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None GeantMT crashed after 14 threads 

Forum: Multithreading
Date: 09 Aug, 2012
From: Dongwook Jang <Dongwook Jang>

Hi,

I've tested Geant4MT (geant4_mt_proto.9.4.p01) on the machine with the following specification.

AMD Opteron 6128, 2GHz with 4X8 cores without HyperThreads.

I just ran an example, ParA01 without modification.
Here is the CPU time summary:

# of threads : CPU time [s]
1    : 101.6
2    : 53.5
4    : 27.2
8    : 16.6
12   : 12.5
13   : 12.0
14   : 12.5

15 threads or higher jobs were crashed.
So is Geant4MT capable of multithreading only upto 14?
Also by comparing 8 and 12, they don't seem to be scaled.
I just want to make sure what I observed is expected.

Thank you.
Dongwook Jang

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1 None: Re: GeantMT crashed after 14 threads   (Makoto Asai - 09 Aug, 2012)
(_ None: Re: GeantMT crashed after 14 threads   (Dongwook Jang - 27 Aug, 2012)
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