From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Arrigo Benedetti <arrigo@bologna.vision.caltech.edu>
Cc: linuxppc-dev list <linuxppc-dev@ozlabs.org>
Subject: Re: Disabling interrupts on a SMP system
Date: Fri, 29 Oct 2004 10:51:30 +1000 [thread overview]
Message-ID: <1099011090.29689.96.camel@gaston> (raw)
In-Reply-To: <4181878C.20605@vision.caltech.edu>
On Thu, 2004-10-28 at 16:58 -0700, Arrigo Benedetti wrote:
> To achieve real-time performance in a very critical section of code.
> Even after moving all the
> interrupts to CPU0, there are still two interrupts running on CPU1 that
> are disturbing the
> execution of the time-critical code:
> 118: 15 21134 OpenPIC Level IPI0 (call function)
> 119: 888 904 OpenPIC Level IPI1 (reschedule)
Those are normal, they are cross-CPU interrupts used internally by the
kernel. There are also non-visible in that list the timer interrupts on
both CPUs. You just can't do anything against these.
Ben.
next prev parent reply other threads:[~2004-10-29 0:56 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-28 21:45 Disabling interrupts on a SMP system Arrigo Benedetti
2004-10-28 23:39 ` Benjamin Herrenschmidt
2004-10-28 23:58 ` Arrigo Benedetti
2004-10-29 0:51 ` Benjamin Herrenschmidt [this message]
2004-10-29 10:10 ` Gabriel Paubert
2004-10-29 23:00 ` Benjamin Herrenschmidt
2004-11-03 12:30 ` Gabriel Paubert
2004-11-03 22:11 ` Benjamin Herrenschmidt
2004-11-04 12:57 ` Gabriel Paubert
2004-11-15 11:55 ` Gabriel Paubert
2004-10-29 17:32 ` Arrigo Benedetti
2004-10-29 23:11 ` Benjamin Herrenschmidt
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=1099011090.29689.96.camel@gaston \
--to=benh@kernel.crashing.org \
--cc=arrigo@bologna.vision.caltech.edu \
--cc=linuxppc-dev@ozlabs.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.