Message-ID: <19990520160622.20808@atrey.karlin.mff.cuni.cz>
Date: Thu, 20 May 1999 16:06:22 +0200
From: Jan Hubicka <hubicka AT atrey DOT karlin DOT mff DOT cuni DOT cz>
To: pgcc AT delorie DOT com
Subject: Re: Benchmark PGCC vs EGCS on a K6-2
References: <3743ADE8 DOT C938ADBB AT informatik DOT hu-berlin DOT de> <Pine DOT NEB DOT 3 DOT 96 DOT 990520070839 DOT 20661O-100000 AT slavery DOT tainted DOT org>
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In-Reply-To: <Pine.NEB.3.96.990520070839.20661O-100000@slavery.tainted.org>; from JAmes Atwill on Thu, May 20, 1999 at 07:17:52AM -0400
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> On Thu, 20 May 1999, Jens-Uwe Rumstich wrote:
> 
> > I still donīt know, why my results are that wrong :-(
> 
> Running benchmarks on a living breathing system generally isn't advised.
> If you're running this on your own personal computer at home, some tips
> (from experience).
> 
> o Quit X.  If you can't, kill off, or suspend as many of the X processes
> you've got as you can (other xterms, xpdf, xemacs, etc..)
> o Stop crond.   /etc/rc.d/init.d/crond stop
> o Stop atd.     /etc/rc.d/init.d/atd stop
> o Stop inetd.   /etc/rc.d/init.d/inet stop
> o Kill off any other servers which make your system accessable from the
>   outside (apache, postfix/qmail/sendmail, innd, bind, dhcpd, etc..)
> o sync your disks (type "sync")
> o Don't play mp3's (hey, i only did it once!)
> o Check with "top" and make sure that nothing that could suddenly pipe up
>   is running.  
> o Try to lower the amount of I/O that a test does (unless testing I/O
>   speeds).
> o Run your test 3-4 times ("% time ./mytest") to get a feel for how long
>   it takes and to negate (if applicable) the 2.2.x caching system. 
> o Run the actual test a couple times and average the result.
Good :) Other trick is to run test with root privilegies, ask for IO privilegies
and do cli.... thats what I am doing sometimes....

Problem with K6 is, that it seems to be sinsitive for memory layout. So
cleaning up memory by starting some large program or rebooting is recommended
as well...


Honza
> 
> 	JAmes
> 

-- 
                       OK. Lets make a signature file.
+-------------------------------------------------------------------------+
|        Jan Hubicka (Jan Hubi\v{c}ka in TeX) hubicka AT freesoft DOT cz         |
|         Czech free software foundation: http://www.freesoft.cz          |
|AA project - the new way for computer graphics - http://www.ta.jcu.cz/aa |
|  homepage: http://www.paru.cas.cz/~hubicka/, games koules, Xonix, fast  |
|  fractal zoomer XaoS, index of Czech GNU/Linux/UN*X documentation etc.  | 
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