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Tolerate Nsight Compute warning lines before the CSV header #141

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Merged
Laurawly merged 1 commit into from
May 28, 2026
Merged

Tolerate Nsight Compute warning lines before the CSV header #141

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13 changes: 12 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 @@ -351,7 +351,18 @@ def load_ncu_metrics(
if not csv_path.exists():
raise FileNotFoundError(f"CSV not found: {csv_path}")

df = pd.read_csv(csv_path, comment="=", low_memory=False)
# Nsight Compute may prepend warnings before the CSV header, for example
# when it cannot deploy section files under HOME. Find the real CSV header
# instead of letting pandas treat a warning line as the column list.
skiprows = 0
with csv_path.open() as f:
for line in f:
stripped = line.lstrip()
if stripped.startswith('"ID",') or stripped.startswith("ID,"):
break
skiprows += 1

df = pd.read_csv(csv_path, skiprows=skiprows, low_memory=False)

metric_cols = list(columns) if columns is not None else METRIC_COLUMNS
keep_cols: List[str] = []
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