From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: performance regression in virtio-net in 2.6.32-rc4 Date: Tue, 27 Oct 2009 11:41:25 +0200 Message-ID: <4AE6C045.1070800@redhat.com> References: <20091026184835.GB26473@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Rusty Russell , virtualization@lists.linux-foundation.org, kvm@vger.kernel.org, netdev@vger.kernel.org To: "Michael S. Tsirkin" Return-path: Received: from mx1.redhat.com ([209.132.183.28]:49465 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750786AbZJ0Jl2 (ORCPT ); Tue, 27 Oct 2009 05:41:28 -0400 In-Reply-To: <20091026184835.GB26473@redhat.com> Sender: netdev-owner@vger.kernel.org List-ID: On 10/26/2009 08:48 PM, Michael S. Tsirkin wrote: > Hi! > I noticed a performance regression in virtio net: going from > 2.6.31 to 2.6.32-rc4 I see this, for guest to host communication: > > Any tips on debugging this? > Lacking better advice, a bisect can help as a last resort. 'git bisect start -- drivers/net drivers/virtio' will probably find it fastest. -- error compiling committee.c: too many arguments to function