103 lines
2.6 KiB
Go
103 lines
2.6 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package cpu_test
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import (
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/pingcap/failpoint"
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"github.com/pingcap/tidb/pkg/resourcemanager/scheduler"
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"github.com/pingcap/tidb/pkg/resourcemanager/util"
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"github.com/pingcap/tidb/pkg/util/cgroup"
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"github.com/pingcap/tidb/pkg/util/cpu"
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"github.com/stretchr/testify/require"
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)
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func TestCPUValue(t *testing.T) {
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// If it's not in the container,
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// it will have less files and the test case will fail forever.
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if !cgroup.InContainer() {
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t.Skip("Not in container, skip this test case.")
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}
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observer := cpu.NewCPUObserver()
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exit := make(chan struct{})
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-exit:
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return
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default:
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runtime.Gosched()
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}
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}
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}()
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}
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observer.Start()
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for n := 0; n < 10; n++ {
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time.Sleep(200 * time.Millisecond)
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value, unsupported := cpu.GetCPUUsage()
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require.False(t, unsupported)
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require.Greater(t, value, 0.0)
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require.Less(t, value, 1.0)
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}
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observer.Stop()
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close(exit)
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wg.Wait()
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}
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func TestFailpointCPUValue(t *testing.T) {
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failpoint.Enable("github.com/pingcap/tidb/pkg/util/cgroup/GetCgroupCPUErr", "return(true)")
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defer func() {
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failpoint.Disable("github.com/pingcap/tidb/pkg/util/cgroup/GetCgroupCPUErr")
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}()
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observer := cpu.NewCPUObserver()
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exit := make(chan struct{})
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for {
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select {
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case <-exit:
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return
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default:
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runtime.Gosched()
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}
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}
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}()
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}
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observer.Start()
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for n := 0; n < 10; n++ {
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time.Sleep(200 * time.Millisecond)
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value, unsupported := cpu.GetCPUUsage()
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require.True(t, unsupported)
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require.Equal(t, value, 0.0)
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}
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sch := scheduler.CPUScheduler{}
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require.Equal(t, scheduler.Hold, sch.Tune(util.UNKNOWN, util.NewMockGPool("test", 10)))
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// we do not stop the observer, because we inject the fail-point and the observer will not start.
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// if this test case happen goleak, it must have a bug.
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close(exit)
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wg.Wait()
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}
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