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Thread 'Why no Tasks?'

Thread 'Why no Tasks?'

Message boards : Number crunching : Why no Tasks?
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Paulie

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Message 63945 - Posted: 5 May 2021, 21:16:01 UTC

Been months, I'm sure my Processor and GPU can handle them.
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Les Bayliss
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Message 63946 - Posted: 5 May 2021, 21:32:45 UTC - in response to Message 63945.  

This project has never had GPU work.
And all of the research groups that were supplying Windows work "disappeared" a year ago, for reasons unknown.

So the project is currently Linux only.
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Jean-David Beyer

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Message 63947 - Posted: 6 May 2021, 11:24:02 UTC - in response to Message 63945.  
Last modified: 6 May 2021, 11:25:46 UTC

Been months, I'm sure my Processor and GPU can handle them.


I have been running lots of tasks, mostly N216 tasks. Most usually 4 at a time (my current limit). I run Linux.

  PID    PPID USER      PR  NI S    RES    SHR  %MEM  %CPU  P     TIME+ COMMAND                                                            
  18762   18655 boinc     39  19 R   1.3g  19704   2.1  99.3  2   4660:06 /var/lib/boinc/projects/climateprediction.net/hadam4_um_8.52_i686+ 
   5326    5314 boinc     39  19 R   1.3g  19828   2.1  99.2 15   5438:16 /var/lib/boinc/projects/climateprediction.net/hadam4_um_8.52_i686+ 
 100855  100848 boinc     39  19 R   1.3g  19752   2.1  99.3  6   2278:47 /var/lib/boinc/projects/climateprediction.net/hadam4_um_8.52_i686+ 
 173508  173494 boinc     39  19 R   1.3g  19880   2.1  99.4  5 928:42.72 /var/lib/boinc/projects/climateprediction.net/hadam4_um_8.52_i686+ 

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ProfileDave Jackson
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Message 63948 - Posted: 6 May 2021, 14:57:10 UTC

Been months, I'm sure my Processor and GPU can handle them.


With respect to GPU processing, the nature of what a GPU has to do means that to produce good frame rates for games or high definition video, it needs to be able to do a lot of things at once. Climate modelling (at least the way it is done with most current models) is a sequential process with each calculation being dependent on the previous one. This means that the processing power of even a fast GPU would be largely wasted as it would not be able to use more than a fraction of its many threads. Even if the project had programmers well enough versed in GPU programming to port the applications, this means they would still be slow compared to CPUs doing the same job.

I am not saying that climate modelling will never make use of GPU cards but I certainly don't see it happening in a hurry. Of course that doesn't mean some whizz won't come along and prove me wrong in the next couple of years but I don't know of anyone working on it at the moment. And to get work, the only reliable answer for this project at the moment is to run Linux either directly or through some sort of virualisation either VB or WSL etc.
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Message boards : Number crunching : Why no Tasks?

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