Date: Tue, 28 Sep 1999 21:44:24 -0500 (CDT) From: David Scheidt <dscheidt@enteract.com> To: Daniel O'Connor <doconnor@gsoft.com.au> Cc: freebsd-smp@freebsd.org, "Adam D. Marks" <amarks@ecst.csuchico.edu> Subject: Re: make question Message-ID: <Pine.NEB.3.96.990928214144.2035C-100000@shell-1.enteract.com> In-Reply-To: <XFMail.990929120916.doconnor@gsoft.com.au>
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On Wed, 29 Sep 1999, Daniel O'Connor wrote: > > > depend on what the limit on performance is. In my machine, the limit is > > almost always disk performance. > > Well I did some benchmarks of doing make buildworld for -current on a -current > box. > > I went from 1 to 20 in steps of 2. From memory the best resulsts where about -j > 12, but that ate a LOT of memory :) > > If you actually want to use your computer while doing a compile then -j 4 is > probably OK. > > The system I did it on was a dual PII-350 with an IDE disk and 128 meg of RAM. I have a dual PII-400, with 256MB. One Ultra2 SCSI disk, and two IDE disks. I get about ~55 minute buildworlds, with idle CPU most of the time, and ~100 disk transactions per disk involved. Memory isn't a factor, either. David To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message
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