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Path: euryale.cc.adfa.oz.au!newshost.anu.edu.au!harbinger.cc.monash.edu.au!news.rmit.EDU.AU!news.unimelb.EDU.AU!munnari.OZ.AU!news.mel.connect.com.au!news.mira.net.au!vic.news.telstra.net!act.news.telstra.net!psgrain!usenet.eel.ufl.edu!tank.news.pipex.net!pipex!oleane!jussieu.fr!esiee.fr!sgigate.sgi.com!mr.net!newshub.tc.umn.edu!zib-berlin.de!irz401!orion.sax.de!uriah.heep!news From: j@uriah.heep.sax.de (J Wunsch) Newsgroups: comp.unix.bsd.freebsd.misc Subject: Re: Q: What exactly does the time command tell me? Date: 14 Jun 1996 23:33:27 GMT Organization: Private BSD site, Dresden Lines: 21 Message-ID: <4psss7$j31@uriah.heep.sax.de> References: <4pmrgv$6kv@bert.eecs.uic.edu> 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 jscholvi@bert.eecs.uic.edu (John Scholvin) wrote: > The subject about covers it: I'm running some fairly long simulations for my > master's thesis, and I need to know how long it's taking them to run. The > time(1) command prints out three things: "real" time, "user" time, and > "system" time. I've gathered that "real" time is wall clock time, and that > "system" time is the amount of time the process in question spends in > kernel. I would think that the "user" time is the number I'm interested in, > how much time the processor is actually spending on my program, right? No, you are interested in s+u. ``system time'' is the time that is accounted on behalf of your process running in system mode (i.e. syscall processing that is done on behalf of your process; as opposed to interrupt processing which is not done on behalf of any process). -- 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. ;-)