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From: Jesse Barnes <jbarnes@virtuousgeek.org>
To: Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org
Subject: Lossy interrupts on x86_64
Date: Wed, 12 Sep 2007 08:33:15 -0700	[thread overview]
Message-ID: <200709120833.15980.jbarnes@virtuousgeek.org> (raw)

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...

Thanks,
Jesse

             reply	other threads:[~2007-09-12 15:40 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-12 15:33 Jesse Barnes [this message]
2007-09-12 16:01 ` Lossy interrupts on x86_64 Randy Dunlap
2007-09-12 16:29   ` Jesse Barnes
2007-09-12 17:06     ` Thomas Gleixner
2007-09-17 19:13       ` Jesse Barnes
2007-09-17 19:18         ` Thomas Gleixner
2007-09-17 19:40           ` Jesse Barnes
2007-09-20 19:22           ` Jesse Barnes
2007-09-20 19:50             ` Thomas Gleixner
2007-09-21  0:40               ` Jesse Barnes
2007-09-14 17:35     ` Chuck Ebbert
2007-09-13 13:40 ` Chris Snook
2007-09-17 19:24   ` Jesse Barnes

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