3系龙芯从3B6600开始将会有睿频。不过现在的3系龙芯在有些系统如loongnix、deepin里是可以降频的。我的3A6000在deepin系统里运行“sudo cpupower frequency-info”命令结果为：
analyzing CPU 5:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 5
  CPUs which need to have their frequency coordinated by software: 5
  maximum transition latency: 20.00 ms
  hardware limits: 312 MHz - 2.50 GHz
  available frequency steps:  2.50 GHz, 2.19 GHz, 1.88 GHz, 1.56 GHz, 1.25 GHz, 937 MHz, 625 MHz, 312 MHz
  available cpufreq governors: performance powersave
  current policy: frequency should be within 312 MHz and 2.50 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 2.50 GHz (asserted by call to kernel)

【 在 lambdago 的大作中提到: 】
: 3系龙芯都不带睿频的，
: 中断和调度都会带来上下文切换，都没有发生。
:
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