Re: [Qemu-devel] Qemu workstation

[Richard Zidlicky <rz@linux-m68k.org>]

On Mon, Apr 05, 2004 at 10:49:51PM +0100, Jamie Burns wrote:
> > I am not sure that handling multiple VMs running at the same time is
> > very useful (some architectural changes are needed in QEMU). But
> > switching easily between VM configurations seems interesting.
> 
> I think that multiple VM's is a worthy goal as long as you can minimise CPU
> usage. Having multiple VM's gives you the ability to do some very cool
> things. I use VMWARE in Windows and sometimes have both Linux and FreeBSD
> running in VM's so I can test software against all 3 OS's at once. I imagine
> it would be very useful to developers of cluster software.
> 
> I tried the Win32 port the other day, running Linux, and it sat using 100%
> of the CPU whilst doing next to nothing at a command prompt. Using VMWARE,
> and waiting at a command prompt uses very little CPU time.
> 
> Is QEMU sat in a busy loop all the time?

it is not QEMU but the hosted OS that is in the busy loop. QEMU
will have to recognise "idle loops" to fix this - this could be
really tricky.

Richard