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cpu_openbsd.go
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cpu_openbsd.go
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//go:build openbsd
// +build openbsd
package cpu
import (
"context"
"fmt"
"runtime"
"unsafe"
"github.com/shirou/gopsutil/v3/internal/common"
"github.com/tklauser/go-sysconf"
"golang.org/x/sys/unix"
)
import "C"
const (
// sys/sched.h
cpUser = 0
cpNice = 1
cpSys = 2
cpSpin = 3
cpIntr = 4
cpIdle = 5
cpuStates = 6
cpuOnline = 0x0001 // CPUSTATS_ONLINE
// sys/sysctl.h
ctlKern = 1 // "high kernel": proc, limits
ctlHw = 6 // CTL_HW
smt = 24 // HW_SMT
kernCpTime = 40 // KERN_CPTIME
kernCPUStats = 85 // KERN_CPUSTATS
)
var ClocksPerSec = float64(128)
func init() {
clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
// ignore errors
if err == nil {
ClocksPerSec = float64(clkTck)
}
}
func Times(percpu bool) ([]TimesStat, error) {
return TimesWithContext(context.Background(), percpu)
}
func cpsToTS(cpuTimes []uint64, name string) TimesStat {
return TimesStat{
CPU: name,
User: float64(cpuTimes[cpUser]) / ClocksPerSec,
Nice: float64(cpuTimes[cpNice]) / ClocksPerSec,
System: float64(cpuTimes[cpSys]) / ClocksPerSec,
Idle: float64(cpuTimes[cpIdle]) / ClocksPerSec,
Irq: float64(cpuTimes[cpIntr]) / ClocksPerSec,
}
}
func TimesWithContext(ctx context.Context, percpu bool) (ret []TimesStat, err error) {
if !percpu {
mib := []int32{ctlKern, kernCpTime}
buf, _, err := common.CallSyscall(mib)
if err != nil {
return ret, err
}
var x []C.long
// could use unsafe.Slice but it's only for go1.17+
x = (*[cpuStates]C.long)(unsafe.Pointer(&buf[0]))[:]
cpuTimes := [cpuStates]uint64{}
for i := range x {
cpuTimes[i] = uint64(x[i])
}
c := cpsToTS(cpuTimes[:], "cpu-total")
return []TimesStat{c}, nil
}
ncpu, err := unix.SysctlUint32("hw.ncpu")
if err != nil {
return
}
var i uint32
for i = 0; i < ncpu; i++ {
mib := []int32{ctlKern, kernCPUStats, int32(i)}
buf, _, err := common.CallSyscall(mib)
if err != nil {
return ret, err
}
data := unsafe.Pointer(&buf[0])
fptr := unsafe.Pointer(uintptr(data) + uintptr(8*cpuStates))
flags := *(*uint64)(fptr)
if (flags & cpuOnline) == 0 {
continue
}
var x []uint64
x = (*[cpuStates]uint64)(data)[:]
c := cpsToTS(x, fmt.Sprintf("cpu%d", i))
ret = append(ret, c)
}
return ret, nil
}
// Returns only one (minimal) CPUInfoStat on OpenBSD
func Info() ([]InfoStat, error) {
return InfoWithContext(context.Background())
}
func InfoWithContext(ctx context.Context) ([]InfoStat, error) {
var ret []InfoStat
var err error
c := InfoStat{}
mhz, err := unix.SysctlUint32("hw.cpuspeed")
if err != nil {
return nil, err
}
c.Mhz = float64(mhz)
ncpu, err := unix.SysctlUint32("hw.ncpuonline")
if err != nil {
return nil, err
}
c.Cores = int32(ncpu)
if c.ModelName, err = unix.Sysctl("hw.model"); err != nil {
return nil, err
}
return append(ret, c), nil
}
func CountsWithContext(ctx context.Context, logical bool) (int, error) {
return runtime.NumCPU(), nil
}