mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-09 23:24:09 -08:00
107 lines
2.6 KiB
Go
107 lines
2.6 KiB
Go
// Copyright 2019 The Prometheus Authors
|
|
// 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.
|
|
|
|
// +build !noshedstat
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"github.com/go-kit/kit/log"
|
|
"github.com/go-kit/kit/log/level"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
"github.com/prometheus/procfs"
|
|
)
|
|
|
|
const nsPerSec = 1e9
|
|
|
|
var (
|
|
runningSecondsTotal = prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, "schedstat", "running_seconds_total"),
|
|
"Number of seconds CPU spent running a process.",
|
|
[]string{"cpu"},
|
|
nil,
|
|
)
|
|
|
|
waitingSecondsTotal = prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, "schedstat", "waiting_seconds_total"),
|
|
"Number of seconds spent by processing waiting for this CPU.",
|
|
[]string{"cpu"},
|
|
nil,
|
|
)
|
|
|
|
timeslicesTotal = prometheus.NewDesc(
|
|
prometheus.BuildFQName(namespace, "schedstat", "timeslices_total"),
|
|
"Number of timeslices executed by CPU.",
|
|
[]string{"cpu"},
|
|
nil,
|
|
)
|
|
)
|
|
|
|
// NewSchedstatCollector returns a new Collector exposing task scheduler statistics
|
|
func NewSchedstatCollector(logger log.Logger) (Collector, error) {
|
|
fs, err := procfs.NewFS(*procPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("failed to open procfs: %w", err)
|
|
}
|
|
|
|
return &schedstatCollector{fs, logger}, nil
|
|
}
|
|
|
|
type schedstatCollector struct {
|
|
fs procfs.FS
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("schedstat", defaultEnabled, NewSchedstatCollector)
|
|
}
|
|
|
|
func (c *schedstatCollector) Update(ch chan<- prometheus.Metric) error {
|
|
stats, err := c.fs.Schedstat()
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
level.Debug(c.logger).Log("msg", "schedstat file does not exist")
|
|
return ErrNoData
|
|
}
|
|
return err
|
|
}
|
|
|
|
for _, cpu := range stats.CPUs {
|
|
ch <- prometheus.MustNewConstMetric(
|
|
runningSecondsTotal,
|
|
prometheus.CounterValue,
|
|
float64(cpu.RunningNanoseconds)/nsPerSec,
|
|
cpu.CPUNum,
|
|
)
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
waitingSecondsTotal,
|
|
prometheus.CounterValue,
|
|
float64(cpu.WaitingNanoseconds)/nsPerSec,
|
|
cpu.CPUNum,
|
|
)
|
|
|
|
ch <- prometheus.MustNewConstMetric(
|
|
timeslicesTotal,
|
|
prometheus.CounterValue,
|
|
float64(cpu.RunTimeslices),
|
|
cpu.CPUNum,
|
|
)
|
|
}
|
|
|
|
return nil
|
|
}
|