This patch set has several miscellaneous fixes to resctrl selftest tool. Some fixes are minor in nature while other are major fixes.
The minor fixes are 1. Typos, comment format 2. Fix MBA feature detection 3. Fix a bug while selecting sibling cpu 4. Remove unnecessary use of variable arguments 5. Change MBM/MBA results reporting format from absolute values to percentage
The major fixes are changing CAT and CQM test cases. CAT test wasn't testing CAT as it isn't using the cache it's allocated, hence, change the test case to test noisy neighbor use case. CAT guarantees a user specified amount of cache for a process or a group of processes, hence test this use case. The updated test case checks if critical process is impacted by noisy neighbor or not. If it's impacted the test fails.
The present CQM test assumes that all the allocated memory (size less than LLC size) for a process will fit into cache and there won't be any overlappings. While this is mostly true, it cannot be *always* true by the nature of how cache works i.e. two addresses could index into same cache line. Hence, change CQM test such that it now uses CAT. Allocate a specific amount of cache using CAT and check if CQM reports more than what CAT has allocated.
Fenghua Yu (1): selftests/resctrl: Fix missing options "-n" and "-p"
Reinette Chatre (4): selftests/resctrl: Fix feature detection selftests/resctrl: Fix typo selftests/resctrl: Fix typo in help text selftests/resctrl: Ensure sibling CPU is not same as original CPU
Sai Praneeth Prakhya (8): selftests/resctrl: Fix MBA/MBM results reporting format selftests/resctrl: Don't use variable argument list for setup function selftests/resctrl: Fix typos selftests/resctrl: Modularize fill_buf for new CAT test case selftests/resctrl: Change Cache Allocation Technology (CAT) test selftests/resctrl: Change Cache Quality Monitoring (CQM) test selftests/resctrl: Dynamically select buffer size for CAT test selftests/resctrl: Cleanup fill_buff after changing CAT test
tools/testing/selftests/resctrl/cache.c | 179 ++++++++----- tools/testing/selftests/resctrl/cat_test.c | 322 +++++++++++++----------- tools/testing/selftests/resctrl/cqm_test.c | 210 +++++++++------- tools/testing/selftests/resctrl/fill_buf.c | 113 ++++++--- tools/testing/selftests/resctrl/mba_test.c | 32 ++- tools/testing/selftests/resctrl/mbm_test.c | 33 ++- tools/testing/selftests/resctrl/resctrl.h | 19 +- tools/testing/selftests/resctrl/resctrl_tests.c | 26 +- tools/testing/selftests/resctrl/resctrl_val.c | 22 +- tools/testing/selftests/resctrl/resctrlfs.c | 52 +++- 10 files changed, 592 insertions(+), 416 deletions(-)