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Date:      Tue, 10 Feb 2009 17:07:03 +0100
From:      Nick Hibma <nick@van-laarhoven.org>
To:        svn-src-all@freebsd.org
Subject:   Re: svn commit: r188439 - head/release
Message-ID:  <200902101707.03977.nick@van-laarhoven.org>
In-Reply-To: <9bbcef730902100753p484d633j29829019064e71bf@mail.gmail.com>
References:  <200902101511.n1AFBQXx096922@svn.freebsd.org> <1234279584.65150.13.camel@bauer.cse.buffalo.edu> <9bbcef730902100753p484d633j29829019064e71bf@mail.gmail.com>

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> 2009/2/10 Ken Smith <kensmith@cse.buffalo.edu>:
> > I wouldn't mind if it got turned on but that's just the first of two
> > questions.  The second question is what to set it to.  What's best for
> > that depends on how many CPUs you've got and/or how much of your
> > machine you want the build to consume (you might want to be doing other
> > stuff on the machine while the build is running...).  IMHO it might be
> > best to just leave it as-is and let anyone interested in getting better
> > performance set it to what's appropriate for their machine but if
> > others feel differently I won't object.
>
> I was think more about the semi-supported state that the -jX
> traditionally has - it's usually something like "yes, it's there and
> probably everyone uses it but we won't even suggest it actually
> works". Having it on in the official release process will signal
> official support to users and encourage them to use it.

With the advent of multiple cores it is well worth doing at least a 

	-j`sysctl -n kern.smp.cpus`

(assuming that value is always available, even in the non-SMP case) so the 
parallel build gets exercised.

Nick



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