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Re: [Discuss-gnuradio] Peak Hold in FFT display causing UI problems
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From: |
Marcus D. Leech |
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Subject: |
Re: [Discuss-gnuradio] Peak Hold in FFT display causing UI problems |
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Date: |
Tue, 12 Oct 2010 18:04:35 -0400 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.12) Gecko/20100907 Fedora/3.0.7-1.fc12 Thunderbird/3.0.7 |
On 10/12/2010 05:14 PM, Eric Blossom wrote:
> Yes, I've seen this.
>
> Eric
>
>
>
Any speculation about why this is?
If you look at the code, it uses numpy.maximum(a,b) to compute the max
function over the vector. But unless numpy.maximum()
is implemented in a completely-stupid way, I can't see it being
"computey" enough to cause this issue.
I noticed that if I lowered the update rate to 2, it started working
again. Three was no good, as was four. Five, was right out.
Maybe an OpenGL weirdness on that particular platform, since my other
machine, which only has about 50% more "go" than
the Atom D-510 doesn't have this problem, even for the same GnuRadio
versions.
--
Marcus Leech
Principal Investigator
Shirleys Bay Radio Astronomy Consortium
http://www.sbrac.org