From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758299Ab0HKBnl (ORCPT ); Tue, 10 Aug 2010 21:43:41 -0400 Received: from e3.ny.us.ibm.com ([32.97.182.143]:38126 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756918Ab0HKBnk (ORCPT ); Tue, 10 Aug 2010 21:43:40 -0400 Subject: Re: [RFC PATCH v9 00/16] Provide a zero-copy method on KVM virtio-net. From: Shirley Ma To: xiaohui.xin@intel.com Cc: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, herbert@gondor.hengli.com.au, jdike@linux.intel.com In-Reply-To: <1281489804.3391.23.camel@localhost.localdomain> References: <1281086624-5765-1-git-send-email-xiaohui.xin@intel.com> <1281489804.3391.23.camel@localhost.localdomain> Content-Type: text/plain; charset="UTF-8" Date: Tue, 10 Aug 2010 18:43:13 -0700 Message-ID: <1281490993.3391.25.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 (2.28.3-1.fc12) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2010-08-10 at 18:23 -0700, Shirley Ma wrote: > Also I found some vhost performance regression on the new > kernel with tuning. I used to get 9.4Gb/s, now I couldn't get it. I forgot to mention the kernel I used 2.6.36 one. And I found the native host BW is limited to 8.0Gb/s, so the regression might come from the device driver not vhost. Shirley From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shirley Ma Subject: Re: [RFC PATCH v9 00/16] Provide a zero-copy method on KVM virtio-net. Date: Tue, 10 Aug 2010 18:43:13 -0700 Message-ID: <1281490993.3391.25.camel@localhost.localdomain> References: <1281086624-5765-1-git-send-email-xiaohui.xin@intel.com> <1281489804.3391.23.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, mst@redhat.com, mingo@elte.hu, davem@davemloft.net, herbert@gondor.apana.org.au, jdike@linux.intel.com To: xiaohui.xin@intel.com Return-path: Received: from e3.ny.us.ibm.com ([32.97.182.143]:38126 "EHLO e3.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756918Ab0HKBnk (ORCPT ); Tue, 10 Aug 2010 21:43:40 -0400 In-Reply-To: <1281489804.3391.23.camel@localhost.localdomain> Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 2010-08-10 at 18:23 -0700, Shirley Ma wrote: > Also I found some vhost performance regression on the new > kernel with tuning. I used to get 9.4Gb/s, now I couldn't get it. I forgot to mention the kernel I used 2.6.36 one. And I found the native host BW is limited to 8.0Gb/s, so the regression might come from the device driver not vhost. Shirley