From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: care and feeding of netperf (Re: Mainline kernel OLTP performance update) Date: Mon, 26 Jan 2009 10:26:15 -0800 Message-ID: <497E0047.5080307@hp.com> References: <1232617672.14549.25.camel@penberg-laptop> <1232679773.11429.155.camel@ymzhang> <200901231933.10101.nickpiggin@yahoo.com.au> <1232701348.11429.170.camel@ymzhang> <497A0F27.3030801@hp.com> <1232766180.11429.202.camel@ymzhang> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: Nick Piggin , Pekka Enberg , Christoph Lameter , Andi Kleen , Matthew Wilcox , Andrew Morton , netdev@vger.kernel.org, sfr@canb.auug.org.au, matthew.r.wilcox@intel.com, chinang.ma@intel.com, linux-kernel@vger.kernel.org, sharad.c.tripathi@intel.com, arjan@linux.intel.com, suresh.b.siddha@intel.com, harita.chilukuri@intel.com, douglas.w.styner@intel.com, peter.xihong.wang@intel.com, hubert.nueckel@intel.com, chris.mason@oracle.com, srostedt@redhat.com, linux-scsi@vger.kernel.org, andrew.vasquez@qlogic.com, anirban.chakraborty@qlogic.com To: "Zhang, Yanmin" Return-path: In-Reply-To: <1232766180.11429.202.camel@ymzhang> Sender: linux-scsi-owner@vger.kernel.org List-Id: netdev.vger.kernel.org >>To get quick profiles, that form of aggregate netperf is OK - just the one >>iteration with background processes using a moderatly long run time. However, >>for result reporting, it is best to (ab)use the confidence intervals >>functionality to try to avoid skew errors. > > Yes. My formal testing uses -i 50. I just wanted a quick testing. If I need > finer-tuning or investigation, I would turn on more options. Netperf will silently clip that to 30 as that is all the built-in tables know. > Thanks again. I learned a lot. Feel free to wander over to netperf-talk over at netperf.org if you want to talk some more about the care and feeding of netperf. happy benchmarking, rick jones