From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2AF0F2BF3F3; Sun, 21 Jun 2026 15:57:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782057450; cv=none; b=LthbKNkpcn2TsusMHKEAiydkqkU4Tc90n7dK+WZq3zT0DolZIaO87no6fme0SHg/43fYIqNZHa6xPtQ2DRextPpmmFhJpVQvj4+1ywKySbW1h0QhVM1EBPX6k070YuIgNQhIshpx7+yhOJbF5rVGX/m6ZFoFXcHEevmV4v4xulI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782057450; c=relaxed/simple; bh=4qvCPMZ4f/BTRHBhPjuPfH/ksnZQhiXOziSUFm4y4xY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=EpumfS3lWCpmL2C6agU9iplW5c2UnEWo3BnyflM61SbbQXU873OlnGfvTwaCoecJ2m74OQb+AnI6lGa48bCib+V7AeiGgy8FGgoQvdHstpp9/UKA13oBYRfKPYytLGqTvFKVSfmvlTGfxmb93ovxsE//uZ4kn/3W6Z121glPPHI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=o0MnpeRU; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="o0MnpeRU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C45621F00A3E; Sun, 21 Jun 2026 15:57:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782057448; 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> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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