linux-kernel - [PATCH v4 0/7] selftests/resctrl: Fixes to failing tests

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Date:   Mon,  2 Oct 2023 12:48:06 +0300
From:   Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To:     linux-kselftest@...r.kernel.org, Shuah Khan <shuah@...nel.org>,
        Reinette Chatre <reinette.chatre@...el.com>,
        Maciej Wieczór-Retman 
        <maciej.wieczor-retman@...el.com>,
        Shaopeng Tan <tan.shaopeng@...fujitsu.com>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: [PATCH v4 0/7] selftests/resctrl: Fixes to failing tests

Fix four issues with resctrl selftests.

The signal handling fix became necessary after the mount/umount fixes
and the uninitialized member bug was discovered during the review.

The other two came up when I ran resctrl selftests across the server
fleet in our lab to validate the upcoming CAT test rewrite (the rewrite
is not part of this series).

These are developed and should apply cleanly at least on top the
benchmark cleanup series (might apply cleanly also w/o the benchmark
series, I didn't test).

v4:
- Use func(void) for functions taking no arguments
- Correct Fixes tag formatting

v3:
- Add fix to uninitialized sa_flags
- Handle ksft_exit_fail_msg() in per test functions
- Make signal handler register fails to also exit
- Improve changelogs

v2:
- Include patch to move _GNU_SOURCE to Makefile to allow normal #include
  placement
- Rework the signal register/unregister into patch to use helpers
- Fixed incorrect function parameter description
- Use return !!res to avoid confusing implicit boolean conversion
- Improve MBA/MBM success bound patch's changelog
- Tweak Cc: stable dependencies (make it a chain).


Ilpo Järvinen (7):
  selftests/resctrl: Fix uninitialized .sa_flags
  selftests/resctrl: Extend signal handler coverage to unmount on
    receiving signal
  selftests/resctrl: Remove duplicate feature check from CMT test
  selftests/resctrl: Move _GNU_SOURCE define into Makefile
  selftests/resctrl: Refactor feature check to use resource and feature
    name
  selftests/resctrl: Fix feature checks
  selftests/resctrl: Reduce failures due to outliers in MBA/MBM tests

 tools/testing/selftests/resctrl/Makefile      |  2 +-
 tools/testing/selftests/resctrl/cat_test.c    |  8 --
 tools/testing/selftests/resctrl/cmt_test.c    |  3 -
 tools/testing/selftests/resctrl/mba_test.c    |  2 +-
 tools/testing/selftests/resctrl/mbm_test.c    |  2 +-
 tools/testing/selftests/resctrl/resctrl.h     |  7 +-
 .../testing/selftests/resctrl/resctrl_tests.c | 82 ++++++++++++-------
 tools/testing/selftests/resctrl/resctrl_val.c | 26 +++---
 tools/testing/selftests/resctrl/resctrlfs.c   | 69 ++++++----------
 9 files changed, 97 insertions(+), 104 deletions(-)

-- 
2.30.2