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mm/damon/tests/core-kunit: test damon_mvsum()

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Add a simple unit test for damon_nr_accesses_mvsum()'s internal core
logic, damon_mvsum().  The test contains cases for just-started windows,
partially completed windows, and just-completed windows.

Link: https://lore.kernel.org/20260630040812.149729-3-sj@kernel.org
Signed-off-by: SJ Park <sj@kernel.org>
Cc: Brendan Higgins <brendan.higgins@linux.dev>
Cc: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SJ Park
2026-06-29 21:07:55 -07:00
committed by Andrew Morton
parent 9f3786d860
commit f8dbb118fa
1 changed files with 25 additions and 0 deletions
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25
mm/damon/tests/core-kunit.h
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@@ -682,6 +682,30 @@ static void damon_test_moving_sum(struct kunit *test)
}
}
static void damon_test_mvsum(struct kunit *test)
{
unsigned long input_expects[] = {
/* current value, last value, remaining window (bp) */
0, 49, 10000, 49, /* 0 + 49 * 1 */
3, 10, 7000, 10, /* 3 + 10 * 0.7 */
3, 10, 5000, 8, /* 3 + 10 * 0.5 */
32, 100, 1000, 42, /* 32 + 100 * 0.1 */
42, 49, 0, 42, /* 42 + 49 * 0 */
};
int i;
for (i = 0; i < ARRAY_SIZE(input_expects); i += 4) {
unsigned long current_nr = input_expects[i];
unsigned long last_nr = input_expects[i + 1];
unsigned long left_window_bp = input_expects[i + 2];
unsigned long expect = input_expects[i + 3];
KUNIT_EXPECT_EQ(test, damon_mvsum(current_nr, last_nr,
left_window_bp), expect);
}
}
static void damos_test_new_filter(struct kunit *test)
{
struct damos_filter *filter;
@@ -1575,6 +1599,7 @@ static struct kunit_case damon_test_cases[] = {
KUNIT_CASE(damon_test_update_monitoring_result),
KUNIT_CASE(damon_test_set_attrs),
KUNIT_CASE(damon_test_moving_sum),
KUNIT_CASE(damon_test_mvsum),
KUNIT_CASE(damos_test_new_filter),
KUNIT_CASE(damos_test_commit_quota_goal),
KUNIT_CASE(damos_test_commit_quota_goals),