Autodesk Simulation CFD

[#1]

I have a dual 8 core workstation that I send jobs with the remote solving feature in CFD.  When I tell it to use all 16 cores it only seems to load the workstation to about 50% or half the cores.  What might I need to change so that it will use all 16 cores.

Thanks

[#2 · Accepted solution]

Are you sure it is really 16 pysical cores? Many people get confused when hyperthreading is turned on and task manager says there are 16 cores when really there are only 8 physical cores.

What are your CPU Hardware Specs?

-Royce

[#3]

I talked with our IT guys and they said it was not using hyper threading.  According to properties under my computer it is a Xeon E5-2680 @ 2.7GHz and the task manger shows 16 cores.

[#4]

If you open your resource monitor and review your CPU tab, how many CPUs are listed and how many of them indicated the 'Parked' state?

Thanks,

Royce

[#5]

8 of them are listed as parked.  So what does that mean?

-Steve

[#6 · Accepted solution]

This means that you have 8 physical cores with 8 virtual cores created with hyperthreading.

-Royce

[#7]

Thanks for the help I will let the IT Group know.

-Steve

[#8]

I have now added a 2nd 8 core cpu to this machine.  When I run a simulation now it uses ~25% of the processors.  So becasue hyperthreading is on that means it is still only using 8 of the 16 actual cores.  What am I missing now?

Thanks

[#9]

I remember from an earlier release that in a standard license the solver could use up to 4 virtual cores.

I dont remember which release this came in but it was the greatest enhancement I've seen so far.

If this is still the case its likely to be an explanation to why you dont see a performance increase