From: Jesse Allen <the3dfxdude@hotmail.com>
To: cheuche+lkml@free.fr
Cc: linux-kernel@vger.kernel.org
Subject: Re: NForce2 pseudoscience stability testing (2.6.0-test11) - IRQ flood related ?
Date: Thu, 4 Dec 2003 16:05:28 -0700 [thread overview]
Message-ID: <20031204230528.GA189@tesore.local> (raw)
In-Reply-To: <20031204200208.GA4167@localnet>
On Thu, Dec 04, 2003 at 09:02:08PM +0100, cheuche+lkml@free.fr wrote:
> Hello,
>
> Along with the lockups already described here, I've noticed an
> unidentified source of interrupts on IRQ7.
...
> I wonder if people experiencing lockup problems also have these
> noise interrupts,
I just took a look at this, by setting up parport_pc, and yes I get noise.
This was my first sample with a kernel with APIC:
7: 29230 IO-APIC-edge parport0
Then I took a look again about 5 seconds later:
7: 41560 IO-APIC-edge parport0
And I looked again, and it was higher. If you take a look repeatally, you see
it increases for 2-3 seconds, then stops for 2-3, then starts increasing again
and continues like this. This is pretty much an idle system other than me
cat'ing. I'm not using the parallel port at all.
Then I looked at the irq with parport_pc setup and with a kernel with APIC all
disabled:
7: 0 XT-PIC parport0
And it is the same on repeated cat's.
These kernels are exactly the same except ones compiled with UP APIC and the
other isn't. I don't know how parport works, but seeing two different events
under this condition does seem suspicious.
> and I don't know if this has something to do with the
> lockups or if it is an independant problem.
>
I have no idea, but it is suspicious, as I get lockups and this noise with the
APIC enabled kernel.
Jesse
next prev parent reply other threads:[~2003-12-04 22:57 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-04 12:17 NForce2 pseudoscience stability testing (2.6.0-test11) b
2003-12-04 15:19 ` Craig Bradney
2003-12-04 16:32 ` Josh McKinney
2003-12-04 17:08 ` Julien Oster
2003-12-04 17:55 ` Josh McKinney
2003-12-04 20:02 ` NForce2 pseudoscience stability testing (2.6.0-test11) - IRQ flood related ? cheuche+lkml
2003-12-04 20:48 ` Bob
2003-12-04 23:05 ` Jesse Allen [this message]
2003-12-04 23:14 ` Prakash K. Cheemplavam
2003-12-04 23:21 ` Craig Bradney
2003-12-04 23:36 ` Prakash K. Cheemplavam
2003-12-05 5:47 ` Bob
2003-12-05 7:01 ` Craig Bradney
2003-12-05 12:33 ` Prakash K. Cheemplavam
2003-12-05 8:16 ` cheuche+lkml
2003-12-05 13:28 ` NForce2 pseudoscience stability testing (2.6.0-test11) Pat Erley
2003-12-05 5:56 NForce2 pseudoscience stability testing (2.6.0-test11) - IRQ flood related ? b
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