On Wed, 12 Sep 2007 08:33:15 -0700 Jesse Barnes wrote:
> I just narrowed down a weird problem where I was losing more than 50% of
> my vblank interrupts to what seems to be the hires timers patch. Stock
> 2.6.23-rc5 works fine, but the latest (171) kernel from rawhide drops
> most of my interrupts unless I also have another interrupt source
> running (e.g. if I hold down a key or move the mouse I get the expected
> number of vblank interrupts, otherwise I get between 3 and 30 instead
> of the expected 60 per second).
>
> Any ideas? It seems like it might be bad APIC programming, but I
> haven't gone through those mods to look for suspects...
Also tickless? (NO_HZ ?)
I think I've seen some emails about tickless and keystrokes being
needed to cause interrupts... but I'm not postive about it.
but you said "any ideas"
---
~Randy
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