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// SPDX-License-Identifier: BSD-3-Clause
package cpu
import (
"context"
"fmt"
"reflect"
"regexp"
"runtime"
"strconv"
"strings"
"unsafe"
"github.com/tklauser/go-sysconf"
"golang.org/x/sys/unix"
"github.com/shirou/gopsutil/v4/internal/common"
)
var (
ClocksPerSec = float64(128)
cpuMatch = regexp.MustCompile(`^CPU:`)
originMatch = regexp.MustCompile(`Origin\s*=\s*"(.+)"\s+Id\s*=\s*(.+)\s+Stepping\s*=\s*(.+)`)
featuresMatch = regexp.MustCompile(`Features=.+<(.+)>`)
featuresMatch2 = regexp.MustCompile(`Features2=[a-f\dx]+<(.+)>`)
cpuEnd = regexp.MustCompile(`^Trying to mount root`)
cpuTimesSize int
emptyTimes cpuTimes
)
func init() {
clkTck, err := sysconf.Sysconf(sysconf.SC_CLK_TCK)
// ignore errors
if err == nil {
ClocksPerSec = float64(clkTck)
}
}
func timeStat(name string, t *cpuTimes) *TimesStat {
return &TimesStat{
User: float64(t.User) / ClocksPerSec,
Nice: float64(t.Nice) / ClocksPerSec,
System: float64(t.Sys) / ClocksPerSec,
Idle: float64(t.Idle) / ClocksPerSec,
Irq: float64(t.Intr) / ClocksPerSec,
CPU: name,
}
}
func Times(percpu bool) ([]TimesStat, error) {
return TimesWithContext(context.Background(), percpu)
}
func TimesWithContext(ctx context.Context, percpu bool) ([]TimesStat, error) {
if percpu {
buf, err := unix.SysctlRaw("kern.cp_times")
if err != nil {
return nil, err
}
// We can't do this in init due to the conflict with cpu.init()
if cpuTimesSize == 0 {
cpuTimesSize = int(reflect.TypeOf(cpuTimes{}).Size())
}
ncpus := len(buf) / cpuTimesSize
ret := make([]TimesStat, 0, ncpus)
for i := 0; i < ncpus; i++ {
times := (*cpuTimes)(unsafe.Pointer(&buf[i*cpuTimesSize]))
if *times == emptyTimes {
// CPU not present
continue
}
ret = append(ret, *timeStat(fmt.Sprintf("cpu%d", len(ret)), times))
}
return ret, nil
}
buf, err := unix.SysctlRaw("kern.cp_time")
if err != nil {
return nil, err
}
times := (*cpuTimes)(unsafe.Pointer(&buf[0]))
return []TimesStat{*timeStat("cpu-total", times)}, nil
}
// Returns only one InfoStat on DragonflyBSD. The information regarding core
// count, however is accurate and it is assumed that all InfoStat attributes
// are the same across CPUs.
func Info() ([]InfoStat, error) {
return InfoWithContext(context.Background())
}
func InfoWithContext(ctx context.Context) ([]InfoStat, error) {
const dmesgBoot = "/var/run/dmesg.boot"
c, err := parseDmesgBoot(dmesgBoot)
if err != nil {
return nil, err
}
var u32 uint32
if u32, err = unix.SysctlUint32("hw.clockrate"); err != nil {
return nil, err
}
c.Mhz = float64(u32)
var num int
var buf string
if buf, err = unix.Sysctl("hw.cpu_topology.tree"); err != nil {
return nil, err
}
num = strings.Count(buf, "CHIP")
c.Cores = int32(strings.Count(string(buf), "CORE") / num)
if c.ModelName, err = unix.Sysctl("hw.model"); err != nil {
return nil, err
}
ret := make([]InfoStat, num)
for i := 0; i < num; i++ {
ret[i] = c
}
return ret, nil
}
func parseDmesgBoot(fileName string) (InfoStat, error) {
c := InfoStat{}
lines, _ := common.ReadLines(fileName)
for _, line := range lines {
if matches := cpuEnd.FindStringSubmatch(line); matches != nil {
break
} else if matches := originMatch.FindStringSubmatch(line); matches != nil {
c.VendorID = matches[1]
t, err := strconv.ParseInt(matches[2], 10, 32)
if err != nil {
return c, fmt.Errorf("unable to parse DragonflyBSD CPU stepping information from %q: %w", line, err)
}
c.Stepping = int32(t)
} else if matches := featuresMatch.FindStringSubmatch(line); matches != nil {
for _, v := range strings.Split(matches[1], ",") {
c.Flags = append(c.Flags, strings.ToLower(v))
}
} else if matches := featuresMatch2.FindStringSubmatch(line); matches != nil {
for _, v := range strings.Split(matches[1], ",") {
c.Flags = append(c.Flags, strings.ToLower(v))
}
}
}
return c, nil
}
func CountsWithContext(ctx context.Context, logical bool) (int, error) {
return runtime.NumCPU(), nil
}
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