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cpu_all.go
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cpu_all.go
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// Copyright 2023 LiveKit, 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 hwstats
import (
"runtime"
"github.com/mackerelio/go-osstat/cpu"
)
type osStatCPUMonitor struct {
prev *cpu.Stats
}
func newOSStatCPUMonitor() (*osStatCPUMonitor, error) {
stats, err := cpu.Get()
if err != nil {
return nil, err
}
return &osStatCPUMonitor{
prev: stats,
}, nil
}
func (p *osStatCPUMonitor) getCPUIdle() (float64, error) {
next, err := cpu.Get()
if err != nil {
return 0, err
}
idleRatio := float64(next.Idle-p.prev.Idle) / float64(next.Total-p.prev.Total)
p.prev = next
return p.numCPU() * idleRatio, nil
}
func (p *osStatCPUMonitor) numCPU() float64 {
return float64(runtime.NumCPU())
}