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Merge pull request #104211 from MikeSpreitzer/stackmore

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Increase debug logging in waitGroupCounter::Add
This commit is contained in:
Kubernetes Prow Robot 2021-08-31 01:45:37 -07:00 committed by GitHub
commit f610eee161
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1 changed files with 43 additions and 11 deletions
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54
staging/src/k8s.io/apiserver/pkg/util/flowcontrol/fairqueuing/testing/eventclock/fake.go
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@ -18,8 +18,10 @@ package eventclock
import (
"container/heap"
"fmt"
"math/rand"
"runtime"
"strconv"
"strings"
"sync"
"time"
@ -43,24 +45,54 @@ var _ counter.GoRoutineCounter = (*waitGroupCounter)(nil)
func (wgc *waitGroupCounter) Add(delta int) {
if klog.V(7).Enabled() {
var pcs [5]uintptr
var pcs [10]uintptr
nCallers := runtime.Callers(2, pcs[:])
frames := runtime.CallersFrames(pcs[:nCallers])
frame1, more1 := frames.Next()
fileParts1 := strings.Split(frame1.File, "/")
tail2 := "(none)"
line2 := 0
if more1 {
frame2, _ := frames.Next()
fileParts2 := strings.Split(frame2.File, "/")
tail2 = fileParts2[len(fileParts2)-1]
line2 = frame2.Line
callers := make(stackExcerpt, 0, 10)
more := frames != nil
boundary := 1
for i := 0; more && len(callers) < cap(callers); i++ {
var frame runtime.Frame
frame, more = frames.Next()
fileParts := strings.Split(frame.File, "/")
isMine := strings.HasSuffix(frame.File, "/fairqueuing/eventclock/testing/fake.go")
if isMine {
boundary = 2
}
callers = append(callers, stackFrame{file: fileParts[len(fileParts)-1], line: frame.Line})
if i >= boundary && !isMine {
break
}
}
klog.Infof("GRC(%p).Add(%d) from %s:%d from %s:%d", wgc, delta, fileParts1[len(fileParts1)-1], frame1.Line, tail2, line2)
klog.InfoS("Add", "counter", fmt.Sprintf("%p", wgc), "delta", delta, "callers", callers)
}
wgc.wg.Add(delta)
}
type stackExcerpt []stackFrame
type stackFrame struct {
file string
line int
}
var _ fmt.Stringer = stackExcerpt(nil)
func (se stackExcerpt) String() string {
var sb strings.Builder
sb.WriteString("[")
for i, sf := range se {
if i > 0 {
sb.WriteString(", ")
}
sb.WriteString(sf.file)
sb.WriteString(":")
sb.WriteString(strconv.FormatInt(int64(sf.line), 10))
}
sb.WriteString("]")
return sb.String()
}
func (wgc *waitGroupCounter) Wait() {
wgc.wg.Wait()
}