From: Arnd Bergmann <arnd@arndb•de>
To: cbe-oss-dev@ozlabs•org
Cc: linuxppc-dev@ozlabs•org, Olaf Hering <olaf@aepfle•de>
Subject: Re: [Cbe-oss-dev] [patch 3/3] cell: prevent alignment interrupt on local store
Date: Thu, 12 Apr 2007 20:43:38 +0200 [thread overview]
Message-ID: <200704122043.38679.arnd@arndb.de> (raw)
In-Reply-To: <20070412042337.GA21832@aepfle.de>
On Thursday 12 April 2007, Olaf Hering wrote:
> 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.
Building with -mcpu=cell won't work on 970 or g4, because that enables
a few extra instructions that were not present in the older cpus.
If you know you want to build with altivec (i.e. not run on power4 or
older), then '-m32 -mcpu=7450 -mtune=cell' or '-m64 -mcpu=970 -mtune=cell'
would be a reasonable thing to try.
Arnd <><
next prev parent reply other threads:[~2007-04-12 18:43 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 11:15 [patch 3/3] cell: prevent alignment interrupt on local store Akinobu Mita
2007-04-10 12:52 ` Segher Boessenkool
2007-04-11 3:06 ` Akinobu Mita
2007-04-10 21:22 ` Benjamin Herrenschmidt
2007-04-11 2:56 ` Akinobu Mita
2007-04-11 3:30 ` Benjamin Herrenschmidt
2007-04-11 21:03 ` Segher Boessenkool
2007-04-12 4:23 ` Olaf Hering
2007-04-12 5:26 ` Benjamin Herrenschmidt
2007-04-12 6:33 ` Olaf Hering
2007-04-12 6:38 ` Benjamin Herrenschmidt
2007-04-12 8:31 ` Gabriel Paubert
2007-04-12 8:48 ` Benjamin Herrenschmidt
2007-04-12 6:50 ` Segher Boessenkool
2007-04-12 6:57 ` [Cbe-oss-dev] " Michael Ellerman
2007-04-12 7:07 ` Segher Boessenkool
2007-04-12 18:43 ` Arnd Bergmann [this message]
2007-04-12 18:55 ` Arnd Bergmann
2007-04-12 19:57 ` Segher Boessenkool
2007-04-12 19:52 ` Segher Boessenkool
2007-04-12 13:01 ` [RFC, PATCH] selection of CPU optimization Arnd Bergmann
2007-04-12 16:45 ` Kumar Gala
2007-04-12 17:26 ` [Cbe-oss-dev] " Arnd Bergmann
2007-04-12 18:17 ` Kumar Gala
2007-04-12 19:25 ` Arnd Bergmann
2007-04-12 20:04 ` Olof Johansson
2007-04-12 20:01 ` Segher Boessenkool
2007-04-12 20:22 ` Olof Johansson
2007-04-12 20:22 ` Segher Boessenkool
2007-04-12 19:50 ` Segher Boessenkool
2007-04-13 0:10 ` Arnd Bergmann
2007-04-13 2:03 ` Olof Johansson
2007-04-13 18:43 ` Segher Boessenkool
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