随笔-处理器微架构-固定CPU频率
固定cpu频率
测试环境cpu频率管理是intel_pstate:
no_turbo.sh
#!/bin/bash
echo "disable turbo"
echo 1 | sudo tee /sys/devices/system/cpu/intel_pstate/no_turbo; echo 100 | sudo tee /sys/devices/system/cpu/intel_pstate/min_perf_pct;echo 100 | sudo tee /sys/devices/system/cpu/intel_pstate/max_perf_pct
sleep 1s
sudo cpufreq-info -c 0
grep "cpu MHz" /proc/cpuinfo
sudo bash no_turbo.sh
固定cpu频率 on arm
# 查看所支持的频率
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_frequencies
# 查看当前频率
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
# 查看支持的频率工作模式
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_available_governors
# 查看当前的频率工作模式
cat /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
# 或者
sudo cpufreq-info -c 7
+++
# 设置频率工作模式(正常只要设置模式,不需要设置频率)
xcpu=cpu7; echo performance | sudo tee /sys/devices/system/cpu/$xcpu/cpufreq/scaling_governor; sleep 1; cat /sys/devices/system/cpu/$xcpu/cpufreq/scaling_cur_freq
# 恢复
xcpu=cpu7; echo ondemand | sudo tee /sys/devices/system/cpu/$xcpu/cpufreq/scaling_governor
本文来自博客园,作者:LiYanbin,转载请注明原文链接:https://www.cnblogs.com/stellar-liyanbin/p/18671941