I've been running ADGPS on my 2011 Mac mini and have been able to try it on other systems. Here's a non-scientific report of how the perform:
These are times based on an approximately 1 hour recording from Studio 1 from an AFE822x SDR at 75 ksps. My time estimates are watching the stats and estimating its speed. Its reasonably close, but plenty of room for additional accuracy. If there is interest, I can do a more thorough analysis of the rates of decodes.
mid-2011 Mac mini (Macmini5,2)
1.0 kHz channels: 20 minutes - 3x realtime
0.5 kHz channels: 40 minutes - 1.5x realtime
Old Windows 7 PC (gaming system built Oct 2009).
Intel E6850 CPU with 8 GB RAM
1.0 kHz channels: 5x realtime
0.5 kHz channles: Untested (as I was wasting a lot of time trying to get the stupid thing updating since August & then getting s/w running. Reminded me what a PITA .... <mumble> <mumble>
)
New Windows 10 PC (my current gaming PC built last fall)
Intel i5-6600k @ 3.50 GHz (not currently overclocked) & 16 GB RAM.
1.0 kHz channels: 12x realtime
0.5 kHz channels: 7.5x realtime <--- this surprised me. I was expecting 6x, not 7.5x. (7.5 being defined as watching the counter updating every second and watching the differences in jumps, sometimes 8 seconds, sometimes 7 seconds. It is definitely faster than 6x realtime).
Would prefer to use my mini, as remote access is much easier (and safer), but the Win10 PC is really doing relatively well. I fed it a bunch of nightly recordings from Mar 13 - Mar 19 and its grinding through all of them on 1.0 & 0.5 kHz channels at pretty good speed. The four cores are nearly maxed. I did try some gaming, however, its fairly unusable while ADGPS is doing its thing. lol.
I have had the old gaming PC off since last Aug when I built the new one. This weekend, I brought that back online and its now doing the daily recordings from the AFE822x (the win 10 PC used to do that, but what a waste). I'll use the Mac mini to do the daily decodes of the whole day, and will use the win 10 PC to churn through the night-time recordings looking for 0.5 kHz stations (which is the genesis of my FR for selecting 0.5, 1.0, and 0.5+1.0 kHz channels).
Also had been using the Perseus for recording. It has a 125 ksps minimum sample rate. It creates files a little larger than 2x the files that Studio 1 is creating with the AFE822x at 75 ksps. The speed on the Mac mini is the same for decodes. But copying the 2.68 GB Perseus files obviously takes longer than the 1.04 GB Studio 1 AFE822x files and uses far less disk space.
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