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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.
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