Question

我试图获得真正的最大CPU内核速度。

此代码仅适用于我的nexus 5x的四个第一个核心，但它在最后两个核心中失败：

        for (int i = 0; i < cpuCoresNumber; i++) {
            try {
                BufferedReader freqBufferedReader = new BufferedReader(new InputStreamReader(new FileInputStream(new File("/sys/devices/system/cpu/cpu" + i + "/cpufreq/scaling_max_freq"))));
                int freq = Integer.valueOf(freqBufferedReader.readLine()).intValue() / 1000;
                freqBufferedReader.close();
                coreMaxFreqArray[i] = freq;
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

对于前4个我获得实际值，对于最后2个，首先我得到实际值，但有时我得到更低的值，例如600,300,0 ......以及那两个最后核心的实际值是1800mhz。

Answer 1

尝试其中一些，我执行命令以获得每个核心的最大频率。

    private String exCommand(String comando) throws IOException {
    try {
        Process process = Runtime.getRuntime().exec(comando);
        BufferedReader reader = new BufferedReader(new InputStreamReader(process.getInputStream()));
        int read;
        char[] buffer = new char[4096];
        StringBuilder output = new StringBuilder();
        while ((read = reader.read(buffer)) > 0) {
            output.append(buffer, 0, read);
        }
        reader.close();
        process.waitFor();
        return output.toString();
    } catch (IOException | InterruptedException e) {
        throw new RuntimeException(e);
    }
}

并在我的主要方法上编写此代码以获得每个核心速度

        for (int i = 0; i <= cores; i++) {
        speed = exCommand("cat /sys/devices/system/cpu/cpu"+i+"/cpufreq/cpuinfo_max_freq");
        vel = Double.parseDouble(speed);
        vel = vel /1000000;
        System.out.println(vel);
    }

希望有所帮助

如何获得真正的最大cpu核心速度？

1 个答案: