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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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Remove references to the Tile Engine in README files across multiple examples Refine README files by removing outdated references to the Tile Engine * Updates based on PR feedback 1 * Updates based on PR feedback 2 * Updates based on PR feedback 3 * Updates based on PR feedback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>
2.4 KiB
2.4 KiB
GEMM with Multiple D and Multiple Reductions
Theory
This example demonstrates GEMM with multiple auxiliary tensors (D) and multiple reduction operations. This pattern is used in advanced neural network layers that require additional outputs or statistics (such as sums, means, or other reductions) alongside the main GEMM result.
Mathematical Formulation:
- For each GEMM:
C = A \times B - Auxiliary tensors:
D_0, D_1, ...(various shapes) - Reductions: e.g., sum, mean, max over specified axes or outputs
The kernel computes the main GEMM output and additional reductions or statistics in a single pass.
Algorithmic Background:
- The GEMM result is kept in registers, auxiliary tensors are fused in the epilogue, and reductions are computed as part of the output.
- Useful for multi-task learning, attention statistics, and custom neural network layers.
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/16_gemm_multi_d_multi_reduces
mkdir build && cd build
cmake -DCMAKE_CXX_COMPILER=/opt/rocm/bin/hipcc ..
make -j
# Example run
./gemm_multi_d_multi_reduces_xdl --verify=1 --time=1
Source Code Structure
Directory Layout
example/16_gemm_multi_d_multi_reduces/
├── gemm_multi_d_multi_reduces_xdl.cpp # Main example: sets up, runs, and verifies GEMM with multi-D/multi-reduce
include/ck/tensor_operation/gpu/device/
│ └── device_gemm_multi_d_multi_reduces.hpp # Device-level API for multi-D/multi-reduce GEMM
include/ck/tensor_operation/gpu/device/impl/
│ └── device_gemm_multi_d_multi_reduces_impl.hpp # Implementation
include/ck/tensor_operation/gpu/grid/
└── gridwise_gemm_multi_d_multi_reduces.hpp # Grid-level kernel
Key Classes and Functions
- DeviceGemmMultiDMultiReduces (in
device_gemm_multi_d_multi_reduces.hpp):
Device API for GEMM with multiple outputs and reductions. - gridwise_gemm_multi_d_multi_reduces (in
gridwise_gemm_multi_d_multi_reduces.hpp):
Implements the tiled/blocking GEMM kernel with multi-output/reduce epilogue.
This example demonstrates how Composable Kernel supports advanced GEMM patterns with multiple outputs and reductions in a single efficient kernel.