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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!vic.news.telstra.net!act.news.telstra.net!psgrain!iafrica.com!pipex-sa.net!plug.news.pipex.net!pipex!tank.news.pipex.net!pipex!oleane!in2p3.fr!swidir.switch.ch!nntp.coast.net!howland.reston.ans.net!swrinde!newsfeed.internetmci.com!zdc!zdc-e!szdc-e!news From: "John S. Dyson" <toor@dyson.iquest.net> Newsgroups: comp.os.linux.networking,comp.unix.bsd.freebsd.misc Subject: Re: TCP latency Date: Thu, 18 Jul 1996 10:50:44 -0500 Organization: John S. Dyson's home machine Lines: 33 Message-ID: <31EE5D54.167EB0E7@dyson.iquest.net> References: <4paedl$4bm@engnews2.Eng.Sun.COM> <31E106AF.41C67EA6@dyson.iquest.net> <4rvmtf$ven@linux.cs.Helsinki.FI> <31E3D9E2.41C67EA6@dyson.iquest.net> <4s5bl2$qpg@linux.cs.Helsinki.FI> <31E664EB.167EB0E7@inuxs.att.com> <4s67sk$oa9@fido.asd.sgi.com> <31E6B8AB.3E6C@indy.celebration.net> <4s7j2r$blf@fido.asd.sgi.com> <31E7BD6F.167EB0E7@dyson.iquest.net> <4s8sau$jsh@fido.asd.sgi.com> <31E80933.41C67EA6@dyson.iquest.net> <4saf55$dl5@verdi.nethelp.no> <87k9w6g6u4.fsf@localhost.xs4all.nl> <31E9D0CC.41C67EA6@dyson.iquest.net> <87ybklz05q.fsf@localhost.xs4all.nl> <31EAD699.41C67EA6@dyson.iquest.net> <87ohle1v5h.fsf@localhost.xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.0b5aGold (X11; I; FreeBSD 2.2-CURRENT i386) Xref: euryale.cc.adfa.oz.au comp.os.linux.networking:45705 comp.unix.bsd.freebsd.misc:23942 Peter Mutsaers wrote: > > *Local* Communication bandwidths in megabytes/second > ---------------------------------------------------- > Host OS Pipe TCP File Mmap Bcopy Bcopy Mem Mem > reread reread (libc) (hand) read write > --------- ------------- ---- ---- ------ ------ ------ ------ ---- ----- > plm.xs4al FreeBSD 2.2-C 42 10 28 39 26 25 49 45 > plm Linux 2.0.5 24 9 26 43 26 25 49 46 > > FreeBSD's pipe bandwidth was 25, now is 42! Has it really improved > that much or is the benchmark inaccurate? > The benchmark result reflects an improvement in the code. :-) > > By the way, I also ran iozone on FreeBSD's UFS and on Linux's > ext2fs. I use a NCR 815 SCSI controller, and read/wrote a 50MB file. > > FreeBSD 512b records: wrote 1.99 M/s, read 2.49 M/s > 8192b records: wrote 1.95 M/s, read 2.62 M/s > > Linux 512b records: wrote 2.90 M/s, read 3.98 M/s > 8192b records: wrote 3.40 M/s, read 4.40 M/s > EEEK!!! I'll look into that, hopefully it is just a fragged filesystem!!! John