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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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Remove references to the Tile Engine in README files across multiple examples Refine README files by removing outdated references to the Tile Engine * Updates based on PR feedback 1 * Updates based on PR feedback 2 * Updates based on PR feedback 3 * Updates based on PR feedback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
GEMM with Bias, Elementwise, and Permute Fusion
Theory
This example demonstrates GEMM fused with bias addition, elementwise operation, and permutation. This pattern is used in transformer models and other neural architectures where a linear transformation is followed by bias, activation, and layout transformation.
Mathematical Formulation:
- GEMM:
Y = A \times B - Bias:
Z = Y + \text{bias} - Elementwise:
E = f(Z)(e.g., activation) - Permute:
O = \text{permute}(E, \text{axes})
Algorithmic Background:
- The GEMM result is kept in registers, bias and elementwise ops are fused in the epilogue, and permutation is applied before writing to global memory.
- Permutation changes the layout/order of tensor axes (e.g., NCHW to NHWC).
- This fusion reduces memory traffic and is common in transformer and CNN pipelines.
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/25_gemm_bias_e_permute
mkdir build && cd build
cmake -DCMAKE_CXX_COMPILER=/opt/rocm/bin/hipcc ..
make -j
# Example run
./gemm_bias_e_permute_xdl --verify=1 --time=1
Source Code Structure
Directory Layout
example/25_gemm_bias_e_permute/
├── gemm_bias_e_permute_xdl.cpp # Main example: sets up, runs, and verifies GEMM+Bias+Elementwise+Permute
include/ck/tensor_operation/gpu/device/
│ └── device_gemm_bias_e_permute.hpp # Device-level API for fused GEMM
include/ck/tensor_operation/gpu/device/impl/
│ └── device_gemm_bias_e_permute_impl.hpp # Implementation
include/ck/tensor_operation/gpu/grid/
└── gridwise_gemm_bias_e_permute.hpp # Grid-level kernel
Key Classes and Functions
- DeviceGemmBiasEPermute (in
device_gemm_bias_e_permute.hpp):
Device API for GEMM fused with bias, elementwise, and permutation. - gridwise_gemm_bias_e_permute (in
gridwise_gemm_bias_e_permute.hpp):
Implements the tiled/blocking GEMM kernel with fused epilogue and permutation.
This example demonstrates how Composable Kernel supports efficient fusion of linear, bias, activation, and layout operations for deep learning models.