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[DO NOT MERGE] H100 CAGRA hang: JIT cache, module loading, and library pin experiments - #2814

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bdice:ci-h100-hang-gpu-trace-3
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bdice wants to merge 22 commits into
NVIDIA:mainfrom
bdice:ci-h100-hang-gpu-trace-3

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@bdice

@bdice bdice commented Oct 10, 2026

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Diagnostic-only companion to #2809 for #2772 / #2732 (coordination: #2783). It runs the test_product_quantizer.py + test_cagra.py reproducer on 12.9.2, ubuntu24.04, h100 (595 driver), with one experiment per job:

  • cachenv: CUDA_CACHE_DISABLE=1, and ~/.nv is removed before every iteration.
  • cachecupy: CUPY_CACHE_IN_MEMORY=1, and ~/.cupy is removed before every iteration.
  • cachewarm: control. Before the loop, it runs a probe with CUDA_DISABLE_PTX_JIT=1 to find modules that need a PTX JIT.

After the first two iterations, each job lists the cache contents and the mangled kernel names found in them.

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@bdice

bdice commented Oct 10, 2026

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/ok to test 114e7ff

@bdice

bdice commented Oct 11, 2026

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/ok to test 9f47a7d

@bdice bdice changed the title [DO NOT MERGE] H100 CAGRA hang: JIT cache experiments [DO NOT MERGE] H100 CAGRA hang: JIT cache, module loading, and library pin experiments Oct 11, 2026
@bdice

bdice commented Oct 11, 2026

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Closing: this was a reproducer/diagnostic PR for workstream B (H100 hang) of #2783. The fix is in #2829.

@bdice bdice closed this Oct 11, 2026
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