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// 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 solaris
// +build !nocpu
package collector
import (
"fmt"
"strconv"
"github.com/go-kit/kit/log"
"github.com/prometheus/client_golang/prometheus"
kstat "github.com/siebenmann/go-kstat"
)
// #include <unistd.h>
import "C"
type cpuFreqCollector struct {
cpuFreq *prometheus.Desc
cpuFreqMax *prometheus.Desc
logger log.Logger
}
func init() {
registerCollector("cpufreq", defaultEnabled, NewCpuFreqCollector)
}
func NewCpuFreqCollector(logger log.Logger) (Collector, error) {
return &cpuFreqCollector{
cpuFreq: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "frequency_hertz"),
"Current cpu thread frequency in hertz.",
[]string{"cpu"}, nil,
),
cpuFreqMax: prometheus.NewDesc(
prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "frequency_max_hertz"),
"Maximum cpu thread frequency in hertz.",
[]string{"cpu"}, nil,
),
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(
c.cpuFreq,
prometheus.GaugeValue,
float64(cpuFreqV.UintVal),
lcpu,
)
// Multiply by 1e+6 to convert MHz to Hz.
ch <- prometheus.MustNewConstMetric(
c.cpuFreqMax,
prometheus.GaugeValue,
float64(cpuFreqMaxV.IntVal)*1e+6,
lcpu,
)
}
return nil
}
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