linux-kernel - [Dumb question] 100k RTC interrupts/sec on SMP system: why?

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Message-ID: <20061109100953.GE2226@stingr.net>
Date:	Thu, 9 Nov 2006 13:09:53 +0300
From:	Paul P Komkoff Jr <i@...ngr.net>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [Dumb question] 100k RTC interrupts/sec on SMP system: why?

Hi.

I have a couple of old SMP systems (Dual P3 on Intel STL2 boards), on
which I experience the following:
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------
 0  0      0 800752  45376 143064    0    0     0     8 96607   65  0 0 100  0  0
 0  0      0 800752  45376 143064    0    0     0     0 96439   57  0 0 100  0  0

It's a completely idle system. Interrupts are coming from rtc.
This is a stock fedora SMP kernel.

IIRC, some time ago (years) I've read that rtc can be used somehow in
SMP but I don't remember the specifics. So, maybe you are familiar
with this and can give out a quick answer - what this 100K
interrupts/sec are about, and how to get rid of them (if possible).

Thanks!

-- 
Paul P 'Stingray' Komkoff Jr // http://stingr.net/key <- my pgp key
 This message represents the official view of the voices in my head
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