Date: Tue, 22 Jan 2002 14:04:31 -0700 From: Greg Rumple <grumple@zaphon.llamas.net> To: freebsd-stable@freebsd.org Subject: Re: make -j4 world Message-ID: <20020122140431.R69194@zaphon.llamas.net> In-Reply-To: <20020122125645.1a0c9b36.sreese@codysbooks.com>; from sreese@codysbooks.com on Tue, Jan 22, 2002 at 12:56:45PM -0800 References: <5.1.0.14.0.20020122145124.03cd1380@marble.sentex.ca> <5.1.0.14.0.20020122145124.03cd1380@marble.sentex.ca> <5.1.0.14.0.20020122151930.03d62220@marble.sentex.ca> <3C4DCB91.7080701@owt.com> <3C4DCDE7.C5E77C03@math.missouri.edu> <20020122125645.1a0c9b36.sreese@codysbooks.com>
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* Scott Reese (sreese@codysbooks.com) [020122 20:52]: > On Tue, 22 Jan 2002 14:39:03 -0600 > Stephen Montgomery-Smith <stephen@math.missouri.edu> wrote: > > > On the "Error in make buildworld" thread I said that I had this problem > > on 1 out of 3 machines, so you may not necessarily see this problem. I > > only saw this problem on the fastest machine. > > > > I've actually found that on a fast computer (1.6 GHz Pentium IV) using the "-j" > flag tends to slow things down a bit. The standard "make buildworld" ran much > faster and much more smoothly than "make -j4 buildworld." It was the same with > kernel builds. Honestly, with a machine that fast, I don't really see a need > for the "-j" flags anyway. Well the machines I use make -j on are SMP machines, and using -j does make a difference. I tend to use make -j 16 (2 p3-1Ghz cpu's, 2 gigs of ram) in order to finish as rapidly as possible. This is significantly faster than make by it's self. I have actually done a spreadsheet using this machine about 6 months ago, I should do it again. Looking at the benefit of make -j finding the optimial value. I haven't done a CVSUP up today, so not sure if this is happening to me or not. Greg -- Greg Rumple grumple@zaphon.llamas.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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