[None][infra] Set perf-sanity s_branch from the pipeline branch, not the Jenkins folder by chenfeiz0326 · Pull Request #18127 · NVIDIA/TensorRT-LLM

chenfeiz0326 · 2026-08-24T08:24:53Z

Summary

Added resolveBuildBranch(globalVars) as the shared branch resolver.
Published the resolved branch as globalVars["build_branch"].
Updated Docker builds and build_info.txt generation to use the resolved branch.
Updated get_job_info() to use globalVars["build_branch"].
Pre-merge records now use github-pr-<N>.
Post-merge records now use the actual release branch.
Documented the s_branch source and format.
Added regression tests for branch propagation and invalid metadata handling.
Existing records are not backfilled.

Dev Engineer Review

The branch value now has one source of truth.
The pipeline, Docker metadata, build_info.txt, and get_job_info() use the same value.
The change removes incorrect Jenkins folder-name parsing.
Missing or invalid branch metadata produces an empty branch in get_job_info().
The fallback to main remains limited to branch resolution when no GitLab branch is available.
No configuration files or test-list files changed.
No performance risks or unintended scope changes were identified.
End-to-end validation remains pending for the next post-merge release-branch build.
The failed L0_MergeRequest_PR CI pipeline requires review before another CI run.

QA Engineer Review

Added test functions in tests/unittest/others/test_perf_regression_branch.py:
- test_release_branch_survives_a_main_folder_job_url
- test_github_pr_branch_is_published_verbatim
- test_gitlab_mr_source_branch_is_published_verbatim
- test_main_branch_is_not_special_cased
- test_unpublished_branch_is_empty_never_guessed
- test_malformed_branch_is_empty_never_stringified
- test_branch_is_not_recovered_from_the_job_url
- test_unparsable_global_vars_does_not_raise
Modified test code in tests/integration/defs/perf/perf_regression_utils.py.
Updated documentation in tests/integration/defs/perf/README_perf_regression_system.md.
No corresponding entries were added to test-db/ or qa/.
Verdict: needs follow-up because CI coverage failed and end-to-end validation is pending.

Description

s_branch in the perf-sanity OpenSearch index is wrong for every row: it is always "main".

get_job_info() (tests/integration/defs/perf/perf_regression_utils.py) derived it by scraping the Jenkins job URL:

branch_match = re.search(r"/job/LLM/job/([^/]+)/job/", job_url)

That segment is the Jenkins folder the job definition lives in, not the branch being built. Every build jenkins/L0_MergeRequest.groovy drives lives in the LLM/main folder — including release-branch post-merge builds, which are selected by env.gitlabBranch, not by a per-branch job folder. So the expression is a constant.

Ground truth from the affected build's own artifact, llm-artifacts/LLM/main/L0_PostMerge/2911/build_info.txt:

commit=60ef710bfd08af3fc9ed42a86179816029973f15
branch=release/1.3.0rc22.post1
jenkins_url=.../job/LLM/job/main/job/L0_PostMerge/2911/

while OpenSearch holds s_branch="main" for that same s_commit.

Why this is not cosmetic. job_url contains L0_PostMerge, so such a row gets b_is_post_merge=True and passes the only filter the history query applies (get_history_data), and s_branch is not in match_keys — so release-branch data points join main's baseline and history for the same case. Release-vs-main deltas then read as main regressions, and can equally mask real ones. Downstream, anything keyed on s_branch is also wrong: consumers that format bisect inputs as {s_branch}@{s_commit} emit main@60ef710bfd08, a reference no branch contains.

Fix

Resolve the branch once, in the pipeline, and publish it — rather than having consumers re-derive it from a URL that cannot express it.

resolveBuildBranch() becomes the single source of truth. It replaces the 4-line idiom that was duplicated verbatim at three sites (both Build-Docker-Images stages and Upload Build Info).
The result is published as globalVars["build_branch"]. This channel was chosen because it already reaches pytest on every stage type: globalVars is serialized into every child job by launchJob, and globalVars is already in the SLURM --container-env allow-list in L0_Test.groovy. So this needs no new job parameter and no allow-list edit — either of which would have failed silently by dropping the value on one stage type.
build_info.txt now consumes the same published value, so it and s_branch cannot drift.
get_job_info() reads globalVars["build_branch"], with no fallback to the old regex: the regex cannot distinguish "no branch was published" from "the branch really is main", and a wrong branch is worse than an empty one for exactly the reason above.

