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runtime,runtime/metrics: add metric for distribution of GC pauses

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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>
This commit is contained in:
Michael Anthony Knyszek 2020-08-06 21:59:13 +00:00 • committed by Michael Knyszek
parent 36c5edd8d9
commit d39a89fd58
6 changed files with 54 additions and 0 deletions
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9
src/runtime/metrics.go
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@ -102,6 +102,15 @@ func initMetrics() {
out.scalar = in.heapStats.numObjects
},
},
"/gc/pauses:seconds": {
compute: func(_ *statAggregate, out *metricValue) {
hist := out.float64HistOrInit(timeHistBuckets)
hist.counts[len(hist.counts)-1] = atomic.Load64(&memstats.gcPauseDist.overflow)
for i := range hist.buckets {
hist.counts[i] = atomic.Load64(&memstats.gcPauseDist.counts[i])
}
},
},
"/memory/classes/heap/free:bytes": {
deps: makeStatDepSet(heapStatsDep),
compute: func(in *statAggregate, out *metricValue) {