Date: Sun, 07 Jul 2013 14:15:01 -0700 From: Alfred Perlstein <alfred@freebsd.org> To: Garrett Cooper <yaneurabeya@gmail.com> Cc: "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r253002 - head Message-ID: <51D9DA55.2090808@freebsd.org> In-Reply-To: <9D4C7540-A3B0-45E5-8219-6A455D41DF70@gmail.com> References: <201307072039.r67KdCdR028908@svn.freebsd.org> <9D4C7540-A3B0-45E5-8219-6A455D41DF70@gmail.com>
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On 7/7/13 2:01 PM, Garrett Cooper wrote: > Why the magic number 12? Numbers higher seem to result in worse performance as reported by some members of my team. -Alfred > > Sent from my iPhone > > On Jul 7, 2013, at 1:39 PM, Alfred Perlstein <alfred@FreeBSD.org> wrote: > >> Author: alfred >> Date: Sun Jul 7 20:39:11 2013 >> New Revision: 253002 >> URL: http://svnweb.freebsd.org/changeset/base/253002 >> >> Log: >> Document tip on how to build all kernels quickly. >> >> Modified: >> head/Makefile >> >> Modified: head/Makefile >> ============================================================================== >> --- head/Makefile Sun Jul 7 19:58:14 2013 (r253001) >> +++ head/Makefile Sun Jul 7 20:39:11 2013 (r253002) >> @@ -32,6 +32,12 @@ >> # targets - Print a list of supported TARGET/TARGET_ARCH pairs >> # for world and kernel targets. >> # toolchains - Build a toolchain for all world and kernel targets. >> +# >> +# "quick" way to test all kernel builds: >> +# _jflag=`sysctl -n hw.ncpu` >> +# _jflag=$(($_jflag * 2)) >> +# [ $_jflag -gt 12 ] && _jflag=12 >> +# make universe -DMAKE_JUST_KERNELS JFLAG=${jflag} >> # >> # This makefile is simple by design. The FreeBSD make automatically reads >> # the /usr/share/mk/sys.mk unless the -m argument is specified on the >> _______________________________________________ >> svn-src-head@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/svn-src-head >> To unsubscribe, send any mail to "svn-src-head-unsubscribe@freebsd.org"
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