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Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-reso
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs |
Date: |
Tue, 6 Jan 2009 18:46:07 -0800 |
User-agent: |
Mutt/1.5.18 (2008-05-17) |
On Tue, Jan 06, 2009 at 06:58:47PM -0500, Marcus D. Leech wrote:
> Let's say, for the sake of interesting discussion, that I have access to
> a beastly multi-CPU 'puter, perhaps based on the
> latest Xeon 7460 series CPUs, and a quad-socket server, giving me 24
> CPUs, and 48 threads.
>
> I'm interested in wideband, high-sensitivity, high-resolution spectroscopy.
>
> I envisage a scheme where one thread gathers an FFT-frame worth of data
> (let's say from an USRP2), and doles it out to one
> of a number of other threads that are doing FFTs on these frames of
> data. All the outputs of the FFT threads are averaged
> together to produce a result that is then time averaged.
>
> The existing FFT display schemes in Gnu Radio use a "keep-one-in-n"
> scheme for the FFTs, which means that sensitivity
> is necessarily lost, due to the spectrum being under-sampled in the
> time domain.
>
> Is there existing plumbing to be able to try this sort of thing? [On a
> smaller scale--I don't actually have such a monster server
> at my disposal at the moment!!].
>
Is this an SMP machine, or a cluster?
If SMP, it'll "just work". If it's a cluster, you'll need to figure
out how to partition separate instantiations of GR on each node.
Eric
- [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs, Marcus D. Leech, 2009/01/06
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolution FFTs,
Eric Blossom <=
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/06
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Eric Blossom, 2009/01/07
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/07
- RE: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Bob McGwier, 2009/01/07
- Re: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Marcus D. Leech, 2009/01/07
- RE: [Discuss-gnuradio] Thread scheduling for high-sensitivity, high-resolutionFFTs, Bob McGwier, 2009/01/07
- [Discuss-gnuradio] Object model for stdgui2, Paul Mathews, 2009/01/14
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