Re: [Discuss-gnuradio] uhd_fft and rx_ascii_art_dft die after 30 seconds

[Marcus D. Leech]

On 30/10/11 11:27 PM, Clark Pope wrote:
>
> I am running ubuntu 10.04 in vmware and connecting to an n210 via a gigabit 
> ethernet USB dongle. When I run either uhd_fft.py or rx_ascii_art_dft all 
> works fine for exactly 30 seconds and then the data display stops updating. 
> If I rerun the app it works again for 30 seconds and stops. 
>  
> In wireshark the data looks good coming from 192.168.10.2 to port 49156 until 
> it hangs then pc sends packet on 35433 and usrp reponds on 49152 and it just 
> goes back and forth forever. 
>  
> there's plenty of disk space and memory and no messages in dmesg. doesn't 
> seem to matter what sample rate I choose. I assume it has something to do 
> with vmware but just guessing. Any ideas? Thanks                              
>       
> _______________________________________________
>
>   
I would suspect some combination of VMWare and your USB Ethernet
dongle.  USB-2.0 operates at
  480Msps *maximum*, which is just shy of *half* of the required Gigabit
rates supported by
  *real* Gigabit ethernet cards.


-- 
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org