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[None][perf] Validate GPT-OSS transceiver v2 performance#15765

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nv-xtf merged 3 commits into
NVIDIA:mainfrom
nv-xtf:perf/gpt-oss-transceiver-v2
Jul 7, 2026
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[None][perf] Validate GPT-OSS transceiver v2 performance#15765
nv-xtf merged 3 commits into
NVIDIA:mainfrom
nv-xtf:perf/gpt-oss-transceiver-v2

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@nv-xtf nv-xtf commented Jun 30, 2026

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Description

Migrate existing NIXL-based GPT-OSS disaggregated tests from Transceiver V1 to V2 (transceiver_runtime: PYTHON).

This PR updates the accuracy, stress, and performance test configurations. Performance tests continue to use KV cache manager v1. A separate V1 test lane is not retained.

Performance Validation

Run the existing GB200 GPT-OSS perf-sanity cases and compare the V2 pre-merge results with the historical V1 post-merge baseline.

Performance results

  • No regression was observed in the two E2E cases.
  • No V2-specific regression was observed in the generation-performance cases.
  • The 1k1k con64 result matches the post-merge level observed after its
    June 29 unwaive, indicating that its stored baseline is stale.

PR Checklist

Please review the following before submitting your PR:

  • PR description clearly explains what and why. If using CodeRabbit's summary, please make sure it makes sense.

  • PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.

  • Test cases are provided for new code paths (see test instructions)

  • If PR introduces API changes, an appropriate PR label is added - either api-compatible or api-breaking. For api-breaking, include BREAKING in the PR title.

  • Any new dependencies have been scanned for license and vulnerabilities

  • CODEOWNERS updated if ownership changes

  • Documentation updated as needed

  • Update tava architecture diagram if there is a significant design change in PR.

  • The reviewers assigned automatically/manually are appropriate for the PR.

  • Please check this after reviewing the above items as appropriate for this PR.

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Summary by CodeRabbit

  • Tests
    • Updated several performance sanity benchmark configurations to explicitly use the legacy KV cache manager setting and set cache transceiver runtime to Python for both generation and context workers.
    • Applied these settings across multiple disaggregated benchmark scenarios to keep test runs consistent.

@nv-xtf nv-xtf changed the title perf/gpt-oss-transceiver-v2 [None][perf] Validate GPT-OSS transceiver v2 performance Jun 30, 2026
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/bot run --stage-list "GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4"

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PR_Github #56561 [ run ] triggered by Bot. Commit: 0879b1b Link to invocation

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PR_Github #56561 [ run ] completed with state SUCCESS. Commit: 0879b1b
/LLM/main/L0_MergeRequest_PR pipeline #45396 (Partly Tested) completed with status: 'SUCCESS'

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@nv-xtf nv-xtf force-pushed the perf/gpt-oss-transceiver-v2 branch from 42b8d28 to 6ccaf61 Compare July 2, 2026 05:46
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Review Change Stack

📝 Walkthrough

Walkthrough

Seven disaggregated perf-sanity benchmark YAML configuration files are updated to explicitly set use_kv_cache_manager_v2: false in kv_cache_config and transceiver_runtime: PYTHON in cache_transceiver_config for both gen and ctx worker sections.

Changes

Disaggregated perf-sanity YAML config updates

Layer / File(s) Summary
KV cache manager and transceiver runtime overrides
tests/scripts/perf-sanity/disaggregated/gb200_gpt-oss-120b-fp4_1k1k_con2048_...NIXL.yaml, ..._1k1k_con512_...NIXL.yaml, ..._1k1k_con64_...NIXL.yaml, ..._8k1k_con1024_...NIXL.yaml, ..._8k1k_con128_...NIXL.yaml, ..._8k1k_con4_...NIXL.yaml, ..._8k1k_con512_...NIXL.yaml
Each file adds use_kv_cache_manager_v2: false under worker_config.gen.kv_cache_config and worker_config.ctx.kv_cache_config, and adds transceiver_runtime: PYTHON under worker_config.gen.cache_transceiver_config and worker_config.ctx.cache_transceiver_config.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Possibly related PRs

  • NVIDIA/TensorRT-LLM#14933: Both PRs configure use_kv_cache_manager_v2 and cache_transceiver_config.transceiver_runtime in disaggregated test YAML configs.

