Implement a simple kunit test for testing the behavior of the core logic of the goal-oriented feedback-driven DAMOS quota auto-tuning.
Signed-off-by: SeongJae Park sj@kernel.org --- mm/damon/core-test.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h index f405d79dc623..c2b8cb25a195 100644 --- a/mm/damon/core-test.h +++ b/mm/damon/core-test.h @@ -447,6 +447,37 @@ static void damos_test_filter_out(struct kunit *test) damos_free_filter(f); }
+static void damon_test_feed_loop_next_input(struct kunit *test) +{ + unsigned long last_input = 900000, current_score = 200; + + /* + * If current score is lower than the goal, which is always 10,000 + * (read the comment on damon_feed_loop_next_input()'s comment), next + * input should be higher than the last input. + */ + KUNIT_EXPECT_GT(test, + damon_feed_loop_next_input(last_input, current_score), + last_input); + + /* + * If current score is higher than the goal, next input should be lower + * than the last input. + */ + current_score = 250000000; + KUNIT_EXPECT_LT(test, + damon_feed_loop_next_input(last_input, current_score), + last_input); + + /* + * The next input depends on the distance between the current score and + * the goal + */ + KUNIT_EXPECT_GT(test, + damon_feed_loop_next_input(last_input, 200), + damon_feed_loop_next_input(last_input, 2000)); +} + static struct kunit_case damon_test_cases[] = { KUNIT_CASE(damon_test_target), KUNIT_CASE(damon_test_regions), @@ -463,6 +494,7 @@ static struct kunit_case damon_test_cases[] = { KUNIT_CASE(damon_test_moving_sum), KUNIT_CASE(damos_test_new_filter), KUNIT_CASE(damos_test_filter_out), + KUNIT_CASE(damon_test_feed_loop_next_input), {}, };