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Xref: sserve comp.unix.bsd:6376 comp.unix.ultrix:14288 comp.unix.solaris:342 Newsgroups: comp.unix.bsd,comp.unix.ultrix,comp.unix.solaris Path: sserve!manuel.anu.edu.au!munnari.oz.au!hp9000.csc.cuhk.hk!uakari.primate.wisc.edu!zaphod.mps.ohio-state.edu!sol.ctr.columbia.edu!eff!news.byu.edu!ux1!fcom.cc.utah.edu!cs.weber.edu!terry From: terry@cs.weber.edu (A Wizard of Earth C) Subject: Re: Unix with real time performance ? Message-ID: <1992Oct10.090213.9670@fcom.cc.utah.edu> Sender: news@fcom.cc.utah.edu Organization: University of Utah Computer Center References: <1992Oct9.024816.3814@lna.oz.au> Date: Sat, 10 Oct 92 09:02:13 GMT Lines: 30 In article <1992Oct9.024816.3814@lna.oz.au>, jamesd@lna.oz.au (James D) writes: |> BSD 4.2 sockets and System V messages are all we have tested, so we would |> like to know if anyone else has done any studies on "real-time" Unix. System V IPC facilities on a SparcStation IPX with SunOS 4.1.2, assuming a "one request/one response" architecture with processes in core and not requiring swapping during context switch clock in at about 1265 transactions a second average over 10,000,000 transactions. The low end RS6000 running AIX3.2 comes in at 2215 TPS under the same circumstances. SVR4.0.2 Dell UNIX on a Dell 386/50 (386/25 with clock doubler chip) registers around 2430 (nearly twice as fast as the IPC). I don't have numbers for Solaris 2.0 under the same hardware, but I suspect a significant increase, given Solaris 2.0 performance on semaphores. You should write a benchmark specific to your application architecture and run it to get "real numbers" you can expect to see in your application. Terry Lambert terry@icarus.weber.edu terry_lambert@novell.com --- Any opinions in this posting are my own and not those of my present or previous employers. ------------------------------------------------------------------------------- "I have an 8 user poetic license" - me Get the 386bsd FAQ from agate.berkeley.edu:/pub/386BSD/386bsd-0.1/unofficial -------------------------------------------------------------------------------