Date: Fri, 2 May 1997 14:00:08 -0700 (MST) From: Terry Lambert <terry@lambert.org> To: bsdhack@shadows.aeon.net (mika ruohotie) Cc: hackers@FreeBSD.ORG Subject: Re: make flags Message-ID: <199705022100.OAA09474@phaeton.artisoft.com> In-Reply-To: <199705021852.VAA03005@shadows.aeon.net> from "mika ruohotie" at May 2, 97 09:52:14 pm
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> something that made me wonder... > > earlier today i read about 'make -j' stuff from the smp list, and i > got the impression that for single cpu something like '-j 4' would > give some performance boost. > > but, i experimented with it myself earlier today and it didnt boost > anything... the fastest compiling i got without any 'j's, i tested > '-j 2' and '-j 4' > > uh, am i missing something? it's only pentium pro spesific? (i have pentium) > > my other kernel flags are '-O2 -pipe' The makefiles must be "-j" aware. For a build world, this includes modifying "/etc/make.conf". There's a lot of changes that went into makeing -j work down to inferior makefiles (check out the "parallel make" thread in the -current archives). All in all, I don't think you'd get much of a win from anything other than -current with the changes in place. Someone needs to cookbook this. Personally, I always build the absolute minimum I need to build, and would be just as happy with a build process that installed and cleaned behind itself on a per item basis so as to never require more than one utility worth of object tree space at any one time. So I'm not a good choice to cookbook parallel makes. 8-(. Regards, Terry Lambert terry@lambert.org --- Any opinions in this posting are my own and not those of my present or previous employers.
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