CFX solver configuration for multi core processor

sunilpatil · December 26, 2012, 10:18

Hello everyone,
I have intel core i7-2630QM CPU @2.00GHz Processor with 8GB of RAM for running local parallel run what is the maximum number can i set for partitions

thank you

Sixkillers · December 26, 2012, 10:27

I would say 8, because your processor has 8 threads (http://ark.intel.com/products/52219/...up-to-2_90-GHz)

ghorrocks · December 27, 2012, 05:48

How many parallel licenses do you have? That be the actual limit you have.

Assuming you have lots of parallel licenses - I recommend you do a benchmark study against number of CPUs. You will probably find that beyond 4 processes the speedup factor drops right off, and the 7th and 8th process may well make the simulation slower than 6 processes. These are just my guesses, so do the benchmark on your machine to find out for sure.

david.pasquale · December 27, 2012, 06:14

I totally do not agree..the maximum number of partitions has to be equal to the max number of cores of your machine...intel hyper threading is only a virtual stuff made for low load applications. In fact cannot help for very intensive calculations like cfd applications

ghorrocks · December 27, 2012, 06:23

I did not look up the specs of that CPU - David is correct - if it is a 4 core CPU then the 4 virtual cores from hyperthreading will not help at all and should not be used. But if you do a benchmark sweep of different numbers of cores like I recommended you would find that out for yourself

December 26, 2012, 10:18	CFX solver configuration for multi core processor	#1
sunilpatil Senior Member sunil Join Date: Jul 2012 Location: Bangalore Posts: 179 Rep Power: 13	Hello everyone, I have intel core i7-2630QM CPU @2.00GHz Processor with 8GB of RAM for running local parallel run what is the maximum number can i set for partitions thank you

December 27, 2012, 06:14		#4
david.pasquale New Member David Join Date: Dec 2012 Posts: 8 Rep Power: 13	I totally do not agree..the maximum number of partitions has to be equal to the max number of cores of your machine...intel hyper threading is only a virtual stuff made for low load applications. In fact cannot help for very intensive calculations like cfd applications Whitebear likes this.

December 27, 2012, 06:23		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	I did not look up the specs of that CPU - David is correct - if it is a 4 core CPU then the 4 virtual cores from hyperthreading will not help at all and should not be used. But if you do a benchmark sweep of different numbers of cores like I recommended you would find that out for yourself Whitebear likes this.

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December 26, 2012, 10:27		#2
Sixkillers Member Join Date: Nov 2011 Location: Czech Republic Posts: 97 Rep Power: 14	I would say 8, because your processor has 8 threads (http://ark.intel.com/products/52219/...up-to-2_90-GHz)

December 27, 2012, 05:48		#3
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,703 Rep Power: 143	How many parallel licenses do you have? That be the actual limit you have. Assuming you have lots of parallel licenses - I recommend you do a benchmark study against number of CPUs. You will probably find that beyond 4 processes the speedup factor drops right off, and the 7th and 8th process may well make the simulation slower than 6 processes. These are just my guesses, so do the benchmark on your machine to find out for sure.