Re: [Qemu-devel] BeOS/Zeta eats 100% cpu time

[Christian Wiese]

André Braga wrote:

> Uh, so you meant having 100% use of CPU on the host machine?
>
>  
Sorry to be imprecise. The guest (BeOS) is more or less in an idle 
state. The host (WinXP) uses 100% cpu time.

> That could be explained by acceleration too. AFAIK, on VESA/monochrome
> mode, BeOS has to repaint the entire screen every time something
> changes (like the clock on the deskbar). This is not that heavy on the
> guest CPU, but on the emulated bus timings and         video
> bandwidth, which IMO is the biggest bottleneck of QEMU. That could be
> the reason, but I may be wrong on my assertment.
>
>  
No, I don´t think so, because even if I minimize the qEmu window and 
nothing changes in BeOS (clock changes only every minute, not second), 
the host-CPU is at 100%.

> There are drivers for several S3 models available to BeOS, but those
> are hardly all the models made by S3. The only two solutions I can
> think of is to write a new graphic card emulation layer for QEMU,
> which supports the instruction set of a specific, supported card on
> BeOS, or to write a new driver for BeOS which drives the Cirrus card
> QEMU currently emulates.
>
>  
I meant:  is it possible to activate the old S3 card emulation or was it 
never finished? Because when it is possible, I can search for a driver. 
If not, I´ll try to write a Cirrus driver, but this would take some 
time, because I´m just looking into some network-driver development.

Greetings,
Chris