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Merged
merged 4 commits into from
May 2, 2025
Merged

[BugFix] Fix Memory Leak #17567

merged 4 commits into from
May 2, 2025
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robertgshaw2-redhat
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@robertgshaw2-redhat robertgshaw2-redhat commented May 2, 2025 •
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github-actions bot commented May 2, 2025

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@mergify mergify bot added the v1 label May 2, 2025
comaniac
comaniac reviewed May 2, 2025
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Thanks for locating the memory leak and the fix!

vllm/v1/core/sched/scheduler.py Outdated
Comment on lines 767 to 770
# NOTE(rob): since we free stopped reqs above, adding stopped reqs
# to _cached_reqs_data will cause a memory leak.
if req_data.req_id not in stopped_set:
self._cached_reqs_data[req_data.req_id].append(req_data)
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Can we just do the following so that we don't need to introduce stopped_set?

if req_data.req_id in self._cached_reqs_data:
    self._cached_reqs_data[req_data.req_id].append(req_data)

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I don't think that would work unless line 541 is changed from self._cached_reqs_data.get(request.request_id) to self._cached_reqs_data[request.request_id].

Alternatively I think you could use if req_data.req_id not in self.finished_req_ids to avoid having a new set.

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good idea

@DarkLight1337 DarkLight1337 added the ready ONLY add when PR is ready to merge/full CI is needed label May 2, 2025
@vllm-bot vllm-bot merged commit c777df7 into vllm-project:main May 2, 2025
66 of 68 checks passed
radeksm pushed a commit to radeksm/vllm that referenced this pull request May 2, 2025
@robertgshaw2-redhat @radeksm
[BugFix] Fix Memory Leak (vllm-project#17567)
1434b45 
Signed-off-by: [email protected] <[email protected]>
simon-mo pushed a commit that referenced this pull request May 2, 2025
@robertgshaw2-redhat @simon-mo
[BugFix] Fix Memory Leak (#17567)
edb5286 
Signed-off-by: [email protected] <[email protected]>
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any plans to fix in V0? batching with phi mini (3.5 and 4), lora_enabled - V0 showed degraded performance yesterday, responses showing signs of context from other prompts

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nFunctor commented May 5, 2025

@nightflight-dk sorry for a sidetrack, but I wanted to clarify since I don't understand the issue well here, do you mean that the chunked prefill, if enabled in V0, potentially leads to prompt mixing? There was a phenomenon like that for prefix caching due to hash function's behaviour in python 3.12 #12621 , but it got fixed for me in 0.7.2.

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xiamuyingu commented May 7, 2025 •
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Is it means that if I upgrade vllm to v0.8.5.post1, and use option "--enable-prefix-caching" when start a model service, it will not have memory leak, right?

RichardoMrMu pushed a commit to RichardoMrMu/vllm that referenced this pull request May 12, 2025
@robertgshaw2-redhat
[BugFix] Fix Memory Leak (vllm-project#17567)
7e318ba 
Signed-off-by: [email protected] <[email protected]>
Signed-off-by: Mu Huai <[email protected]>
dtrifiro pushed a commit to red-hat-data-services/vllm that referenced this pull request May 13, 2025
@robertgshaw2-redhat @heyselbi
[BugFix] Fix Memory Leak (vllm-project#17567)
e335c34 
Signed-off-by: [email protected] <[email protected]>
dtrifiro pushed a commit to red-hat-data-services/vllm that referenced this pull request May 13, 2025
@andy-neuma
Sync midstream to upstream v0.8.5.post1 (opendatahub-io#218)
7db80a0 
Syncing midstream NM fork to Upstream tag of
[v0.8.5.post1](https://github.com/vllm-project/vllm/tree/v0.8.5.post1) +
cherry pick of
vllm-project@be633fb
needed for benchmarks +
[CP](neuralmagic/nm-vllm-ent@1fe447d)
for compressed tensor bump +
[CP](vllm-project#17677) for lora on AMD +
[CP](vllm-project#17315) for llama4 w/ pure
dense layers

```
commit 31c73ba (HEAD -> upstream-v0.8.5, nm-fork/upstream-v0.8.5)
Author: Chauncey <[email protected]>
Date:   Wed Apr 30 15:11:04 2025 +0800

    [Bugfix] Fix AttributeError: 'State' object has no attribute 'engine_client' (vllm-project#17434)
    
    Signed-off-by: chaunceyjiang <[email protected]>

commit f8db0bd
Author: Lucas Wilkinson <[email protected]>
Date:   Fri May 2 14:01:38 2025 -0400

    [BugFix][Attention] Fix sliding window attention in V1 giving incorrect results (vllm-project#17574)
    
    Signed-off-by: Lucas Wilkinson <[email protected]>

commit e335c34
Author: Robert Shaw <[email protected]>
Date:   Fri May 2 04:07:03 2025 -0400

    [BugFix] Fix Memory Leak (vllm-project#17567)
    
    Signed-off-by: [email protected] <[email protected]>

commit cc463fe
Merge: 1e358ff ba41cc9
Author: Selbi Nuryyeva <[email protected]>
Date:   Tue Apr 29 12:34:57 2025 -0400

    Merge branch 'tag-upstream-v0.8.5' into upstream-v0.8.5

commit ba41cc9 (tag: v0.8.5, tag-upstream-v0.8.5)
Author: Michael Goin <[email protected]>
Date:   Mon Apr 28 16:20:24 2025 -0600

    [Model] Add tuned triton fused_moe configs for Qwen3Moe (vllm-project#17328)
    
    Signed-off-by: mgoin <[email protected]>

commit dcbac4c
Author: Simon Mo <[email protected]>
Date:   Mon Apr 28 14:12:01 2025 -0700

    [Model] Qwen3 Dense FP8 Compat Fixes (vllm-project#17318)
    
    Signed-off-by: simon-mo <[email protected]>
[...]
```

Commands
```
git fetch upstream
git checkout -b upstream-v0.8.5
git merge upstream/v0.8.5
git cherry-pick be633fb
```

TEST PLAN
accept sync:
https://github.com/neuralmagic/nm-cicd/actions/runs/14841223552
related PR in cicd: neuralmagic/nm-cicd#99
release workflow:
https://github.com/neuralmagic/nm-cicd/actions/runs/14845693864
mawong-amd pushed a commit to ROCm/vllm that referenced this pull request May 14, 2025
@robertgshaw2-redhat @mawong-amd
[BugFix] Fix Memory Leak (vllm-project#17567)
0570648 
Signed-off-by: [email protected] <[email protected]>
@ckhordiasma ckhordiasma mentioned this pull request May 14, 2025
Merged
@robertgshaw2-redhat
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V0

This issue does not impact V0. Its related to the V1 scheduler

zzzyq pushed a commit to zzzyq/vllm that referenced this pull request May 24, 2025
@robertgshaw2-redhat
[BugFix] Fix Memory Leak (vllm-project#17567)
7828ce2 
Signed-off-by: [email protected] <[email protected]>
Signed-off-by: Yuqi Zhang <[email protected]>
minpeter pushed a commit to minpeter/vllm that referenced this pull request Jun 24, 2025
@robertgshaw2-redhat @minpeter
[BugFix] Fix Memory Leak (vllm-project#17567)
2f3cc4d 
Signed-off-by: [email protected] <[email protected]>
Signed-off-by: minpeter <[email protected]>
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@robertgshaw2-redhat @nightflight-dk @nFunctor @xiamuyingu @comaniac @njhill @DarkLight1337 @vllm-bot