Date: Sat, 15 Jan 2005 10:48:33 +0100 From: Wilko Bulte <wb@freebie.xs4all.nl> To: ticso@cicely.de Cc: freebsd-alpha@freebsd.org Subject: Re: processor type. Message-ID: <20050115094833.GA23111@freebie.xs4all.nl> In-Reply-To: <20050115090604.GI43380@cicely12.cicely.de> 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>
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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. > One should also consider that compiling binaries with more optimization > usually takes additional cycles too. True. > I wouldn't have been surprised if the result would have been taken > longer also the binaries were faster. That one would hope yes. -- Wilko Bulte wilko@FreeBSD.org
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