From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [net-next-2.6 PATCH 2/3] ixgbe: Set MSI-X vectors to NOBALANCING and set affinity Date: Wed, 18 Nov 2009 11:50:39 -0800 (PST) Message-ID: <20091118.115039.41419484.davem@davemloft.net> References: <20091118.101030.22004862.davem@davemloft.net> <1258573570.2780.14.camel@achroite.uk.solarflarecom.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: peter.p.waskiewicz.jr@intel.com, jeffrey.t.kirsher@intel.com, gospo@redhat.com, netdev@vger.kernel.org To: bhutchings@solarflare.com Return-path: Received: from 74-93-104-97-Washington.hfc.comcastbusiness.net ([74.93.104.97]:58958 "EHLO sunset.davemloft.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758065AbZKRTuW (ORCPT ); Wed, 18 Nov 2009 14:50:22 -0500 In-Reply-To: <1258573570.2780.14.camel@achroite.uk.solarflarecom.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Ben Hutchings Date: Wed, 18 Nov 2009 19:46:10 +0000 > When forwarding between 2 ports it can be beneficial to match the > affinity of each port's TX interrupts with the other port's RX > interrupts. Obviously this is not the case when the system is > acting as an endpoint, and the situation is presumably more complex > when forwarding between >2 ports. Yes, but tricks like that won't be necessary with changes that Eric Dumazet said he'd work on soon, wherein SKB frees always get scheduled to occur on the cpu where allocation occured.