From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: Network card IRQ balancing with Intel 5000 series chipsets Date: Tue, 02 Jan 2007 09:57:56 -0800 Message-ID: <459A9D24.8000807@hp.com> References: <7e63f56c0612240134s452f6510h8483fb31e5efe799@mail.gmail.com> <1167039303.3281.1574.camel@laptopd505.fenrus.org> <7e63f56c0612250326td172f28n532435b23d18b69f@mail.gmail.com> <1167046499.3281.1623.camel@laptopd505.fenrus.org> <7e63f56c0612250454g5520bd6aja0fb9ab2656ff74e@mail.gmail.com> <1167158658.3746.12.camel@localhost> <1167170793.3281.3209.camel@laptopd505.fenrus.org> <1167173199.3746.45.camel@localhost> <1167179309.3281.3342.camel@laptopd505.fenrus.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: hadi@cyberus.ca, Robert Iakobashvili , netdev@vger.kernel.org Return-path: Received: from palrel12.hp.com ([156.153.255.237]:56594 "EHLO palrel12.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932695AbXABR55 (ORCPT ); Tue, 2 Jan 2007 12:57:57 -0500 To: Arjan van de Ven In-Reply-To: <1167179309.3281.3342.camel@laptopd505.fenrus.org> Sender: netdev-owner@vger.kernel.org List-Id: netdev.vger.kernel.org >>With NAPI, if i have a few interupts it likely implies i have a huge >>network load (and therefore CPU use) and would be much more happier if >>you didnt start moving more interupt load to that already loaded CPU.... > > > current irqbalance accounts for napi by using the number of packets as > indicator for load, not the number of interrupts. (for network > interrupts obviously) And hopefully some knowledge of NUMA so it doesn't "balance" the interrupts of a NIC to some far-off (topology-wise) CPU... rick jones