Re: ERR in /proc/interrupts
From: Andreas Schwarz (usenet.2117_at_andreas-s.net)
Date: 09/30/03
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To: linux-kernel@vger.kernel.org Date: Tue, 30 Sep 2003 17:54:07 +0000 (UTC)
Andreas Schwarz wrote:
> Christian wrote:
>> Andreas Schwarz wrote:
>>> I get a very high ERR count in /proc/interrupts. If I move my USB mouse
>>> the number increases.
>>>
>>> What does ERR mean? Nothing good, I suppose?
>>>
>>
>> ../Documentation/filesystems/proc.txt says:
>>
>> ERR is incremented in the case of errors in the IO-APIC bus (the bus
>> that connects the CPUs in a SMP system. This means that an error has
>> been detected, the IO-APIC automatically retry the transmission, so it
>> should not be a big problem, but you should read the SMP-FAQ.
>
> I don't have a SMP kernel. I compiled the kernel with IO APIC support,
> but disabled it later with the noapic kernel boot option.
I recompiled the kernel with both APIC options disabled. Result: ERR is
0, and my USB mouse is no longer choppy.
APIC = evil (at least on my K7S5A Pro)!
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