On Tue, 2 Nov 2010, Auke Kok wrote: > On 11/02/10 07:40, Vitus Jensen wrote: >> >> Since some kernel versions I notice very high wakeup rates during idle ... >> while the reasons for the wakeup stay at reasonable low numbers. In the >> 'powertop -d' output below it's 27463 wakeups/sec but the highest number >> for any reason is 48. How do I find out what causes the wakeups? They >> are actually there because the machine is using ~2W more than usual. >> >> My usual kernel is 2.6.27, it's shows ~100 wakeups (X11, Wifi+powersave) >> >> On this 2.6.36 powertop most of the time reports 1.000-200.000 wakeups >> during idle. It may get to 100 (X11, Wifi) or ~50 (no X11, no Wifi), >> seldomly. > > I've seen this on specific pieces of hardware (in my case, I had a > Lenovo T43 that went apenuts anyway, and I got rid of it). > > Is this older hardware? It's not uncommon for those - but shouldn't > happen anymore on core2 level hardware and newer.
It's a Thinkpad R51e with Pentium M 1.73 (http://www.thinkwiki.org/wiki/Category:R51e). The high wakeup count doesn't happen in 2.6.27, this started later (2.6.30?). What puzzles me most is that powertop can't show which waits expire that fast. In that case I could at least try to fix it (it's gentoo, the source is compiled anyway :-D). Best regards, Vitus -- Vitus Jensen, Hannover, Germany, Earth, Universe (current) _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
