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* Added CPU collector for NetBSD to provide load and temperature statistics --------- Signed-off-by: Matthias Petermann <mp@petermann-it.de>pull/2663/head
Matthias Petermann
2 years ago
committed by
GitHub
4 changed files with 326 additions and 0 deletions
@ -0,0 +1,277 @@
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// Copyright 2023 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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//go:build !nocpu
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// +build !nocpu
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package collector |
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import ( |
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"errors" |
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"math" |
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"regexp" |
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"sort" |
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"strconv" |
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"strings" |
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"unsafe" |
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"github.com/go-kit/log" |
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"github.com/go-kit/log/level" |
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"github.com/prometheus/client_golang/prometheus" |
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"golang.org/x/sys/unix" |
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"howett.net/plist" |
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) |
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type clockinfo struct { |
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hz int32 // clock frequency
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tick int32 // micro-seconds per hz tick
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spare int32 |
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stathz int32 // statistics clock frequency
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profhz int32 // profiling clock frequency
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} |
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type cputime struct { |
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user float64 |
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nice float64 |
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sys float64 |
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intr float64 |
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idle float64 |
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} |
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type plistref struct { |
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pref_plist unsafe.Pointer |
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pref_len uint64 |
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} |
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type sysmonValues struct { |
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CurValue int `plist:"cur-value"` |
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Description string `plist:"description"` |
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State string `plist:"state"` |
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Type string `plist:"type"` |
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} |
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type sysmonProperty []sysmonValues |
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type sysmonProperties map[string]sysmonProperty |
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func readBytes(ptr unsafe.Pointer, length uint64) []byte { |
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buf := make([]byte, length-1) |
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var i uint64 |
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for ; i < length-1; i++ { |
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buf[i] = *(*byte)(unsafe.Pointer(uintptr(ptr) + uintptr(i))) |
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} |
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return buf |
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} |
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func ioctl(fd int, nr int64, typ byte, size uintptr, retptr unsafe.Pointer) error { |
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_, _, errno := unix.Syscall( |
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unix.SYS_IOCTL, |
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uintptr(fd), |
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// Some magicks derived from sys/ioccom.h.
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uintptr((0x40000000|0x80000000)| |
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((int64(size)&(1<<13-1))<<16)| |
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(int64(typ)<<8)| |
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nr, |
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), |
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uintptr(retptr), |
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) |
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if errno != 0 { |
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return errno |
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} |
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return nil |
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} |
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func readSysmonProperties() (sysmonProperties, error) { |
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fd, err := unix.Open(rootfsFilePath("/dev/sysmon"), unix.O_RDONLY, 0777) |
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if err != nil { |
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return nil, err |
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} |
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defer unix.Close(fd) |
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var retptr plistref |
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if err = ioctl(fd, 0, 'E', unsafe.Sizeof(retptr), unsafe.Pointer(&retptr)); err != nil { |
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return nil, err |
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} |
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bytes := readBytes(retptr.pref_plist, retptr.pref_len) |
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var props sysmonProperties |
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if _, err = plist.Unmarshal(bytes, &props); err != nil { |
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return nil, err |
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} |
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return props, nil |
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} |
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func sortFilterSysmonProperties(props sysmonProperties, prefix string) []string { |
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var keys []string |
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for key := range props { |
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if !strings.HasPrefix(key, prefix) { |
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continue |
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} |
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keys = append(keys, key) |
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} |
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sort.Strings(keys) |
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return keys |
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} |
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func convertTemperatures(prop sysmonProperty, res map[int]float64) error { |
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for _, val := range prop { |
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if val.State == "invalid" || val.State == "unknown" || val.State == "" { |
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continue |
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} |
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re := regexp.MustCompile("^cpu([0-9]+) temperature$") |
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core := re.FindStringSubmatch(val.Description)[1] |
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ncore, _ := strconv.Atoi(core) |
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temperature := ((float64(uint64(val.CurValue))) / 1000000) - 273.15 |
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res[ncore] = temperature |
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} |
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return nil |
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} |
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func getCPUTemperatures() (map[int]float64, error) { |
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res := make(map[int]float64) |
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// Read all properties
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props, err := readSysmonProperties() |
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if err != nil { |
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return res, err |
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} |
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keys := sortFilterSysmonProperties(props, "coretemp") |
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for idx, _ := range keys { |
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convertTemperatures(props[keys[idx]], res) |
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} |
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return res, nil |
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} |
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func getCPUTimes() ([]cputime, error) { |
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const states = 5 |
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clockb, err := unix.SysctlRaw("kern.clockrate") |
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if err != nil { |
