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Date:      Sat, 07 Oct 2000 00:20:45 -0700
From:      Ted Faber <faber@lunabase.org>
To:        kstewart@urx.com
Cc:        Ken Bolingbroke <freebsd@bolingbroke.com>, FreeBSD Stable <stable@FreeBSD.ORG>
Subject:   Re: `time make buildworld'
Message-ID:  <200010070720.e977KjZ00940@praxis.lunabase.org>
In-Reply-To: "Your message of Sat, 07 Oct 2000 00:08:48 PDT." <39DECC00.71E81EF1@urx.com>

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Kent Stewart wrote:
>> Now, I couldn't see that buildworld for 3.5-S would take 12 hours, then on
>> the same machine, buildworld for 4.1.1-S would take nearly 75 hours.
>> Besides the upgrade from 3.5 to 4.1.1, the only change was that I mounted
>> all non-root partitions with softupdates enabled.
>> 
>> So, I disable softupdates on all partitions and try again.  Now it only
>> takes 44 hours and 30 minutes to buildworld.  Only, ha.
>> 
>> So what's happening here?  Softupdates slow down buildworld?  4.1.1 does
>> buildworld slower than 3.5 and earlier?  Or 4.1.1 buildworld takes a lot
>> longer than earlier versions?  Or my system is just weird?
>
>I'm assuming weird up front. I find a 4.1.1 BW takes 36xxu and 1:23 of
>clock time on my P-II 400 with 256MB of memory and UDMA33 HD's. You
>p133 should be about 6x or more slower as a guess. I think your
>differences, based on really minimal information, are probably due to
>the kind of HD's you have and how much memory.

FYI, I just built 4.1.1-STABLE on my P133 running 4.1-STABLE, 32MB
memory, 256MB swap, and it took about 6 hours (359 mins, as I recall).
I can confirm that number if you think it would be helpful.
Softupdates are off.  Separate disks for source and object (an
articact, not an intentional performance enhancement).  dmesg and
other info on request.



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