fix(perf) skip to process nil ring

Signed-off-by: zhuhuijun <zhuhuijunzhj@gmail.com>
cilium · Jul 9, 2024 · e9ba616 · e9ba616
1 parent f2b2f6d
commit e9ba616
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diff --git a/.idea/.gitignore b/.idea/.gitignore
diff --git a/.idea/ebpf.iml b/.idea/ebpf.iml
diff --git a/.idea/vcs.xml b/.idea/vcs.xml
diff --git a/perf/reader.go b/perf/reader.go
@@ -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)
 			}