Add a chapter about scikit-learn-intelex

[Vika-F]

Add information about sklearnex configurations that can provide better performance.

CC @napetrov @david-cortes-intel @avolkov-intel @Alexandr-Solovev

[david-cortes-intel]

Some comments:

• Could make it clear that OMP settings related to affinity will not have an effect.
• Could provide commands to do all of this programmatically instead of manually listing the core IDs after looking at output.
• This advise is not really specific to sklearnex. Maybe could be put as an additional section and then linked from all the relevant articles, like NumPy and scikit-learn.

[david-cortes-intel]

It doesn't explain the longevity of the effect from this command. Same for the other CPU settings.

[Vika-F]

Could make it clear that OMP settings related to affinity will not have an effect.

Ok, will do.

Could provide commands to do all of this programmatically instead of manually listing the core IDs after looking at output.

You mean, python commands doing the same things like affinity modification?

This advise is not really specific to sklearnex. Maybe could be put as an additional section and then linked from all the relevant articles, like NumPy and scikit-learn.

Yes, I thought about it as well, but was not sure. I will restructure the pages accordingly.

[david-cortes-intel]

You mean, python commands doing the same things like affinity modification?

I guess they'd have to be shell commands, otherwise they wouldn't have an effect on an already-launched python process.