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metrics: removed repetitive calculations (#16944)

This commit is contained in:
Clayton Jacobs 2018-06-11 19:45:25 +08:00 committed by Péter Szilágyi
parent 9f7592c802
commit b487bdf0ba
1 changed files with 13 additions and 10 deletions
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23
metrics/metrics.go
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@ -68,17 +68,20 @@ func CollectProcessMetrics(refresh time.Duration) {
}
// Iterate loading the different stats and updating the meters
for i := 1; ; i++ {
runtime.ReadMemStats(memstats[i%2])
memAllocs.Mark(int64(memstats[i%2].Mallocs - memstats[(i-1)%2].Mallocs))
memFrees.Mark(int64(memstats[i%2].Frees - memstats[(i-1)%2].Frees))
memInuse.Mark(int64(memstats[i%2].Alloc - memstats[(i-1)%2].Alloc))
memPauses.Mark(int64(memstats[i%2].PauseTotalNs - memstats[(i-1)%2].PauseTotalNs))
location1 := i%2
location2 := (i-1)%2
if ReadDiskStats(diskstats[i%2]) == nil {
diskReads.Mark(diskstats[i%2].ReadCount - diskstats[(i-1)%2].ReadCount)
diskReadBytes.Mark(diskstats[i%2].ReadBytes - diskstats[(i-1)%2].ReadBytes)
diskWrites.Mark(diskstats[i%2].WriteCount - diskstats[(i-1)%2].WriteCount)
diskWriteBytes.Mark(diskstats[i%2].WriteBytes - diskstats[(i-1)%2].WriteBytes)
runtime.ReadMemStats(memstats[location1])
memAllocs.Mark(int64(memstats[location1].Mallocs - memstats[location2].Mallocs))
memFrees.Mark(int64(memstats[location1].Frees - memstats[location2].Frees))
memInuse.Mark(int64(memstats[location1].Alloc - memstats[location2].Alloc))
memPauses.Mark(int64(memstats[location1].PauseTotalNs - memstats[location2].PauseTotalNs))
if ReadDiskStats(diskstats[location1]) == nil {
diskReads.Mark(diskstats[location1].ReadCount - diskstats[location2].ReadCount)
diskReadBytes.Mark(diskstats[location1].ReadBytes - diskstats[location2].ReadBytes)
diskWrites.Mark(diskstats[location1].WriteCount - diskstats[location2].WriteCount)
diskWriteBytes.Mark(diskstats[location1].WriteBytes - diskstats[location2].WriteBytes)
}
time.Sleep(refresh)
}