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bh=dGqKzRnIP+DKXc/Th2v0SJe+T3xtV4bAe2ASi7qsS9Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=o0MnpeRU7Bd1V5NtFQdnEKhZt6TNXi+Ip9i2mq+QYLhqMp7sfjAtmQbj37MTDbt5p ztl+93FSsTnNeksUONb97v5/CytrjrsIZiFRdW5nY0efklO5am5XuZROX2batRQaUF DErYKF6n9Q9ErKHqqCGaBumc36cMXNI2RpRcL9E6HrPmjfLNq5DKvPqTWt6dGGuVyB FeQ0dzd0BbUBLL4izOmz2jtUBE4fJkGcd6ikYFfm8lFZqRzsis9iX0onNMsMW2T0ri VLIDbNND+TR5LFxqTS4o6gY8sB3xNu90/c1Xiglfo6FLoPMmKxj0X88uQl2YWhIb31 /uYW9j6Ru6L5w== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , Brendan Higgins , David Gow , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v1.2 02/17] mm/damon/tests/core-kunit: test damon_mvsum() Date: Sun, 21 Jun 2026 08:56:58 -0700 Message-ID: <20260621155715.87932-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260621155715.87932-1-sj@kernel.org> References: <20260621155715.87932-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: ykfi3rskixhzyy9myjr3rgu43xc44s8x X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 86C60C0003 X-HE-Tag: 1782057449-341844 X-HE-Meta: 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 PiSsrix0 mYfkwQLmZR6QuCwaiMjCSr71G1CTwbJ2szyPSJ1DQH0tCjHCofooRNroFScx8CyGs1EG9mFK0i6jqCnarqkz7fWH2kCNuX/ogamR2Pxp2W01S1gLeN4dTEK2PEY7SWieyegqeQqPaH08fxESbcg10N9DyQvfDgyPcan155/yqIvLuIo/4cPzZQByZPQtxGgWPfRvGv2JA989AeH7YPd+zU6PVFLYeZqsDOqvJtaRp1gNNJZec1GH8iDB1fyTNeGfdGm8/d825OkNo1uzGThNo5nAfuA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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. Signed-off-by: SeongJae Park --- mm/damon/tests/core-kunit.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/mm/damon/tests/core-kunit.h b/mm/damon/tests/core-kunit.h index 4e448c08c724a..cdab14396250f 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -623,6 +623,30 @@ 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; @@ -1501,6 +1525,7 @@ 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), -- 2.47.3