mirror of
https://github.com/golang/go
synced 2024-11-22 09:04:42 -07:00
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package main
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import (
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"fmt"
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"runtime"
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"sort"
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)
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func gcstats(name string, n int, t int64) {
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st := &runtime.MemStats
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fmt.Printf("garbage.%sMem Alloc=%d/%d Heap=%d NextGC=%d Mallocs=%d\n", name, st.Alloc, st.TotalAlloc, st.Sys, st.NextGC, st.Mallocs)
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fmt.Printf("garbage.%s %d %d ns/op\n", name, n, t/int64(n))
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fmt.Printf("garbage.%sLastPause 1 %d ns/op\n", name, st.PauseNs[(st.NumGC-1)%uint32(len(st.PauseNs))])
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fmt.Printf("garbage.%sPause %d %d ns/op\n", name, st.NumGC, int64(st.PauseTotalNs)/int64(st.NumGC))
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nn := int(st.NumGC)
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if nn >= len(st.PauseNs) {
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nn = len(st.PauseNs)
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}
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t1, t2, t3, t4, t5 := tukey5(st.PauseNs[0:nn])
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fmt.Printf("garbage.%sPause5: %d %d %d %d %d\n", name, t1, t2, t3, t4, t5)
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// fmt.Printf("garbage.%sScan: %v\n", name, st.ScanDist)
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}
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type T []uint64
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func (t T) Len() int { return len(t) }
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func (t T) Swap(i, j int) { t[i], t[j] = t[j], t[i] }
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func (t T) Less(i, j int) bool { return t[i] < t[j] }
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func tukey5(raw []uint64) (lo, q1, q2, q3, hi uint64) {
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x := make(T, len(raw))
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copy(x, raw)
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sort.Sort(T(x))
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lo = x[0]
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q1 = x[len(x)/4]
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q2 = x[len(x)/2]
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q3 = x[len(x)*3/4]
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hi = x[len(x)-1]
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return
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}
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