Re: [Discuss-gnuradio] saturation with multi_fft.py

[Jeff Brower]

Eric-

> On Mon, Oct 08, 2007 at 07:41:06PM -0500, Jeff Brower wrote:
> > Eric-
> >
> > > Ok, I installed the latest Quartus II ver. 7.2 software onto a virtualized
> > > WinXP guest hosted by a Linux x86_64 system running kvm/qemu.  I
> > > downloaded a recent revision of gnuradio (revision 6595) onto the host.
> >
> > This should work Ok, but let me comment that based on personal experience 
> > FPGA tool
> > software is some of the most fickle, easy-to-crash (/ hang up / produce 
> > inconsistent
> > results / etc) software out there.  If there is any little small thing 
> > wrong with the
> > virtualization, you could get an incorrect result, and it might be very 
> > hard to pin
> > down.  I would suggest to install Quartus on a WinXP machine, build USRP 
> > logic to be
> > sure it matches the defined results down to the last detail, and then 
> > compare that
> > with the Linux-hosted virtualization.
> 
> I don't think that's the problem.
> I run Quartus on a Win2K guest on VMware on Linux.

My comments are general and I also doubt that it's the problem in this case.  
If you
get identical results to a native WinXP run, then certainly that particular
virtualization config is not a problem.  But it should be tested.  To compound
things, it's not like the FPGA vendors have good Q&A -- lots of unstable 
releases.

-Jeff