Raspberry Pi 2

Message boards : Number crunching : Raspberry Pi 2
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Richard Haselgrove Project Donor
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Message 1644130 - Posted: 19 Feb 2015, 17:01:47 UTC - in response to Message 1644121.  

There's plenty of discussion at Einstein.

Parallella, Raspberry Pi, FPGA & All That Stuff

Yes, they've got the P1 2 running with the NEON accelerator and a bespoke wisdom for FFTW optimisation.
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Message 1644229 - Posted: 19 Feb 2015, 20:21:17 UTC - in response to Message 1644121.  

I've been compiling Setiathome applications for my Parallellas, Pi Model B, and Pi 2 Model B,
the applications that work date to before the Android applications, and because of that aren't fast compared to the Android Seti apps, or as comparable as the Einstein Android/Linux BRP apps,
full length Wu's take two and a half to three days, compared to about a day and a half for a couple of my Android hosts, part of that is the increased clock speed on my Android hosts,
and part of it is the generic code the Pi's and Parallellas use.

While you can compile apps from the current code base, with a compilation workaround, the apps that i've compiled don't produce the correct output, that's the same with apps from the Debian repository code base too,
Part of the problem is that the code for the Arm apps is for the soft-float calling convention, while the Parallella and Pi's OS use the hard-float calling convention.

Claggy
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Message 1644266 - Posted: 19 Feb 2015, 22:30:21 UTC

The Raspberry Pi B apparently has "single precision performance of 0.065 GFLOPS" under Raspbian & the Raspberry Pi 2 is said to have "6x more processing power". I'm not sure if the "6x" is figured using all 4 cores or just 1, but 6x would put it at 0.39 GFLOPS of CPU processing power. Which is just a bit slower than a Pentium M @ 1.7GHz, but using a lot less power.
The GPU is listed at 24 GFLOPS & it looks to be the same GPU as the previous generation.
SETI@home classic workunits: 93,865 CPU time: 863,447 hours
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Message boards : Number crunching : Raspberry Pi 2


 
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