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// 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.
// +build windows
package pse
import (
"fmt"
"os/exec"
"runtime"
"strconv"
"strings"
"testing"
)
func checkValues(t *testing.T, pcpu, tPcpu float64, rss, tRss int64) {
if pcpu != tPcpu {
delta := int64(pcpu - tPcpu)
if delta < 0 {
delta = -delta
}
if delta > 30 { // 30%?
t.Fatalf("CPUs did not match close enough: %f vs %f", pcpu, tPcpu)
}
}
if rss != tRss {
delta := rss - tRss
if delta < 0 {
delta = -delta
}
if delta > 1024*1024 { // 1MB
t.Fatalf("RSSs did not match close enough: %d vs %d", rss, tRss)
}
}
}
func TestPSEmulationWin(t *testing.T) {
var pcpu, tPcpu float64
var rss, vss, tRss int64
runtime.GC()
if err := ProcUsage(&pcpu, &rss, &vss); err != nil {
t.Fatalf("Error: %v", err)
}
runtime.GC()
imageName := getProcessImageName()
// query the counters using typeperf
out, err := exec.Command("typeperf.exe",
fmt.Sprintf("\\Process(%s)\\%% Processor Time", imageName),
fmt.Sprintf("\\Process(%s)\\Working Set - Private", imageName),
fmt.Sprintf("\\Process(%s)\\Virtual Bytes", imageName),
"-sc", "1").Output()
if err != nil {
t.Fatal("unable to run command", err)
}
// parse out results - refer to comments in procUsage for detail
results := strings.Split(string(out), "\r\n")
values := strings.Split(results[2], ",")
// parse pcpu
tPcpu, err = strconv.ParseFloat(strings.Trim(values[1], "\""), 64)
if err != nil {
t.Fatalf("Unable to parse percent cpu: %s", values[1])
}
// parse private bytes (rss)
fval, err := strconv.ParseFloat(strings.Trim(values[2], "\""), 64)
if err != nil {
t.Fatalf("Unable to parse private bytes: %s", values[2])
}
tRss = int64(fval)
checkValues(t, pcpu, tPcpu, rss, tRss)
runtime.GC()
// Again to test caching
if err = ProcUsage(&pcpu, &rss, &vss); err != nil {
t.Fatalf("Error: %v", err)
}
checkValues(t, pcpu, tPcpu, rss, tRss)
}
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