intelcpu

该软件包允许与Intel_pstate驱动程序进行互动以驱动CPU频率和政治。

必须安装和激活intel_pstate驱动程序。通常，它已经包含在Linux内核4.13中，用于Sandy Bridge和后来的CPU。

从github获取它：

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

可以在这里找到文档

要求

• intel_pstate CPU性能缩放驱动程序

例子

更改Turboboost状态的简单示例：

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

在实际的项目中，强烈建议检查驾驶员及其状态：

    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
    }

您可以启用或禁用某些内核。当然，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 )
    	}    	
    }

您还可以更改CPU频率限制：

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

核心绩效和州长政治也可以改变：

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

简短的方式：

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

错误处理

此软件包有自己的错误类型CPUError
您可以通过函数传递软件包错误，然后通过errors.As检测到它。

    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{})作为替代方案。