|
From: | Tarun Tiwari |
Subject: | Re: [Discuss-gnuradio] saturation with multi_fft.py |
Date: | Thu, 11 Oct 2007 14:11:38 -0500 |
address@hidden wrote:
> I'm sure you are right about the gui taking the majority of the cycles,
> but it's the real-time feedback that makes gnuradio so attractive.
> Ideally one would beable to switch them on and off as needed during
> operation of the program, which it is my understanding will be possible
> with the implementation of mblocks.
>
> As things stand now, is there a "refresh rate" control that I can
> modify, so that the scope sinks use less cycles?
Yes, you can set the following parameters.
sink param default less cycles Function
oscope frame_decim 1 >1 keep one block in every "frame_decim"
fft fft_rate 15.0 <15.0 refresh rate of fft_display
so for less GUI cycles set frame_decim to 10 or even 100
set fft_rate to 5.0 or even 1.0
I wished that fft_rate was set to 5.0 default because allmost allways 15.0 is too much a load on my machines.
Greetings,
Martin
> thanks,
> eric
>
> On Wed, 10 Oct 2007, Eric Blossom wrote:
>
>> On Wed, Oct 10, 2007 at 06:07:04PM -0400, address@hidden wrote:
>>> Ok, that works in principle, but I'm finding that I cannot sustain the
>>> same data rate as before on a fast dual core machine.
>>>
>>> I'm acquiring all 4 channels, and I'm doing both low-pass and high-pass
>>> filtering on all of them. I am also displaying 5 sinks
>>> simultaneously; 1
>>> fft and 4 scopes.
>>
>> You'll most likely find that the bulk of your cycles are spent in the
>> gui. Try disabling it.
>>
>>> So, in the long term it would help to have this sorted out in the
>>> fpga if
>>> that's possible; is that impossible as things stand now, or is there
>>> sufficient space in the 4rx no hb fpga?
>>
>> IIRC, the std_4rx_0tx.rbf configuration uses about 86% of the FPGA.
>>
>> Eric
>>
>
>
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