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From:   SeongJae Park <sj@kernel.org>
To:     Andrew Morton <akpm@linux-foundation.org>
Cc:     SeongJae Park <sj@kernel.org>, brendanhiggins@google.com,
        kunit-dev@googlegroups.com, damon@lists.linux.dev,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH 3/3] mm/damon/core-test: add a test for damon_update_monitoring_results()
Date:   Thu, 19 Jan 2023 01:38:31 +0000
Message-Id: <20230119013831.1911-4-sj@kernel.org>
In-Reply-To: <20230119013831.1911-1-sj@kernel.org>
References: <20230119013831.1911-1-sj@kernel.org>
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Add a simple unit test for damon_update_monitoring_results() function.

Signed-off-by: SeongJae Park <sj@kernel.org>
---
 mm/damon/core-test.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/mm/damon/core-test.h b/mm/damon/core-test.h
index 3db9b7368756..fae64d32b925 100644
--- a/mm/damon/core-test.h
+++ b/mm/damon/core-test.h
@@ -289,6 +289,35 @@ static void damon_test_set_regions(struct kunit *test)
 	damon_destroy_target(t);
 }
 
+static void damon_test_update_monitoring_result(struct kunit *test)
+{
+	struct damon_attrs old_attrs = {
+		.sample_interval = 10, .aggr_interval = 1000,};
+	struct damon_attrs new_attrs;
+	struct damon_region *r = damon_new_region(3, 7);
+
+	r->nr_accesses = 15;
+	r->age = 20;
+
+	new_attrs = (struct damon_attrs){
+		.sample_interval = 100, .aggr_interval = 10000,};
+	damon_update_monitoring_result(r, &old_attrs, &new_attrs);
+	KUNIT_EXPECT_EQ(test, r->nr_accesses, 15);
+	KUNIT_EXPECT_EQ(test, r->age, 2);
+
+	new_attrs = (struct damon_attrs){
+		.sample_interval = 1, .aggr_interval = 1000};
+	damon_update_monitoring_result(r, &old_attrs, &new_attrs);
+	KUNIT_EXPECT_EQ(test, r->nr_accesses, 150);
+	KUNIT_EXPECT_EQ(test, r->age, 2);
+
+	new_attrs = (struct damon_attrs){
+		.sample_interval = 1, .aggr_interval = 100};
+	damon_update_monitoring_result(r, &old_attrs, &new_attrs);
+	KUNIT_EXPECT_EQ(test, r->nr_accesses, 150);
+	KUNIT_EXPECT_EQ(test, r->age, 20);
+}
+
 static struct kunit_case damon_test_cases[] = {
 	KUNIT_CASE(damon_test_target),
 	KUNIT_CASE(damon_test_regions),
@@ -299,6 +328,7 @@ static struct kunit_case damon_test_cases[] = {
 	KUNIT_CASE(damon_test_split_regions_of),
 	KUNIT_CASE(damon_test_ops_registration),
 	KUNIT_CASE(damon_test_set_regions),
+	KUNIT_CASE(damon_test_update_monitoring_result),
 	{},
 };
 
-- 
2.25.1