linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Bert dd <bert.ddecker@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: Is there a way to change irq numbers of pcie cards ?
Date: Wed, 2 Jun 2010 12:08:33 +0000	[thread overview]
Message-ID: <AANLkTinfWMJ94pPxjRAx-vgvcqSwE9Hw3kHqEDLazhZ2@mail.gmail.com> (raw)

Hi,
Is there a way to change irq numbers of pcie cards ?

I have a supermicro machine with 2 raid cards (lsi 9260-8i and lsi 9260-8e) and
one nvidia GTX480 graphics card.
The problem is that all these pcie cards are assigned the same irq number,
and thus all the interrupts are routed to the same cpu which can not
handle this.
If I replace the nvidia GTX480 with an older graphics card(too old for
our purposes (GTX295)), the graphics card gets a different irq number
than the raid cards, the interrups of the graphics card are handled by
a different cpu than those of the raid cards, and the read/write speed
of the raid increases.
I am reading/writing at 2.5 GB/s to the raid and I am uploading
textures at 0.5 GB/s to the graphics hardware.
Is there a way to change the irq numbers of the pcie cards ?
I am using IOAPIC for interrupt routing.
I am using ubuntu - kernel version 2.6.31-14-generic.

thanks,
  Bert De Decker
  bert.dedecker@uhasselt.be

             reply	other threads:[~2010-06-02 12:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-06-02 12:08 Bert dd [this message]
2010-06-02 19:19 ` Is there a way to change irq numbers of pcie cards ? Bjorn Helgaas
2010-06-02 23:13 ` Robert Hancock
2010-06-03  7:43   ` Clemens Ladisch

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=AANLkTinfWMJ94pPxjRAx-vgvcqSwE9Hw3kHqEDLazhZ2@mail.gmail.com \
    --to=bert.ddecker@gmail.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;
as well as URLs for NNTP newsgroup(s).