Not refactored on purpose: the fourth env.gitlabBranch use, in the OSS Compliance (PLC) stage, must stay a checkout-able git ref and must not become a github-pr-<N> label.

Behavior change to be aware of

Pre-merge rows now carry s_branch="github-pr-<N>" instead of "main". That is the identifier the pipeline already uses for its image tags and writes into build_info.txt, so the row becomes directly comparable to its own build artifact. Pre-merge rows are excluded from history by the b_is_post_merge: True filter, so regression detection is unaffected.

Existing rows are not backfilled here. They can be audited without credentials by comparing each row's s_branch against {s_artifact_url}/build_info.txt.

Deliberately out of scope

Noted here for follow-up rather than bundled in:

is_post_merge is still inferred from a "PostMerge" in job_url substring test.
b_is_pr_job is written to every document and read nowhere.
When action_info.parents is empty, job_url / job_id stay empty with no fallback to BUILD_URL / JOB_NAME — which also empties s_artifact_url.

Test Coverage

No new automated test: the changed code is CI plumbing whose inputs (env.gitlabBranch, globalVars propagation through launchJob and --container-env) only exist inside a Jenkins run, and get_job_info() has no existing unit-test harness.

Verified statically instead:

Grepped every consumer of the perf-sanity s_branch. The only in-repo reader/writer is perf_regression_utils.py itself; jenkins/scripts/pulse_in_pipeline_scanning/* also has an s_branch but writes it to a different index from its own source, so it is unaffected.
Confirmed globalVars is passed to child jobs by launchJob (which filters only cached_changed_file_list) and is present in the envVarNames --container-env allow-list in jenkins/L0_Test.groovy, so the new key reaches pytest on both k8s and SLURM multi-node stages with no further change.
Confirmed the three replaced call sites were byte-identical, and that the two docker sites' derived branchTag = branch.replaceAll('/', '_') is unchanged.
ruff format --diff and ruff check clean on the edited Python file.

End-to-end confirmation is the next post-merge build on a release branch: its uploaded s_branch should equal the branch= line in that build's build_info.txt (previously main vs release/...).

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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coderabbitai · 2026-08-24T08:36:32Z

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Walkthrough

The Jenkins pipeline now resolves one shared build branch value. Docker jobs and build metadata use that value. Performance regression utilities read the published metadata instead of parsing Jenkins job URLs. Regression tests cover valid, missing, malformed, and unparsable branch metadata.

Changes

Build branch propagation

Layer / File(s)	Summary
Resolve and publish the build branch `jenkins/L0_MergeRequest.groovy`	The pipeline adds `BUILD_BRANCH` and `resolveBuildBranch(globalVars)`. Docker jobs and build metadata use the resolved value.
Use and validate the published branch `tests/integration/defs/perf/perf_regression_utils.py`, `tests/integration/defs/perf/README_perf_regression_system.md`, `tests/unittest/others/test_perf_regression_branch.py`	`get_job_info` reads string-valued `globalVars["build_branch"]`. Documentation defines the branch formats. Regression tests cover valid and invalid metadata.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: 🔵 Low · up to 4878c

The PR changes perf-sanity branch attribution from Jenkins-folder parsing to the pipeline-selected branch, improving release-branch data joins. It is mergeable with owner follow-up for a pre-merge branch-label documentation mismatch and a missing required copyright header; these are bounded risks rather than merge blockers.

Sequence Diagram(s)

sequenceDiagram
  participant JenkinsPipeline
  participant resolveBuildBranch
  participant DockerJobs
  participant PerformanceUtils
  JenkinsPipeline->>resolveBuildBranch: Resolve the build branch
  resolveBuildBranch-->>JenkinsPipeline: Return github-pr-N, GitLab branch, or main
  JenkinsPipeline->>DockerJobs: Pass BUILD_BRANCH
  JenkinsPipeline->>PerformanceUtils: Provide globalVars["build_branch"]
  PerformanceUtils->>PerformanceUtils: Set s_branch from build_branch

Suggested reviewers: brnguyen2, dpitman-nvda, qijune

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 63.64% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 11 functions across 1 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the infrastructure change and accurately states that perf-sanity s_branch now uses the pipeline branch instead of the Jenkins folder.
Description check	✅ Passed	The description is complete and relevant. It explains the problem, root cause, implementation, behavior changes, scope limits, test coverage, verification steps, and checklist status.
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.

