From: "Laurent Desnogues" <laurent.desnogues@gmail.com>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] precompiled qemu-system-x86_64 is 32 bit instead of 64bit
Date: Thu, 21 Feb 2008 09:43:08 +0100 [thread overview]
Message-ID: <761ea48b0802210043k372471c9q9ad9caf7f4982869@mail.gmail.com> (raw)
In-Reply-To: <47BD32C8.2000705@datanet.ab.ca>
On 2/21/08, Andrew Warkentin <andreww@datanet.ab.ca> wrote:
> Why does it matter if it is 64-bit or not? Most programs at the moment
> don't benefit from being compiled 64-bit. I don't get the obsession with
> 64-bitness that most Linux and BSD people seem to have.
I have programs that run significantly faster when targetting x86_64
(Othello back-end solver, various prime sieves, interpreted simulator,
MAME [cf. http://aarongiles.com/pix/benchmarks.png])., where
significantly means >10%. I agree I can't qualify my list as "most
programs", but on the other hand I have yet to see one of my
programs running slower as x86_64 bit mode (though I guess some
programs with heavy usage of pointers could be in trouble).
Did anyone compare qemu ia32 vs x86_64?
Laurent
next prev parent reply other threads:[~2008-02-21 8:43 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-19 16:09 [Qemu-devel] precompiled qemu-system-x86_64 is 32 bit instead of 64 bit Ralf Baerwaldt
2008-02-19 20:53 ` Johannes Schindelin
2008-02-20 16:23 ` [Qemu-devel] precompiled qemu-system-x86_64 is 32 bit instead of 64bit Sergey Bychkov
2008-02-21 8:14 ` Andrew Warkentin
2008-02-21 8:17 ` Andrew Warkentin
2008-02-21 12:09 ` [Qemu-devel] precompiled qemu-system-x86_64 is 32 bit insteadof 64bit Sergey Bychkov
2008-02-21 8:43 ` Laurent Desnogues [this message]
2008-02-21 9:07 ` [Qemu-devel] precompiled qemu-system-x86_64 is 32 bit instead of 64bit Andrew Warkentin
2008-02-21 17:03 ` Ben Taylor
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