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perf: fix panic when CPU is offline #1503

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Merged
lmb merged 1 commit into from
Jul 9, 2024
Merged

perf: fix panic when CPU is offline #1503

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5 changes: 5 additions & 0 deletions perf/reader.go
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Original file line number Diff line number Diff line change
Expand Up @@ -386,6 +386,11 @@ func (pr *Reader) ReadInto(rec *Record) error {
// Waking up userspace is expensive, make the most of it by checking
// all rings.
for _, ring := range pr.rings {
// Skip rings that are not currently enabled.
if ring == nil {
continue
}

ring.loadHead()
pr.epollRings = append(pr.epollRings, ring)
}
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