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