From: Adrian Bunk <bunk@kernel.org>
To: Michael Lothian <mike@fireburn.co.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Possibility of adding -march=native to x86
Date: Thu, 25 Oct 2007 22:20:31 +0200 [thread overview]
Message-ID: <20071025202031.GU30533@stusta.de> (raw)
In-Reply-To: <fc94aae90710251312w2eba46e8h5d4f8715ad0e91b6@mail.gmail.com>
On Thu, Oct 25, 2007 at 09:12:45PM +0100, Michael Lothian wrote:
> > The MPENTIUM4 option does not only set -march=pentium4, it also enables
> > several other options in arch/i386/Kconfig.cpu resulting in better
> > performance.
>
> How about an autodetect to set the right options here too using cpuid?
>
> With a warning of course that the code produced will be specifically
> for the native cpu that it's compiled on.
If you don't know or can figure out yourself the CPU you have, you'd
better not compile your own kernel...
cu
Adrian
--
"Is there not promise of rain?" Ling Tan asked suddenly out
of the darkness. There had been need of rain for many days.
"Only a promise," Lao Er said.
Pearl S. Buck - Dragon Seed
next prev parent reply other threads:[~2007-10-25 20:20 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <0EC33A59AA72084CA28B83816B40929F02682BB3@REEDXCLSXM01V03.rbsres01.net>
2007-10-25 18:33 ` Possibility of adding -march=native to x86 Michael Lothian
2007-10-25 18:50 ` Adrian Bunk
2007-10-25 19:09 ` Michael Lothian
2007-10-25 19:17 ` Adrian Bunk
2007-10-25 19:32 ` Michael Lothian
2007-10-25 19:50 ` Adrian Bunk
2007-10-25 20:12 ` Michael Lothian
2007-10-25 20:20 ` Adrian Bunk [this message]
2007-10-25 20:20 ` Arjan van de Ven
2007-10-26 10:41 ` Pádraig Brady
2007-10-26 11:45 ` Adrian Bunk
2007-10-25 20:40 ` Gabriel C
2007-10-25 21:30 ` Michael Lothian
2007-10-25 21:46 ` Adrian Bunk
2007-10-25 22:04 ` H. Peter Anvin
2007-10-25 22:42 ` Michael Lothian
2007-10-25 22:58 ` Adrian Bunk
[not found] ` <fc94aae90710251518l1cc129eahf570177e5b516197@mail.gmail.com>
[not found] ` <20071025222826.GY30533@stusta.de>
2007-10-25 22:58 ` Michael Lothian
2007-10-26 9:16 ` Thomas Gleixner
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