C++ (Cpp) get_sys_cpu_freq_info示例

示例#1

文件： mtk_thermal_platform.c 项目： SteveHuang27/android_kernel_allview_p5_quad

static int get_sys_all_cpu_freq_info(void)
{
    int nCPU_freq_temp, i;
    char szTempBuf[512];

    for(i=0 ; i<NUMBER_OF_CORE ; i++)
    {
        sprintf(szTempBuf, "/sys/devices/system/cpu/cpu%01d/cpufreq/cpuinfo_cur_freq", i);
        nCPU_freq_temp = get_sys_cpu_freq_info(szTempBuf, 3);
        if(nCPU_freq_temp > 0)
        {
            cpufreqs[i] = nCPU_freq_temp/1000;
        }else
        {
            /* CPU is unplug now */
            cpufreqs[i] = nCPU_freq_temp*10;
        }
    }      

    return 0;
}

示例#2

static int get_sys_all_cpu_freq_info(void)
{
    int nCPU_freq_temp, i;
    char szTempBuf[512];
    int cpu_total_dmips = 0;

    for(i=0 ; i<NUMBER_OF_CORE ; i++)
    {
        sprintf(szTempBuf, "/sys/devices/system/cpu/cpu%01d/cpufreq/cpuinfo_cur_freq", i);
        nCPU_freq_temp = get_sys_cpu_freq_info(szTempBuf, 3);
        if(nCPU_freq_temp > 0)
        {
            cpufreqs[i] = nCPU_freq_temp/1000;
            cpu_total_dmips += nCPU_freq_temp;
        }
        else
        {
            /* CPU is unplug now */
            cpufreqs[i] = nCPU_freq_temp*10;
        }
    }      

    cpu_total_dmips /= 1000;
    // TODO: think a way to easy start and stop, and start for only once
    if (1 == check_dmips_limit)
    {
        if (cpu_total_dmips > mtktscpu_limited_dmips) 
        {
            THRML_ERROR_LOG("cpu %d over limit %d\n", cpu_total_dmips, mtktscpu_limited_dmips);
            if (dmips_limit_warned == false)
            {
                aee_kernel_warning("thermal", "cpu %d over limit %d\n", cpu_total_dmips, mtktscpu_limited_dmips);
                dmips_limit_warned = true;
            }
        }
    }

    return 0;
}