Date: Mon, 03 Jun 2002 15:34:14 -0700 From: Kent Stewart <kstewart@owt.com> To: Chris Pepper <pepper@reppep.com> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: make -j4 becoming default? Message-ID: <3CFBEEE6.30902@owt.com> References: <p05111a16b9218b533fc1@[129.85.219.160]>
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Chris Pepper wrote: > <http://www.freebsd.org/handbook/makeworld.html>; recommends -j4 for > "make buildworld". I've tried using it with various ports, and it works > with some, but prevents others (so far, bind9, net-snmp, and imap-uw) > from building. > > Obviously, I'd like to use -j4 wherever possible, and it's > suboptimal to try everything multi-threaded, then sometimes fail and > manually fall back to single-threaded. Even worse, I usually forget -j4 > for thread-safe builds, so I waste time unnecessarily. You should really time a buildworld. The only time the realtime is faster for me is when I have dual cpus. The 3rd field, which is the realtime, is frequently 10% faster than -j4 on an AMD-1600+ XP. Kent > > Are there any plans to allow a default -j setting, and identify > certain packages as requiring single-threaded making? One possibility > that's occurred to me is to set MAKE_THREADS=4 and leave MAKE_THREADED > unset in /etc/defaults/make.conf. > > Multi-threadable Makefiles, including /usr/src/Makefile, could set > MAKE_THREADED="YES", and single-threaded Makefiles (/usr/ports/Makefile, > to start) could set MAKE_THREADED="NO". Then the make command could be > enhanced to set -j from MAKE_THREADS if MAKE_THREADED is YES. > > Are there gaping holes in this idea? Is there a better method > waiting in the wings? > > > Thanks, > > > Chris Pepper -- Kent Stewart Richland, WA http://users.owt.com/kstewart/index.html To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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