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https://github.com/prometheus/node_exporter.git
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cc847f2f44
The cpu frequency information is not always needed and/or available. This change allows the cpu frequency metrics to be enabled/disabled separately from the other cpu metrics, and also prevents a frequency metric failure (such as a parse error) from failing the main cpu collector. Fixes #1241 Signed-off-by: Paul Gier <pgier@redhat.com>
75 lines
1.7 KiB
Go
75 lines
1.7 KiB
Go
// Copyright 2018 The Prometheus Authors
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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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// +build solaris
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// +build !nocpu
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package collector
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import (
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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kstat "github.com/siebenmann/go-kstat"
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)
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// #include <unistd.h>
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import "C"
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type cpuCollector struct {
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cpu typedDesc
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}
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func init() {
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registerCollector("cpu", defaultEnabled, NewCpuCollector)
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}
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func NewCpuCollector() (Collector, error) {
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return &cpuCollector{
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cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
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}, nil
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}
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func (c *cpuCollector) Update(ch chan<- prometheus.Metric) error {
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ncpus := C.sysconf(C._SC_NPROCESSORS_ONLN)
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tok, err := kstat.Open()
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if err != nil {
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return err
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}
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defer tok.Close()
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for cpu := 0; cpu < int(ncpus); cpu++ {
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ksCPU, err := tok.Lookup("cpu", cpu, "sys")
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if err != nil {
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return err
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}
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for k, v := range map[string]string{
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"idle": "cpu_ticks_idle",
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"kernel": "cpu_ticks_kernel",
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"user": "cpu_ticks_user",
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"wait": "cpu_ticks_wait",
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} {
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kstatValue, err := ksCPU.GetNamed(v)
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if err != nil {
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return err
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}
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ch <- c.cpu.mustNewConstMetric(float64(kstatValue.UintVal), strconv.Itoa(cpu), k)
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}
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}
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return nil
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}
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