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Inline comments:
In `@jenkins/L0_MergeRequest.groovy`:
- Around line 1621-1630: Update the branch-selection comments near the
single-source-of-truth logic and the corresponding README text to state that
GitHub pre-merge runs use the synthetic github-pr-&lt;N&gt; identifier only when
GITHUB_PR_API_URL is present; document that other non-post-merge runs fall back
to env.gitlabBranch or main, matching the implementation.

In `@tests/integration/defs/perf/perf_regression_utils.py`:
- Around line 65-78: Add CPU-only unit tests under tests/unittest/others/ for
get_job_info() verifying globalVars["build_branch"] propagation for
github-pr-&lt;N&gt;, release branches, missing values, and malformed inputs,
while preserving the existing empty-string behavior for absent or invalid
values.

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Inline comments:
In `@jenkins/L0_MergeRequest.groovy`:
- Around line 1615-1621: Update resolveBuildBranch to preserve the documented
github-pr-&lt;N&gt; format for GitLab merge requests when GITHUB_PR_API_URL is
absent, generating the synthetic identifier from the available GitLab
merge-request value instead of returning env.gitlabBranch; retain "main" only
when no pre-merge request is present.

In `@tests/integration/defs/perf/perf_regression_utils.py`:
- Around line 65-66: Update the build_branch handling to accept only string
values: preserve the value when it is a string and use an empty string for
missing or malformed values such as lists and dictionaries. Keep the existing
gitlabCommit retrieval unchanged, and add focused CPU-only coverage for GitHub
PR branches, release branches, missing values, and malformed values in the
relevant test suite and test list.

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In `@tests/integration/defs/perf/README_perf_regression_system.md`:
- Around line 43-45: Add the standard NVIDIA copyright header to
README_perf_regression_system.md and set its copyright year to the latest
meaningful modification year, preserving the existing document content.

In `@tests/unittest/others/test_perf_regression_branch.py`:
- Around line 56-119: Add type annotations to every test function shown in
test_perf_regression_branch.py, including the monkeypatch parameter and any
other parameters or return types as appropriate, while preserving the existing
test behavior and coverage.

Apply the same fix in `@tests/unittest/others/test_perf_regression_branch.py` at
line 42.

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…the Jenkins folder `get_job_info()` derived `s_branch` by scraping the Jenkins job URL: re.search(r"/job/LLM/job/([^/]+)/job/", job_url) That segment is the Jenkins *folder* the job definition lives in, not the branch being built. Every build `jenkins/L0_MergeRequest.groovy` drives lives in the `LLM/main` folder -- including release-branch post-merge builds, which are selected by `env.gitlabBranch` rather than by a per-branch job folder. So the expression yielded the constant `"main"` for every row the perf-sanity system uploads. Ground truth from the affected build's own artifact, `llm-artifacts/LLM/main/L0_PostMerge/2911/build_info.txt`: commit=60ef710bfd08af3fc9ed42a86179816029973f15 branch=release/1.3.0rc22.post1 jenkins_url=.../job/LLM/job/main/job/L0_PostMerge/2911/ while OpenSearch holds `s_branch="main"` for that same commit. This is not cosmetic. `job_url` contains `L0_PostMerge`, so such a row has `b_is_post_merge=True` and passes the only filter the history query applies; `s_branch` is not in `match_keys`, so release-branch points join main's baseline and history for the same case. Release-vs-main deltas then read as main regressions (and can mask real ones), and consumers that key off `s_branch` -- e.g. bisect inputs formatted as `{s_branch}@{s_commit}` -- produce references no branch contains. Fix: resolve the branch once in the pipeline and publish it, instead of having consumers re-derive it from a URL that cannot express it. - `resolveBuildBranch()` becomes the single source of truth, replacing the 4-line idiom that was duplicated verbatim at three sites (both Build-Docker-Images stages and Upload Build Info). - The result is published as `globalVars["build_branch"]`. `globalVars` is already serialized into every child job by `launchJob` and is already in the SLURM `--container-env` allow-list in `L0_Test.groovy`, so no new job parameter and no allow-list change is needed -- both of which would have failed silently by dropping the value. - `build_info.txt` now consumes the same published value, so it and `s_branch` cannot drift. - `get_job_info()` reads `globalVars["build_branch"]`, with no fallback to the old regex: it cannot distinguish "no branch was published" from "the branch really is main", and a wrong branch is worse than an empty one. For the same reason the value is taken only when it is a string -- an absent or malformed one becomes `""`, never a stringified `"['main']"`. Behavior change to be aware of: GitHub PR builds -- the ones that carry `github_pr_api_url` -- now upload `s_branch="github-pr-<N>"` instead of `"main"`, matching the identifier the pipeline already uses for image tags and `build_info.txt`. GitLab MR builds carry no `github_pr_api_url`, so they upload `env.gitlabBranch`, i.e. their source branch. Neither is a regression-detection change: pre-merge rows are excluded from history by the `b_is_post_merge: True` filter. It does make every row's `s_branch` directly comparable to its build's `build_info.txt`. Existing rows are not backfilled here. Deliberately out of scope, noted for follow-up: `is_post_merge` is still inferred from a substring of `job_url`; `b_is_pr_job` is written but read nowhere; and when `action_info.parents` is empty, `job_url`/`job_id` stay empty with no fallback to `BUILD_URL`/`JOB_NAME`. Signed-off-by: chenfeiz0326 <203214996+chenfeiz0326@users.noreply.github.com>

