CFD not recognizing all cores available on machine
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I am currently using the student version of CFD 2019, and assessing whether or not I'll be able to run simulation on an Amazon AWS instance, as I certainly don't have the hardware to get any simulations done in a reasonable amount of time on my own hardware. I went ahead and allocated a small instance (this may be the cause of my issues; the instance initially only had a single core) and installed Autodesk CFD. After getting CFD installed, I changed the instance type to c5.18xlarge (72 cores, 144GB memory). After doing this, CFD only detected 2 cores on 1 processor. This didn't seem right, so I went ahead and set the machine to 72 cores in the Solver Computers UI, which didn't change anything. I went ahead and set the machine to 2 processors, 72 cores in SystemInfo.xml. CFD was now showing that I had 24 cores on 2 processors, but this still seemed a little off, so I went ahead and reinstalled CFD. After the reinstall, CFD only detects 18 cores on 2 processors.
The instance has two Xeon 8124M processors. I know that CFD is not able to use Intel Hyperthreading threads, but there are 36 physical cores between the two processors, so CFD should be detecting at least those 36 physical cores. Is there any reason that CFD wouldn't be able to detect all available cores? Is it possible that CFD having been initially installed when the instance only had 1 core available caused an issue, and that residual registry keys/files are preventing it from detecting all cores? As a final note, the instance is running Windows Server 2019; do I have to switch over to Server 2016, or is 2019 OK?
Being able to utilize this hardware would be huge for me, so any help would be appreciated.
Thank you for your time,
Thomas Meier
