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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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Remove references to the Tile Engine in README files across multiple examples Refine README files by removing outdated references to the Tile Engine * Updates based on PR feedback 1 * Updates based on PR feedback 2 * Updates based on PR feedback 3 * Updates based on PR feedback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>
2.2 KiB
2.2 KiB
Grouped GEMM
Theory
This example demonstrates grouped GEMM: performing multiple independent GEMM operations (with potentially different shapes) in a single kernel launch. Grouped GEMM is used in transformer models (e.g., multi-head attention), mixture-of-experts, and other architectures requiring heterogeneous batched matrix multiplications.
Mathematical Formulation:
For G groups, each with its own A_g, B_g, C_g:
C_g = A_g \times B_g \quad \text{for} \quad g = 1, 2, ..., G
A_g: [M_g, K_g] input matrix for groupgB_g: [K_g, N_g] weight matrix for groupgC_g: [M_g, N_g] output matrix for groupg
Algorithmic Background:
- Each group can have different matrix sizes and strides.
- The kernel launches a grid covering all groups, with each block assigned to a group.
- Useful for variable-length sequences, multi-head attention, and expert routing.
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/example/15_grouped_gemm
mkdir build && cd build
cmake -DCMAKE_CXX_COMPILER=/opt/rocm/bin/hipcc ..
make -j
Run example_grouped_gemm_xdl
#arg1: verification (0=no, 1=yes)
#arg2: initialization (0=no init, 1=integer value, 2=decimal value)
#arg3: run kernel # of times (>1)
./bin/example_grouped_gemm_xdl_fp16 0 1 5
Source Code Structure
Directory Layout
example/15_grouped_gemm/
├── grouped_gemm_xdl.cpp # Main example: sets up, runs, and verifies grouped GEMM
include/ck/tensor_operation/gpu/device/
│ └── device_grouped_gemm_xdl.hpp # Device-level grouped GEMM API
include/ck/tensor_operation/gpu/grid/
│ └── gridwise_grouped_gemm_xdl.hpp # Grid-level grouped GEMM kernel
Key Classes and Functions
- DeviceGroupedGemmXdl (in
device_grouped_gemm_xdl.hpp):
Device API for grouped GEMM. - gridwise_grouped_gemm_xdl (in
gridwise_grouped_gemm_xdl.hpp):
Implements the tiled/blocking grouped GEMM kernel.
This example demonstrates how Composable Kernel supports efficient heterogeneous batched matrix multiplication for advanced AI/ML workloads.