topdown: Created a component for interfacing with Intel's PERF_METRICS MSR #286
+1,420
−0
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…S MSR Add a component that collects Intel's topdown metrics from the PERF_METRICS MSR and automatically converts the raw metric values to user-consumable percentages. The intent of this component is to provide an intuitive interface for accessing topdown metrics on the supported processors. Tested on a RaptorLake-S/HX machine (family/model/stepping 0x6/0xb7/0x1). To add other supported architectures the switch statment in _topdown_init_component() should be populated for the architecture's model number, whether it supports level 2 topdown metrics, and in the case of a heterogeneous processor what core type it must be run on.
|
If desired, I can add entries for all of the models I am aware of that support the |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Pull Request Description
This PR adds a component that reads the PERF_METRICS Model Specific Register (MSR) and extracts topdown micro-architecture analysis metrics from it, converting those metrics to percentages automatically for ease of use. For example:
Tested systems:
papi_native_availpapi_component_availpapi_command_lineWhile this PR only adds support for RaptorLake, all IA32 systems that support the PERF_METRICS Model Specific Register should be able to be added without much hassle.
Author Checklist
Why this PR exists. Reference all relevant information, including background, issues, test failures, etc
Commits are self contained and only do one thing
Commits have a header of the form:
module: short descriptionCommits have a body (whenever relevant) containing a detailed description of the addressed problem and its solution
The PR needs to pass all the tests