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[fsdp,megatron,sglang] fix: Fix torch reduce to speed up update weights#2692

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vermouth1992 merged 4 commits intoverl-project:mainfrom
hebiao064:bhe/fix_torch_reduce
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[fsdp,megatron,sglang] fix: Fix torch reduce to speed up update weights#2692
vermouth1992 merged 4 commits intoverl-project:mainfrom
hebiao064:bhe/fix_torch_reduce

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@hebiao064 hebiao064 commented Jul 22, 2025

What does this PR do?

Speed up QWen3 MOE update weights from 110s to 37s

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo 82354186+SuperCB@users.noreply.github.com
Co-authored-by: GeLee 865038696@qq.com

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Code Review

This pull request aims to fix an issue with torch.reduce by updating the sglang serializer to TorchPatchMultiprocessingSerializer. The change seems correct and consistent. However, the PR also introduces a debugging statement (and False) in ray_trainer.py which disables pre-training validation. This needs to be removed before merging.

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@hebiao064 hebiao064 changed the title Fix torch reduce [fsdp.megatron,sglang] fix: Fix torch reduce to speed up update weights Jul 23, 2025
@hebiao064 hebiao064 changed the title [fsdp.megatron,sglang] fix: Fix torch reduce to speed up update weights [fsdp,megatron,sglang] fix: Fix torch reduce to speed up update weights Jul 23, 2025
from sglang.srt.utils import MultiprocessingSerializer

try:
from sglang.srt.utils import TorchPatchMultiprocessingSerializer as MultiprocessingSerializer
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Could you add a comment to show the corresponding sglang version of different APIs?

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i will add it once the sglang pr merged and version published, thanks for review

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Is there an ETA for PR merge and SGLang version release? Cc @zhaochenyang20

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@vermouth1992 vermouth1992 merged commit c95c9ef into verl-project:main Jul 23, 2025
47 of 51 checks passed
yellowbee686 pushed a commit to yellowbee686/verl that referenced this pull request Jul 25, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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oseyosey pushed a commit to oseyosey/verl that referenced this pull request Jul 28, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
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Juniper1021 pushed a commit to Juniper1021/verl that referenced this pull request Aug 7, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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whatadayG pushed a commit to whatadayG/verl that referenced this pull request Sep 5, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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chenjiaoAngel added a commit to chenjiaoAngel/verl that referenced this pull request Nov 14, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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TimurTaepov pushed a commit to giorgossideris/verl that referenced this pull request Dec 20, 2025
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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oseyosey pushed a commit to oseyosey/verl that referenced this pull request Jan 20, 2026
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>
vyomakesh0728 added a commit to vyomakesh0728/verl that referenced this pull request Jan 22, 2026
…ts (verl-project#2692)

### What does this PR do?

**Speed up QWen3 MOE update weights from 110s to 37s**

Related to : sgl-project/sglang#8267

Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>

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Co-authored-by: CuiBo <82354186+SuperCB@users.noreply.github.com>
Co-authored-by: GeLee <865038696@qq.com>
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