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Path: euryale.cc.adfa.oz.au!newshost.carno.net.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!lynx.aba.net.au!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!vic.news.telstra.net!act.news.telstra.net!psgrain!charnel.ecst.csuchico.edu!newshub.csu.net!newshub.sdsu.edu!newsfeeder.sdsu.edu!news.sgi.com!news.msfc.nasa.gov!newsfeed.internetmci.com!news.mathworks.com!solaris.cc.vt.edu!server.cs.vt.edu!ceharris From: ceharris@mal.com (Carl Harris) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: 100BaseT tuning considerations? Date: 2 Sep 1996 23:51:17 GMT Organization: Maladjusted Communications Lines: 18 Message-ID: <50frtl$fkp@server.cs.vt.edu> References: <4vin1s$4um@server.cs.vt.edu> <4vsr44$iom@hpindda.cup.hp.com> <4vv36e$dqo@shellx.best.com> Reply-To: ceharris@mal.com NNTP-Posting-Host: mal9000.mal.com X-Newsreader: TIN [version 1.2 PL2] : In article <4vsr44$iom@hpindda.cup.hp.com>, Rick Jones <raj@cup.hp.com> wrote: : >How much CPU does it take for the system to drive 10 Mbit Ethernet to : >saturation? Since the MTU does not increase between 10BT and 100BT : >(nor 1000BT?), the host does not become any more "efficient" at : >sending bulk data. : >So, if you needed 25% of your CPU to go 10 Mbit/s, 40 Mbit/s with : >100BT seems quite reasonable to expect. : > I measured the CPU utilization required to drive 10 Mbit ethernet to saturation at 14-16%, which means that a rate of at 60 Mbit/s or more should be possible. -- Carl Harris Systems Engineer CNS Research and Planning, Virginia Tech ceharris@vt.edu