On Tue, Apr 13, 2010 at 7:51 PM, Peter A <loony@xxxxxxxxxxxx> wrote: > Am I doing something wrong? My view is pretty simple but the few tests I did > seemed to all indicate the same thing... > > How valuable is reporting the CPU usage if its not really shows how much of > maximum CPU power is used? > Wouldn't it make more sense to show CPU usage normalized to the maximum > frequency rather than the current frequency? > > Does the load as display with uptime compensate for power management? I went > through some of the kernel code the scheduler and the cpufreq kernel modules > but didn't see anything. I don't think so. From my understanding, the load is computed by sampling at a given interval. The per process load is a function of how often a particular PID shows up in the sample. http://www.teamquest.com/resources/gunther/display/5/index.htm I believe this method is used because of limits in a processor knowing its "speed". I.e., every processor has different metrics, identity strings, etc.. We can calculate synthetic numbers like bogomips, but this won't be valid throughout the run of the system (system is not necessarily at full power during boot or vice versa). To add to this, the metrics are computed in the kernel so there are performance and possibly other technical reasons that calculating those numbers can't be done. -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
