* Arjan van de Ven <[EMAIL PROTECTED]> [2008-03-28 12:56:13]: > Vaidyanathan Srinivasan wrote: >> Hi Arjan, >> >> I have been using powertop to find wakeup events and try to correlate >> with total interrupts received by the idle system. I want to see the >> rate of local timer interrupts go down as we optimise the drivers and >> user-space applications to avoid polling. >> >> I observed that powertop shows very low wake-from-idle rate on SMP >> system and the wake-from-idle rate is very high when all other CPUs are >> offlined and only CPU0 is operational. I have routed all irqs to CPUs >> before the experiment. > > powertop shows wakeups *per cpu* ...
Ok, so the wakeups are averaged out? Total wake-ups divided by current number of CPUs? Another related question is how is wake *from idle* computed, how is the wakeup of non-idle CPUs and idle CPUs distinguished? --Vaidy _______________________________________________ Discuss mailing list [email protected] http://mail.lesswatts.org/mailman/listinfo/discuss
