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Date: Mon, 24 Nov 1997 21:13:35 -0800 (PST)
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Organization: Me, Just me...
From: Simon Shapiro <shimon@simon-shapiro.org>
To: Amancio Hasty <hasty@rah.star-gate.com>
Subject: Re: make world time???/
Cc: Shimon@i-connect.net, current@FreeBSD.ORG, smp@csn.net, sprice@hiwaay.net,
        toor@dyson.iquest.net, Eivind Eklund <perhaps@yes.no>
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On 19-Nov-97 Amancio Hasty wrote:
> Hi,
> 
> I wish we could do sub-minute compiles 8)
> make world started on Tue Nov 18 22:31:50 PST 1997
> make world completed on Tue Nov 18 23:44:02 PST 1997
> 
> So it takes about 75 minutes to do a make world over here and
> again 8)
> 
> I have a Pentium Pro 200Mhz , 48MB , 4.3 Seagate Cheetah (10000
> rpms).
> 
> mount -u -o async,noatime /usr 
> cd /usr/src
> make clean  #if you already have a clean obj or no /usr/obj populated
>             #there is no need to do this step.
> make world >build.log
> 
> /etc/make.conf modified flags:
> NOCLEAN=true
> CFLAGS= -O  -pipe
> 
> kernel config file special flags :
> options AHC_TAGENABLE
> options AHC_SCBPAGING_ENABLE
> options AHC_ALLOW_MEMIO
> 
> Without the above your world build time will probably be double if
> you are doing your system build on your scsi disk drives.
> 
> I suspect that mounting a /usr/obj on a fast scsi or IDE drive is 
> not going to lower my performance figures. We need to experiment
> to find out whats going on fast system builds.

Yup.  Look elsewhere from the disk I/O.  It is NOT being stressed.
 

If Microsoft Built Cars:

There would be an "Engine Pro" with bigger turbos, but it would be
slower on most existing roads.


Sincerely Yours, 

Simon Shapiro
Shimon@Simon-Shapiro.ORG                      Voice:   503.799.2313