mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-23 22:52:18 +00:00
151 lines
2.9 KiB
Go
151 lines
2.9 KiB
Go
// Copyright 2015 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 !nointerrupts
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package collector
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import (
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"fmt"
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"strconv"
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"github.com/prometheus/client_golang/prometheus"
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)
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/*
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#include <sys/param.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include <errno.h>
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#include <stdio.h>
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struct intr
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{
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int vector;
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char device[128];
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u_int64_t count;
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};
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int sysctl_nintr(void)
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{
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int nintr, mib[4];
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size_t siz;
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mib[0] = CTL_KERN;
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mib[1] = KERN_INTRCNT;
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mib[2] = KERN_INTRCNT_NUM;
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siz = sizeof(nintr);
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if (sysctl(mib, 3, &nintr, &siz, NULL, 0) < 0) {
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return -1;
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}
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return nintr;
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}
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int
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sysctl_intr(struct intr *intr, int idx)
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{
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int mib[4];
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size_t siz;
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u_quad_t cnt;
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mib[0] = CTL_KERN;
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mib[1] = KERN_INTRCNT;
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mib[2] = KERN_INTRCNT_NAME;
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mib[3] = idx;
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siz = sizeof intr->device;
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if (sysctl(mib, 4, intr->device, &siz, NULL, 0) < 0) {
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return -1;
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}
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mib[0] = CTL_KERN;
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mib[1] = KERN_INTRCNT;
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mib[2] = KERN_INTRCNT_VECTOR;
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mib[3] = idx;
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siz = sizeof intr->vector;
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if (sysctl(mib, 4, &intr->vector, &siz, NULL, 0) < 0) {
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return -1;
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}
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mib[0] = CTL_KERN;
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mib[1] = KERN_INTRCNT;
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mib[2] = KERN_INTRCNT_CNT;
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mib[3] = idx;
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siz = sizeof(cnt);
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if (sysctl(mib, 4, &cnt, &siz, NULL, 0) < 0) {
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return -1;
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}
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intr->count = cnt;
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return 1;
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}
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*/
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import "C"
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var (
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interruptLabelNames = []string{"cpu", "type", "devices"}
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)
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func (c *interruptsCollector) Update(ch chan<- prometheus.Metric) error {
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interrupts, err := getInterrupts()
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if err != nil {
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return fmt.Errorf("couldn't get interrupts: %s", err)
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}
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for dev, interrupt := range interrupts {
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for cpuNo, value := range interrupt.values {
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ch <- c.desc.mustNewConstMetric(
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value,
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strconv.Itoa(cpuNo),
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fmt.Sprintf("%d", interrupt.vector),
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dev,
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)
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}
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}
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return nil
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}
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type interrupt struct {
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vector int
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device string
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values []float64
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}
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func getInterrupts() (map[string]interrupt, error) {
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var (
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cintr C.struct_intr
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interrupts = map[string]interrupt{}
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)
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nintr := C.sysctl_nintr()
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for i := C.int(0); i < nintr; i++ {
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_, err := C.sysctl_intr(&cintr, i)
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if err != nil {
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return nil, err
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}
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dev := C.GoString(&cintr.device[0])
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interrupts[dev] = interrupt{
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vector: int(cintr.vector),
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device: dev,
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// XXX: openbsd appears to only handle interrupts on cpu 0.
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values: []float64{float64(cintr.count)},
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}
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}
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return interrupts, nil
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}
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