我试图从“ubuntu_chroot shell”内部运行并行应用程序（pbzip2、pigz），但是我没有看到它们的顺序对应程序（bzip2、gzip）有任何加速。
我尝试安装 cpufrequtils，但是在安装和使用过程中出现以下错误：
安装：
Unpacking cpufrequtils (from .../cpufrequtils_008-1_armhf.deb) ...
Processing triggers for ureadahead ...
Setting up cpufrequtils (008-1) ...
* Loading cpufreq kernel modules... [ OK ]
* CPUFreq Utilities: Setting ondemand CPUFreq governor...
* CPU0...
* CPU1...
* CPU2...
* CPU3... [fail]
运行 cpufreq-info：
phablet@localhost:~/test$ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to [email protected], please.
analyzing CPU 0:
driver: msm
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.00 ms.
hardware limits: 384 MHz - 1.51 GHz
available frequency steps: 384 MHz, 486 MHz, 594 MHz, 702 MHz, 810 MHz, 918 MHz, 1.03 GHz, 1.13 GHz, 1.24 GHz, 1.35 GHz, 1.46 GHz, 1.51 GHz
available cpufreq governors: interactive, ondemand, userspace, powersave, performance
current policy: frequency should be within 384 MHz and 1.51 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 384 MHz.
cpufreq stats: 384 MHz:89.53%, 486 MHz:0.56%, 594 MHz:0.42%, 702 MHz:0.05%, 810 MHz:0.02%, 918 MHz:0.02%, 1.03 GHz:0.02%, 1.13 GHz:0.01%, 1.24 GHz:0.01%, 1.35 GHz:0.01%, 1.46 GHz:0.01%, 1.51 GHz:9.34% (21486)
analyzing CPU 1:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 0.00 ms.
analyzing CPU 2:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 0.00 ms.
analyzing CPU 3:
no or unknown cpufreq driver is active on this CPU
maximum transition latency: 0.00 ms.