add support for 64 block size on 32 warp size supported amd gpus #1748
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Thanks for the PR! I don't have the bandwidth to test this personally at the moment, so will defer to AMD team. Also I do not have any RDNA GPUs on hand. cc: @pnunna93 |
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The docs for this PR live here. All of your documentation changes will be reflected on that endpoint. The docs are available until 30 days after the last update. |
pnunna93
suggested changes
Sep 24, 2025
| hipLaunchKernelGGL(( kQuantizeBlockwise<T, 128, 2, 0, DATA_TYPE>), dim3(num_blocks), dim3(64), 0, 0, code, A, absmax, out, rand, rand_offset, n); | ||
| //else if(blocksize == 64) | ||
| // hipLaunchKernelGGL(( kQuantizeBlockwise<T, 64, 2, 0, DATA_TYPE>), dim3(num_blocks), dim3(32), 0, 0, code, A, absmax, out, rand, rand_offset, n); | ||
| else if(blocksize == 64 && warpSize == 32) |
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warpSize will be deprecated in 7.0, we just added a WARP_SIZE macro, please use it instead.
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https://rocm.docs.amd.com/en/latest/reference/gpu-arch-specs.html most non instinct gpus support 32 warp size
tested on RX 9070 XT, looking into getting this tested on amd instinct accelerators to ensure gpus with 64 warp size still work