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2ec35609d2
Empirical benchmark (calling to cpu.Info):
Lomanics-iMac:~ lomanic$ time ./cpu_info
info 0: {"cpu":0,"vendorId":"GenuineIntel","family":"6","model":"30","stepping":5,"physicalId":"","coreId":"","cores":2,"modelName":"Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz","mhz":2590,"cacheSize":256,"flags":["syscall","xd","em64t","lahf","lzcnt","prefetchw","rdtscp","tsci","fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clfsh","mmx","fxsr","sse","sse2","htt","sse3","ssse3","cx16","sse4.1","sse4.2","popcnt","vmm"],"microcode":""}
real 0m0.049s
user 0m0.023s
sys 0m0.041s
Lomanics-iMac:~ lomanic$ time ./cpu_info.fixed
info 0: {"cpu":0,"vendorId":"GenuineIntel","family":"6","model":"30","stepping":5,"physicalId":"","coreId":"","cores":2,"modelName":"Intel(R) Core(TM) i5-6440HQ CPU @ 2.60GHz","mhz":2590,"cacheSize":256,"flags":["fpu","vme","de","pse","tsc","msr","pae","mce","cx8","apic","sep","mtrr","pge","mca","cmov","pat","pse36","clfsh","mmx","fxsr","sse","sse2","htt","sse3","ssse3","cx16","sse4.1","sse4.2","popcnt","vmm","syscall","xd","em64t","lahf","lzcnt","prefetchw","rdtscp","tsci"],"microcode":""}
real 0m0.010s
user 0m0.004s
sys 0m0.006s
88 lines
2.1 KiB
Go
88 lines
2.1 KiB
Go
// +build darwin
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package cpu
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import (
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"context"
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"strconv"
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"strings"
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"golang.org/x/sys/unix"
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)
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// sys/resource.h
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const (
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CPUser = 0
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CPNice = 1
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CPSys = 2
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CPIntr = 3
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CPIdle = 4
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CPUStates = 5
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)
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// default value. from time.h
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var ClocksPerSec = float64(128)
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func Times(percpu bool) ([]TimesStat, error) {
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return TimesWithContext(context.Background(), percpu)
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}
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func TimesWithContext(ctx context.Context, percpu bool) ([]TimesStat, error) {
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if percpu {
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return perCPUTimes()
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}
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return allCPUTimes()
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}
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// Returns only one CPUInfoStat on FreeBSD
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func Info() ([]InfoStat, error) {
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return InfoWithContext(context.Background())
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}
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func InfoWithContext(ctx context.Context) ([]InfoStat, error) {
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var ret []InfoStat
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c := InfoStat{}
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c.ModelName, _ = unix.Sysctl("machdep.cpu.brand_string")
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family, _ := unix.SysctlUint32("machdep.cpu.family")
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c.Family = strconv.FormatUint(uint64(family), 10)
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model, _ := unix.SysctlUint32("machdep.cpu.model")
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c.Model = strconv.FormatUint(uint64(model), 10)
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stepping, _ := unix.SysctlUint32("machdep.cpu.stepping")
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c.Stepping = int32(stepping)
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features, err := unix.Sysctl("machdep.cpu.features")
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if err == nil {
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for _, v := range strings.Fields(features) {
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c.Flags = append(c.Flags, strings.ToLower(v))
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}
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}
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leaf7Features, err := unix.Sysctl("machdep.cpu.leaf7_features")
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if err == nil {
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for _, v := range strings.Fields(leaf7Features) {
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c.Flags = append(c.Flags, strings.ToLower(v))
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}
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}
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extfeatures, err := unix.Sysctl("machdep.cpu.extfeatures")
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if err == nil {
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for _, v := range strings.Fields(extfeatures) {
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c.Flags = append(c.Flags, strings.ToLower(v))
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}
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}
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cores, _ := unix.SysctlUint32("machdep.cpu.core_count")
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c.Cores = int32(cores)
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cacheSize, _ := unix.SysctlUint32("machdep.cpu.cache.size")
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c.CacheSize = int32(cacheSize)
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c.VendorID, _ = unix.Sysctl("machdep.cpu.vendor")
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// Use the rated frequency of the CPU. This is a static value and does not
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// account for low power or Turbo Boost modes.
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cpuFrequency, err := unix.SysctlUint64("hw.cpufrequency")
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if err != nil {
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return ret, err
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}
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c.Mhz = float64(cpuFrequency) / 1000000.0
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return append(ret, c), nil
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}
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