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-   -   CFX vs. multi processor (https://www.cfd-online.com/Forums/cfx/24928-cfx-vs-multi-processor.html)

eslam December 15, 2007 11:08

CFX vs. multi processor
 
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


HekLeR December 15, 2007 15:45

Re: CFX vs. multi processor
 
You need 2 parallel process license to utilize both cores.

Bart Prast December 17, 2007 06:13

Re: CFX vs. multi processor
 
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 07:18

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 19:15

Quote:

Originally Posted by ellevset (Post 227653)
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 19:30

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.


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