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return nil, err |
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} |
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clock := *(*clockinfo)(unsafe.Pointer(&clockb[0])) |
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var cpufreq float64 |
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if clock.stathz > 0 { |
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cpufreq = float64(clock.stathz) |
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} else { |
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cpufreq = float64(clock.hz) |
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} |
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ncpusb, err := unix.SysctlRaw("hw.ncpu") |
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if err != nil { |
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return nil, err |
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} |
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ncpus := *(*int)(unsafe.Pointer(&ncpusb[0])) |
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if ncpus < 1 { |
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return nil, errors.New("Invalid cpu number") |
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} |
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var times []float64 |
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for ncpu := 0; ncpu < ncpus; ncpu++ { |
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cpb, err := unix.SysctlRaw("kern.cp_time", ncpu) |
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if err != nil { |
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return nil, err |
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} |
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for len(cpb) >= int(unsafe.Sizeof(int(0))) { |
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t := *(*int)(unsafe.Pointer(&cpb[0])) |
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times = append(times, float64(t)/cpufreq) |
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cpb = cpb[unsafe.Sizeof(int(0)):] |
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} |
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} |
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cpus := make([]cputime, len(times)/states) |
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for i := 0; i < len(times); i += states { |
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cpu := &cpus[i/states] |
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cpu.user = times[i] |
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cpu.nice = times[i+1] |
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cpu.sys = times[i+2] |
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cpu.intr = times[i+3] |
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cpu.idle = times[i+4] |
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} |
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return cpus, nil |
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} |
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type statCollector struct { |
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cpu typedDesc |
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temp typedDesc |
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logger log.Logger |
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} |
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func init() { |
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registerCollector("cpu", defaultEnabled, NewStatCollector) |
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} |
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// NewStatCollector returns a new Collector exposing CPU stats.
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func NewStatCollector(logger log.Logger) (Collector, error) { |
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return &statCollector{ |
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cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue}, |
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temp: typedDesc{prometheus.NewDesc( |
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prometheus.BuildFQName(namespace, cpuCollectorSubsystem, "temperature_celsius"), |
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"CPU temperature", |
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[]string{"cpu"}, nil, |
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), prometheus.GaugeValue}, |
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logger: logger, |
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}, nil |
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} |
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// Expose CPU stats using sysctl.
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func (c *statCollector) Update(ch chan<- prometheus.Metric) error { |
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// We want time spent per-cpu per CPUSTATE.
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// CPUSTATES (number of CPUSTATES) is defined as 5U.
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// Order: CP_USER | CP_NICE | CP_SYS | CP_IDLE | CP_INTR
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// sysctl kern.cp_time.x provides CPUSTATES long integers:
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// (space-separated list of the above variables, where
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// x stands for the number of the CPU core)
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//
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// Each value is a counter incremented at frequency
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// kern.clockrate.(stathz | hz)
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//
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// Look into sys/kern/kern_clock.c for details.
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cpuTimes, err := getCPUTimes() |
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if err != nil { |
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return err |
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} |
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cpuTemperatures, err := getCPUTemperatures() |
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if err != nil { |
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return err |
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} |
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for cpu, t := range cpuTimes { |
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lcpu := strconv.Itoa(cpu) |
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ch <- c.cpu.mustNewConstMetric(float64(t.user), lcpu, "user") |
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ch <- c.cpu.mustNewConstMetric(float64(t.nice), lcpu, "nice") |
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ch <- c.cpu.mustNewConstMetric(float64(t.sys), lcpu, "system") |
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ch <- c.cpu.mustNewConstMetric(float64(t.intr), lcpu, "interrupt") |
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ch <- c.cpu.mustNewConstMetric(float64(t.idle), lcpu, "idle") |
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if temp, ok := cpuTemperatures[cpu]; ok { |
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ch <- c.temp.mustNewConstMetric(temp, lcpu) |
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} else { |
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level.Debug(c.logger).Log("msg", "no temperature information for CPU", "cpu", cpu) |
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ch <- c.temp.mustNewConstMetric(math.NaN(), lcpu) |
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} |
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} |
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return err |
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} |
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@ -0,0 +1,44 @@
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// Copyright 2023 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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// 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
|
||||
// limitations under the License.
|
||||
|
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//go:build !nocpu
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// +build !nocpu
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package collector |
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import ( |
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"runtime" |
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"testing" |
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) |
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func TestCPUTimes(t *testing.T) { |
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times, err := getCPUTimes() |
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if err != nil { |
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t.Fatalf("getCPUTimes returned error: %v", err) |
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} |
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if len(times) == 0 { |
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t.Fatalf("no CPU times found") |
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} |
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if got, want := len(times), runtime.NumCPU(); got != want { |
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t.Fatalf("unexpected # of CPU times; got %d want %d", got, want) |
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} |
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} |
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func TestCPUTemperatures(t *testing.T) { |
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_, err := getCPUTemperatures() |
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if err != nil { |
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t.Fatalf("getCPUTemperatures returned error: %v", err) |
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} |
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} |
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