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[nvbugs/5369799] fix: Update disaggregation handling in sampler #5762

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@stnie stnie commented Jul 4, 2025

  • Set is_disagg in TRTLLMSampler to False by default.
  • Modify sequence length calculation to consider is_disagg when determining overlap behavior in the sampling process.
  • Ensure kv_cache_transceiver presence updates sampler.is_disagg in the executor instance creation.

Description

Hotfix to solve [nvbugs/5369799] :
Using Overlap scheduler with Stop words, should now correctly no longer output the last token twice

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- Set `is_disagg` in `TRTLLMSampler` to False by default.
- Modify sequence length calculation to consider `is_disagg` when determining overlap behavior in the sampling process.
- Ensure `kv_cache_transceiver` presence updates `sampler.is_disagg` in the executor instance creation.

Signed-off-by: Stefan Niebler <82932102+stnie@users.noreply.github.com>
@stnie stnie force-pushed the bugfix/5369799 branch from 16af977 to f743914 Compare July 4, 2025 13:35
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stnie commented Jul 4, 2025

/bot run

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PR_Github #11013 [ run ] triggered by Bot

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PR_Github #11013 [ run ] completed with state SUCCESS
/LLM/main/L0_MergeRequest_PR pipeline #8138 completed with status: 'SUCCESS'
Pipeline passed with automatic retried tests. Check the rerun report for details.

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