86 lines
2.5 KiB
Go
86 lines
2.5 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 resourcemanager
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import (
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"time"
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"github.com/pingcap/log"
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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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"go.uber.org/zap"
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)
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func (r *ResourceManager) schedule() {
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r.poolMap.Iter(func(pool *util.PoolContainer) {
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if pool.Component == util.DistTask {
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return
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}
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cmd := r.schedulePool(pool)
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r.Exec(pool, cmd)
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})
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}
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func (r *ResourceManager) schedulePool(pool *util.PoolContainer) scheduler.Command {
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if pool.Pool.Running() == 0 {
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return scheduler.Hold
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}
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for _, sch := range r.scheduler {
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cmd := sch.Tune(pool.Component, pool.Pool)
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switch cmd {
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case scheduler.Hold:
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continue
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default:
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if cmd == scheduler.Downclock {
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if pool.Pool.Cap() == 1 || pool.Pool.Running() > pool.Pool.Cap() {
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continue
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}
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}
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return cmd
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}
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}
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return scheduler.Hold
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}
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// Exec is to executor the command from scheduler.
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func (*ResourceManager) Exec(pool *util.PoolContainer, cmd scheduler.Command) {
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if cmd == scheduler.Hold {
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return
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}
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if time.Since(pool.Pool.LastTunerTs()) > util.MinSchedulerInterval.Load() {
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con := pool.Pool.Cap()
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switch cmd {
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case scheduler.Downclock:
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concurrency := con - 1
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log.Debug("downclock goroutine pool", zap.String("category", "resource manager"),
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zap.Int32("origin concurrency", con),
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zap.Int32("concurrency", concurrency),
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zap.String("name", pool.Pool.Name()))
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pool.Pool.Tune(concurrency)
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case scheduler.Overclock:
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concurrency := con + 1
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// The maximum increase in concurrency compared to the original amount is limited to MaxOverclockCount.
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if concurrency > pool.Pool.GetOriginConcurrency()+util.MaxOverclockCount {
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return
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}
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log.Debug("overclock goroutine pool", zap.String("category", "resource manager"),
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zap.Int32("origin concurrency", con),
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zap.Int32("concurrency", concurrency),
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zap.String("name", pool.Pool.Name()))
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pool.Pool.Tune(concurrency)
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}
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}
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}
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