chenfeiz0326 · 2026-08-24T12:50:27Z

/bot run --disable-fail-fast

tensorrt-cicd · 2026-08-24T12:55:45Z

PR_Github #68825 [ run ] triggered by Bot. Commit: 5a220dc Link to invocation

tensorrt-cicd · 2026-08-24T15:58:16Z

PR_Github #68825 [ run ] completed with state SUCCESS. Commit: 5a220dc
/LLM/main/L0_MergeRequest_PR pipeline #56219 completed with status: 'FAILURE'

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Restores tests/unittest/others/test_perf_regression_branch.py, which the rewritten head had removed, so the GitHub PR, release, missing and malformed build_branch cases are exercised again. The module is loaded by file path with defs.trt_test_alternative and open_search_db_utils stubbed, so the case runs on a CPU-only host: importing defs.perf.perf_regression_utils normally would pull in defs/__init__.py's torch._inductor pre-import and the OpenSearch client, neither of which get_job_info reaches. Signed-off-by: chenfeiz0326 <203214996+chenfeiz0326@users.noreply.github.com>

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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
In `@tests/unittest/others/test_perf_regression_branch.py`:
- Around line 31-33: Apply Ruff formatting to the affected path-construction
statements in test_perf_regression_branch.py, ensuring the file matches the
formatter’s output and passes the pre-commit release check.

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The pre-commit release check runs ruff-format on this path (ruff hooks are denylist-gated on legacy_files, so a new file is in scope; yapf/isort are allowlist-gated on common_files and are not). The file had been formatted to yapf's 79-column style instead, which ruff reverses. Signed-off-by: chenfeiz0326 <203214996+chenfeiz0326@users.noreply.github.com>

chenfeiz0326 · 2026-08-25T08:25:06Z

/bot run --disable-fail-fast

tensorrt-cicd · 2026-08-25T08:32:05Z

PR_Github #69075 [ run ] triggered by Bot. Commit: 4878c41 Link to invocation

tensorrt-cicd · 2026-08-25T11:21:21Z

PR_Github #69075 [ run ] completed with state FAILURE. Commit: 4878c41
/LLM/main/L0_MergeRequest_PR pipeline #56447 completed with status: 'FAILURE'

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chenfeiz0326 · 2026-08-25T14:15:51Z

/bot skip --comment "Only update perf tests, no need to run the whole CI pipeline"

tensorrt-cicd · 2026-08-25T14:22:03Z

PR_Github #69132 [ skip ] triggered by Bot. Commit: 4878c41 Link to invocation

tensorrt-cicd · 2026-08-25T14:28:42Z

PR_Github #69132 [ skip ] completed with state SUCCESS. Commit: 4878c41
Skipping testing for commit 4878c41

