From owner-freebsd-stable Sun Sep 16 17:41:52 2001 Delivered-To: freebsd-stable@freebsd.org Received: from dc-mx04.cluster1.charter.net (dc-mx04.cluster0.hsacorp.net [209.225.8.14]) by hub.freebsd.org (Postfix) with ESMTP id 3AEEE37B418 for ; Sun, 16 Sep 2001 17:41:47 -0700 (PDT) Received: from [24.217.157.157] (HELO there) by dc-mx04.cluster1.charter.net (CommuniGate Pro SMTP 3.4.6) with SMTP id 29926100; Sun, 16 Sep 2001 20:47:53 -0400 Content-Type: text/plain; charset="iso-8859-1" From: Dave Uhring To: "David W. Chapman Jr." , Cyrille Lefevre Subject: Re: make -j4 vs -j8... 4 works, but 8 does not Date: Sun, 16 Sep 2001 19:41:42 -0500 X-Mailer: KMail [version 1.3] Cc: Erik Trulsson , stable@FreeBSD.ORG References: <20010916003359.A48953@student.uu.se> <200109170009.f8H09Y921584@gits.dyndns.org> <20010916191219.H76323@leviathan.inethouston.net> In-Reply-To: <20010916191219.H76323@leviathan.inethouston.net> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Message-ID: Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG 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