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Fix parsing of dmesg line to retrieve # of ARM counters #529

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Merged
harp-intel merged 2 commits into from
Oct 30, 2025
Merged

Fix parsing of dmesg line to retrieve # of ARM counters #529

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5aed584
Fix parsing of dmesg line to retrieve # of ARM counters
harp-intel Oct 30, 2025
3237cda
Merge branch 'main' into armdmesg
harp-intel Oct 30, 2025
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7 changes: 5 additions & 2 deletions cmd/metrics/metadata.go
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Original file line number Diff line number Diff line change
Expand Up @@ -829,8 +829,11 @@ func getNumGPCountersARM(target target.Target) (numGPCounters int, err error) {
err = fmt.Errorf("failed to get PMU Driver line: %s, %d, %v", stderr, exitcode, err)
return
}
// example [ 1.339550] hw perfevents: enabled with armv8_pmuv3_0 PMU driver, 5 counters available
counterRegex := regexp.MustCompile(`(\d+) counters available`)
// examples:
// [ 1.339550] hw perfevents: enabled with armv8_pmuv3_0 PMU driver, 5 counters available
// [ 3.663956] hw perfevents: enabled with armv8_pmuv3_0 PMU driver, 6 (0,8000001f) counters available
// regex to match both "5 counters available" and "6 (0,8000001f) counters available"
counterRegex := regexp.MustCompile(`(\d+)\s*(?:\([^)]+\))?\s+counters available`)
matches := counterRegex.FindStringSubmatch(stdout)
if len(matches) > 1 {
numberStr := matches[1]
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