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Date: Wed, 2 Apr 2003 09:58:55 +0300
From: Ruslan Ermilov <ru@FreeBSD.org>
To: Bruce Evans <bde@zeta.org.au>
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cc: Jonathan Lemon <jlemon@FreeBSD.org>
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Subject: Re: depend + all vs dependall
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On Sun, Mar 30, 2003 at 04:12:09PM +1000, Bruce Evans wrote:
[...]
> > time make buildworld -j 8 -s
>=20
> Note that all benchmarks using -j are invalid because of nondeterministic
> wait times of up to 100 msec for each job.  This pessimizes makeworld -j 4
> times by about 20% on a non-dual Athlon XP1600, and can't do good things
> for the variance.  The pessimization is larger on faster machines of
> course.  This is fixed in NetBSD.  FreeBSD only has the hackaround of
> reducing the timeout from 500 msec to 100 msec.
>=20
FreeBSD also provides disabled at the moment kqueue(2) based
implementation of the above wait.  Now that Jonathan is back,
perhaps he could look into the issues if they still exist?


Cheers,
--=20
Ruslan Ermilov		Sysadmin and DBA,
ru@sunbay.com		Sunbay Software AG,
ru@FreeBSD.org		FreeBSD committer,
+380.652.512.251	Simferopol, Ukraine

http://www.FreeBSD.org	The Power To Serve
http://www.oracle.com	Enabling The Information Age

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