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Re: [Qemu-devel] [PATCH] OSX x86_32 host support

From: Alexander Graf
Subject: Re: [Qemu-devel] [PATCH] OSX x86_32 host support
Date: Tue, 15 Jan 2008 17:32:01 +0100
User-agent: Thunderbird (X11/20070801)

Jamie Lokier wrote:
> Alexander Graf wrote:
>> I believe the 5% performance hit  
>> that goes with them is no real problem, as most people should be using  
>> x86_64 nowadays anyway.
> *Boggle*!  x86_64 is only a few years old, and cheap low-power x86_64
> laptops are relatively recent.
> -- Jamie
So you really want to do dynamic retranslation on ancient hardware? To
me emulated systems already feel slow on really recent machines, I
don't  want to go back to something even slower.
If you use kqemu there even is near no performance hit at all, which I
believe is the main use of qemu on i386 anyway. Furthermore x86_64 is
_way_ faster, as it provides a lot more registers.

I think the benefit you get from cutting the gcc3 dependency is way more
important than a major performance hit that people will usually only see
on the next release of qemu, by which time things have shifted towards
x86_64 even more.



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