Date: Wed, 10 Sep 1997 05:37:09 -0700 From: David Greenman <dg@root.com> To: dkelly@hiwaay.net Cc: robsch@robkaos.ruhr.de (Robert Schien), hardware@FreeBSD.ORG Subject: Re: 'make world' on P6 system takes 3 h Message-ID: <199709101237.FAA06597@implode.root.com> In-Reply-To: Your message of "Wed, 10 Sep 1997 07:12:41 CDT." <199709101212.HAA05906@nospam.hiwaay.net>
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>Robert Schien writes: >> >> I have the impression that there is something wrong with my >> P6 system. 'make world' (3.0-current) takes 3 hours! >> >> The hardware is: >> Asus P6NP5 motherboard with 64 MB EDO, 200 MHz PentiumPro (256k). >> Asus SC-200 SCSI host adapter >> 4 GB IBM DCAS hard disk (this is where /usr/src and /usr obj reside). > >I have a PPro 166 with 512k cache, 32M FP RAM, 2G Barracuda, 2940. "make >world" for 2.2.2 (recent cvsup) takes 2:47. Mounting /usr with "-o async" >drops that time to 2:15. It was interesting to note "time" reported >almost exactly the same amount of time in CPU for both. > >dg@root.com said: >> >CFLAGS= -O2 -m486 -pipe >> Make that "-O" and kill the -m486. The -O2 nearly doubles the >> compile time and provides almost no measurable improvement in most >> cases. > >Was -O the default at some time during 2.x's life? I remember my old MB >could "make world" in 5 hours or so once, and was up to 9 hours by the >time I replaced it. -O is still the default. The commented out CFLAGS in make.conf should probably be changed to more closely match the default - the main reason it there is to remind people about the -pipe option (which, with memory prices the way they are, should probably be made the default). -DG David Greenman Core-team/Principal Architect, The FreeBSD Project
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