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Fix NCU profiling under Buck PAR via KERNEL_PROFILER_PYTHON #137

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Merged
Jack-Khuu merged 1 commit into from
May 19, 2026
Merged

Fix NCU profiling under Buck PAR via KERNEL_PROFILER_PYTHON #137

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7 changes: 6 additions & 1 deletion kernel_perf_agent/kernel_opt/profiler/ncu_profiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,12 @@ def profile_triton_kernel(

# Resolve paths
if python_executable is None:
python_executable = sys.executable
# Generic override hook: a wrapping environment (e.g. a packaged
# launcher that re-establishes its own runtime env vars) can set
# KERNEL_PROFILER_PYTHON to a Python entrypoint more appropriate for
# spawning torch-importable subprocesses than `sys.executable`.
# Falls back to `sys.executable` when unset.
python_executable = os.environ.get("KERNEL_PROFILER_PYTHON") or sys.executable

if ncu_bin is None:
ncu_bin = shutil.which("ncu") or "/usr/local/cuda/bin/ncu"
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