Re: [Qemu-devel] Re: KQEMU code organization

[Mulyadi Santosa]

Hi..

On Fri, May 30, 2008 at 4:46 AM, Fabrice Bellard <address@hidden> wrote:
>
> Code patching seems interesting. Although I did not look in detail, it
> seems that VirtualBox use it extensively and gets very good performance
> without using hardware virtualization.

I second that. Beside being Qemu users, I am also now a loyal user of
VirtualBox. I guess that VBox can identify hot spot (repeating
instructions or TB) and tries harder and harder to optimize it. It
could be related to what I call "smart flush of translation cache"...
not entirely flushing cached TB but selectively doing so.

However, I also guess that VBox is tightly related to its kernel
module, thus without it ...it might be slower than Qemu/TCG..but I
have no hard data to support it.

Now, I wonder how transitive does sparc to x86 translation while still
maintaining speed? Does it do what linux-user does?

regards,

Mulyadi