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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <cover.1717626661.git.babu.moger@amd.com>
Date: Wed, 5 Jun 2024 17:45:30 -0500
From: Babu Moger <babu.moger@....com>
To: <fenghua.yu@...el.com>, <reinette.chatre@...el.com>, <shuah@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <linux-kselftest@...r.kernel.org>,
	<ilpo.jarvinen@...ux.intel.com>, <babu.moger@....com>,
	<maciej.wieczor-retman@...el.com>, <peternewman@...gle.com>,
	<eranian@...gle.com>
Subject: [PATCH v3 0/4] selftests/resctrl: Enable MBM and MBA tests on AMD


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@amd.com/


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