On 15/03/2008, Mike Cronenworth <mike@xxxxxxxxxx> wrote: > What's the deal? The tickless kernel shouldn't be causing wakeups at > idle, correct? > > On a Pentium 4 3ghz HT machine, 2.6.24 shows very little wakeups > occuring, but on my Core 2 Duo 2.1ghz machine I'm getting over 1000 > wakeups and it's keeping one core fully awake. > > powertop output: > Top causes for wakeups: > 88.4% (1000.0) events/0 : run_workqueue (ir_timer) > 5.5% ( 62.0) <interrupt> : uhci_hcd:usb3, ahci, nvidia > 1.2% ( 13.2) <interrupt> : uhci_hcd:usb4, libata > 1.1% ( 12.0) <kernel module> : usb_hcd_poll_rh_status (rh_timer_func) > 0.9% ( 10.0) <kernel core> : ehci_irq (ehci_watchdog) > 0.5% ( 5.2) thunderbird-bin : futex_wait (hrtimer_wakeup) > > On my P4 machine, "events/0 : run_workqueue" is further down on the list > and isn't causing major wakeups. > > Both test machines are using Fedora 8. Latest updates. XFCE desktop. No > process or applications are running (besides Thunderbird, obviously). > Google searching resulted in nothing positive. Am I the only one? > On my intel core 2 duo laptop, I don't see the problem you report: Wakeups-from-idle per second : 177.2 interval: 10.0s no ACPI power usage estimate available Top causes for wakeups: 35.2% ( 58.5) npviewer.bin : schedule_timeout (process_timeout) 26.9% ( 44.6) <kernel IPI> : Rescheduling interrupts 7.8% ( 13.0) <interrupt> : iwl3945 5.2% ( 8.6) <interrupt> : libata 3.8% ( 6.3) file-roller : schedule_timeout (process_timeout) 2.8% ( 4.7) X : do_setitimer (it_real_fn) But you're probably seeing a legitimate bug (perhaps incorrect boot time selection of clock source or something). It's probably worth reporting this as a bug with as much detail about your hardware as you can (lspci -vv etc). Jonathan. > Regards, > Michael > > > -- > fedora-list mailing list > fedora-list@xxxxxxxxxx > To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list >
