From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750974Ab1EKRIN (ORCPT ); Wed, 11 May 2011 13:08:13 -0400 Received: from e28smtp01.in.ibm.com ([122.248.162.1]:41479 "EHLO e28smtp01.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750703Ab1EKRIK (ORCPT ); Wed, 11 May 2011 13:08:10 -0400 In-Reply-To: References: Subject: Re: [PATCH 00/18] virtio and vhost-net performance enhancements X-KeepSent: 2BBEE530:9F02F495-6525788D:0057AC81; type=4; name=$KeepSent To: "Michael S. Tsirkin" Cc: Christian Borntraeger , Carsten Otte , habanero@linux.vnet.ibm.com, Heiko Carstens , kvm@vger.kernel.org, lguest@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, linux390@de.ibm.com, netdev@vger.kernel.org, Rusty Russell , Martin Schwidefsky , steved@us.ibm.com, Tom Lendacky , virtualization@lists.linux-foundation.org, Shirley Ma X-Mailer: Lotus Notes Release 8.5.1 September 28, 2009 Message-ID: From: Krishna Kumar2 Date: Wed, 11 May 2011 22:40:42 +0530 X-MIMETrack: Serialize by Router on d23ml172/23/M/IBM(Release 8.5.1FP5|September 29, 2010) at 11/05/2011 22:40:51 MIME-Version: 1.0 Content-type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "Michael S. Tsirkin" wrote on 05/05/2011 02:20:18 AM: > [PATCH 00/18] virtio and vhost-net performance enhancements > > OK, here's a large patchset that implements the virtio spec update that I > sent earlier. It supercedes the PUBLISH_USED_IDX patches > I sent out earlier. > > I know it's a lot to ask but please test, and please consider for 2.6.40 :) > > I see nice performance improvements: one run showed going from 12 > to 18 Gbit/s host to guest with netperf, but I did not spend a lot > of time testing performance, so no guarantees it's not a fluke, > I hope others will try this out and report. > Pls note I will be away from keyboard for the next week. I tested with the git tree (which also contains the later additional patch), and get this error on guest: May 11 08:06:08 localhost kernel: net eth0: Unexpected TX queue failure: -28 May 11 08:06:08 localhost kernel: net eth0: Unexpected TX queue failure: -28 May 11 08:06:08 localhost kernel: net eth0: Unexpected TX queue failure: -28 May 11 08:06:08 localhost kernel: net eth0: Unexpected TX queue failure: -28 ... The network stops after that and requires a modprobe "restart" to get it working again. This is with the new qemu/vhost/virtio-net. Please let me know if I am missing something. thanks, - KK