/
util.go
49 lines (45 loc) · 1.32 KB
/
util.go
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// Copyright 2021 PingCAP, Inc.
//
// 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 testutil
import (
"context"
"runtime/pprof"
)
// MockCPULoad exports for testing
func MockCPULoad(ctx context.Context, labels ...string) {
lvs := []string{}
for _, label := range labels {
lvs = append(lvs, label)
lvs = append(lvs, label+" value")
// start goroutine with only 1 label.
go mockCPULoadByGoroutineWithLabel(ctx, label, label+" value")
}
// start goroutine with all labels.
go mockCPULoadByGoroutineWithLabel(ctx, lvs...)
}
func mockCPULoadByGoroutineWithLabel(ctx context.Context, labels ...string) {
ctx = pprof.WithLabels(ctx, pprof.Labels(labels...))
pprof.SetGoroutineLabels(ctx)
for {
select {
case <-ctx.Done():
return
default:
}
sum := 0
for i := 0; i < 1000000; i++ {
sum = sum + i*2
}
}
}