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Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X
From: |
Jamie Lokier |
Subject: |
Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X |
Date: |
Tue, 27 Jan 2009 00:42:32 +0000 |
User-agent: |
Mutt/1.5.13 (2006-08-11) |
Paul Brook wrote:
> > Out of curiousity, what are the benefits of using 64-bit apps in OS X?
>
> My guess is that same as most other x86 targets: The i386 legacy
> mode is crippled by lack of registers, modern x86 hardware has a big
> fat wide memory bus, and noone's bothered implementing an ILP32
> 64-bit API[1], so 64-bit apps give measurably better overall
> performance.
Except they use more memory and memory bandwidth (arguably filling
nearly half of it with zeros most of the time :-) so worse overall
performance in some cases.
-- Jamie
- [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Alexander Graf, 2009/01/24
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Anthony Liguori, 2009/01/26
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Paul Brook, 2009/01/26
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X,
Jamie Lokier <=
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Paul Brook, 2009/01/26
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Anthony Liguori, 2009/01/26
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Alexander Graf, 2009/01/27
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Jamie Lokier, 2009/01/27
- Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, Laurent Desnogues, 2009/01/27
Re: [Qemu-devel] [PATCH] Enabled building of x86_64 code on Mac OS X, C . W . Betts, 2009/01/26