From mboxrd@z Thu Jan 1 00:00:00 1970 From: Krishna Kumar2 Subject: Re: [PATCH 00/18] virtio and vhost-net performance enhancements Date: Wed, 11 May 2011 22:40:42 +0530 Message-ID: References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: "Michael S. Tsirkin" Cc: habanero@linux.vnet.ibm.com, lguest@lists.ozlabs.org, Shirley Ma , kvm@vger.kernel.org, Carsten Otte , linux-s390@vger.kernel.org, Heiko Carstens , linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, steved@us.ibm.com, Christian Borntraeger , Tom Lendacky , netdev@vger.kernel.org, Martin Schwidefsky , linux390@de.ibm.com List-Id: virtualization@lists.linuxfoundation.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