add --bind_cores_to_rank to zero offload tutorial #7474
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tjruwase
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Aug 8, 2025
tjruwase
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Aug 8, 2025
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In ZeRO offload, significant time is spent on CPUAdam, which is CPU code. Thus use `--bind_cores_to_rank` in deepspeed launch command would help improve the performance of ZeRO offload. This PR add this command to ZeRO offload tutorial to increase user awareness. For Qwen2.5-3B finetuning on 2 A100-40B cards, running on CPU host with 128 CPU cores, the average step time is as follow, near 1.3x performance improvement: without `--bind_cores_to_rank`: 3084.44ms per step with `--bind_cores_to_rank`: 2383.16ms per step --------- Co-authored-by: Olatunji Ruwase <tjruwase@gmail.com> Signed-off-by: lym <letusgo126@126.com>
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In ZeRO offload, significant time is spent on CPUAdam, which is CPU code. Thus use
--bind_cores_to_rankin deepspeed launch command would help improve the performance of ZeRO offload. This PR add this command to ZeRO offload tutorial to increase user awareness.For Qwen2.5-3B finetuning on 2 A100-40B cards, running on CPU host with 128 CPU cores, the average step time is as follow, near 1.3x performance improvement:
without
--bind_cores_to_rank: 3084.44ms per stepwith
--bind_cores_to_rank: 2383.16ms per step