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Hello, we have recently begun using Algor Simulation MES on the following machine:
- intel i7 3.2Ghz
- 12Gb RAM
- 64 bit Windows 7
When running any mesh or analysis the CPU is underutilized running at best 30%. We have turned hyperthreading off but still not improvement. Any ideas on what else could be causing a restraint?
Couple of ideas to check out. Get Process Explorer (Sysinternals) and look at what each core is doing during the mesh / analysis. I suspect you'll see one of the cores running fairly hard with dimenishing returns on each subsequent core. Also pay attention to the I/O going on. IO to the hard drive is much slower and you may just be seing latency due to read/writes occuring to the solution database.
The only time I really see my system running really hard is when I do fairly small FEA's or extremely large models that utilize the AMG solver. Everything else typically runs in the range you describe.
For products 2011 and older, the default setting is to use all cores in your system. In 2012, the default setting is to use the minimum of 8 or total number cores in your system.
For example, if there are 32 cores in your machine, 8 is 25%. So you never see a percentage more than 25% in default.
---------------------------------------------------------------------------------------------- If this response answers your concern, please mark it as "solved".
Just to clarify S.Li's post, the MES analysis uses multiple cores, at least for some of the functions within the analysis phase. The user can specify how many to use from the "Setup > Model Setup > Parameters" command, then "Advanced > Other > Number of threads/cores".
Meshing only uses 1 core at this time. We are investigating ways to use multiple cores.
John Holtz, P.E. Global Product Support Autodesk, Inc.
If not provided already, be sure to indicate the version of Inventor Nastran you are using!
Yes, I suspect that you have 4 cores. Hence during meshing and at some points during solution, only one core (25%) will be utilized. However during most matrix solutions, you should see close to 100% utilization.
I had the same issue, and my solution to visibly observe an increase of CPU throughput to around 80~100% during simulation was to disable Hyper-Threading mode in the bios when using an Intel processor. After speaking with product support, it seems that Hyper-Threading is not compatible from my understanding.
Yes, I am seeing approx 25% during meshing since there are 4 cores. I gather that this is the most I can expect. Does simulation 2012 still only use a single core for meshing?
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