PR Import Test#8
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This was referenced May 13, 2025
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Summary
This PR updates the matrix multiply kernel to use an optimized path for small matrix sizes. This improves performance on select benchmarks by up to 15%.
Rationale
Small matrices (e.g., 32x32 or smaller) were previously handled by a general-purpose kernel. Profiling showed excessive thread divergence and shared memory underutilization. This PR adds a specialized kernel to improve efficiency.
Changes
Testing
Ran all existing unit tests locally with Usage
ctest [options]: ✅ Passed
Verified correctness against CPU reference implementation
Benchmarked on MI300 with small matrix sizes — observed 10–15% performance improvement
CI pipelines should pass on merge
Notes
🔁 Imported from jayhawk-commits/hipCUB#7
🧑💻 Originally authored by @jayhawk-commits