Re: [Qemu-devel] Debian 7.8.0 SPARC64 on qemu - anything i can do to speedup the emulation?

[Aurelien Jarno <aurelien@aurel32.net>]

On 2015-07-29 08:20, Dennis Luehring wrote:
> Am 28.07.2015 um 11:54 schrieb Artyom Tarasenko:
> >>>anything i can do to speedup the emulation?
> >Maybe try the fresh tcg optimizer improvements from Aurelien:
> >https://lists.gnu.org/archive/html/qemu-devel/2015-07/msg05133.html
> 
> it don't seems to target sparc (or isn't ready) many x86/x64 only etc.
> comments

It has been tested mostly on x86-64, but it contains generic
optimizations for all targets. It should bring even more improvements on
RISC hosts, as it avoid long sequence of instructions for constant
loading.

> it seems that not many people are interested in sparc(64) emulation speed
> or on vacation :)
> or the emulation is just perfect in par with a real sun4u (i don't own one
> so i can't test)

The point is that emulation has a cost, and it's quite difficult to
to lower it and thus improve the emulation speed. For what I have been
able to see, the sparc (but also mips and sh4) targets would benefit
from MMU emulation improvements. But that's not easy to do either.

Aurelien

-- 
Aurelien Jarno                          GPG: 4096R/1DDD8C9B
aurelien@aurel32.net                 http://www.aurel32.net