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Add interface to set NCCL options of each process group #7923

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merged 2 commits into from
Dec 4, 2023

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erhoo82
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@erhoo82 erhoo82 commented Nov 21, 2023

What does this PR do ?

Add interface to set NCCL options of each process group. Can pass a path to yaml file that can specify the NCCL options (min_ctas, max_ctas, cga_cluster_size) for each process group.

Below shows an example yaml file that specifies config of data-parallel, pipeline-parallel, and tensor-parallel proc groups.

dp:                                                                                       
  min_ctas: 4                                                                             
  max_ctas: 4                                                                             
pp:                                                                                       
  min_ctas: 2                                                                             
  max_ctas: 2                                                                             
tp:                                                                                       
  min_ctas: 24                                                                            
  max_ctas: 24                                                                            

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  • Add specific line by line info of high level changes in this PR.

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@ericharper
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jenkins

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@ericharper ericharper left a comment

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LGTM. Thanks!

@erhoo82
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erhoo82 commented Dec 2, 2023

@athitten Please review and merge

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LGTM, thanks!

@athitten athitten merged commit 110c9d7 into NVIDIA:main Dec 4, 2023
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@erhoo82 erhoo82 deleted the slym/pg_group branch January 2, 2024 01:49
pzelasko pushed a commit to pzelasko/NeMo that referenced this pull request Jan 3, 2024
Signed-off-by: Sangkug Lym <[email protected]>
Co-authored-by: Eric Harper <[email protected]>
Signed-off-by: Piotr Żelasko <[email protected]>
ssh-meister pushed a commit to ssh-meister/NeMo that referenced this pull request Feb 15, 2024
Signed-off-by: Sangkug Lym <[email protected]>
Co-authored-by: Eric Harper <[email protected]>
Signed-off-by: Sasha Meister <[email protected]>
rohitrango pushed a commit to rohitrango/NeMo that referenced this pull request Jun 25, 2024
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3 participants