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Source file test/bench/garbage/stats.go

Documentation: test/bench/garbage

  // 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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