selftests/damon/damon_nr_regions: sort collected regiosn before checking with min/max boundaries

damon_nr_regions.py starts DAMON, periodically collect number of regions
in snapshots, and see if it

selftests/damon/damon_nr_regions: sort collected regiosn before checking with min/max boundaries

damon_nr_regions.py starts DAMON, periodically collect number of regions
in snapshots, and see if it is in the requested range. The check code
assumes the numbers are sorted on the collection list, but there is no
such guarantee. Hence this can result in false positive test success.
Sort the list before doing the check.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 781497347d1b ("selftests/damon: implement test for min/max_nr_regions")
Signed-off-by: SeongJae Park <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests/damon/damon_nr_regions: set ops update for merge results check to 100ms

damon_nr_regions.py updates max_nr_regions to a number smaller than
expected number of real regions and confirms DAM

selftests/damon/damon_nr_regions: set ops update for merge results check to 100ms

damon_nr_regions.py updates max_nr_regions to a number smaller than
expected number of real regions and confirms DAMON respect the harsh
limit. To give time for DAMON to make changes for the regions, 3
aggregation intervals (300 milliseconds) are given.

The internal mechanism works with not only the max_nr_regions, but also
sz_limit, though. It avoids merging region if that casn make region of
size larger than sz_limit. In the test, sz_limit is set too small to
achive the new max_nr_regions, unless it is updated for the new
min_nr_regions. But the update is done only once per operations set
update interval, which is one second by default.

Hence, the test randomly incurs false positive failures. Fix it by
setting the ops interval same to aggregation interval, to make sure
sz_limit is updated by the time of the check.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: 8bf890c81612 ("selftests/damon/damon_nr_regions: test online-tuned max_nr_regions")
Signed-off-by: SeongJae Park <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests/damon/damos_quota: make real expectation of quota exceeds

Patch series "selftests/damon: three fixes for false results".

Fix three DAMON selftest bugs that cause two and one false positiv

selftests/damon/damos_quota: make real expectation of quota exceeds

Patch series "selftests/damon: three fixes for false results".

Fix three DAMON selftest bugs that cause two and one false positive
failures and successes.


This patch (of 3):

damos_quota.py assumes the quota will always exceeded. But whether quota
will be exceeded or not depend on the monitoring results. Actually the
monitored workload has chaning access pattern and hence sometimes the
quota may not really be exceeded. As a result, false positive test
failures happen. Expect how much time the quota will be exceeded by
checking the monitoring results, and use it instead of the naive
assumption.

Link: https://lkml.kernel.org/r/[email protected]
Link: https://lkml.kernel.org/r/[email protected]
Fixes: 51f58c9da14b ("selftests/damon: add a test for DAMOS quota")
Signed-off-by: SeongJae Park <[email protected]>
Cc: Shuah Khan <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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selftests/damon/damos_quota_goal: handle minimum quota that cannot be further reduced

damos_quota_goal.py selftest see if DAMOS quota goals tuning feature
increases or reduces the effective size quo

selftests/damon/damos_quota_goal: handle minimum quota that cannot be further reduced

damos_quota_goal.py selftest see if DAMOS quota goals tuning feature
increases or reduces the effective size quota for given score as expected.
The tuning feature sets the minimum quota size as one byte, so if the
effective size quota is already one, we cannot expect it further be
reduced. However the test is not aware of the edge case, and fails since
it shown no expected change of the effective quota. Handle the case by
updating the failure logic for no change to see if it was the case, and
simply skips to next test input.

Link: https://lkml.kernel.org/r/[email protected]
Fixes: f1c07c0a1662 ("selftests/damon: add a test for DAMOS quota goal")
Signed-off-by: SeongJae Park <[email protected]>
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-lkp/[email protected]
Cc: Shuah Khan <[email protected]>
Cc: <[email protected]> [6.10.x]
Signed-off-by: Andrew Morton <[email protected]>

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