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Re: [Discuss-gnuradio] Making a transparent block for throughput measure


From: Tommy Tracy II
Subject: Re: [Discuss-gnuradio] Making a transparent block for throughput measurement
Date: Wed, 12 Dec 2012 10:53:04 -0500

        Thank you. It worked! Unfortunately, it slowed down my flowgraph from 
~6 seconds to 145 seconds. 

The only difference between the two programs is in the connections:
----------
        self.connect((self.gr_wavfile_source_0, 0), (emptyBlock0,0))
        self.connect((emptyBlock0,0), (self.band_pass_filter_0, 0))
----------
which was originally:
----------
        self.connect((self.gr_wavfile_source_0,0), (self.band_pass_filter_0,0))
----------
Below is the emptyBlock code:
----------
class emptyBlock(gr.block):
    def __init__(self, args):
        gr.block.__init__(self, name="empty", in_sig=[float32], 
out_sig=[float32])

    def work(self, input_items, output_items):
        output_items[0][:]=input_items[0]
        return len(output_items[0])
----------

Thanks again!
Tom Tracy II
      UVA

On Dec 12, 2012, at 2:54 AM, Martin Braun (CEL) <address@hidden> wrote:

> On Tue, Dec 11, 2012 at 07:00:42PM -0500, Tommy Tracy II wrote:
>> I'm trying to measure the throughput of my flow graph. In order to 
>> accomplish this, I'm creating a transparent float block and then measuring 
>> the btyes/second that is going through the block. Unfortunately, my block is 
>> not acting transparently. I'm getting strange distortion when doing AM 
>> demodulation.
> 
> Try without self.consume(); grextras using auto_consuming in sync
> blocks, although I don't know what happens if you do call it (my
> hypothesis is that if I'm right, your audio should sound choppy).
> 
> MB
> 
> PS: Or is this the omninous Bugsquatch people have been talking about?
> 
> 
>> 
>> Below is my grextras code:
>>      Is there something that I am missing?
>> 
>> ----------
>> class emptyBlock(gr.block):
>>    def __init__(self, args):
>>        gr.block.__init__(self, name="empty", in_sig=[float32], 
>> out_sig=[float32])
>> 
>>    def work(self, input_items, output_items):
>>        in0 = input_items[0]
>>        out = output_items[0]
>>        out[:]=in0
>>        self.consume(0, len(in0))
>>        return len(out)
>> ----------
>> 
>> Sincerely,
>> Tom Tracy II
>>    UVA
>> 
>> 
>> _______________________________________________
>> Discuss-gnuradio mailing list
>> address@hidden
>> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
> 
> -- 
> Karlsruhe Institute of Technology (KIT)
> Communications Engineering Lab (CEL)
> 
> Dipl.-Ing. Martin Braun
> Research Associate
> 
> Kaiserstra├če 12
> Building 05.01
> 76131 Karlsruhe
> 
> Phone: +49 721 608-43790
> Fax: +49 721 608-46071
> www.cel.kit.edu
> 
> KIT -- University of the State of Baden-W├╝rttemberg and
> National Laboratory of the Helmholtz Association
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> https://lists.gnu.org/mailman/listinfo/discuss-gnuradio




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