Re: [Qemu-devel] Qemu workstation

[Brad Campbell]

Filip Navara wrote:
> Brad Campbell wrote:
>
> > I guess if QEMU emulates the hlt instruction and the OS supports it 
> > then it's pretty easy.
> > I note above it said running linux, which does idle nicely when the 
> > hlt instruction is present, perhaps there is a not too difficult way 
> > for intelligent OS's. DOS is a lost cause however.
>
>
> To clarify it, it's not 'HLT' instruction (Halt processor), but the 
> 'NOP' instruction (No operation).

How does that work then?
I have some code that uses a NOP loop for accurate timing? That spins at 100% cpu usage, how does a 
NOP tell the processor to idle? HLT does.

Brad