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Satellite PC Card Receivers, Internet by Satellite
Blindscan on linux with tbs cards
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<blockquote data-quote="deeptho" data-source="post: 1133117" data-attributes="member: 215446"><p>So after some more testing and fixing bugs: running 2 spectral scans (two satellites) in parallel</p><p>takes 42 seconds. If run serially it would two times 27 or 54 seconds. That is a speedup of 50%</p><p>due to parallelisation. This speedup is only possible because of the hugely reduced number of i2c</p><p>reads. It is still a pity to have a card with 4 fft engines that can run in parallel, but with no way of </p><p>quickly reading the data. Of course the fft engines can still be used in parallel for blindscanning, </p><p>which is what they were added for.</p><p></p><p>One more thing to try could be to overclock the i2c bus and see what happens. I think errors will</p><p>start to appear.</p><p></p><p>The current status is that for evey fft 28 ms is needed to compute it (actually it is many ffts that are </p><p>computed and then added) and 50ms is needed to read the data. So reducing the 50ms would be </p><p>the goal.</p></blockquote><p></p>
[QUOTE="deeptho, post: 1133117, member: 215446"] So after some more testing and fixing bugs: running 2 spectral scans (two satellites) in parallel takes 42 seconds. If run serially it would two times 27 or 54 seconds. That is a speedup of 50% due to parallelisation. This speedup is only possible because of the hugely reduced number of i2c reads. It is still a pity to have a card with 4 fft engines that can run in parallel, but with no way of quickly reading the data. Of course the fft engines can still be used in parallel for blindscanning, which is what they were added for. One more thing to try could be to overclock the i2c bus and see what happens. I think errors will start to appear. The current status is that for evey fft 28 ms is needed to compute it (actually it is many ffts that are computed and then added) and 50ms is needed to read the data. So reducing the 50ms would be the goal. [/QUOTE]
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Satellite PC Card Receivers, Internet by Satellite
Blindscan on linux with tbs cards
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