Not using all cores available

- June 5, 2023 at 9:54 pm
  
  barrett0
  Subscriber
  
  HPC isn't using all 24 cores available, just 16 even though 24 are specified.
  Our license includes:
  Ansys Academic Research Mechanical and CFD (25 tasks): 2 task(s) Lease expiring 31-Dec-2023 Customer
  and has this increment:
  
  INCREMENT anshpc ansyslmd 9999.9999 31-dec-2023 600 \
  
  Can someone explain if this means there are limitations?
- June 6, 2023 at 10:47 am
  
  Aniket
  Forum Moderator
  
  MAPDL Solver can only use physical cores on your machine, it can not use logical processors that you see in task manager. I would recommend turning virtualization off and using about 14 cores on this machine, leaving a couple of cores for system-related processes.
  -Aniket
  How to access Ansys help links
  Guidelines for Posting on Ansys Learning Forum
- June 6, 2023 at 4:23 pm
  
  barrett0
  Subscriber
  
  Thanks, I will pass that along. Would you be able to clarify what our license includes in regards to HPC?
  - June 8, 2023 at 2:01 pm
    
    Aniket
    Forum Moderator
    
    Assuming you are using the research license, it supports 16 cores (12 fixed + 4 floating HPC). From our internal database, I see that you have 25 tasks for Mechanical and CFD and 25 for Electronics products, each task has 12 fixed and 4 floating HPC licenses. So you have 4*25*2=200 floating HPC cores available. Given that you have a sufficiently powerful machine with 212 or more physical cores, you should be able to use 200 floating HPC licenses and 12 fixed ones for that task. Provided all tasks are on a single server.
    -Aniket
    How to access Ansys help links
    Guidelines for Posting on Ansys Learning Forum