Date: Fri, 14 Jan 2005 10:11:21 -0800 From: "David O'Brien" <obrien@freebsd.org> To: Wilko Bulte <wb@freebie.xs4all.nl> Cc: freebsd-alpha@freebsd.org Subject: Re: processor type. Message-ID: <20050114181121.GC12260@dragon.nuxi.com> In-Reply-To: <20050114074336.GA97061@freebie.xs4all.nl> References: <16866.32790.398095.651691@canoe.dclg.ca> <20050114002651.GD29445@dragon.nuxi.com> <20050114074336.GA97061@freebie.xs4all.nl>
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On Fri, Jan 14, 2005 at 08:43:37AM +0100, Wilko Bulte wrote: > On Thu, Jan 13, 2005 at 04:26:51PM -0800, David O'Brien wrote.. > > That said, you should remove the -mtune=ev5 or change it to -mtune=ev4. > > My guess is you won't notice a difference, but this this change will > > produce the best code for your machine. > > Any idea how drastic -mtune=ev6 would change things on a DS10 (to name > a random box ;-) ? > > Am I correct in assuming that -mcpu=ev4 will result in not using the BWX > etc of the newer CPUs? And that -mcpu=ev6 will result in code that does > not run on anything older than EV6 due to missing instructions etc? Yes, you certainly want to use -mcpu=ev6 on your own DS10. :-) Along with -mtune=ev6 or no -mtune. -- -- David (obrien@FreeBSD.org)
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