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From: "Gayn Winters" <gayn.winters@bristolsystems.com>
To: "'Kris Kennaway'" <kris@obsecurity.org>,
	"'Gary Thorpe'" <gthorpe@myrealbox.com>
Date: Fri, 20 Jan 2006 15:28:08 -0800
Organization: Bristol Systems Inc.
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Cc: 'Wesley Shields' <wxs@csh.rit.edu>,
	'Ashok Shrestha' <ashok.shrestha@gmail.com>,
	'Brandon Flowers' <flowersster@gmail.com>,
	'Mike Meyer' <mwm@mired.org>, freebsd-hackers@freebsd.org,
	'Dag-Erling Sm?rgrav' <des@des.no>
Subject: RE: speed up port compiling using RAM (tmpfs) ???
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> [mailto:owner-freebsd-hackers@freebsd.org] On Behalf Of Kris Kennaway
> Sent: Friday, January 20, 2006 11:47 AM
> To: Gary Thorpe
> Cc: Wesley Shields; Ashok Shrestha; Brandon Flowers; Kris 
> Kennaway; Mike Meyer; freebsd-hackers@freebsd.org; Dag-Erling Sm?rgrav
> Subject: Re: speed up port compiling using RAM (tmpfs) ???
> 
> 
> On Fri, Jan 20, 2006 at 11:49:29AM -0500, Gary Thorpe wrote:
> 
> > >-j is not safe to use with port builds since many ported software
> > >contain race conditions in the build.
> > >
> > >Kris
> > 
> > This effectively means that you cannot take advantage of SMP to
compile 
> > FreeBSD's ports collection. That sounds like a big 
> > limitation...especially for people trying to speed up bulk builds.
> 
> Yeah, but what do you propose to do about it?  We have 14000 ports
> that need to be inspected for build race conditions and fixed before
> you can turn on -j by default.
> 
> Kris


With a dual processor (even dual core?) is there a way to assign the big
make to one processor and to assign the foreground activity (email,
edits, etc) to another?  Is SMP somehow smart enough to do this
automagically?

-gayn