, or maximizing GPU occupancy.
How to Run
Prerequisites
Please follow the instructions in the main Build Guide section as a prerequisite to building and running this example.
Build and run
cd composable_kernel/client_example/20_splitk_gemm
mkdir build && cd build
cmake -DCMAKE_CXX_COMPILER=/opt/rocm/bin/hipcc ..
make -j
# Example run (FP16 compute, FP8 output)
./splitK_gemm_fp16_f8
Source Code Structure
Directory Layout
client_example/20_splitk_gemm/
├── splitK_gemm_fp16_f8.cpp # Main client example: Split-K GEMM (FP16 compute, FP8 output)
├── CMakeLists.txt # Build configuration for the example
Key Functions
- main() (in
splitK_gemm_fp16_f8.cpp):
Sets up input matrices, configures Split-K parameters, launches the Split-K GEMM kernel, and verifies the result. - Split-K kernel invocation:
Uses the Composable Kernel device API to launch the Split-K GEMM operation.
Additional Details
- Supports FP16 compute with FP8 output for memory efficiency.
- Example parameters can be adjusted in the source for different workloads.
Related Examples
- 35_splitK_gemm: Split-K GEMM in the main example directory