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*: fix panic when to enable lite-init-stats and concurrently-init-sta…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| // Copyright 2024 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 initstats | ||
|
|
||
| import ( | ||
| "runtime" | ||
|
|
||
| "github.com/pingcap/tidb/pkg/util" | ||
| "github.com/pingcap/tidb/pkg/util/logutil" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
|
||
| // Task represents the range of the table for loading stats. | ||
| type Task struct { | ||
| StartTid int64 | ||
| EndTid int64 | ||
| } | ||
|
|
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| // RangeWorker is used to load stats concurrently by the range of table id. | ||
| type RangeWorker struct { | ||
| dealFunc func(task Task) error | ||
| taskChan chan Task | ||
|
|
||
| wg util.WaitGroupWrapper | ||
| } | ||
|
|
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| // NewRangeWorker creates a new RangeWorker. | ||
| func NewRangeWorker(dealFunc func(task Task) error) *RangeWorker { | ||
| return &RangeWorker{ | ||
| dealFunc: dealFunc, | ||
| taskChan: make(chan Task, 1), | ||
| } | ||
| } | ||
|
|
||
| // LoadStats loads stats concurrently when to init stats | ||
| func (ls *RangeWorker) LoadStats() { | ||
| concurrency := runtime.GOMAXPROCS(0) | ||
| for n := 0; n < concurrency; n++ { | ||
| ls.wg.Run(func() { | ||
| ls.loadStats() | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| func (ls *RangeWorker) loadStats() { | ||
| for task := range ls.taskChan { | ||
| if err := ls.dealFunc(task); err != nil { | ||
| logutil.BgLogger().Error("load stats failed", zap.Error(err)) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // SendTask sends a task to the load stats worker. | ||
| func (ls *RangeWorker) SendTask(task Task) { | ||
| ls.taskChan <- task | ||
| } | ||
|
|
||
| // Wait closes the load stats worker. | ||
| func (ls *RangeWorker) Wait() { | ||
| close(ls.taskChan) | ||
| ls.wg.Wait() | ||
| } |