linux-kernel - Re: [PATCH v2 09/16] x86/resctrl: Add detailed descriptions for Clearwater Forest events

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Message-ID: <03f00372-e863-4405-a077-86173e39368c@intel.com>
Date: Mon, 31 Mar 2025 09:21:11 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghuay@...dia.com>, "Maciej
 Wieczor-Retman" <maciej.wieczor-retman@...el.com>, Peter Newman
	<peternewman@...gle.com>, James Morse <james.morse@....com>, Babu Moger
	<babu.moger@....com>, Drew Fustini <dfustini@...libre.com>, Dave Martin
	<Dave.Martin@....com>
CC: <linux-kernel@...r.kernel.org>, <patches@...ts.linux.dev>
Subject: Re: [PATCH v2 09/16] x86/resctrl: Add detailed descriptions for
 Clearwater Forest events

Hi Tony,

On 3/21/25 4:15 PM, Tony Luck wrote:
> There are two event groups one for energy reporting and another
> for "perf" events.
> 
> See the XML description files in https://github.com/intel/Intel-PMT
> in the xml/CWF/OOBMSM/{RMID-ENERGY,RMID-PERF}/ for the detailed
> descriptions that were used to derive these descriptions.

It is unexpected to me that this is made model specific while the
implementation is built around a guid. What will happen when
a new system using the same event layout arrives? Will the url
above be duplicated for this new system's acronym and contain
duplicate data? How will the resctrl support change? If I understand
correctly resctrl will not need to be changed but instead the "CWF"
events will just automatically be used for this new hypothetical
system? This makes me think that this should not be so CWF specific.

Reinette