From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [PATCH] vhost: Make it more scalable by creating a vhost thread per device. Date: Thu, 08 Apr 2010 17:14:35 -0700 Message-ID: <4BBE716B.7050904@hp.com> References: <1270229480.13897.8.camel@w-sridhar.beaverton.ibm.com> <1270488911.27874.43.camel@w-sridhar.beaverton.ibm.com> <1270771542.31186.397.camel@w-sridhar.beaverton.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: "Michael S. Tsirkin" , Tom Lendacky , netdev , "kvm@vger.kernel.org" To: Sridhar Samudrala Return-path: In-Reply-To: <1270771542.31186.397.camel@w-sridhar.beaverton.ibm.com> Sender: netdev-owner@vger.kernel.org List-Id: kvm.vger.kernel.org > Here are the results with netperf TCP_STREAM 64K guest to host on a > 8-cpu Nehalem system. I presume you mean 8 core Nehalem-EP, or did you mean 8 processor Nehalem-EX? Don't get me wrong, I *like* the netperf 64K TCP_STREAM test, I lik it a lot!-) but I find it incomplete and also like to run things like single-instance TCP_RR and multiple-instance, multiple "transaction" (./configure --enable-burst) TCP_RR tests, particularly when concerned with "scaling" issues. happy benchmarking, rick jones > It shows cumulative bandwidth in Mbps and host > CPU utilization. > > Current default single vhost thread > ----------------------------------- > 1 guest: 12500 37% > 2 guests: 12800 46% > 3 guests: 12600 47% > 4 guests: 12200 47% > 5 guests: 12000 47% > 6 guests: 11700 47% > 7 guests: 11340 47% > 8 guests: 11200 48% > > vhost thread per cpu > -------------------- > 1 guest: 4900 25% > 2 guests: 10800 49% > 3 guests: 17100 67% > 4 guests: 20400 84% > 5 guests: 21000 90% > 6 guests: 22500 92% > 7 guests: 23500 96% > 8 guests: 24500 99% > > vhost thread per guest interface > -------------------------------- > 1 guest: 12500 37% > 2 guests: 21000 72% > 3 guests: 21600 79% > 4 guests: 21600 85% > 5 guests: 22500 89% > 6 guests: 22800 94% > 7 guests: 24500 98% > 8 guests: 26400 99% > > Thanks > Sridhar > > > -- > To unsubscribe from this list: send the line "unsubscribe netdev" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html