Suggested reviewers: Tabrizian, schetlur-nv, chang-l, kaiyux

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Title check ✅ Passed The title matches the PR’s main focus on validating GPT-OSS transceiver v2 performance in perf-sanity configs.
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Description check ✅ Passed The PR description follows the template well and clearly states the change, validation, and checklist, with only the Test Coverage section omitted.
✨ Finishing Touches
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/bot run --stage-list "GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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PR_Github #57139 [ run ] triggered by Bot. Commit: 6ccaf61 Link to invocation

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PR_Github #57139 [ run ] completed with state SUCCESS. Commit: 6ccaf61
/LLM/main/L0_MergeRequest_PR pipeline #45921 (Partly Tested) completed with status: 'FAILURE'

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/bot run --stage-list "GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-6,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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PR_Github #57157 [ run ] triggered by Bot. Commit: 6ccaf61 Link to invocation

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PR_Github #57157 [ run ] completed with state FAILURE. Commit: 6ccaf61
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/bot run --stage-list "GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-6,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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PR_Github #57306 [ run ] triggered by Bot. Commit: 6ccaf61 Link to invocation

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PR_Github #57306 [ run ] completed with state FAILURE. Commit: 6ccaf61
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@nv-xtf nv-xtf force-pushed the perf/gpt-oss-transceiver-v2 branch from 6ccaf61 to 7a77462 Compare July 3, 2026 02:33
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/bot run --stage-list "GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-6,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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PR_Github #57320 [ run ] completed with state FAILURE. Commit: 7a77462
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nv-xtf added 2 commits July 6, 2026 11:14
Signed-off-by: Tingfeng Xian <289617005+nv-xtf@users.noreply.github.com>
…iver v2

Signed-off-by: Tingfeng Xian <289617005+nv-xtf@users.noreply.github.com>
@nv-xtf nv-xtf force-pushed the perf/gpt-oss-transceiver-v2 branch from 7a77462 to 6199434 Compare July 6, 2026 03:16
Shixiaowei02 added a commit to Shixiaowei02/TensorRT-LLM that referenced this pull request Jul 6, 2026
Enable KV cache manager v1 (use_kv_cache_manager_v2: false) and NIXL
transceiver v2 Python runtime (transceiver_runtime: PYTHON) for both
context and generation workers across the Kimi-K2.5-thinking-fp4
disaggregated perf-sanity configs on GB200 and GB300, mirroring the
GPT-OSS validation in PR NVIDIA#15765.

Signed-off-by: Shixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>
…iver v2

Signed-off-by: Tingfeng Xian <289617005+nv-xtf@users.noreply.github.com>
@nv-xtf nv-xtf requested review from a team as code owners July 6, 2026 07:51
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/bot run --stage-list "DGX_B200-4_GPUs-PyTorch-1,DGX_B200-4_GPUs-PyTorch-2,DGX_B200-4_GPUs-PyTorch-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-"

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PR_Github #57728 [ run ] triggered by Bot. Commit: aaae166 Link to invocation

@nv-xtf nv-xtf requested review from Shixiaowei02 and chuangz0 July 6, 2026 08:03
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PR_Github #57728 [ run ] completed with state SUCCESS. Commit: aaae166
/LLM/main/L0_MergeRequest_PR pipeline #46437 (Partly Tested) completed with status: 'FAILURE'

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/bot run --stage-list "DGX_B200-4_GPUs-PyTorch-1,DGX_B200-4_GPUs-PyTorch-2,DGX_B200-4_GPUs-PyTorch-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-"

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PR_Github #57885 [ run ] completed with state FAILURE. Commit: aaae166
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/bot run --stage-list "DGX_B200-4_GPUs-PyTorch-1,DGX_B200-4_GPUs-PyTorch-2,DGX_B200-4_GPUs-PyTorch-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-6,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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/bot kill

