CFX vs. multi processor

December 15, 2007, 12:08

Hi everybody. We have one PC with two CPU that any CPU is a dual core, how we can use all of power of this PC in CFX? In CFX10 only we can use one CPU with dual core or two CPU that any of them have one core. Does CFX11 can help me? What's your suggestion?

Thanks

December 15, 2007, 16:45

You need 2 parallel process license to utilize both cores.

December 17, 2007, 07:13

License-wise there is no difference between a multi-CPU or multi-core computer in CFX. If you want 4 partitions in a dual-CPU (with 2cdual core CPU's) you will need 4 parallel licenses.

ellevset · August 27, 2009, 08:18

Does this mean that 1 license equals one process?

Running a quad-core computer in parallell is the same as running 4 individual single-core computers?

Does anyone else have any experience in running multi-core simulatinons? Is it worth the extra cost?

Baldy · August 27, 2009, 20:15

Quote:

Originally Posted by ellevset

Does this mean that 1 license equals one process?

Running a quad-core computer in parallell is the same as running 4 individual single-core computers?

Does anyone else have any experience in running multi-core simulatinons? Is it worth the extra cost?

Holy thread digging Batman.

But yes, one partition equals one license.

ghorrocks · August 27, 2009, 20:30

Yes, a thread back from the dead.

In my experience, on a modern Intel dual core CPU you can expect a speedup of 1.4 going local parallel. On an Intel quad core somewhere around 2.5-3 is possible. The Nehalem CPUs are much better than the older CPUs.

But given the software costs far exceed the hardware costs for commercial licenses there is no point running quad core CPUs on all cores. It is more cost-efficient to run a modern X5500 series CPU with only about 2 processes per core. This is ridiculous but the current licensing strategy makes multi-core CPUs give poor price to performance.

December 15, 2007, 12:08	CFX vs. multi processor	#1
eslam Guest Posts: n/a	Hi everybody. We have one PC with two CPU that any CPU is a dual core, how we can use all of power of this PC in CFX? In CFX10 only we can use one CPU with dual core or two CPU that any of them have one core. Does CFX11 can help me? What's your suggestion? Thanks

December 15, 2007, 16:45	Re: CFX vs. multi processor	#2
HekLeR Guest Posts: n/a	You need 2 parallel process license to utilize both cores.

December 17, 2007, 07:13	Re: CFX vs. multi processor	#3
Bart Prast Guest Posts: n/a	License-wise there is no difference between a multi-CPU or multi-core computer in CFX. If you want 4 partitions in a dual-CPU (with 2cdual core CPU's) you will need 4 parallel licenses.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
problems after decomposing for running	alessio.nz	OpenFOAM	7	March 5, 2021 05:49
Problem with decomposePar tool	vinz	OpenFOAM Pre-Processing	18	January 26, 2011 03:17
Different flow pattern between OpenFOAM and CFX	AirS	OpenFOAM	0	January 12, 2010 08:08
heat generation in CFX	Ema	CFX	4	August 7, 2009 06:39
CFX 10's solutions differ from CFX 5.7's	Atit Koonsrisuk	CFX	4	July 26, 2006 12:59

August 27, 2009, 08:18		#4
ellevset New Member Peter Join Date: Apr 2009 Posts: 8 Rep Power: 17	Does this mean that 1 license equals one process? Running a quad-core computer in parallell is the same as running 4 individual single-core computers? Does anyone else have any experience in running multi-core simulatinons? Is it worth the extra cost?

August 27, 2009, 20:30		#6
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Yes, a thread back from the dead. In my experience, on a modern Intel dual core CPU you can expect a speedup of 1.4 going local parallel. On an Intel quad core somewhere around 2.5-3 is possible. The Nehalem CPUs are much better than the older CPUs. But given the software costs far exceed the hardware costs for commercial licenses there is no point running quad core CPUs on all cores. It is more cost-efficient to run a modern X5500 series CPU with only about 2 processes per core. This is ridiculous but the current licensing strategy makes multi-core CPUs give poor price to performance.