From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Michael S. Tsirkin" Subject: Re: [PATCH v3 3/6] vbus: add a "vbus-proxy" bus model for vbus_driver objects Date: Wed, 19 Aug 2009 17:33:39 +0300 Message-ID: <20090819143339.GB3862@redhat.com> References: <20090814154308.26116.46980.stgit@dev.haskins.net> <20090815103243.GA26749@elte.hu> <4A870964.9090408@codemonkey.ws> <4A8965E0.8050608@gmail.com> <4A89FF08.30509@codemonkey.ws> <4A8AA9BD.2070909@gmail.com> <4A8AB076.6080906@redhat.com> <4A8ACE1F.6020402@gmail.com> <20090818165139.GC19846@redhat.com> <4A8B8F4E.80207@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Avi Kivity , Anthony Liguori , Ingo Molnar , Gregory Haskins , kvm@vger.kernel.org, alacrityvm-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: Gregory Haskins Return-path: Received: from mx2.redhat.com ([66.187.237.31]:58887 "EHLO mx2.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751870AbZHSOfb (ORCPT ); Wed, 19 Aug 2009 10:35:31 -0400 Content-Disposition: inline In-Reply-To: <4A8B8F4E.80207@gmail.com> Sender: netdev-owner@vger.kernel.org List-ID: On Wed, Aug 19, 2009 at 01:36:14AM -0400, Gregory Haskins wrote: > Please post results when you have numbers, as I had to > give up my 10GE rig in the lab. > I suspect you will have performance > issues until you at least address GSO, but you may already be there by now. Yes, measuring streaming bandwidth probably does not make sense yet, as I do not have GSO, and I do not have VM exit mitigation. But RSN. Meanwhile udp_rr does not need any of these, so I checked that and numbers look like what you'd expect. My systems seem slower than yours, but the virtualization overhead is same: around 20us (sometimes it's a bit higher, up to 25us). host to host: [root@virtlab18 netperf-2.4.5]# ~mst/netperf-2.4.5/bin/netperf -H 20.1.50.1 -t +udp_rr UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 20.1.50.1 +(20.1.50.1) port 0 AF_INET Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 262144 262144 1 1 10.00 13890.41 124928 124928 host to guest: [root@virtlab18 linux-2.6]# ~mst/netperf-2.4.5/bin/netperf -H 20.1.50.3 -t udp_rr UDP REQUEST/RESPONSE TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 20.1.50.3 +(20.1.50.3) port 0 AF_INET Local /Remote Socket Size Request Resp. Elapsed Trans. Send Recv Size Size Time Rate bytes Bytes bytes bytes secs. per sec 262144 262144 1 1 10.00 10884.78 124928 124928 -- MST