On Tue, 16 Aug 2005 23:19, Srivatsa Vaddagiri wrote: > On Tue, Aug 16, 2005 at 02:30:51AM +1000, Con Kolivas wrote: > > Time definitely was lost the longer the machine was running. > > I think I found the reason for time drift. Basically cur_timer->mark_offset > doesnt expect to be called from non-timer interrupt handler. Hence it drops > one jiffy from the lost count. I fixed this in some "crude" fashion and > time has not drifted so far or is pretty much close to what it was in > pre-smp version. Will find a neat way to fix this and post a patch soon. > > > You mean disable it at runtime or not compile it in at all? Disabling it > > at runtime caused what I described to you as PIT mode (long stalls etc). > > I think I have recreated this on a machine here. Disabling > CONFIG_DYN_TICK_APIC at compile-time didnt seem to make any difference. > Will look at this problem next.
Excellent. Mind you the APIC dyntick never really worked well on the pre-smp version on any hardware I tried it on so if you get both the APIC and PIT version working well you're doing great. Thanks! Con - 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/
