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[Discuss-gnuradio] Possible bug and performance improvement in digital_f
From: |
Hendrik van Wyk |
Subject: |
[Discuss-gnuradio] Possible bug and performance improvement in digital_fll_band_edge_cc.cc |
Date: |
Fri, 22 Jun 2012 13:53:33 +0200 |
Hello all
I believe I have found a bug in digital_fll_band_edge_cc.cc: with the same input under different cpu loads I see different outputs. It seems to have something to do with how the block uses output history from the output_items parameter. Modifying it to use its own internal buffer to store output for the next iteration instead of using the output_items parameter seems to fix the problem.
Also modifying digital_fll_band_edge_cc to use SSE instructions for its dot product instead of a for loop gives a nice performance improvement.
I have attached diffs of my version of the files.
Regards
Hendrik van Wyk
digital_fll_band_edge_cc.cc.patch
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digital_fll_band_edge_cc.h.patch
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