slackware_slackware 安装_slackware 停止开发(8)

Dynamic frequency scaling means that your CPU's clock speed will be reduced during periods of relative inactivity. If you're just reading something on the screen or typing up an e-mail you don't need a lot of horsepower to complete those tasks, so the CPU's speed will be reduced. This conserves power, reduces heat and greatly extends your battery life for laptop users. Desktop users will find that it keeps their computer running cooler and quieter. When you need the speed for compiling a program, playing a game or starting a new application, the CPU's frequency will be increased to match the workload.

I learned that the proc "performance" intece has been deprecated, so you'll have to use the intece in /sys/devices/system/cpu/cpu0/cpufreq to control the frequency governor. When I checked the scaling_governor file, it's "userspace" by default, but I compiled the "conservative" governor too (which gracefully increases/decreases the cpu frequency) so to use this governor:

echoconservative>scaling_governor

Check the cpu frequency now:

cat/proc/cpuinfo

Much better, huh? Once the action increases, the cpu frequency will incrase to match. If you're in X, you can fire up your favorite CPU monitoring applet and watch the frequency rise and fall as you work.

Now, this change isn't permanent but Slackware has given us a handy boot script to add our user-defined boot time options. Open up /etc/rc.d/rc.local and add a line at the end that says:

echoconservative>/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

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