66 lines
1.8 KiB
Go
66 lines
1.8 KiB
Go
// Copyright 2021 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 testutil
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import (
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"context"
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"encoding/hex"
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"runtime/pprof"
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)
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// MockCPULoad exports for testing
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func MockCPULoad(ctx context.Context, labels ...string) {
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lvs := []string{}
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for _, label := range labels {
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lvs = append(lvs, label)
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val := hex.EncodeToString([]byte(label + " value"))
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lvs = append(lvs, val)
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// start goroutine with only 1 label.
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go mockCPULoadByGoroutineWithLabel(ctx, label, label+" value")
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}
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// start goroutine with all labels.
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go mockCPULoadByGoroutineWithLabel(ctx, lvs...)
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}
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// MockCPULoadV2 exports for testing of label "sql_global_uid"
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func MockCPULoadV2(ctx context.Context, labelValues ...string) {
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lvs := []string{}
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label := "sql_global_uid"
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for _, labelValue := range labelValues {
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lvs = append(lvs, label)
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lvs = append(lvs, labelValue)
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// start goroutine with only 1 label.
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go mockCPULoadByGoroutineWithLabel(ctx, label, labelValue)
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}
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// start goroutine with all labels.
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go mockCPULoadByGoroutineWithLabel(ctx, lvs...)
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}
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func mockCPULoadByGoroutineWithLabel(ctx context.Context, labels ...string) {
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ctx = pprof.WithLabels(ctx, pprof.Labels(labels...))
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pprof.SetGoroutineLabels(ctx)
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for {
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select {
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case <-ctx.Done():
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return
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default:
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}
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sum := 0
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for i := range 1000000 {
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sum = sum + i*2
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}
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}
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}
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