Also track the CPU Spin time for OpenBSD systems.
Use the non-cgo version for all openbsd architectures. The old code only pulled some defines from header files. Just add them as enumerations in native go. Also be careful at what the SysctlRaw returns. Implement a way that supports both recent and old pre-6.4 OpenBSD systems. With go-1.16 OpenBSD binaries will link to libc and because of this binaries built on OpenBSD 6.9-current do not run on OpenBSD 6.3. OpenBSD 6.3 is also not supported for more then 2 years. So maybe the compat code is not needed. Still validation object length before doing an unsafe pointer conversion is probably reasonable but I'm no golang expert. Signed-off-by: Claudio Jeker <claudio@openbsd.org>
This commit is contained in:
Claudio Jeker
parent
9fbb56c9c8
commit
2cf3db8859
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@ -1,4 +1,4 @@
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// Copyright 2018 The Prometheus Authors
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// Copyright 2020 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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@ -11,8 +11,8 @@
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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 openbsd && !amd64 && !nocpu
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// +build openbsd,!amd64,!nocpu
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//go:build !nocpu
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// +build !nocpu
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package collector
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@ -25,11 +25,31 @@ import (
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"golang.org/x/sys/unix"
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)
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/*
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#include <sys/param.h>
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#include <sys/sched.h>
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*/
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import "C"
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type clockinfo struct {
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hz int32
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tick int32
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tickadj int32
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stathz int32
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profhz int32
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}
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const (
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CP_USER = iota
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CP_NICE
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CP_SYS
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CP_SPIN
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CP_INTR
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CP_IDLE
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CPUSTATES
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)
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const (
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CP_USER_O63 = iota
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CP_NICE_O63
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CP_SYS_O63
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CP_INTR_O63
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CP_IDLE_O63
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CPUSTATES_O63
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)
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type cpuCollector struct {
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cpu typedDesc
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@ -52,7 +72,7 @@ func (c *cpuCollector) Update(ch chan<- prometheus.Metric) (err error) {
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if err != nil {
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return err
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}
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clock := *(*C.struct_clockinfo)(unsafe.Pointer(&clockb[0]))
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clock := *(*clockinfo)(unsafe.Pointer(&clockb[0]))
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hz := float64(clock.stathz)
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ncpus, err := unix.SysctlUint32("hw.ncpu")
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@ -60,24 +80,33 @@ func (c *cpuCollector) Update(ch chan<- prometheus.Metric) (err error) {
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return err
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}
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var cpTime [][C.CPUSTATES]C.int64_t
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var cpTime [][CPUSTATES]uint64
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for i := 0; i < int(ncpus); i++ {
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cpb, err := unix.SysctlRaw("kern.cp_time2", i)
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if err != nil && err != unix.ENODEV {
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return err
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}
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if err != unix.ENODEV {
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cpTime = append(cpTime, *(*[C.CPUSTATES]C.int64_t)(unsafe.Pointer(&cpb[0])))
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var times [CPUSTATES]uint64
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for n := 0; n < len(cpb); n += 8 {
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times[n/8] = *(*uint64)(unsafe.Pointer(&cpb[n]))
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}
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if len(cpb)/8 == CPUSTATES_O63 {
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copy(times[CP_INTR:], times[CP_INTR_O63:])
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times[CP_SPIN] = 0
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}
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cpTime = append(cpTime, times)
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}
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}
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for cpu, time := range cpTime {
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lcpu := strconv.Itoa(cpu)
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ch <- c.cpu.mustNewConstMetric(float64(time[C.CP_USER])/hz, lcpu, "user")
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ch <- c.cpu.mustNewConstMetric(float64(time[C.CP_NICE])/hz, lcpu, "nice")
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ch <- c.cpu.mustNewConstMetric(float64(time[C.CP_SYS])/hz, lcpu, "system")
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ch <- c.cpu.mustNewConstMetric(float64(time[C.CP_INTR])/hz, lcpu, "interrupt")
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ch <- c.cpu.mustNewConstMetric(float64(time[C.CP_IDLE])/hz, lcpu, "idle")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_USER])/hz, lcpu, "user")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_NICE])/hz, lcpu, "nice")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_SYS])/hz, lcpu, "system")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_SPIN])/hz, lcpu, "spin")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_INTR])/hz, lcpu, "interrupt")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_IDLE])/hz, lcpu, "idle")
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}
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return err
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}
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@ -1,96 +0,0 @@
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// Copyright 2020 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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"strconv"
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"unsafe"
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"github.com/go-kit/log"
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"github.com/prometheus/client_golang/prometheus"
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"golang.org/x/sys/unix"
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)
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type clockinfo struct {
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hz int32
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tick int32
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tickadj int32
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stathz int32
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profhz int32
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}
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const (
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CP_USER = iota
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CP_NICE
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CP_SYS
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CP_SPIN
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CP_INTR
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CP_IDLE
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CPUSTATES
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)
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type cpuCollector struct {
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cpu 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, NewCPUCollector)
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}
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func NewCPUCollector(logger log.Logger) (Collector, error) {
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return &cpuCollector{
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cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue},
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logger: logger,
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}, nil
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}
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func (c *cpuCollector) Update(ch chan<- prometheus.Metric) (err error) {
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clockb, err := unix.SysctlRaw("kern.clockrate")
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if err != nil {
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return err
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}
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clock := *(*clockinfo)(unsafe.Pointer(&clockb[0]))
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hz := float64(clock.stathz)
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ncpus, err := unix.SysctlUint32("hw.ncpu")
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if err != nil {
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return err
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}
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var cpTime [][CPUSTATES]int64
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for i := 0; i < int(ncpus); i++ {
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cpb, err := unix.SysctlRaw("kern.cp_time2", i)
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if err != nil && err != unix.ENODEV {
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return err
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}
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if err != unix.ENODEV {
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cpTime = append(cpTime, *(*[CPUSTATES]int64)(unsafe.Pointer(&cpb[0])))
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}
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}
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for cpu, time := range cpTime {
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lcpu := strconv.Itoa(cpu)
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_USER])/hz, lcpu, "user")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_NICE])/hz, lcpu, "nice")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_SYS])/hz, lcpu, "system")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_SPIN])/hz, lcpu, "spin")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_INTR])/hz, lcpu, "interrupt")
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ch <- c.cpu.mustNewConstMetric(float64(time[CP_IDLE])/hz, lcpu, "idle")
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}
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return err
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}
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