Gemm-allreduce loop optimization#170
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drprajap
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May 13, 2026
| remote_c_ptr = dl.consume_token(remote_c_ptr, token) | ||
| remote_c_ptrs = remote_c_ptr + offs_cm[:, None] * stride_cm + offs_cn[None, :] * stride_cn | ||
| final_acc = tl.load(remote_c_ptrs, mask=c_mask, other=0.0).to(tl.float32) | ||
| for i in range(1, world_size): |
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this is still wait-all, reduce-all, if we decouple wait and reduce in separate loops, that can help as well.
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Removes some unnecessary loop iterations. This actually cuts the execution time roughly in half (7ms down to 3ms) on MI350. I also added the allreduce test to the CI.