100 lines
2.3 KiB
Go
100 lines
2.3 KiB
Go
// Copyright 2023 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 poolmanager
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import (
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"time"
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)
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func (t *TaskManager) getBoostTask() (tid uint64, result *Meta) {
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// boost task
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// 1、the count of running task is less than concurrency
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// 2、less run time, more possible to boost
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return t.iter(canBoost)
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}
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func (t *TaskManager) pauseTask() {
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// pause task,
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// 1、more run time, more possible to pause
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// 2、if task have been boosted, first to pause.
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_, result := t.iter(canPause)
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if result != nil {
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if result.exitCh != nil {
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select {
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case result.exitCh <- struct{}{}:
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default:
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}
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}
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}
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}
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func (t *TaskManager) iter(fn func(m *Meta, maxv time.Time) (bool, bool)) (tid uint64, result *Meta) {
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var compareTS time.Time
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for i := range shard {
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breakFind := func(int) (breakFind bool) {
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t.task[i].rw.RLock()
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defer t.task[i].rw.RUnlock()
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for id, stats := range t.task[i].stats {
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if result == nil {
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if stats.running.Load() != 0 {
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result = stats
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}
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tid = id
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compareTS = stats.createTS
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continue
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}
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isFind, pauseFind := fn(stats, compareTS)
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if isFind {
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tid = id
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result = stats
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compareTS = stats.createTS
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}
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if pauseFind {
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return true
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}
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}
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return false
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}(shard)
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if breakFind {
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break
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}
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}
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return tid, result
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}
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func canPause(m *Meta, minv time.Time) (find bool, toBreakFind bool) {
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if m.initialConcurrency < m.running.Load() {
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if m.running.Load() != 0 {
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return true, true
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}
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}
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if m.createTS.Before(minv) {
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if m.running.Load() != 0 {
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return true, false
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}
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}
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return false, false
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}
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func canBoost(m *Meta, maxv time.Time) (find bool, toBreakFind bool) {
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if m.running.Load() < m.initialConcurrency {
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return true, true
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}
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if m.createTS.After(maxv) {
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return true, false
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}
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return false, false
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}
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