| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package main |
| |
| import ( |
| "fmt" |
| "runtime" |
| "sort" |
| "time" |
| ) |
| |
| func gcstats(name string, n int, t time.Duration) { |
| st := new(runtime.MemStats) |
| runtime.ReadMemStats(st) |
| nprocs := runtime.GOMAXPROCS(-1) |
| cpus := "" |
| if nprocs != 1 { |
| cpus = fmt.Sprintf("-%d", nprocs) |
| } |
| fmt.Printf("garbage.%sMem%s Alloc=%d/%d Heap=%d NextGC=%d Mallocs=%d\n", name, cpus, st.Alloc, st.TotalAlloc, st.Sys, st.NextGC, st.Mallocs) |
| fmt.Printf("garbage.%s%s %d %d ns/op\n", name, cpus, n, t.Nanoseconds()/int64(n)) |
| fmt.Printf("garbage.%sLastPause%s 1 %d ns/op\n", name, cpus, st.PauseNs[(st.NumGC-1)%uint32(len(st.PauseNs))]) |
| fmt.Printf("garbage.%sPause%s %d %d ns/op\n", name, cpus, st.NumGC, int64(st.PauseTotalNs)/int64(st.NumGC)) |
| nn := int(st.NumGC) |
| if nn >= len(st.PauseNs) { |
| nn = len(st.PauseNs) |
| } |
| t1, t2, t3, t4, t5 := tukey5(st.PauseNs[0:nn]) |
| fmt.Printf("garbage.%sPause5%s: %d %d %d %d %d\n", name, cpus, t1, t2, t3, t4, t5) |
| |
| // fmt.Printf("garbage.%sScan: %v\n", name, st.ScanDist) |
| } |
| |
| type T []uint64 |
| |
| func (t T) Len() int { return len(t) } |
| func (t T) Swap(i, j int) { t[i], t[j] = t[j], t[i] } |
| func (t T) Less(i, j int) bool { return t[i] < t[j] } |
| |
| func tukey5(raw []uint64) (lo, q1, q2, q3, hi uint64) { |
| x := make(T, len(raw)) |
| copy(x, raw) |
| sort.Sort(T(x)) |
| lo = x[0] |
| q1 = x[len(x)/4] |
| q2 = x[len(x)/2] |
| q3 = x[len(x)*3/4] |
| hi = x[len(x)-1] |
| return |
| } |