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PR_Github #57953 [ kill ] triggered by Bot. Commit: aaae166 Link to invocation

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PR_Github #57894 [ run ] completed with state ABORTED. Commit: aaae166

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PR_Github #57953 [ kill ] completed with state SUCCESS. Commit: aaae166
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/bot run --stage-list "DGX_B200-4_GPUs-PyTorch-1,DGX_B200-4_GPUs-PyTorch-2,DGX_B200-4_GPUs-PyTorch-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU2-Post-Merge-4,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-1,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-2,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-3,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-6,GB200-8_GPUs-2_Nodes-PyTorch-Disagg-PerfSanity-CTX1-NODE1-GPU1-GEN1-NODE1-GPU4-Post-Merge-7"

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PR_Github #57959 [ run ] completed with state SUCCESS. Commit: aaae166
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One question on the perf disagg configs before this merges.

Under tests/scripts/perf/disaggregated/ there are two gpt-oss UCX variants that this PR (correctly) leaves untouched, since transceiver_runtime: PYTHON is only valid for the DEFAULT/NIXL backends and would raise ValueError under UCX:

  • gb200_gpt-oss-120b-fp4_1k1k_con2048_ctx1_tp1_gen1_dep2_eplb0_mtp0_ccb-UCX.yaml
  • gb200_gpt-oss-120b-fp4_8k1k_con1024_ctx1_tp1_gen1_tp4_eplb0_mtp0_ccb-UCX.yaml

The net effect is that after this PR the gpt-oss perf coverage is split: the NIXL cases move to the V2 / PYTHON transceiver, while these two UCX cases stay on CPP / KV cache v1.

Is keeping these UCX variants intentional (we still want CPP/UCX perf coverage for gpt-oss), or should they be removed so gpt-oss perf standardizes on the NIXL + PYTHON path? Just want to confirm this split is deliberate and not an oversight.

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Approved.

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/bot skip --comment "Targeted GPT-OSS Harmony and perf-sanity tests passed."

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PR_Github #57977 [ skip ] triggered by Bot. Commit: aaae166 Link to invocation

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PR_Github #57977 [ skip ] completed with state SUCCESS. Commit: aaae166
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@nv-xtf nv-xtf merged commit ce67288 into NVIDIA:main Jul 7, 2026
10 checks passed
Shixiaowei02 added a commit to Shixiaowei02/TensorRT-LLM that referenced this pull request Jul 8, 2026
Enable the NIXL transceiver v2 Python runtime (transceiver_runtime:
PYTHON) for both context and generation workers across the
Kimi-K2.5-thinking-fp4 disaggregated perf-sanity configs on GB200 and
GB300, mirroring the GPT-OSS validation in PR NVIDIA#15765. KV cache manager
v2 (the default) is kept enabled.

Signed-off-by: Shixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>
Shixiaowei02 added a commit to Shixiaowei02/TensorRT-LLM that referenced this pull request Jul 8, 2026
Enable the NIXL transceiver v2 Python runtime (transceiver_runtime:
PYTHON) for both context and generation workers across the
Kimi-K2.5-thinking-fp4 disaggregated perf-sanity configs on GB200 and
GB300, mirroring the GPT-OSS validation in PR NVIDIA#15765. KV cache manager
v2 (the default) is kept enabled.

Signed-off-by: Shixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>
BrianLi23 pushed a commit to BrianLi23/TensorRT-LLM that referenced this pull request Jul 9, 2026
Signed-off-by: Tingfeng Xian <289617005+nv-xtf@users.noreply.github.com>
Shixiaowei02 added a commit to Shixiaowei02/TensorRT-LLM that referenced this pull request Jul 9, 2026
Enable the NIXL transceiver v2 Python runtime (transceiver_runtime:
PYTHON) for both context and generation workers across the
Kimi-K2.5-thinking-fp4 disaggregated perf-sanity configs on GB200 and
GB300, mirroring the GPT-OSS validation in PR NVIDIA#15765. KV cache manager
v2 (the default) is kept enabled.

Signed-off-by: Shixiaowei02 <39303645+Shixiaowei02@users.noreply.github.com>
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