linux-kernel - Re: [PATCH v2 0/4] selftests/resctrl: Enable MBM and MBA tests on AMD

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Date: Thu, 9 May 2024 14:10:09 -0700
From: Reinette Chatre <reinette.chatre@...el.com>
To: Babu Moger <babu.moger@....com>, <fenghua.yu@...el.com>,
	<shuah@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<ilpo.jarvinen@...ux.intel.com>, <maciej.wieczor-retman@...el.com>,
	<peternewman@...gle.com>, <eranian@...gle.com>
Subject: Re: [PATCH v2 0/4] selftests/resctrl: Enable MBM and MBA tests on AMD

Hi Babu,

On 4/25/2024 1:16 PM, Babu Moger wrote:
> 
> The MBM (Memory Bandwidth Monitoring) and MBA (Memory Bandwidth Allocation)
> features are not enabled for AMD systems. The reason was lack of perf
> counters to compare the resctrl test results.
> 
> Starting with the commit
> 25e56847821f ("perf/x86/amd/uncore: Add memory controller support"), AMD
> now supports the UMC (Unified Memory Controller) perf events. These events
> can be used to compare the test results.
> 
> This series adds the support to detect the UMC events and enable MBM/MBA
> tests for AMD systems.
> 
> v2: Changes.
>     a. Rebased on top of tip/master (Apr 25, 2024)

Please note that resctrl selftest changes flow upstream via the kselftest
repo. The latest resctrl selftest changes can be found on the "next" branch
there.

Reinette