On 07/04/10 06:05, Axel Freyn wrote: > > Hi, > > I used powertop during the last days to teach my laptop real > powersaving. At the moment, I'm around 8.5 wakeups/second when I'm not > working. However, I observe as main contribution 2.0 wakeups/second > caused by > "<kernel core> : add_timer_on (clocksource_watchdog)" > > Can somebody tell me whether those wakeups are really usefull -- or can > I somehow avoid them also ;-) ?
looks like a kernel watchdog timer. There's quite a few in the kernel and they monitor hardware periodically to do various things (unstuck bad hardware, change power modes, do wireless stuff etc.). if you have a modular kernel, you can quickly rmmod drivers and see which one adds watchdog timers. Other than that you'd have to dig in the kernel code to find the particular one. Auke _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
