[Qemu-devel] Re: QEMU fails with different levels of compiler optimizati

[Qemu-devel] Re: QEMU fails with different levels of compiler optimizati

[Tom Musgrove]

Have you tried to optimize for size instead?

Ie -Os (and also -fomit-frame-pointer)

It sometimes creates more speed optimal code than the other optimization 
flags.

Tom M.

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Re: [Qemu-devel] Re: QEMU fails with different levels of compiler optimizati

[André Braga]

Uh... Not yet, but you have a point: it makes it more likely that the
critical code will fit the cache. I did not enable
-fomit-frame-pointer because it makes debugging a *pain in the rear*,
and sometimes I run QEMU under GDB just to see if I can narrow the
problem down to some specific part of the code. And so far it seems
that the mingw runtime breaks something with the Windows timing
functions if I run higher levels of optimization. I'm yet to try it
under Linux.


On Wed, 28 Jul 2004 16:36:38 +0000, Tom Musgrove
<tommusgrove__@hotmail.com> wrote:
> Have you tried to optimize for size instead?
> 
> Ie -Os (and also -fomit-frame-pointer)
> 
> It sometimes creates more speed optimal code than the other optimization
> flags.
> 

--
"A year spent in artificial intelligence is enough to make one believe in God"
Alan J. Perlis