Snapdragon 808

Questions and Answers : GPU applications : Snapdragon 808
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Mark Loukko

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Message 1786586 - Posted: 11 May 2016, 5:29:33 UTC

I've been running SETI on my Snapdragon 808 Android phone for the past week or so. It’s no speed daemon but has got me thinking about FLOPS per watt. I noticed the Snapdragon 808 has an Adreno 418 GPU built in. Does anyone know if SETI supports this GPU? My log says “No usable GPUs found”. I’m curious to see if the GPU is more efficient than my 6 cores.

Eventually I would like to calculate the difference between a farm of ARM processors running at ~4 watts each to a desktop GPU. Does anybody know if these calculations already exist?

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Mark Loukko
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Message 1786597 - Posted: 11 May 2016, 6:11:05 UTC - in response to Message 1786586.  
Last modified: 11 May 2016, 6:11:19 UTC

No, there are no OpenCL GPU applications yet for Android, not on this or any other BOINC project that I know of. Biggest trouble is of course to efficiently cool them, as calculations will generate a lot of heat. Perhaps not the wisest thing to want to do on a (small) handheld device.
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Mark Loukko

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Message 1786739 - Posted: 11 May 2016, 15:20:40 UTC - in response to Message 1786597.  

Thanks or the info Jord,

Yes, heat can be a problem. Running all 6 cores will heat the phone very quickly. 3 cores keeps it under 37c. To run 6 cores concurrently I’ve invented a rather complex cooling system / heat sink: The phone lays down on an aluminum cooking pot turned upside down. Ok, maybe not complex but its surprisingly effective. The phone says below 29c even with 6 cores running.
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Questions and Answers : GPU applications : Snapdragon 808


 
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