mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-11-23 20:36:21 +01:00
3fb5f70b0c
Drop redundant GOOS build tags at start of file if the constraint is already specified by the filename, e.g. foo_GOOS.go or foo_GOOS_GOARCH.go, avoiding potential confusion in future. cf. https://pkg.go.dev/cmd/go#hdr-Build_constraints Signed-off-by: Daniel Swarbrick <daniel.swarbrick@gmail.com>
87 lines
1.9 KiB
Go
87 lines
1.9 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.
|
|
|
|
//go:build !nocpu
|
|
// +build !nocpu
|
|
|
|
package collector
|
|
|
|
import (
|
|
"fmt"
|
|
"strconv"
|
|
|
|
"github.com/go-kit/log"
|
|
"github.com/illumos/go-kstat"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
// #include <unistd.h>
|
|
import "C"
|
|
|
|
type cpuFreqCollector struct {
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("cpufreq", defaultEnabled, NewCpuFreqCollector)
|
|
}
|
|
|
|
func NewCpuFreqCollector(logger log.Logger) (Collector, error) {
|
|
return &cpuFreqCollector{
|
|
logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
func (c *cpuFreqCollector) Update(ch chan<- prometheus.Metric) error {
|
|
ncpus := C.sysconf(C._SC_NPROCESSORS_ONLN)
|
|
|
|
tok, err := kstat.Open()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
defer tok.Close()
|
|
|
|
for cpu := 0; cpu < int(ncpus); cpu++ {
|
|
ksCPUInfo, err := tok.Lookup("cpu_info", cpu, fmt.Sprintf("cpu_info%d", cpu))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
cpuFreqV, err := ksCPUInfo.GetNamed("current_clock_Hz")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
cpuFreqMaxV, err := ksCPUInfo.GetNamed("clock_MHz")
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
lcpu := strconv.Itoa(cpu)
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqHertzDesc,
|
|
prometheus.GaugeValue,
|
|
float64(cpuFreqV.UintVal),
|
|
lcpu,
|
|
)
|
|
// Multiply by 1e+6 to convert MHz to Hz.
|
|
ch <- prometheus.MustNewConstMetric(
|
|
cpuFreqMaxDesc,
|
|
prometheus.GaugeValue,
|
|
float64(cpuFreqMaxV.IntVal)*1e+6,
|
|
lcpu,
|
|
)
|
|
}
|
|
return nil
|
|
}
|