func requireProgTimes(s *gcstats.GcStats) {
if !s.HaveProgTimes() {
fmt.Fprintln(os.Stderr,
"This analysis requires program execution times, which are missing from\n"+
"this GC trace. Please see 'go doc gcstats' for how to enable these.")
os.Exit(1)
}
}
func doSummary(s *gcstats.GcStats) {
// Pause time: Max, 99th %ile, 95th %ile, mean
// Mutator utilization
// 50ms mutator utilization: Min, 1st %ile, 5th %ile
pauseTimes := stats.Sample{Xs: []float64{}}
for _, stop := range s.Stops() {
pauseTimes.Xs = append(pauseTimes.Xs, float64(stop.Duration))
}
pauseTimes.Sort()
fmt.Print("Pause times: max=", ns(pauseTimes.Percentile(1)), " 99th %ile=", ns(pauseTimes.Percentile(.99)), " 95th %ile=", ns(pauseTimes.Percentile(.95)), " mean=", ns(pauseTimes.Mean()), "\n")
if s.HaveProgTimes() {
fmt.Print("Mutator utilization: ", pct(s.MutatorUtilization()), "\n")
fmt.Print("50ms mutator utilization: min=", pct(s.MMUs([]int{50000000})[0]), "\n")
}
}