Messages in this thread | | | Date | Sun, 6 Feb 2005 00:00:17 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH] Dynamic tick, version 050127-1 |
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Hi!
> > > > It could also be that the reprogamming of PIT timer does not work on > > > > your machine. I chopped off the udelays there... Can you try > > > > something like this: > > > > > > I added the udelays, but behaviour did not change. > > > > Yeah, and if the first patch was working better, that means the PIT > > interrupts work. I'll do another version of the patch where PIT > > interrupts work again without local APIC needed, let's see what > > happens with that. > > I think something broke TSC timer after the first patch, but I could > not figure out yet what. So the bad combo might be local APIC + TSC. > At least I'm seeing similar problems with local APIC + TSC timer. > > Attached is a slightly improved patch, but the patch does not fix > the TSC problem. It just fixes compile without local APIC, and > booting SMP kernel on uniprocessor machine. > > Currently the suggested combo is local APIC + ACPI PM timer...
Ok, works slightly better: time no longer runs 2x too fast. When TSC is used, I get same behaviour as before ("sleepy machine"). With "notsc", machine seems to work okay, but I still get 1000 timer interrupts a second.
> And if that works, changing the I8042_POLL_PERIOD from HZ/20 in > drivers/input/serio/i8042.h to something like HZ increases the > sleep interval quite a bit. I think I had lots of polling also in > CONFIG_NETFILTER, but I haven't verified that.
Okay, I set POLL_PERIOD to 5*HZ, and disabled USB. Perhaps it will sleep better now? Pavel -- People were complaining that M$ turns users into beta-testers... ...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl! - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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