All of lore.kernel.org
 help / color / mirror / Atom feed
From: Paul P Komkoff Jr <i@stingr.net>
To: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [Dumb question] 100k RTC interrupts/sec on SMP system: why?
Date: Thu, 9 Nov 2006 13:09:53 +0300	[thread overview]
Message-ID: <20061109100953.GE2226@stingr.net> (raw)

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

             reply	other threads:[~2006-11-09 10:10 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-11-09 10:09 Paul P Komkoff Jr [this message]
2006-11-10  4:41 ` [Dumb question] 100k RTC interrupts/sec on SMP system: why? Andrew Morton
2006-11-10 12:35   ` Paul P Komkoff Jr
2006-11-10 13:00     ` Arjan van de Ven
2006-11-10 13:15       ` Paul P Komkoff Jr
2006-11-10 13:35       ` Paul P Komkoff Jr
2006-11-10 13:43         ` Arjan van de Ven
2007-01-04 19:44           ` Len Brown

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20061109100953.GE2226@stingr.net \
    --to=i@stingr.net \
    --cc=linux-kernel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.