1 files changed, 44 insertions, 0 deletions
diff --git a/test/garbage/stats.go b/test/garbage/stats.go
new file mode 100644
index 000000000..474e6ad4a
--- /dev/null
+++ b/test/garbage/stats.go
@@ -0,0 +1,44 @@
+// 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"
+)
+
+func gcstats(name string, n int, t int64) {
+	st := &runtime.MemStats
+	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)
+	fmt.Printf("garbage.%s %d %d ns/op\n", name, n, t/int64(n))
+	fmt.Printf("garbage.%sLastPause 1 %d ns/op\n", name, st.PauseNs[(st.NumGC-1)%uint32(len(st.PauseNs))])
+	fmt.Printf("garbage.%sPause %d %d ns/op\n", name, 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: %d %d %d %d %d\n", name, 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
+}