Factor out tracing and optimization heuristics into a single "policy" object.

[markshannon]

The SAI, tracer and optimizer all contain a number of heuristics about when to optimize, how to link the optimized code and when to backoff, etc.

Almost all of these heuristics are just numbers.
We should group them together into a single "policy" object, improving consistency and enabling experimentation.

Linked PRs

• gh-141504: Factor out tracing and optimization heuristics into a single object #143381
• gh-141504: Refactor policy object into a single opt_config #143644
• gh-141504: Move PYTHON_UOPS_OPTIMIZE to policy object #144082

[Fidget-Spinner]

This sounds rather promising. It would also enable per-system configurations, like pypy which would be great.

[Krishna-web-hub]

Hi @markshannon , @Fidget-Spinner,

As we can see the SAI and tracer and optimizers all contains a lot of numbers which make it difficult to do any changes. And i appreciate the idea to make common policy for them such that we can pinpoint the exact area where the error is produced rather than searching here and there.

So i came up with an idea of creating a header file policy.h which will be telling what structure and functions are defined or used in the main code and along with the logic of the function will be present inside the policy.c where we will be having the function logic for when to start optimizing the function and also when to stops the function. Then we will be replacing the loop inside value with the function which return Boolean value as the and according to that the loop will stops or checking is done.

But the issue is that after that we will have to replace many function to increase the speed and make it easier to handle any changes or disturbances which is going to take long time but in other hand it is like a updated version of 3.15 which is a little bit better than it.
So i suggest that we can work on it by breaking into small segments so that will also be better and easier for us to approach this idea.

If you like this idea let me know. I will generate a pr for it.

[Fidget-Spinner]

@Krishna-web-hub Sorry I don't think you're on the right track. Please don't take this issue.

[Krishna-web-hub]

Thanks for the feedback, @Fidget-Spinner. I'll read through the original proposal again and see if I can come up with an approach that better fits the 'single policy object' goal.

[Fidget-Spinner]

@Krishna-web-hub I don't think this is a good issue for beginners. So you might want to try another issue

[Fidget-Spinner]

@corona10 and I are working on it.