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[GH-ISSUE #472] Ask about the difference of bandwidth between dispatch and. combine #303

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opened 2026-10-26 09:58:15 +00:00 by bsakaguchi · 2 comments
bsakaguchi commented 2026-10-26 09:58:15 +00:00
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Originally created by @kzlxd on GitHub (Oct 30, 2025).
Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/472

Image As shown in the figure, the dispatch bandwidth and combine bandwidth of one node exhibit inconsistent performance with another node.
Originally created by @kzlxd on GitHub (Oct 30, 2025). Original GitHub issue: https://github.com/deepseek-ai/DeepEP/issues/472 <img width="2774" height="572" alt="Image" src="https://github.com/user-attachments/assets/bd531329-29d7-4e72-84e0-6804b400f95c" /> As shown in the figure, the dispatch bandwidth and combine bandwidth of one node exhibit inconsistent performance with another node.
bsakaguchi commented 2026-10-26 09:58:17 +00:00
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@goelayu commented on GitHub (Oct 30, 2025):

@kzlxd the dispatch and combine kernels are doing very different operations (apart from the network comms) so that impacts the overall bandwidth of the kernels.

<!-- gh-comment-id:3470013824 --> @goelayu commented on GitHub (Oct 30, 2025): @kzlxd the dispatch and combine kernels are doing very different operations (apart from the network comms) so that impacts the overall bandwidth of the kernels.
bsakaguchi commented 2026-10-26 09:58:17 +00:00
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@kzlxd commented on GitHub (Nov 2, 2025):

@goelayu thanks for your explaining

<!-- gh-comment-id:3477351621 --> @kzlxd commented on GitHub (Nov 2, 2025): @goelayu thanks for your explaining
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