Date: Wed, 14 Jan 2004 07:26:12 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Robert Watson <rwatson@freebsd.org> Cc: current@freebsd.org Subject: Re: make -j 4 is really make -j 8 for buildworld? Message-ID: <17255.1074061572@critter.freebsd.dk> In-Reply-To: Your message of "Wed, 14 Jan 2004 00:22:12 EST." <Pine.NEB.3.96L.1040114001713.40206A-100000@fledge.watson.org>
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In message <Pine.NEB.3.96L.1040114001713.40206A-100000@fledge.watson.org>, Robe rt Watson writes: > >A few times in the past, I've noticed that when I run 'make -j4 >buildworld', I frequently run with load averages between 8 and 10 on one >of my boxes at work. Recently, I actually sat around with ps -ax for a >bit, and found that frequently, 8 different compiler/assembler instances >are running at once, rather than the four I expect: The N in -jN is a relative measure of parallelism which has nothing to do with how many processes are run. That depends on parallism in the Makefiles and how subdirs are entered. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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