netdev - Re: [PATCH] ehea: NAPI multi queue TX/RX path for SMP

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <1172558533.11949.38.camel@localhost.localdomain>
Date:	Tue, 27 Feb 2007 07:42:13 +0100
From:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
To:	Jan-Bernd Themann <ossthema@...ibm.com>
Cc:	netdev <netdev@...r.kernel.org>, Thomas Klein <tklein@...ibm.com>,
	Jan-Bernd Themann <themann@...ibm.com>,
	Roland Dreier <rdreier@...co.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-ppc <linuxppc-dev@...abs.org>,
	Christoph Raisch <raisch@...ibm.com>,
	Marcus Eder <meder@...ibm.com>,
	Stefan Roscher <stefan.roscher@...ibm.com>
Subject: Re: [PATCH] ehea: NAPI multi queue TX/RX path for SMP

On Mon, 2007-02-26 at 17:00 +0100, Jan-Bernd Themann wrote:
> Hi!
> 
> This patch replaces the former posted patch
> ([PATCH] ehea: Optional TX/RX path optimized for SMP) and provides
> a functionality that allows parallel RX processing on multiple RX
> queues by using dummy netdevices as proposed by Roland Dreier.
> The fairness amongst this net devices and other network devices 
> is thus better than in our first approach.
> 
> Is there a way to avoid overloading a single CPU with multiple netdev
> receive processes using NAPI? A distribution based on CPU load might
> help to improve the throughput. Pinning interrupts shows there is 
> still some room for improvements.

You may also want to look at the patches proposed by Dave Miller for
splitting NAPI from netdevice so you can actually instanciate multiple
NAPI "pollers"

Ben.


-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html