[BUG] conda-cpp-tests on gb300: routing PDP test hits illegal memory access, set_shmem_of_kernel fails after it
维护者通常 1 天内回复
评估
- 难度
- 4/5
- 预计耗时
- 1-2 天
- 新手友好度
- 48/100
- Issue 类型
- 缺陷
- 描述清晰度
- 基本清楚
- 活跃度
- 活跃
- 领域
- backend, testing-qa
调研方向
Start with the failing cost_boundary_initialization.pdp_set_route_data_resets_cost_boundaries test and the set_shmem_of_kernel tests in the routing test binary; the report says the latter failures may be fallout from a sticky CUDA error. Check the nightly run and reproduce on gb300 if available, then trace the illegal memory access in the PDP test. Done when the PDP test passes and the shared memory tests no longer see error 700.
由索引模型根据 Issue 内容生成。
描述
Describe the bug
In nightly run 40167716943 (2026-10-25, b5ad4d07), conda-cpp-tests / 13.3.0, 3.14, arm64, ubuntu26.04, gb300, latest-driver, latest-deps fails (job 121092087617). 3 routing tests fail, in every retry:
cost_boundary_initialization.pdp_set_route_data_resets_cost_boundaries: C++ exception fromcuda/__driver/driver_api.h:662,an illegal memory access was encounteredset_shmem_of_kernel.zero_request:cudaGetLastError()returns 700 (cudaErrorIllegalAddress), expectedcudaSuccess(set_shmem_of_kernel.cu:32)set_shmem_of_kernel.normal_request:set_shmem_of_kernel(kernel_normal, 4096)returns false (set_shmem_of_kernel.cu:38)
The two set_shmem_of_kernel failures look like fallout of the illegal access in the preceding PDP test: the sticky error 700 is still set when they run. Within the routing test binary, the other 57 tests pass.
- All 12 other
conda-cpp-testsjobs in the run passed. - The same commit passed on gb300 the next night (40277562656), so this is intermittent.
- This is not the failure set in #2176 (
pdlp_class,Population,ReducedMatrix). None of those tests failed in this run.
Expected behavior
cost_boundary_initialization.pdp_set_route_data_resets_cost_boundaries passes on gb300 as on the other GPUs.
Environment details
- Environment location: CI, gb300 arm64, CUDA 13.3.0, Python 3.14, ubuntu26.04, latest driver
- Method of cuOpt install: conda build from source (rattler-build)
Additional context
Related: #2176 (other gb300-only C++ test failures).
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