latency_project_files

[Creed2002]

Description

PEBS Sandy Bridge microarchitecture
Latency Measurement Program

Type of change

Program Added

How Has This Been Tested?

Tested within Linux Bash script using Intel documentation on LLNL Machines.

Checklist:

• I have run ./scripts/check-code-format.sh and confirm my code code follows the style guidelines of variorum
• I have added comments in my code
• [x ] My changes generate no new warnings (build with -DENABLE_WARNINGS=ON)
• [x ] New and existing unit tests pass with my changes

Thank you for taking the time to contribute to Variorum!

[rountree]

@Creed2002 I'd like to see this functionality included in the library---as in, an application that is linked to the Variorum library can call a C function and measure latency. Try compiling and examining some of the sample programs that come with Variorum to see how this works.

[Creed2002]

Gotcha. I’ll try that out Get Outlook for iOS<https://aka.ms/o0ukef>

…

________________________________ From: Barry Rountree ***@***.***> Sent: Thursday, June 27, 2024 11:06:01 AM To: LLNL/variorum ***@***.***> Cc: Creed2002 ***@***.***>; Mention ***@***.***> Subject: Re: [LLNL/variorum] latency_project_files (PR #560) @Creed2002<https://github.com/Creed2002> I'd like to see this functionality included in the library---as in, an application that is linked to the Variorum library can call a C function and measure latency. Try compiling and examining some of the sample programs that come with Variorum to see how this works. — Reply to this email directly, view it on GitHub<#560 (comment)>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/A3KRM57FX5HXP6H2Z5MTA53ZJRIATAVCNFSM6AAAAABKANBETOVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZDCOJVGM2TAMJZGY>. You are receiving this because you were mentioned.Message ID: ***@***.***>

[tpatki]

@rountree @Creed2002

• Can you describe this PR a bit more clearly and open an associated issue of what the high-level problem you're trying to solve?
• What is the PR trying to do with PEBS and how does this connect with Variorum?
  Where do we expect this to extend existing functionality: are we thinking of adding a new API to Variorum eventually?
• Is this expected supported only Intel systems? Or Intel and AMD (x86)? If it is specific to one platform, we should consider creating an advanced API header within Variorum. As of now, I see two scripts with some wrmsr commands for PEBS and not sure how these are fitting in to Variorum.
• Is it intended for production or research (I can tag accordingly in milestones)?

[tpatki]

Superseded by #566.