1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// Copyright 2015-2018 The NATS Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package pse
import (
"fmt"
"os"
"os/exec"
"runtime"
"testing"
)
func TestPSEmulation(t *testing.T) {
if runtime.GOOS == "windows" {
t.Skipf("Skipping this test on Windows")
}
var rss, vss, psRss, psVss int64
var pcpu, psPcpu float64
runtime.GC()
// PS version first
pidStr := fmt.Sprintf("%d", os.Getpid())
out, err := exec.Command("ps", "o", "pcpu=,rss=,vsz=", "-p", pidStr).Output()
if err != nil {
t.Fatalf("Failed to execute ps command: %v\n", err)
}
fmt.Sscanf(string(out), "%f %d %d", &psPcpu, &psRss, &psVss)
psRss *= 1024 // 1k blocks, want bytes.
psVss *= 1024 // 1k blocks, want bytes.
runtime.GC()
// Our internal version
ProcUsage(&pcpu, &rss, &vss)
if pcpu != psPcpu {
delta := int64(pcpu - psPcpu)
if delta < 0 {
delta = -delta
}
if delta > 30 { // 30%?
t.Fatalf("CPUs did not match close enough: %f vs %f", pcpu, psPcpu)
}
}
if rss != psRss {
delta := rss - psRss
if delta < 0 {
delta = -delta
}
if delta > 1024*1024 { // 1MB
t.Fatalf("RSSs did not match close enough: %d vs %d", rss, psRss)
}
}
}
|
