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Question Simulation hang up 

Forum: Multithreading
Date: 26 Mar, 2015
From: bilal <bilal>

Hello everyone!

I am simulating doses scored in small voxels in a phantom. I run 10^9 particles in the multi-threaded mode. I have seen, quite frequently, that initially all the worker threads are processing event just fine but as the total number of events reaches 10^8 particles (or so) some threads stops working and only a couple of them are processing the events. As the number of events grow further all of them stop and the simulation hangs up eventually.

This doesn't happen all the times though.

I run the simulation on a cluster with significant enough memory (24 GB) having 4 dual core cpus (1 thread per core). So I split the job in 8 threads.

Any suggestions why this is happening.

Thanks Bilal

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1 Question: Re: Simulation hang up   (Andrea Dotti - 26 Mar, 2015)
1 Sad: Re: Simulation hang up   (bilal - 26 Mar, 2015)
(_ Warning: Re: Simulation hang up   (Andrea Dotti - 26 Mar, 2015)
(_ Feedback: Re: Simulation hang up   (bilal - 26 Mar, 2015)
(_ Idea: Re: Simulation hang up   (Andrea Dotti - 26 Mar, 2015)
(_ Note: Re: Simulation hang up   (bilal - 26 Mar, 2015)
2 None: Re: Simulation hang up   (Makoto Asai - 26 Mar, 2015)
1 Feedback: Re: Simulation hang up   (bilal - 26 Mar, 2015)
(_ None: Re: Simulation hang up   (Makoto Asai - 26 Mar, 2015)
(_ Feedback: Re: Simulation hang up   (bilal - 27 Mar, 2015)
(_ Idea: Re: Simulation hang up   (Andrea Dotti - 27 Mar, 2015)
(_ None: Re: Simulation hang up   (bilal - 31 Mar, 2015)
(_ Idea: Re: Simulation hang up   (Andrea Dotti - 31 Mar, 2015)
(_ Feedback: Re: Simulation hang up   (bilal - 31 Mar, 2015)
(_ Idea: Re: Simulation hang up   (Andrea Dotti - 31 Mar, 2015)
(_ None: Re: Simulation hang up   (bilal - 31 Mar, 2015)
3 Idea: Re: Simulation hang up   (bilal - 01 Apr, 2015)
1 Warning: Re: Simulation hang up   (Andrea Dotti - 01 Apr, 2015)
4 News: Re: Simulation hang up   (bilal - 02 Apr, 2015)
1 Feedback: Re: Simulation hang up   (Andrea Dotti - 06 Apr, 2015)
1 News: Re: Simulation hang up   (bilal - 10 Apr, 2015)
2 Angry: Re: Simulation hang up   (KADRI - 18 Apr, 2015)
... 5 Message(s)
5 More: Re: Simulation hang up   (Andrea Dotti - 18 May, 2015)
1 Feedback: Re: Simulation hang up   (bilal - 19 May, 2015)
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