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[GH-ISSUE #244] How many kForwarderCoordinator warps are actually used #188

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opened 2026-10-26 09:56:11 +00:00 by bsakaguchi · 1 comment
bsakaguchi commented 2026-10-26 09:56:11 +00:00
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Originally created by @ZhiyiHu1999 on GitHub (Jun 23, 2025).
Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/244

Hello! I see from the source code that only one kForwarderCoordinator warp (with target_rank = 0) per channel is actually used, so what is the function of other kForwarderCoordinator warps. Thanks a lot!

github.com/deepseek-ai/DeepEP@7b0c25f864/csrc/kernels/internode.cu (L375)

github.com/deepseek-ai/DeepEP@7b0c25f864/csrc/kernels/internode.cu (L807-L810)

Originally created by @ZhiyiHu1999 on GitHub (Jun 23, 2025). Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/244 Hello! I see from the source code that only one `kForwarderCoordinator` warp (with target_rank = 0) per channel is actually used, so what is the function of other `kForwarderCoordinator` warps. Thanks a lot! https://github.com/deepseek-ai/DeepEP/blob/7b0c25f864cc7a2d95d7e3c3c2b7c13b22116063/csrc/kernels/internode.cu#L375 https://github.com/deepseek-ai/DeepEP/blob/7b0c25f864cc7a2d95d7e3c3c2b7c13b22116063/csrc/kernels/internode.cu#L807-L810
bsakaguchi commented 2026-10-26 09:56:13 +00:00
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@LyricZhao commented on GitHub (Jun 23, 2025):

Just 1, the extra warps will exit at the beginning.

<!-- gh-comment-id:2994821001 --> @LyricZhao commented on GitHub (Jun 23, 2025): Just 1, the extra warps will exit at the beginning.
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