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| author | Michael Anthony Knyszek <mknyszek@google.com> | 2020-08-06 21:59:13 +0000 |
|---|---|---|
| committer | Michael Knyszek <mknyszek@google.com> | 2020-10-26 21:47:54 +0000 |
| commit | d39a89fd5843f535d634620d27110b320431f584 (patch) | |
| tree | d44fd02351cc88c0d28e48465a3e5ac3bd056ff9 /src/runtime/mgc.go | |
| parent | 36c5edd8d9e6c13af26733e5c820eae0598203fe (diff) | |
| download | go-d39a89fd5843f535d634620d27110b320431f584.tar.gz go-d39a89fd5843f535d634620d27110b320431f584.zip | |
runtime,runtime/metrics: add metric for distribution of GC pauses
For #37112.
Change-Id: Ibb0425c9c582ae3da3b2662d5bbe830d7df9079c
Reviewed-on: https://go-review.googlesource.com/c/go/+/247047
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Michael Pratt <mpratt@google.com>
Diffstat (limited to 'src/runtime/mgc.go')
| -rw-r--r-- | src/runtime/mgc.go | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/runtime/mgc.go b/src/runtime/mgc.go index 540c376f1c..b0ab0ae6bb 100644 --- a/src/runtime/mgc.go +++ b/src/runtime/mgc.go @@ -1418,6 +1418,7 @@ func gcStart(trigger gcTrigger) { now = startTheWorldWithSema(trace.enabled) work.pauseNS += now - work.pauseStart work.tMark = now + memstats.gcPauseDist.record(now - work.pauseStart) }) // Release the world sema before Gosched() in STW mode @@ -1565,6 +1566,7 @@ top: systemstack(func() { now := startTheWorldWithSema(true) work.pauseNS += now - work.pauseStart + memstats.gcPauseDist.record(now - work.pauseStart) }) semrelease(&worldsema) goto top @@ -1677,6 +1679,7 @@ func gcMarkTermination(nextTriggerRatio float64) { unixNow := sec*1e9 + int64(nsec) work.pauseNS += now - work.pauseStart work.tEnd = now + memstats.gcPauseDist.record(now - work.pauseStart) atomic.Store64(&memstats.last_gc_unix, uint64(unixNow)) // must be Unix time to make sense to user atomic.Store64(&memstats.last_gc_nanotime, uint64(now)) // monotonic time for us memstats.pause_ns[memstats.numgc%uint32(len(memstats.pause_ns))] = uint64(work.pauseNS) |