RE: [PATCH v3 0/4] selftests/resctrl: Enable MBM and MBA tests on AMD

[Shaopeng Tan (Fujitsu)]

Hello Babu,
 
I think you are still planning to upstream this patch series.
Do you have a timeline for posting v4? And when do you anticipate it being merged?

I'd like to enable MBM/MBA tests for ARM arch (MPAM driver),
However, I foresee potential conflicts if this patch series is not merged.
I apologize for the inconvenience, I kindly request your attention to this matter.

Hello James, Dave,

Have you already considered or made any plans to enable the MBM/MBA tests for the MPAM driver?

Best regards,
Shaopeng TAN


> 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.
> 
> v3:
>     Note: Based the series on top of latest kselftests/master
>     1613e604df0cd359cf2a7fbd9be7a0bcfacfabd0 (tag: v6.10-rc1).
> 
>     Also applied the patches from the series
> 
> https://lore.kernel.org/lkml/20240531131142.1716-1-ilpo.jarvinen@linux.intel.
> com/
> 
>     Separated the fix patch.
>     Renamed the imc to just mc to make it generic.
>     Changed the search string "uncore_imc_" and "amd_umc_"
>     Changes related rebase to latest kselftest tree.
> 
> v2: Changes.
>     a. Rebased on top of tip/master (Apr 25, 2024)
>     b. Addressed Ilpo comments except the one about close call.
>        It seems more clear to keep READ and WRITE separate.
> 
> https://lore.kernel.org/lkml/8e4badb7-6cc5-61f1-e041-d902209a90d5@linux.
> intel.com/
>     c. Used ksft_perror call when applicable.
>     d. Added vendor check for non contiguous CBM check.
> 
> v1: https://lore.kernel.org/lkml/cover.1708637563.git.babu.moger@xxxxxxx/
> 
> 
> Babu Moger (4):
>   selftests/resctrl: Rename variables and functions to generic names
>   selftests/resctrl: Pass sysfs controller name of the vendor
>   selftests/resctrl: Add support for MBM and MBA tests on AMD
>   selftests/resctrl: Enable MBA/MBA tests on AMD
> 
>  tools/testing/selftests/resctrl/mba_test.c    |  25 +-
>  tools/testing/selftests/resctrl/mbm_test.c    |  23 +-
>  tools/testing/selftests/resctrl/resctrl.h     |   2 +-
>  tools/testing/selftests/resctrl/resctrl_val.c | 305 ++++++++++--------
>  tools/testing/selftests/resctrl/resctrlfs.c   |   2 +-
>  5 files changed, 191 insertions(+), 166 deletions(-)
> 
> --
> 2.34.1
>