Hello Reinette,
The aim of this patch series is to improve the resctrl selftest. Without these fixes, some unnecessary processing will be executed and test results will be confusing. There is no behavior change in test themselves.
[patch 1] Make write_schemata() run to set up shemata with 100% allocation on first run in MBM test. [patch 2] The MBA test result message is always output as "ok", make output message to be "not ok" if MBA check result is failed. [patch 3] When a child process is created by fork(), the buffer of the parent process is also copied. Flush the buffer before executing fork(). [patch 4] An error occurs whether in parents process or child process, the parents process always kills child process and runs umount_resctrlfs(), and the child process always waits to be killed by the parent process. [patch 5] If a signal received, to cleanup properly before exiting the parent process, commonize the signal handler registered for CMT/MBM/MBA tests and reuse it in CAT, also unregister the signal handler at the end of each test. [patch 6] Before exiting each test CMT/CAT/MBM/MBA, clear test result files function cat/cmt/mbm/mba_test_cleanup() are called twice. Delete once.
This patch series is based on based on the "next" branch of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git
Pervious versions of this series: [v1] https://lore.kernel.org/lkml/20220914015147.3071025-1-tan.shaopeng@jp.fujits... [v2] https://lore.kernel.org/lkml/20221005013933.1486054-1-tan.shaopeng@jp.fujits... [v3] https://lore.kernel.org/lkml/20221101094341.3383073-1-tan.shaopeng@jp.fujits... [v4] https://lore.kernel.org/lkml/20221117010541.1014481-1-tan.shaopeng@jp.fujits... [v5] https://lore.kernel.org/lkml/20230111075802.3556803-1-tan.shaopeng@jp.fujits... [v6] https://lore.kernel.org/lkml/20230131054655.396270-1-tan.shaopeng@jp.fujitsu... [v7] https://lore.kernel.org/lkml/20230213062428.1721572-1-tan.shaopeng@jp.fujits... [v8] https://lore.kernel.org/lkml/20230215083230.3155897-1-tan.shaopeng@jp.fujits...
Shaopeng Tan (6): selftests/resctrl: Fix set up schemata with 100% allocation on first run in MBM test selftests/resctrl: Return MBA check result and make it to output message selftests/resctrl: Flush stdout file buffer before executing fork() selftests/resctrl: Cleanup properly when an error occurs in CAT test selftests/resctrl: Commonize the signal handler register/unregister for all tests selftests/resctrl: Remove duplicate codes that clear each test result file
tools/testing/selftests/resctrl/cat_test.c | 29 ++++---- tools/testing/selftests/resctrl/cmt_test.c | 7 +- tools/testing/selftests/resctrl/fill_buf.c | 14 ---- tools/testing/selftests/resctrl/mba_test.c | 23 +++---- tools/testing/selftests/resctrl/mbm_test.c | 20 +++--- tools/testing/selftests/resctrl/resctrl.h | 2 + .../testing/selftests/resctrl/resctrl_tests.c | 4 -- tools/testing/selftests/resctrl/resctrl_val.c | 67 ++++++++++++++----- tools/testing/selftests/resctrl/resctrlfs.c | 5 +- 9 files changed, 96 insertions(+), 75 deletions(-)