c9e9ae555f
* Add license headers & NOTICE * generated protobuf --------- Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
101 lines
2.2 KiB
Go
101 lines
2.2 KiB
Go
// Copyright 2023 LiveKit, 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 utils
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import (
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"time"
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"github.com/frostbyte73/core"
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"go.uber.org/atomic"
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"github.com/livekit/protocol/logger"
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)
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// This object returns cgroup quota aware cpu stats. On other systems than Linux,
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// it falls back to full system stats
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type platformCPUMonitor interface {
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getCPUIdle() (float64, error)
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numCPU() float64
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}
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type CPUStats struct {
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idleCPUs atomic.Float64
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platform platformCPUMonitor
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updateCallback func(idle float64)
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warningThrottle core.Throttle
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closeChan chan struct{}
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}
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func NewCPUStats(updateCallback func(idle float64)) (*CPUStats, error) {
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p, err := newPlatformCPUMonitor()
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if err != nil {
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return nil, err
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}
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c := &CPUStats{
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platform: p,
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warningThrottle: core.NewThrottle(time.Minute),
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updateCallback: updateCallback,
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closeChan: make(chan struct{}),
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}
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go c.monitorCPULoad()
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return c, nil
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}
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func (c *CPUStats) GetCPUIdle() float64 {
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return c.idleCPUs.Load()
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}
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func (c *CPUStats) NumCPU() float64 {
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return c.platform.numCPU()
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}
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func (c *CPUStats) Stop() {
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close(c.closeChan)
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}
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func (c *CPUStats) monitorCPULoad() {
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ticker := time.NewTicker(time.Second)
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defer ticker.Stop()
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for {
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select {
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case <-c.closeChan:
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return
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case <-ticker.C:
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idle, err := c.platform.getCPUIdle()
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if err != nil {
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logger.Errorw("failed retrieving CPU idle", err)
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continue
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}
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c.idleCPUs.Store(idle)
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idleRatio := idle / c.platform.numCPU()
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if idleRatio < 0.1 {
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c.warningThrottle(func() { logger.Infow("high cpu load", "load", 1-idleRatio) })
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}
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if c.updateCallback != nil {
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c.updateCallback(idle)
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}
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}
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}
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}
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