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[Kernel] LoRA - Refactor sgmv kernels #13110

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merged 2 commits into from
Feb 20, 2025

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varun-sundar-rabindranath
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Refactor / Modularize sgmv_shrink and sgmv_expand kernels to enable better code re-use.

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@@ -62,67 +63,50 @@ def _sgmv_shrink_kernel(
pid_sk = pid_mix % SPLIT_K

M = tl.load(seq_lens + cur_batch)
if pid_m * BLOCK_M > M:
if pid_m * BLOCK_M >= M:
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calling attention to a functional change - I believe it was a bug before.

return
if pid_n * BLOCK_N > curr_N:
if pid_n * BLOCK_N >= curr_N:
return
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Calling attention to functional changes, I believe,
if pid_m * BLOCK_M > M: and
if pid_n * BLOCK_N > curr_N: were bugs before.

@varun-sundar-rabindranath
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varun-sundar-rabindranath commented Feb 11, 2025

I have a PR #13096 for V1 that introduces a shrink and expand kernels. The V1 kernels are very similar to the SGMV kernels. This refactor helps that PR also.
I have marked #13096 as draft for now - I'll open that PR once this PR lands 🙏

@jeejeelee PTAL ! Thanks !

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overall, LGTM

@jeejeelee jeejeelee added the ready ONLY add when PR is ready to merge/full CI is needed label Feb 20, 2025
Varun Sundar Rabindranath added 2 commits February 20, 2025 01:41
Signed-off-by: Varun Sundar Rabindranath <[email protected]>
Signed-off-by: Varun Sundar Rabindranath <[email protected]>
@mgoin mgoin merged commit b69692a into vllm-project:main Feb 20, 2025
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kerthcet pushed a commit to kerthcet/vllm that referenced this pull request Feb 21, 2025
michaelrglass pushed a commit to michaelrglass/vllm that referenced this pull request Feb 21, 2025
Akshat-Tripathi pushed a commit to krai/vllm that referenced this pull request Mar 3, 2025
lk-chen pushed a commit to lk-chen/vllm that referenced this pull request Mar 5, 2025
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3 participants