If you keep using your computer while compiling packages you will notice that your box is much less responsive as usal. Now, how do we make this work to our advantage when using Portage? In our little example the xscreensaver process has a higher nice value than X, which indicates that X has a higher priority than xscreensaver. Possible values range from -20 (very high priority), via 0 (standard priority) to 20 (very low priority). The PR column indicates the priority level of a process, the value in the NI column displays the so-called nice value of process, which allows you to adjust the priority of a running process. Processes with a high priority will run before those with a lower priority, and processes with the same priority will take turns in running, one after the other and over again.īetter have a look at it for yourself: Run top from a terminal on your host and pay special attention to the PR and NI columns: One factor influencing the scheduler's decision about which process to assign CPU time to, is the priority of a process.
Very simply put, the Linux kernel has a (process) scheduler that selects which process to run next in your system.
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