mirror of https://github.com/shirou/gopsutil
cpu: add frequency support for apple silicon m1/m2 cpus
This PR adds support for reading the frequency of Apple Silicon M1/M2 CPUs. We do so by reading the values out of the IOKit framework, as a few other projects have now demonstrated to be possible. This requires the use of CGO. The library provides a convenience IsAppleSilicon() guard to detect whether the values can be read. Currently gopsutil does not support the big.LITTLE CPU architectures (i think?) - in fact the P and E cores have different max frequencies. For now, just read the P core frequency. The E core data is readily available if we want to read it in the future. Closes #1000 Small example program ```go package main import ( "fmt" "github.com/shoenig/go-m1cpu" "github.com/shirou/gopsutil/v3/cpu" ) func main() { fmt.Println("is Apple Silicon:", m1cpu.IsAppleSilicon()) fmt.Println("model name", m1cpu.ModelName()) fmt.Println("pCore GHz", m1cpu.PCoreGHz()) fmt.Println("eCore GHz", m1cpu.ECoreGHz()) fmt.Println("pCore Hz", m1cpu.PCoreHz()) fmt.Println("eCore Hz", m1cpu.ECoreHz()) fmt.Println("----- gopsutil ----") infos, err := cpu.Info() if err != nil { panic(err) } for _, info := range infos { fmt.Println("info.Mhz", info.Mhz) } } ``` ```shell go run main.go is Apple Silicon: true model name Apple M2 Pro pCore GHz 3.504 eCore GHz 2.424 pCore Hz 3504000000 eCore Hz 2424000000 ----- gopsutil ---- info.Mhz 3.504e+09 ```pull/1436/head
Seth Hoenig
2 years ago
parent
c0365978d8
commit
8617ff654a
@ -0,0 +1,33 @@
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//go:build darwin
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// +build darwin
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package cpu
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import (
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"testing"
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"github.com/shoenig/go-m1cpu"
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)
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func Test_CpuInfo_AppleSilicon(t *testing.T) {
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if !m1cpu.IsAppleSilicon() {
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t.Skip("wrong cpu type")
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}
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v, err := Info()
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if err != nil {
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t.Errorf("cpu info should be implemented on darwin systems")
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}
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for _, vv := range v {
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if vv.ModelName == "" {
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t.Errorf("could not get CPU info: %v", vv)
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}
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if vv.Mhz <= 0 {
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t.Errorf("could not get frequency of: %s", vv.ModelName)
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}
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if vv.Mhz > 6000 {
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t.Errorf("cpu frequency is absurdly high value: %f MHz", vv.Mhz)
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}
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}
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}
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