mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 03:52:59 +00:00
103 lines
2.8 KiB
Go
103 lines
2.8 KiB
Go
// Copyright 2013 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 debug
|
|
|
|
import (
|
|
"runtime"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func TestReadGCStats(t *testing.T) {
|
|
defer SetGCPercent(SetGCPercent(-1))
|
|
|
|
var stats GCStats
|
|
var mstats runtime.MemStats
|
|
var min, max time.Duration
|
|
|
|
// First ReadGCStats will allocate, second should not,
|
|
// especially if we follow up with an explicit garbage collection.
|
|
stats.PauseQuantiles = make([]time.Duration, 10)
|
|
ReadGCStats(&stats)
|
|
runtime.GC()
|
|
|
|
// Assume these will return same data: no GC during ReadGCStats.
|
|
ReadGCStats(&stats)
|
|
runtime.ReadMemStats(&mstats)
|
|
|
|
if stats.NumGC != int64(mstats.NumGC) {
|
|
t.Errorf("stats.NumGC = %d, but mstats.NumGC = %d", stats.NumGC, mstats.NumGC)
|
|
}
|
|
if stats.PauseTotal != time.Duration(mstats.PauseTotalNs) {
|
|
t.Errorf("stats.PauseTotal = %d, but mstats.PauseTotalNs = %d", stats.PauseTotal, mstats.PauseTotalNs)
|
|
}
|
|
if stats.LastGC.UnixNano() != int64(mstats.LastGC) {
|
|
t.Errorf("stats.LastGC.UnixNano = %d, but mstats.LastGC = %d", stats.LastGC.UnixNano(), mstats.LastGC)
|
|
}
|
|
n := int(mstats.NumGC)
|
|
if n > len(mstats.PauseNs) {
|
|
n = len(mstats.PauseNs)
|
|
}
|
|
if len(stats.Pause) != n {
|
|
t.Errorf("len(stats.Pause) = %d, want %d", len(stats.Pause), n)
|
|
} else {
|
|
off := (int(mstats.NumGC) + len(mstats.PauseNs) - 1) % len(mstats.PauseNs)
|
|
for i := 0; i < n; i++ {
|
|
dt := stats.Pause[i]
|
|
if dt != time.Duration(mstats.PauseNs[off]) {
|
|
t.Errorf("stats.Pause[%d] = %d, want %d", i, dt, mstats.PauseNs[off])
|
|
}
|
|
if max < dt {
|
|
max = dt
|
|
}
|
|
if min > dt || i == 0 {
|
|
min = dt
|
|
}
|
|
off = (off + len(mstats.PauseNs) - 1) % len(mstats.PauseNs)
|
|
}
|
|
}
|
|
|
|
q := stats.PauseQuantiles
|
|
nq := len(q)
|
|
if q[0] != min || q[nq-1] != max {
|
|
t.Errorf("stats.PauseQuantiles = [%d, ..., %d], want [%d, ..., %d]", q[0], q[nq-1], min, max)
|
|
}
|
|
|
|
for i := 0; i < nq-1; i++ {
|
|
if q[i] > q[i+1] {
|
|
t.Errorf("stats.PauseQuantiles[%d]=%d > stats.PauseQuantiles[%d]=%d", i, q[i], i+1, q[i+1])
|
|
}
|
|
}
|
|
}
|
|
|
|
var big = make([]byte, 1<<20)
|
|
|
|
func TestFreeOSMemory(t *testing.T) {
|
|
var ms1, ms2 runtime.MemStats
|
|
|
|
if big == nil {
|
|
t.Skip("test is not reliable when run multiple times")
|
|
}
|
|
big = nil
|
|
runtime.GC()
|
|
runtime.ReadMemStats(&ms1)
|
|
FreeOSMemory()
|
|
runtime.ReadMemStats(&ms2)
|
|
if ms1.HeapReleased >= ms2.HeapReleased {
|
|
t.Errorf("released before=%d; released after=%d; did not go up", ms1.HeapReleased, ms2.HeapReleased)
|
|
}
|
|
}
|
|
|
|
func TestSetGCPercent(t *testing.T) {
|
|
// Test that the variable is being set and returned correctly.
|
|
// Assume the percentage itself is implemented fine during GC,
|
|
// which is harder to test.
|
|
old := SetGCPercent(123)
|
|
new := SetGCPercent(old)
|
|
if new != 123 {
|
|
t.Errorf("SetGCPercent(123); SetGCPercent(x) = %d, want 123", new)
|
|
}
|
|
}
|