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April 24, 2008, 03:51
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Hello World.
I'm woundering
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Senior Member
Sebastian Gatzka
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729
Rep Power: 20  |
Hello World.
I'm woundering if my machine can do parallel processing. Is there a list with supportet processors? I'm using a Intel Core2Duo T7500 @ 2.2 GHz. Greetings.
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Schrödingers wife: "What did you do to the cat? It's half dead!" |
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April 24, 2008, 04:07
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Your machine has two cores, so
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Member
Patricio Bohorquez
Join Date: Mar 2009
Location: Jaén, Spain
Posts: 95
Rep Power: 17 |
Your machine has two cores, so YES you can. Decompose your domain in two subdomains with the utility decomposePar, and run the parallel case as indicated in the User guide, with np being 2.
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April 24, 2008, 04:13
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Unfortunately I'm running my l
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Senior Member
Sebastian Gatzka
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729
Rep Power: 20 |
Unfortunately I'm running my linux-system in a virtual environment on a Windows machine.
I suppose the virtualbox is not supporting multiple cores. When I do the steps to for parallel running and check the cpu workload with 'top' I have two solvers running with each nearly 50 % ... That doesn't look like real parallel running ...
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Schrödingers wife: "What did you do to the cat? It's half dead!" |
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April 24, 2008, 04:35
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On the other hand, if I run th
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Senior Member
Sebastian Gatzka
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729
Rep Power: 20 |
On the other hand, if I run the single solver, I get 100% workload in linux and 100% workload on EACH core in windows ...
Maybe thats all I can sqeeze out of my machine ...
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Schrödingers wife: "What did you do to the cat? It's half dead!" |
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April 24, 2008, 05:59
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You should install Linux! http
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Senior Member
Billy
Join Date: Mar 2009
Posts: 167
Rep Power: 17 |
You should install Linux!
 I suggest simulate a simple case like lid-driven cavity with 80x80 cells or so with 1 and 2 processes and compare the computation time. |
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April 24, 2008, 12:54
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We tested damBreak and found O
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Guest
Posts: n/a
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We tested damBreak and found OpenFOAM to be highly parallel. As # cores increase, the wall clock time greatly decreases - Check out also the InfiniBand topics under http://www.cfd-online.com/OpenFOAM_D...tml?1173649250
Most solvers have cases for each # procs (nproc2, nproc4...etc) and for cluster cofiguration, you just have to specify a hostfile with the mpirun command. Hope this helps! |
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April 27, 2008, 10:14
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Well I have tested my dam brea
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Senior Member
Sebastian Gatzka
Join Date: Mar 2009
Location: Frankfurt, Germany
Posts: 729
Rep Power: 20 |
Well I have tested my dam break problem.
Running in parallel it's just half the time. Obviously the virtual environment does support miltiple cores.
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