On Thu, Sep 01, 2005 at 04:07:22PM +0300, Tony Lindgren wrote: > I tried this quickly on a loaner ThinkPad T30, and needed the following > patch to compile. The patch does work with PIT, but with lapic the > system does not wake to timer interrupts :(
Even I have found that enabling lapic breaks it on my T30! I think that is a T30 issue, as I dont see any other reason why it should not work (note that I have it tested on some other SMP P4 servers where it works well). > I also hacked together a little timer test utility that should go trough > on a completely idle system with no errors. Also posted it to: > > http://www.muru.com/linux/dyntick/tools/dyntick-test.c > > Srivatsa, could you try the dyntick-test.c on your system after booting > to init=/bin/sh to make the system as idle as possible? Thanks for this test. Will test and let you know how it goes on x86. ATM I am trying to corner the lost-tick-calculation problem with ACPI PM timer. > Unfortunately I cannot debug the APIC issue right now, but I seem to > have an issue on ARM OMAP where the timer test occasionally fails on > some longer values, for example 3 second sleep can take 4 seconds. > > I don't know yet if this is the problem George Anzinger mentioned with > next_timer_interrupt(), or if this is OMAP specific. But it only seems Will let you know if I see it on x86 too. -- Thanks and Regards, Srivatsa Vaddagiri, Linux Technology Center, IBM Software Labs, Bangalore, INDIA - 560017 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
