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// 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
}
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