mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-26 22:19:44 -08:00
fda358a1ec
LLVM/Clang 11.0 adds a `-Wundef-prefix=TARGET_OS_` build flag which breaks this build flag. Signed-off-by: Ben Kochie <superq@gmail.com>
121 lines
3.2 KiB
Go
121 lines
3.2 KiB
Go
// Copyright 2016 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.
|
|
|
|
// Based on gopsutil/cpu/cpu_darwin_cgo.go @ ae251eb which is licensed under
|
|
// BSD. See https://github.com/shirou/gopsutil/blob/master/LICENSE for details.
|
|
|
|
//go:build !nocpu
|
|
// +build !nocpu
|
|
|
|
package collector
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"fmt"
|
|
"strconv"
|
|
"unsafe"
|
|
|
|
"github.com/go-kit/log"
|
|
"github.com/prometheus/client_golang/prometheus"
|
|
)
|
|
|
|
/*
|
|
#cgo LDFLAGS:
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/mount.h>
|
|
#include <mach/mach_init.h>
|
|
#include <mach/mach_host.h>
|
|
#include <mach/host_info.h>
|
|
#include <TargetConditionals.h>
|
|
#if TARGET_OS_MAC
|
|
#include <libproc.h>
|
|
#endif
|
|
#include <mach/processor_info.h>
|
|
#include <mach/vm_map.h>
|
|
*/
|
|
import "C"
|
|
|
|
// ClocksPerSec default value. from time.h
|
|
const ClocksPerSec = float64(C.CLK_TCK)
|
|
|
|
type statCollector struct {
|
|
cpu *prometheus.Desc
|
|
logger log.Logger
|
|
}
|
|
|
|
func init() {
|
|
registerCollector("cpu", defaultEnabled, NewCPUCollector)
|
|
}
|
|
|
|
// NewCPUCollector returns a new Collector exposing CPU stats.
|
|
func NewCPUCollector(logger log.Logger) (Collector, error) {
|
|
return &statCollector{
|
|
cpu: nodeCPUSecondsDesc,
|
|
logger: logger,
|
|
}, nil
|
|
}
|
|
|
|
func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
|
|
var (
|
|
count C.mach_msg_type_number_t
|
|
cpuload *C.processor_cpu_load_info_data_t
|
|
ncpu C.natural_t
|
|
)
|
|
|
|
status := C.host_processor_info(C.host_t(C.mach_host_self()),
|
|
C.PROCESSOR_CPU_LOAD_INFO,
|
|
&ncpu,
|
|
(*C.processor_info_array_t)(unsafe.Pointer(&cpuload)),
|
|
&count)
|
|
|
|
if status != C.KERN_SUCCESS {
|
|
return fmt.Errorf("host_processor_info error=%d", status)
|
|
}
|
|
|
|
// jump through some cgo casting hoops and ensure we properly free
|
|
// the memory that cpuload points to
|
|
target := C.vm_map_t(C.mach_task_self_)
|
|
address := C.vm_address_t(uintptr(unsafe.Pointer(cpuload)))
|
|
defer C.vm_deallocate(target, address, C.vm_size_t(ncpu))
|
|
|
|
// the body of struct processor_cpu_load_info
|
|
// aka processor_cpu_load_info_data_t
|
|
var cpuTicks [C.CPU_STATE_MAX]uint32
|
|
|
|
// copy the cpuload array to a []byte buffer
|
|
// where we can binary.Read the data
|
|
size := int(ncpu) * binary.Size(cpuTicks)
|
|
buf := (*[1 << 30]byte)(unsafe.Pointer(cpuload))[:size:size]
|
|
|
|
bbuf := bytes.NewBuffer(buf)
|
|
|
|
for i := 0; i < int(ncpu); i++ {
|
|
err := binary.Read(bbuf, binary.LittleEndian, &cpuTicks)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
for k, v := range map[string]int{
|
|
"user": C.CPU_STATE_USER,
|
|
"system": C.CPU_STATE_SYSTEM,
|
|
"nice": C.CPU_STATE_NICE,
|
|
"idle": C.CPU_STATE_IDLE,
|
|
} {
|
|
ch <- prometheus.MustNewConstMetric(c.cpu, prometheus.CounterValue, float64(cpuTicks[v])/ClocksPerSec, strconv.Itoa(i), k)
|
|
}
|
|
}
|
|
return nil
|
|
}
|