From: David Miller <davem@davemloft.net>
To: ossthema@de.ibm.com
Cc: tklein@de.ibm.com, themann@de.ibm.com, stefan.roscher@de.ibm.com,
netdev@vger.kernel.org, jchapman@katalix.com, raisch@de.ibm.com,
linux-kernel@vger.kernel.org, linuxppc-dev@ozlabs.org,
akepner@sgi.com, meder@de.ibm.com,
shemminger@linux-foundation.org
Subject: Re: RFC: issues concerning the next NAPI interface
Date: Tue, 28 Aug 2007 13:27:41 -0700 (PDT) [thread overview]
Message-ID: <20070828.132741.118957759.davem@davemloft.net> (raw)
In-Reply-To: <200708281321.10679.ossthema@de.ibm.com>
From: Jan-Bernd Themann <ossthema@de.ibm.com>
Date: Tue, 28 Aug 2007 13:21:09 +0200
> So I guess one solution is to "force" an HW interrupt when two many
> RQs are processed on the same CPU (when no IRQ pinning is
> used). This is something the driver has to handle.
No, the solution is to lock the interrupts onto one specific
processor and don't move it around. That's what's causing
all of the problems.
And you can enforce this policy now in the driver even if just
for testing by calling the set_affinity() interfaces on the
interrupts your driver has.
You can even walk over the cpu_online_map and choose a load
distribution of your liking.
next prev parent reply other threads:[~2007-08-28 20:27 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-24 13:59 RFC: issues concerning the next NAPI interface Jan-Bernd Themann
2007-08-24 15:37 ` akepner
2007-08-24 15:47 ` Jan-Bernd Themann
2007-08-24 15:52 ` Stephen Hemminger
2007-08-24 16:50 ` David Stevens
2007-08-24 21:44 ` David Miller
2007-08-24 21:51 ` Linas Vepstas
2007-08-24 16:51 ` Linas Vepstas
2007-08-24 17:07 ` Rick Jones
2007-08-24 17:45 ` Shirley Ma
2007-08-24 17:16 ` James Chapman
2007-08-24 18:11 ` Jan-Bernd Themann
2007-08-24 21:47 ` David Miller
2007-08-24 22:06 ` akepner
2007-08-26 19:36 ` James Chapman
2007-08-27 1:58 ` David Miller
2007-08-27 9:47 ` Jan-Bernd Themann
2007-08-27 20:37 ` David Miller
2007-08-28 11:19 ` Jan-Bernd Themann
2007-08-28 20:21 ` David Miller
2007-08-29 7:10 ` Jan-Bernd Themann
2007-08-29 8:15 ` James Chapman
2007-08-29 8:43 ` Jan-Bernd Themann
2007-08-29 8:29 ` David Miller
2007-08-29 8:31 ` Jan-Bernd Themann
2007-08-27 15:51 ` James Chapman
2007-08-27 16:02 ` Jan-Bernd Themann
2007-08-27 17:05 ` James Chapman
2007-08-27 21:02 ` David Miller
2007-08-27 21:41 ` James Chapman
2007-08-27 21:56 ` David Miller
2007-08-28 9:22 ` James Chapman
2007-08-28 11:48 ` Jan-Bernd Themann
2007-08-28 12:16 ` Evgeniy Polyakov
2007-08-28 14:55 ` James Chapman
2007-08-28 11:21 ` Jan-Bernd Themann
2007-08-28 20:25 ` David Miller
2007-08-28 20:27 ` David Miller [this message]
2007-08-24 16:45 ` Linas Vepstas
2007-08-24 21:43 ` David Miller
2007-08-24 21:32 ` David Miller
2007-08-24 21:37 ` David Miller
[not found] <8VHRR-45R-17@gated-at.bofh.it>
[not found] ` <8VKwj-8ke-27@gated-at.bofh.it>
2007-08-24 19:04 ` Bodo Eggert
2007-08-24 20:42 ` Linas Vepstas
2007-08-24 21:11 ` Jan-Bernd Themann
2007-08-24 21:35 ` Linas Vepstas
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=20070828.132741.118957759.davem@davemloft.net \
--to=davem@davemloft.net \
--cc=akepner@sgi.com \
--cc=jchapman@katalix.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@ozlabs.org \
--cc=meder@de.ibm.com \
--cc=netdev@vger.kernel.org \
--cc=ossthema@de.ibm.com \
--cc=raisch@de.ibm.com \
--cc=shemminger@linux-foundation.org \
--cc=stefan.roscher@de.ibm.com \
--cc=themann@de.ibm.com \
--cc=tklein@de.ibm.com \
/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).