Re: [Qemu-devel] Qemu workstation

[Jamie Burns]

Isnt there an instruction that gets sent when the OS is idle? To keep
processors cool etc?

VMWare describes some of this in:

http://www.vmware.com/support/kb/enduser/std_adp.php?p_faqid=1077

:o)


----- Original Message ----- 
From: "Richard Zidlicky" <address@hidden>
To: <address@hidden>
Sent: Tuesday, April 06, 2004 1:17 PM
Subject: Re: [Qemu-devel] Qemu workstation


> 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
>
>
>
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