[Qemu-devel] qemu optimizations for x86

[Qemu-devel] qemu optimizations for x86

[Joseph Miller]

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I have been using an compiler-optimized version of qemu for several weeks now 
on an x86 with much success.  Qemu has not crashed one single time and I have 
seen a noticeable performance increase.  What I have done is added 
"-finline-functions -funroll-loops" to the CFLAGS, but I made sure that it 
would not be added to OP_CFLAGS.  This ensures that every file is compiled 
with the optimizations *except* op.c, which should not have these flags.  If 
op.c is compiled with these flags, crashes will be too often to make it 
usable.  So the actual processor emulation may not be optimized any more, but 
all of the peripherals and hardware emulators will be.  Simply install the 
patch and then configure with '--enable-x86-optimize'.

- -Joseph
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Re: [Qemu-devel] qemu optimizations for x86

[Paul Brook]

On Friday 30 December 2005 21:45, Joseph Miller wrote:
> I have been using an compiler-optimized version of qemu for several weeks
> now on an x86 with much success.  Qemu has not crashed one single time and
> I have seen a noticeable performance increase.

Do you have any actual performance numbers?

Why are these x86 specific?

Paul