Re: [Discuss-gnuradio] usrp2_fft.grc hangs when executed

[Elvis Dowson]

Hi Marcus,

On May 16, 2011, at 2:44 AM, Marcus D. Leech wrote:

> Try doing two things:
> 
> Turn on averaging
> Turn down the FFT frame display rate from the default 30, to something like 5

Reducing the refresh rate to 5fps makes it a bit more responsive. A value of 10 
makes it un-responsive. My sample rate is 3.125M sps using a USRP2, using the 
UHD drivers.

> What type of system are you running on?  What CPU, what speed?  Multi-core or 
> single-core?

I just resurrected my old ThinkPad T42p, which is a 1.8GHz Pentium-M centrino 
processor, 2GB RAM, ATI FireGL T2 128MB graphics, gigabit ethernet and a 160GB 
hard drive, running Ubuntu 11.04 32-bit.

Running gnuradio virtualized on my iMac quad-core had issues with audio with 
older releases of gnuradio. I'll need to check with the recent release though, 
if the audio issue still persists using vmware.

I have to say, this old T42p running Ubuntu or Windows XP, is as responsive as 
any of today's multi-core i5 or i7 processors for simple daily tasks (web, 
downloads, etc) and bootup and shutdown times. The only areas it doesn't cut is 
for computationally intensive tasks. e.g. handling large datasets, generating a 
8192 bit ssh rsa key (took more than 10 mins compared to a few seconds on an 
i7), program compilation times, etc.

Elvis Dowson