Date: Sun, 16 Sep 2001 19:41:42 -0500 From: Dave Uhring <duhring@charter.net> To: "David W. Chapman Jr." <dwcjr@inethouston.net>, Cyrille Lefevre <clefevre@citeweb.net> Cc: Erik Trulsson <ertr1013@student.uu.se>, stable@FreeBSD.ORG Subject: Re: make -j4 vs -j8... 4 works, but 8 does not Message-ID: <auto-000029926100@dc-mx04.cluster1.charter.net> In-Reply-To: <20010916191219.H76323@leviathan.inethouston.net> References: <20010916003359.A48953@student.uu.se> <200109170009.f8H09Y921584@gits.dyndns.org> <20010916191219.H76323@leviathan.inethouston.net>
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On Sunday 16 September 2001 07:12 pm, David W. Chapman Jr. wrote: > On Mon, Sep 17, 2001 at 02:09:34AM +0200, Cyrille Lefevre wrote: > > j1 12:36 > > j2 12:46 > > j4 11:36 > > j8 11:21 > > > > so, for a 12 min job, you could win 1 min using -j4, which may gives > > you 1 hour for a 12 hours job (such as buildworld :). ok, it's not so > > many, but that may help a lot. for instace, I currently use -j4 since > > -j8 is too CPU and memory intensive (the machine slow down > > significally). > > > > PS : I'm using SCSI disks. using IDE disks probably gives you different > > results. I/O are very differents between the two. > > On my IBM IDE drives with softupdates, tags and write cache enabled, > on my thunderbird 1100 with 256mb ram, I only do -j5 or -j6 at most. > I can't seem to get my buildworlds lower than 40 mins. With a T-Bird 850 and 512MB, IBM-DTLA drive, softupdates, no tags or write cache enabled, and no -j option the buildworld takes 47-48 min. while using the machine for other things also. /etc/defaults/make.conf unchanged from last build. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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