Date: Sun, 16 Jan 2005 10:01:21 +0100 From: Bernd Walter <ticso@cicely12.cicely.de> To: Wilko Bulte <wb@freebie.xs4all.nl> Cc: freebsd-alpha@freebsd.org Subject: Re: processor type. Message-ID: <20050116090120.GB57255@cicely12.cicely.de> In-Reply-To: <20050115174943.GB24024@freebie.xs4all.nl> References: <16866.32790.398095.651691@canoe.dclg.ca> <20050114202618.GA17050@freebie.xs4all.nl> <20050114210716.GA17430@freebie.xs4all.nl> <200501141632.37649.jhb@FreeBSD.org> <20050114224523.GA17854@freebie.xs4all.nl> <20050115084052.GA22832@freebie.xs4all.nl> <20050115090604.GI43380@cicely12.cicely.de> <20050115094833.GA23111@freebie.xs4all.nl> <20050115174943.GB24024@freebie.xs4all.nl>
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On Sat, Jan 15, 2005 at 06:49:43PM +0100, Wilko Bulte wrote: > On Sat, Jan 15, 2005 at 10:48:33AM +0100, Wilko Bulte wrote.. > > On Sat, Jan 15, 2005 at 10:06:05AM +0100, Bernd Walter wrote.. > > > On Sat, Jan 15, 2005 at 09:40:53AM +0100, Wilko Bulte wrote: > > > > On Fri, Jan 14, 2005 at 11:45:23PM +0100, Wilko Bulte wrote.. > > > > > NO_CPU_COPTFLAGS=true # Don't add -march=<cpu> to COPTFLAGS automatically > > > > > > > > > > fixes it on RELENG_4 > > > > > > > > Well, the elapsed wall clock time for a buildworld running an ev5 world > > > > versus running an ev6 world is only roughly 2 or 3 minutes in favor of a ev6 > > > > world on a elapsed time of roughly 75 minutes. This is on a DS10 600MHz > > > > > > > > Not too interesting in my book > > > > > > I wonder if the build environment was compiled using those flags too or > > > just the resulting binaries. > > > > To clarify: my tests were 'make buildworlds'. The first number was while > > building running a EV5 optimised world to do so, the second used the EV6 > > world. > > > > I have not tried to build an EV5 buildworld using the EV6 world > > (so in other words an empty /etc/make.conf). The machine is currently > > churning on RC3 for re@ so I cannot go try it. > > More numbers, this time for a buildrelease of 4.11-RC > > while running an 'ev5 world' 32086.29 real 23579.73 user 3221.72 sys > while running an 'ev6 world' 30268.58 real 22634.77 user 3285.35 sys What I mean is that the buildtools are build without CPUTYPE, so that you can buildworld for a ev6 system on a ev5 machine. You are likely not using special ev6 binaries very long. This is part from an i386 buildworld: cc -O2 -pipe -I. -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr\" -I/var/d6/obj/var/d7/builder/c30-2005-01-16/src/gnu/usr.bin/cc/cc_tools/../cc_tools -I/var/d7/builder/c30-2005-01-16/src/gnu/usr.bin/cc/cc_tools/../cc_tools -I/var/d7/builder/c30-2005-01-16/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc -I/var/d7/builder/c30-2005-01-16/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc/config -DGENERATOR_FILE -I/usr/obj/var/d7/builder/c30-2005-01-16/src/i386/legacy/usr/include -c /var/d7/builder/c30-2005-01-16/src/gnu/usr.bin/cc/cc_tools/../../../../contrib/gcc/genattr.c I have CPUTYPE?=i586 in /etc/make.conf, since the currently build compiler is part of the buildchain it was not used here. And that's the compiler that will have to do the real work later. -- B.Walter BWCT http://www.bwct.de bernd@bwct.de info@bwct.de
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