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[cherry-pick]【main】patch sched_yield (#3648) (#3687)

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### What this PR does / why we need it?
On Arm systems, os.sched_yield() does not take effect, causing the GIL
(Global Interpreter Lock) to remain unrelinquished and resulting in CPU
bound issues. This PR applies a patch to sched_yield in vLLM, making the
process execute time.sleep(0) instead to release the GIL. ### Does this
PR introduce _any_ user-facing change?

Signed-off-by: fems14 <1804143737@qq.com>
Co-authored-by: fems14 <74094523+fems14@users.noreply.github.com>
This commit is contained in:
wangxiyuan
2025-10-24 00:24:58 +08:00
committed by GitHub
parent d0086d432a
commit b321e3846a
3 changed files with 15 additions and 0 deletions
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vllm_ascend/patch/platform/__init__.py
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@@ -19,6 +19,7 @@ import os
import vllm_ascend.patch.platform.patch_config # noqa
import vllm_ascend.patch.platform.patch_distributed # noqa
import vllm_ascend.patch.platform.patch_mamba_config # noqa
import vllm_ascend.patch.platform.patch_sched_yield # noqa
if os.getenv("DYNAMIC_EPLB", "false") == "true" or os.getenv(
"EXPERT_MAP_RECORD", "false") == "true":