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 83A723DA5B4; Tue, 30 Jun 2026 04:08:24 +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=1782792505; cv=none; b=kxsvzr7wQ43MVlkDkgVyPJKXHF02es6UyA1I9xxQftvzmTrb3Ei23NKWtMXQAqbO7jQImACh3eg/nJvcMzRlMRmY1Mhtc6/s8kOjuqBUnWzGCyukgcrbjTuoK5J8QmeWJuY6DYO7nk10Cpc76WMbedGQssjfb2tzm7fQAJoCpYY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782792505; c=relaxed/simple; bh=QOrbqnAZdddH0sVDt9AkuRyEHXziBaKfZhTCe7FwKCQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=C7/ySMnwhvAQiuyks9XmkaItpuB9DTqkWqcwQIpvG/1E3Mt7Easmnz4vdzwtSdEofT3Z3etkH974qI9YMZD5HoT6NrnYVT4N4Av9PjN+nLlYZ0GO7RZAz8AeSYtp5Ss+W8zS2dicqRjY1e/3+003zO++TQs+CTZ+sRYGiaFGaW0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=IbfmI2ii; 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="IbfmI2ii" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 11AC41F00A3D; Tue, 30 Jun 2026 04:08:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1782792504; bh=8GC3wyUkKm2lBSXyC75E/pWZjQqr+3L3eUEF2Xn7YLI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=IbfmI2iiyt4NEusU5XXmPmaAf23CVDfD5ij+jZNxdxrzC62RThcIfkwmnk1MCh3bC 1JW7MVu+3TNElaw9LYdiWH4WiQgdEl3r4iNZvuPK3KyG8yAvVtxYCCFcAChKn8qJjZ DG94BswKjRjr1jqmqV1aXsMK/+aSyVTTgSN9qqqqy+zirZ1sSZKMeaZfe+0CKOhWR4 uMta/hBhs2s42SIMj/hNpk766h2TSuvdGFlgDz5SnQPxcKkTPQRd6WHvO22Sll13gS cDRn2Cg20r3FT4r8J3scMb/LfDkOOJ1Oy9pFglG/aGUN880s4Kq1urDoNjH+wBWFCW XS9r584calg0w== From: SJ Park To: Andrew Morton Cc: SJ Park , 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: [PATCH 02/18] mm/damon/tests/core-kunit: test damon_mvsum() Date: Mon, 29 Jun 2026 21:07:55 -0700 Message-ID: <20260630040812.149729-3-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260630040812.149729-1-sj@kernel.org> References: <20260630040812.149729-1-sj@kernel.org> Precedence: bulk X-Mailing-List: damon@lists.linux.dev 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: SJ 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 a00168730445d..ff13d1b1cbc94 100644 --- a/mm/damon/tests/core-kunit.h +++ b/mm/damon/tests/core-kunit.h @@ -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; @@ -1561,6 +1585,7 @@ 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