Learning Forum

[lucasissa94]

Hi guys, I'm running CFD simulations with Fluent 2022R2 and my workstation has an Intel i9 12950HX CPU. As you probably already know, Intel Alder Lake processors adopt efficiency and performance cores (12950HX has 8 e-cores and 8 p-cores). I deactivated Hyper-Threading and I tried to run a simulation using only 8 cores; the CPU has a Max Turbo Boost Frequency @ 5 GHz for the p-cores, but during the simulation it seems that the processor settles between 3.2 - 3.4 GHz (which is pretty low). So, how does the solver choose the cores for the calculation? 

Thanks.

[V.P]

Hi,

Intel Alder Lake processors, especially the HX variants designed for high-performance laptops, are subjected to thermal and power constraints to maintain stability and prevent overheating. Even though the Max Turbo Boost Frequency is advertised at 5 GHz, the processor may dynamically adjust its frequency based on factors like temperature and power consumption to stay within safe operating limits.

You could try:

• Experimenting with different core configurations to find the optimal balance between computational speed and core utilization.
• Monitoring CPU temperature and power consumption during the simulation to ensure they are within safe limits.

You can learn more about CPU parallelization and performance here:  42.9. Checking and Improving Parallel Performance (ansys.com)