gemm split-k implementation #696
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xiaohuguo2023
commented
Jan 7, 2025
xiaohuguo2023
commented
- add autotuning for split-k
- add reduction kernel for split-k
- use torch.sum to replace split-k reduction kernel
vgokhale
reviewed
Jan 7, 2025
python/perf-kernels/gemm.py
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| @@ -145,11 +194,17 @@ def matmul(a, b, c, a_scale, b_scale, scale_a8_b8=False, activation=""): | |||
| assert a.dtype == b.dtype, "Mixed dtype GEMMs are not supported!!!" | |||
| M, K = a.shape | |||
| K, N = b.shape | |||
| grid = lambda META: (triton.cdiv(M, META['BLOCK_SIZE_M']) * triton.cdiv(N, META['BLOCK_SIZE_N']), ) | |||
| splitk = 1 | |||
| c_buf = torch.zeros((M, N, splitk), device=a.device, dtype=torch.float32) | |||
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