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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!munnari.OZ.AU!news.ecn.uoknor.edu!news.eng.convex.com!newshost.convex.com!bcm.tmc.edu!cs.utexas.edu!uwm.edu!news.moneng.mei.com!bloom-beacon.mit.edu!news.mathworks.com!fu-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.os.linux.networking,comp.unix.bsd.netbsd.misc,comp.unix.bsd.freebsd.misc Subject: Re: TCP latency Date: 17 Jul 1996 13:18:44 GMT Organization: Private BSD site, Dresden Lines: 16 Message-ID: <4sip7k$3tl@uriah.heep.sax.de> References: <4paedl$4bm@engnews2.eng.sun.com> <4s8cuq$ljd@bertrand.ccs.carleton.ca> <31E7C0DD.41C67EA6@dyson.iquest.net> <4s8tcn$jsh@fido.asd.sgi.com> <31E80ACA.167EB0E7@dyson.iquest.net> <4sadde$qsv@linux.cs.helsinki.fi> <31E9E3A7.41C67EA6@dyson.iquest.net> <4sefde$f0l@fido.asd.sgi.com> <s8hgr8nga9.fsf@sphinx.nuclecu.unam.mx> <4sgusn$4tr@verdi.nethelp.no> Reply-To: joerg_wunsch@uriah.heep.sax.de (Joerg Wunsch) NNTP-Posting-Host: localhost.heep.sax.de Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Newsreader: knews 0.9.6 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Xref: euryale.cc.adfa.oz.au comp.os.linux.networking:45561 comp.unix.bsd.netbsd.misc:4097 comp.unix.bsd.freebsd.misc:23850 sthaug@nethelp.no (Steinar Haug) wrote: > Having a fast gettimeofday() is actually useful in lots of ways. I never > understood why gettimeofday() couldn't simply be reading a timeval which > was mapped into the process virtual address space. No muss, no fuss. You have to read the i8253 counter residual value on an i[34]86 in order to get a resolution better than the (fairly poor) clock rate. That's nothing that should be done in a library. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-)