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runtime: improve "P has cached GC work" debug info

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For #27993.

Change-Id: I20127e8a9844c2c488f38e1ab1f8f5a27a5df03e
Reviewed-on: https://go-review.googlesource.com/c/149968
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Austin Clements 2018-11-19 10:36:45 -05:00
parent 4a8ce14af9
commit b8fad4b33d
1 changed files with 13 additions and 0 deletions
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13
src/runtime/mgc.go
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@ -1934,6 +1934,19 @@ func gcMark(start_time int64) {
gcw := &p.gcw
if !gcw.empty() {
printlock()
print("runtime: P ", p.id, " flushedWork ", gcw.flushedWork)
if gcw.wbuf1 == nil {
print(" wbuf1=<nil>")
} else {
print(" wbuf1.n=", gcw.wbuf1.nobj)
}
if gcw.wbuf2 == nil {
print(" wbuf2=<nil>")
} else {
print(" wbuf2.n=", gcw.wbuf2.nobj)
}
print("\n")
throw("P has cached GC work at end of mark termination")
}
// There may still be cached empty buffers, which we