From: Kyle McMartin <kyle@infradead.org>
To: Justin Piszcz <jpiszcz@lucidpixels.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>,
linux-kernel@vger.kernel.org, Kyle McMartin <kyle@infradead.org>
Subject: Re: 2.6.27/2.6.28: irqbalance dies shortly after starting the daemon on x86 but not x86_64, why?
Date: Fri, 2 Jan 2009 20:08:58 -0500 [thread overview]
Message-ID: <20090103010858.GD5181@bombadil.infradead.org> (raw)
In-Reply-To: <alpine.DEB.1.10.0901021931140.19502@p34.internal.lan>
On Fri, Jan 02, 2009 at 07:32:21PM -0500, Justin Piszcz wrote:
> The CPU = E6700 so yep, so if there is one physical socket with 4 cores it
> keeps? For it to keep and not oneshot you need > 2 cores?
>
It depends... if your 4-core is laid out with four cores sharing one
external cache, then it will terminate, if, say you had 4 cores with
each pair sharing a cache (so two external caches) then it would
continue as a daemon. (If you had 2 sockets with a processor in each
one, it would continue running as well no matter how many cores on
each.)
If you run irqbalance --debug, it will show you the topology it detects.
If you have multiple cache domains, and it is still exiting, then we
have a bug. :)
cheers, Kyle
next prev parent reply other threads:[~2009-01-03 1:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-12-30 12:26 Justin Piszcz
2009-01-02 22:23 ` Arjan van de Ven
2009-01-03 0:32 ` Justin Piszcz
2009-01-03 1:08 ` Kyle McMartin [this message]
2009-01-03 1:11 ` Justin Piszcz
2009-01-02 22:35 ` Kyle McMartin
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=20090103010858.GD5181@bombadil.infradead.org \
--to=kyle@infradead.org \
--cc=arjan@linux.intel.com \
--cc=jpiszcz@lucidpixels.com \
--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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®