Re: [Qemu-devel] Qemu + CUDA: a new possible way?

[Paul Brook <paul@codesourcery.com>]

> Recently, reading some technical articles over internet, I have
> discoverd the big potentialities of the CUDA framework in relation to
> the scientific and graphic computing that takes strong advantage from
> the most recent GPUs. Someone has used it for password recovery,
> realtime rendering, etc, with great results.

Most of these problems are what's known as embarrassingly parallel. It's 
trivial to split them up into many small independent pieces. A GPU contains 
hundreds or thousands of small, loosely coupled, low power processing units so 
is a good fit for this kind of problem.

Most of the work that qemu does is completely the opposite. Every step is 
highly dependent on the preceding steps, so you have to execute them in 
series.

If you really think you have figured our some magic way around this then your 
first step should be to make qemu work over a small number (say 8 or 16) of 
tightly coupled CPU cores. If you can't do that then you haven't got a hope in 
hell of making it work over a vast number of remote GPU cores.

Paul