*BSD News Article 43517


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Xref: sserve comp.os.386bsd.questions:17060 comp.unix.bsd.freebsd.misc:93
Newsgroups: comp.os.386bsd.questions,comp.unix.bsd.freebsd.misc
Path: sserve!newshost.anu.edu.au!harbinger.cc.monash.edu.au!msunews!agate!howland.reston.ans.net!ix.netcom.com!netcom.com!hasty
From: hasty@netcom.com (Amancio Hasty Jr)
Subject: Re: Kernel rebuild times (was Re: Suggestion on recompiling kernel)
Message-ID: <hastyD5pyuG.5G5@netcom.com>
Organization: Netcom Online Communications Services (408-241-9760 login: guest)
References: <3keq9c$oht@gate.sinica.edu.tw> <3kffb3$am1@park.uvsc.edu> <3kg5lu$1ev@news.cloud9.net>
Date: Mon, 20 Mar 1995 03:25:27 GMT
Lines: 41
Sender: hasty@netcom14.netcom.com

In article <3kg5lu$1ev@news.cloud9.net> cs@cloud9.net (Carl S. Shapiro) writes:
>Terry Lambert (terry@cs.weber.edu) wrote:
>: taob@gate.sinica.edu.tw (Brian Tao) wrote:
>: ]     Both machines have 16 megs real and 256K cache.  The 486/66 has 32
>: ] megs swap and the 486/100 has 64 megs swap (not that the amount of
>: ] swap should make any difference).  So, again, why would one machine
>: ] with a slower CPU and slower bus compile the kernel just as quickly as
>: ] the faster machine?  This isn't life-and-death or anything, but I'm
>: ] terribly curious.  :)
>
>: Because you fell for marketing hype and it's not a faster machine.
>
>	Dam!  It took me... say... 2.5 hours to build FreeBSD 2.0 on
>my 486 DX2/66 with 20 megs ram, 32 megs swap, and 256k cache.  I

Break the problem down and determine what is the bottle neck.

Ideally, there should be a set of  programs to check the cpu , memory,
cache speed, etc..  I don't have a set  right out of the top my head.

Start with a freshly booted system and with no X running.

I would run "iozone auto" just to make sure that your disk sub-system
is at least performing.

run top make sure that you don't have something running on the
background chewing up the cpu time.

Next I would time  the compilation of a few kernel modules and 
post the results. (pick a whole sub-system like NFS).

Amancio




-- 
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	Amancio Hasty,  Consultant 
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