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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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Update README.md to clarify CK Tile API description and remove outdated references to the Tile Engine.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 Remove references to the Tile Engine in README files across multiple examples Refine README files by removing outdated references to the Tile Engine * Updates based on PR feedback 1 * Updates based on PR feedback 2 * Updates based on PR feedback 3 * Updates based on PR feedback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 LayerNorm Fusion
Theory
This example demonstrates GEMM fused with layer normalization. This pattern is used in transformer feed-forward networks and other architectures where a linear transformation is followed by normalization for improved training stability.
Mathematical Formulation:
- GEMM:
Y = A \times B - LayerNorm:
\text{LayerNorm}(Y) = \gamma \cdot \frac{Y - \mu}{\sqrt{\sigma^2 + \epsilon}} + \beta\mu: mean ofYover the normalization axis\sigma^2: variance ofYover the normalization axis\gamma,\beta: learnable scale and shift parameters
Algorithmic Background:
- The GEMM result is kept in registers, and layer normalization is applied before writing to global memory.
- LayerNorm is typically applied over the last dimension (features).
- This fusion reduces memory traffic and is common in transformer MLP blocks.
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/21_gemm_layernorm
mkdir build && cd build
cmake -DCMAKE_CXX_COMPILER=/opt/rocm/bin/hipcc ..
make -j
# Example run
./gemm_layernorm_xdl --verify=1 --time=1
Source Code Structure
Directory Layout
example/21_gemm_layernorm/
├── gemm_layernorm_xdl.cpp # Main example: sets up, runs, and verifies GEMM+LayerNorm
include/ck/tensor_operation/gpu/device/
│ └── device_gemm_layernorm.hpp # Device-level GEMM+LayerNorm API
include/ck/tensor_operation/gpu/device/impl/
│ └── device_gemm_layernorm_impl.hpp # Implementation
include/ck/tensor_operation/gpu/grid/
└── gridwise_gemm_layernorm.hpp # Grid-level kernel
Key Classes and Functions
- DeviceGemmLayerNorm (in
device_gemm_layernorm.hpp):
Device API for GEMM fused with layer normalization. - gridwise_gemm_layernorm (in
gridwise_gemm_layernorm.hpp):
Implements the tiled/blocking GEMM kernel with layer normalization epilogue.
This example demonstrates how Composable Kernel supports efficient fusion of linear and normalization layers for transformer and deep learning models.