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A perf test case was identified by a wide tuple of its config values -- 27 fields for aggregated runs (s_gpu_type, s_runtime + 15 server + 10 client), up to 46 for disaggregated. Most of those fields are tunables: knobs like l_max_batch_size, s_kv_cache_dtype, s_spec_decoding_type, l_force_num_accepted_tokens, l_iterations and b_streaming are adjusted specifically to improve perf on the same test. Changing one forked the case into a brand-new identity with an empty baseline, so the tuning's effect -- the reason for the change -- became invisible, and the case had to accrue three fresh data points before it could be gated again. The remaining fields are fixed parameters (l_isl, l_osl, l_concurrency, s_model_name, l_gpus, l_tp/ep/pp/cp, l_gpus_per_node). Those never change for a given case and are already encoded in s_test_case_name, so keying on them adds nothing. Key on the test case name instead, plus the three things the name does not carry: s_gpu_type (the same case name runs on more than one GPU type), s_runtime (the same case name runs on both aggr_server and multi_node_aggr_server) and s_branch. Validated against the live 90-day index (11,418 documents): grouping by name yields zero groups in which any fixed parameter varies (0/123 aggr, 0/85 multi-node aggr, 0/110 disagg), so the coarsening never merges two different tests. It does merge 37 groups that the old key had split on a tunable -- every one of them on l_force_num_accepted_tokens. 35 of the 37 keep an unchanged regression band; 2 shift, which is the expected one-off transient as a rejoined case's rolling baseline re-settles. s_benchmark_mode is deliberately not a match key. It is null on every aggregated record, and on disaggregated records it exactly equals the test case name's prefix (3036/3036 documents), so it carries no information the name does not. Adding it would also break matching against records written before the field existed, since benchmark_data_matches treats None and "e2e" as different values. Pre-merge branch substitution: s_branch is now a match key, and history queries are restricted to b_is_post_merge documents. A pre-merge run records s_branch = "github-pr-<N>", which has no post-merge history, so matching on it would return nothing and turn every pre-merge regression check into a silent no-op. process_and_upload_test_results therefore resolves a baseline branch (PERF_BASELINE_BRANCH, default "main") and substitutes it into a lookup-only copy of the data before get_common_values -- which must come first, since it feeds the OpenSearch must clause and would otherwise filter the history away before matching runs. The uploaded documents keep their true s_branch. Callers that do not key on s_branch (module perf, visual gen) are untouched. This completes the branch half of NVIDIA#18127, which fixed s_branch derivation but noted that s_branch was still absent from match_keys, leaving release-branch points joining main's baseline. Two pre-existing issues are resolved as side effects: - The gen_only filter dropping the ctx/gen transceiver backend from the key compared against "gen_s_cache_transceiver_backend" while the prefixing helper produces "s_gen_cache_transceiver_backend", so it never matched and was dead code. It is deleted along with the block it lived in. - world_size is read by jenkins/scripts/perf/submit.py to size the Slurm allocation but never parsed into ServerConfig, so a 1-GPU and a 4-GPU variant of the same config shared one baseline. Their names differ, so keying on the name separates them. world_size is still unparsed and would matter again if anything keyed on l_gpus. match_mode: "scenario" becomes inert -- not forking a case when knobs drift is now the default for every case. The option is still parsed so existing yamls stay valid; removing it from the ~30 configs that set it is left as a follow-up to keep this change to one concern. Signed-off-by: chenfeiz0326 <203214996+chenfeiz0326@users.noreply.github.com>

chenfeiz0326 requested review from a team as code owners August 24, 2026 08:24

chenfeiz0326 requested review from LarryXFly, QiJune, brnguyen2, dpitman-nvda, ruodil and yiqingy0 August 24, 2026 08:24

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Comment thread jenkins/L0_MergeRequest.groovy Resolved

Comment thread tests/integration/defs/perf/perf_regression_utils.py Resolved

chenfeiz0326 force-pushed the fix/perf-sanity-s-branch-from-gitlab-branch branch from 0708a2c to 0996c77 Compare August 24, 2026 08:46

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Comment thread jenkins/L0_MergeRequest.groovy Resolved

Comment thread tests/integration/defs/perf/perf_regression_utils.py Resolved

chenfeiz0326 force-pushed the fix/perf-sanity-s-branch-from-gitlab-branch branch from 0996c77 to 26d32e3 Compare August 24, 2026 09:05

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Comment thread tests/integration/defs/perf/README_perf_regression_system.md Resolved

Comment thread tests/unittest/others/test_perf_regression_branch.py Resolved

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chenfeiz0326 force-pushed the fix/perf-sanity-s-branch-from-gitlab-branch branch from 26d32e3 to 5a220dc Compare August 24, 2026 11:08

chenfeiz0326 enabled auto-merge (squash) August 24, 2026 12:38

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Comment thread tests/unittest/others/test_perf_regression_branch.py Resolved

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chenfeiz0326 merged commit cfc93d4 into NVIDIA:main Aug 25, 2026
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chenfeiz0326 mentioned this pull request Aug 30, 2026

[None][test] key perf-sanity case identity on test case name #18408

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chenfeiz0326 mentioned this pull request Oct 14, 2026

[https://nvbugs/6770503][test] Remove perf-sanity unit tests on release/1.3 #20287

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