aldebaran wrote: > Hi! > I upgraded to kernel 2.6.24-rc2 and noticed these new lines in powertop: > 22.2% (143.1) <kernel IPI> : Rescheduling interrupts > 12.1% ( 78.4) <interrupt> : extra timer interrupt > > the latter is not actually new, but with kernel 2.6.23 it was always > around 5-10 wakeups if any.
the Rescheduling interrupt is an indication that something in the system is being very active..... and doing so much work the kernel feels it needs to rebalance that work 143 times per second over the cores. Does the "top" program show what is being active? > > I guess it has something to do with CPU IRQ rescheduling, but is there a > way to make it disappear again? > > I noticed also no improvements in energy consumption, despite new acpi > patches: it was ~25W it is still ~25W if not more! > > C states and P states seem good: > > Cn Avg residency P-states (frequencies) > C0 (cpu running) ( 2.7%) 2.01 Ghz 0.0% > C1 0.0ms ( 0.0%) 2.00 Ghz 0.0% > C2 0.2ms ( 0.0%) 1.60 Ghz 0.0% > C3 8.7ms (97.2%) 800 Mhz 100.0% > 8.7ms is not bad but also not super good ;-) It should be entirely possible to go to 25msec or longer once you find out what is actively using your cpu. _______________________________________________ Discuss mailing list [email protected] http://mail.lesswatts.org/mailman/listinfo/discuss
