看目前cpu頻率
watch -n1 "lscpu | grep MHz | awk '{print $1}'";
目前cpu設定
shell
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
performance
$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
1600000
影響cpu頻率的 slimbook battery 設定
拔掉AC會分別是
Energy Saving: 800-900MHz, scaling_governor powersave, scaling_max_freq 1600MHz
Balanced: 800-900MHz, scaling_governor powersave, scaling_max_freq 1600MHz
Max Performance: 1600MHz, scaling_governor performance, scaling_max_freq 1600MHz
接上AC會都是
performance 1600MHz
但重接AC電源之後就用不了cpu turbo boost, scaling_max_freq會固定在1600 MHz
可強制設定
echo "3900000" | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
echo "powersave" | sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor