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/*
Copyright The containerd 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 cgroup2
import (
"os"
"path/filepath"
"strings"
"testing"
"github.com/containerd/cgroups/v3/cgroup2/stats"
"github.com/opencontainers/runtime-spec/specs-go"
"github.com/stretchr/testify/assert"
)
func TestParseCgroupFromReader(t *testing.T) {
cases := map[string]string{
"0::/user.slice/user-1001.slice/session-1.scope\n": "/user.slice/user-1001.slice/session-1.scope",
"2:cpuset:/foo\n1:name=systemd:/\n": "",
"2:cpuset:/foo\n1:name=systemd:/\n0::/user.slice/user-1001.slice/session-1.scope\n": "/user.slice/user-1001.slice/session-1.scope",
}
for s, expected := range cases {
g, err := parseCgroupFromReader(strings.NewReader(s))
if expected != "" {
assert.Equal(t, g, expected)
assert.NoError(t, err)
} else {
assert.Error(t, err)
}
}
}
func TestParseStatCPUPSI(t *testing.T) {
const examplePSIData = `some avg10=1.71 avg60=2.36 avg300=2.57 total=230548833
full avg10=1.00 avg60=1.01 avg300=1.00 total=157622356`
fakeCgroupDir := t.TempDir()
statPath := filepath.Join(fakeCgroupDir, "cpu.pressure")
if err := os.WriteFile(statPath, []byte(examplePSIData), 0o644); err != nil {
t.Fatal(err)
}
st := getStatPSIFromFile(filepath.Join(fakeCgroupDir, "cpu.pressure"))
expected := stats.PSIStats{
Some: &stats.PSIData{
Avg10: 1.71,
Avg60: 2.36,
Avg300: 2.57,
Total: 230548833,
},
Full: &stats.PSIData{
Avg10: 1.00,
Avg60: 1.01,
Avg300: 1.00,
Total: 157622356,
},
}
assert.Equal(t, &st.Some, &expected.Some)
assert.Equal(t, &st.Full, &expected.Full)
}
func TestToResources(t *testing.T) {
var (
quota int64 = 8000
period uint64 = 10000
shares uint64 = 5000
mem int64 = 300
swap int64 = 500
)
weight := 1 + ((shares-2)*9999)/262142
res := specs.LinuxResources{
CPU: &specs.LinuxCPU{Quota: "a, Period: &period, Shares: &shares},
Memory: &specs.LinuxMemory{Limit: &mem, Swap: &swap},
}
v2resources := ToResources(&res)
assert.Equal(t, weight, *v2resources.CPU.Weight)
assert.Equal(t, CPUMax("8000 10000"), v2resources.CPU.Max)
assert.Equal(t, swap-mem, *v2resources.Memory.Swap)
res2 := specs.LinuxResources{CPU: &specs.LinuxCPU{Period: &period}}
v2resources2 := ToResources(&res2)
assert.Equal(t, CPUMax("max 10000"), v2resources2.CPU.Max)
}
func BenchmarkGetStatFileContentUint64(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
_ = getStatFileContentUint64("/proc/self/loginuid")
}
}
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