beginner's questions about fluent paralle processing

Renold · May 17, 2009, 19:22

My computer has a core i7 920 (quad core) cpu, 12gb memory, and vista 64bit. Now I am using fluent 6.3 64bit to perform paralle computing. The grid info is as below:
Level Cells Faces Nodes Partitions
0 57756 121860 62462 1

The computation time for serial computing is about 9 h. The wall-clock time for 2-processer paralle computing is about 5.5 h. If I use more than 2 processors, the wall-clock time does not change. I am wondering if it is because the nodes are two few.

Plus, I noticed that when fluent was running the page file usage increased. Can I increase the usage of memory and reduce that of page files? I think that would make the computation faster.

Another question is that it is better to turn on SMT or not?

Thanks in advance.

-mAx- · May 18, 2009, 01:53

Your mesh is too small.
Try with a mesh with 1 million cells you will see the difference

May 17, 2009, 19:22	beginner's questions about fluent paralle processing	#1
Renold New Member Join Date: Apr 2009 Posts: 24 Rep Power: 17	My computer has a core i7 920 (quad core) cpu, 12gb memory, and vista 64bit. Now I am using fluent 6.3 64bit to perform paralle computing. The grid info is as below: Level Cells Faces Nodes Partitions 0 57756 121860 62462 1 The computation time for serial computing is about 9 h. The wall-clock time for 2-processer paralle computing is about 5.5 h. If I use more than 2 processors, the wall-clock time does not change. I am wondering if it is because the nodes are two few. Plus, I noticed that when fluent was running the page file usage increased. Can I increase the usage of memory and reduce that of page files? I think that would make the computation faster. Another question is that it is better to turn on SMT or not? Thanks in advance.

May 18, 2009, 01:53		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	Your mesh is too small. Try with a mesh with 1 million cells you will see the difference __________________ In memory of my friend Hervé: CFD engineer & freerider

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