intelcpu

該軟件包允許與Intel_pstate驅動程序進行互動以驅動CPU頻率和政治。

必須安裝和激活intel_pstate驅動程序。通常，它已經包含在Linux內核4.13中，用於Sandy Bridge和後來的CPU。

從github獲取它：

go get -u https://github.com/gopowersupply/intelcpu

可以在這裡找到文檔

要求

• intel_pstate CPU性能縮放驅動程序

例子

更改Turboboost狀態的簡單示例：

    cpu := intelcpu . New ()
    turbo , _ := cpu . GetTurbo ()
    if turbo {
    	cpu . SetTurbo ( false )
    } else {
    	cpu . SetTurbo ( true )
    }

在實際的項目中，強烈建議檢查駕駛員及其狀態：

    cpu := intelcpu . New ()
    
    if err := cpu . CheckDriver (); err != nil {
    	// [...] Some troubles or driver not installed
    }
    
    status , _ := cpu . GetStatus ()
    switch status {
    case intelcpu . PStateStatusActive :
    	// [...] All is ok
    case intelcpu . PStateStatusPassive :
    	// [...] Something wrong, working partially
    case intelcpu . PStateStatusOff :
    	// [...] Driver disabled, nothing to work
    }

您可以啟用或禁用某些內核。當然，除了第一：

    cpu := intelcpu . New ()
        
    cores , _ := cpu . GetCores ()
    
    for _ , core := range cores {
    	// First core will return false and its status always will be online
    	isOfflineAvailable , _ := core . IsOfflineAvailable ()
    	    	
    	isOnline , _ := core . IsOnline ()
    	fmt . Printf ( "Core %d is online: %v" , isOnline )
    	
    	// If core can be offline then do it
    	if isOfflineAvailable {
    		core . SetOnline ( false )
    	}    	
    }

您還可以更改CPU頻率限制：

    cpu := intelcpu . New ()    
    cpu . SetMaxPerf ( 0.5 ) // 50% of max

核心績效和州長政治也可以改變：

    cpu := intelcpu . New ()
    cores , _ := cpu . GetCores ()
    
    for _ , core := range cores {
    	core . SetGovernor ( intelcpu . CPUGovernorPerformance )
    	core . SetPreference ( intelcpu . CPUPreferencePerformance )
    }

簡短的方式：

    cpu := intelcpu . New ()
    cores , _ := cpu . GetCores ()
    cores . SetGovernor ( intelcpu . CPUGovernorPerformance )
    cores . SetPreference ( intelcpu . CPUPreferencePerformance )

錯誤處理

此軟件包有自己的錯誤類型CPUError
您可以通過函數傳遞軟件包錯誤，然後通過errors.As檢測到它。

    func ExecUnexpected () error {
    	// [...] Here your other returns with own errors
        cpu := intelcpu . New ()
        _ , err := cpu . GetCore ( 20000 )
        if err != nil {
        	return err
        }
        // [...] Here your other returns with own errors
    }

    func main () {
    	err := ExecUnexpected ()    	
    	if intelcpu . IsCPUError ( err ) {
    		// [...] to do anything
    	} else {
    		// [...] to do something other    		
    	}
    }

您可以使用errors.As(err, &intelcpu.CPUError{})作為替代方案。