About the p-cores and e-cores and the operating system.

[Robertomcat]

Hello, good afternoon.

I currently have eight computers with the 10900K processor, and at the time I bought the volume license to be able to optimize them all.

These days I am thinking of adding a new computer with the 14th generation processor with the powerful and efficient cores.

The question is if I could make the operating system only work with the e-cores and a specific program that I want to run, only do it on the p-cores.
I think it is not going to be possible, but before abandoning the project, I had to ask you guys who are the experts.

Thank you very much.

[Jeremy Collake]

You can make it happen, but I can't speak to how performant the end result will be because many OS threads are better off on the P-cores.

Using Process Lasso, here's how to restrict your entire system to E-cores, except for processes you specifically allow to use the P-cores:

1. Open menu item "Options / Tools / System Reserved CPU Sets". Select all your P-cores, as shown in the screenshot attached. Reboot.
2. Open menu item "Options / CPU / CPU Affinities..." to set P-core affinities for the process(es) you want to use the P-cores.

[Robertomcat]

You can make it happen, but I can't speak to how performant the end result will be because many OS threads are better off on the P-cores.

Using Process Lasso, here's how to restrict your entire system to E-cores, except for processes you specifically allow to use the P-cores:

1. Open menu item "Options / Tools / System Reserved CPU Sets". Select all your P-cores, as shown in the screenshot attached. Reboot.
2. Open menu item "Options / CPU / CPU Affinities..." to set P-core affinities for the process(es) you want to use the P-cores.

Thank you very much for your help, it has been of great help to me because I did not know of its existence.

But I have another question that has come to my mind now. If I then installed any program outside the operating system, it will also be restricted to use the ecores? I say this in case I then have to apply the rule to the software so that it only uses the pcores.

[Jeremy Collake]

Yes, after setting the Reserved CPU Sets, all installed applications, in addition to the OS, will be restricted to the E-cores. Only processes that you create CPU affinity rules for will use the P-cores.

[Robertomcat]

Yes, all programs, whether installed at the time of setting the Reserved CPU Sets or later, will be restricted to the E-cores. Only processes that you create CPU affinity rules for will use the P-cores.

Ok, thanks!