Re: [Discuss-gnuradio] Serious performance regression in Gnu Radio recent

[Marcus D. Leech]

On 02/05/2012 05:19 PM, Tom Rondeau wrote:
> It sounds like we need someone to work on a strip-chart functionality 
> for the qtgui sinks. They do everything in C++ land, so we could 
> optimize there more easily.
>
> In other news, glad you found the problem. What do you want to do 
> about it in the meantime, since it's your code, and I think you're the 
> primary user of the oscope under these conditions.
>
> Tom
I've backed OUTPUT_RECORD_SIZE down to 4096 on my system here, and it 
has acceptable performance for me.  In the particular
  application at hand, there are six channels being displayed in a 
strip-chart, and the chart is updated at about 4Hz (I think, I'll have to
  check in the flow-graph).  Looking at the plotter code in 
scope_window.py there's a lot of computational goo going on in Python land,
  including iterating over the input message buffer*number of 
channels.  It's pretty ugly down there :-(



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