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Subject: Re: [patch 3/3] cell: prevent alignment interrupt on local store
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Olaf Hering <olaf@aepfle.de>
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Date: Thu, 12 Apr 2007 15:26:06 +1000
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Cc: Arnd Bergmann <arnd@arndb.de>, Akinobu Mita <mita@fixstars.com>,
	linuxppc-dev@ozlabs.org, Paul Mackerras <paulus@samba.org>,
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On Thu, 2007-04-12 at 06:23 +0200, Olaf Hering wrote:
> On Wed, Apr 11, Segher Boessenkool wrote:
> 
> > This isn't just a kernel issue either; the same holds
> > for all of userspace.  It seems to me the only way to
> > get good performance on both Cell and all other platforms
> > is to have a separate binary distribution for Cell.
> 
> How much will this impact performance on a 970, 74xx or POWER6 if
> everything gets compiled with '--mcpu=$cell', compared to what is used
> today? One gets at least altivec that way.

Gets altivec and stops working on POWER5 ? no deal :-)

Ben.