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RE: [Qemu-devel] Performances on Mac OS X
From: |
Natalia Portillo |
Subject: |
RE: [Qemu-devel] Performances on Mac OS X |
Date: |
Mon, 2 Aug 2004 14:02:48 +0100 |
GCC supports Altivec, just see the help.
> -----Mensaje original-----
> De: address@hidden
> [mailto:address@hidden
> En nombre de Laurent Amon
> Enviado el: lunes, 02 de agosto de 2004 13:08
> Para: address@hidden
> Asunto: [Qemu-devel] Performances on Mac OS X
>
>
> Hello,
>
> Just to let you know that I have been benchmarking with
> linux-test/nbench on my Titanium G4/400 and that I have been
> able to sqeeze a few percents (some 5%) of performance by
> compiling with -mcpu=7400 wirth GCC 3.3. This is the only
> flag that seems useful.
> I have also tried -mpowerpc-gpopt, -mpowerpc-gfxopt,
> -falign-loops, -funroll-loops, -fnew-ra, -ftracer.
>
> When compiling with -finline-functions, the generated
> i386-softmmu/op.h is bad, and if you do not use it do compile
> dyngen, there is no improvement.
> -Os actually decreases performance and I have not been able
> to generate a profiled executable with -fprofile-arcs.
>
> Owners of PPC7450 or of G5 should try the relevant switch.
>
> I was wondering whether the implementation of qemu is tied to
> gcc or if it might be interesting to try to compile using
> IBM's compiler, which is able to generate Altivec code...
>
> Lga.
>
>
>
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