From nobody Wed Oct 8 12:33:58 2025 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 B657024E4D4; Sat, 28 Jun 2025 16:04:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751126677; cv=none; b=EFGk9NEon6Eic3Vti8ROF3QGvRmlSqbszMdk1ljV/RD4dV0x9JGC247+yqev0KaEqxZcFkqZI5kbJOyMVD6+Z61582JLS9H3lMePa81OkqP9L5C2phLsEisayuW8k8MQHcZaO0/WlyWKB5T0FNDtSOd1zMtSBjHnrjEFXl79ZBU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751126677; c=relaxed/simple; bh=pHn9v+99jI3xSiVYbi8lj20xdzjr33kYRD7kjoO8nBY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=juJ0+eAQLS9fI+Wt/nEY1vAYkTwPfAX4r6G9R48IpFiBK+zLraiuqHwLOly646UXnVEhNyprO1o4d1lk0GcttpyKm+q2Xm5LaDy6ICLZbwrg19aYsI4r2k7ncZ/ZXOPTkCvyWk/+qjbPal1F4GiImC48upmfh+BGNRATUEx50pc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=nWThUJGM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="nWThUJGM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0FB55C4CEED; Sat, 28 Jun 2025 16:04:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1751126675; bh=pHn9v+99jI3xSiVYbi8lj20xdzjr33kYRD7kjoO8nBY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=nWThUJGMxmZ9QzBclE+lbiYiSfrIsn1T9tlYlp/FqQuMJEPPDcqepJN5XeHpDzReE PbqAfvW6Tz0uWXRMGKGVWitby+edQLBAdIX+OM6V5Z6hcz/OHdQqhqMqmfWemabo8E ohCL68eUSjTEY3Pl3v5tmov4J7y2Px5Qkr3MV5BcXBLeydm1fsxgWvl/8U2mlqb8KA /Mw03VzTki158ViwLNhGTTYnawJ3IjsesAyW7bSZsnhdG7nZEEZuRSHxMJCDvFNqF/ /KJlLrAYYf58jIK+TlENvlqR463iTv4F7uu9le17ti5hEpp6FINPJeOw70IX7owwYT b2yu8eZO/kzPA== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 3/6] selftests/damon: add python and drgn-based DAMON sysfs test Date: Sat, 28 Jun 2025 09:04:25 -0700 Message-Id: <20250628160428.53115-4-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250628160428.53115-1-sj@kernel.org> References: <20250628160428.53115-1-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: quoted-printable Content-Type: text/plain; charset="utf-8" Add a python-written DAMON sysfs functionality selftest. It sets DAMON parameters using Python module _damon_sysfs, reads updated kernel internal DAMON status and parameters using a 'drgn' script, namely drgn_dump_damon_status.py, and compare if the resulted DAMON internal status is as expected. The test is very minimum at the moment. Signed-off-by: SeongJae Park --- tools/testing/selftests/damon/Makefile | 1 + tools/testing/selftests/damon/sysfs.py | 42 ++++++++++++++++++++++++++ 2 files changed, 43 insertions(+) create mode 100755 tools/testing/selftests/damon/sysfs.py diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftes= ts/damon/Makefile index e888455e3cf8..5b230deb19e8 100644 --- a/tools/testing/selftests/damon/Makefile +++ b/tools/testing/selftests/damon/Makefile @@ -7,6 +7,7 @@ TEST_FILES =3D _damon_sysfs.py =20 # functionality tests TEST_PROGS +=3D sysfs.sh +TEST_PROGS +=3D sysfs.py TEST_PROGS +=3D sysfs_update_schemes_tried_regions_wss_estimation.py TEST_PROGS +=3D damos_quota.py damos_quota_goal.py damos_apply_interval.py TEST_PROGS +=3D damos_tried_regions.py damon_nr_regions.py diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftes= ts/damon/sysfs.py new file mode 100755 index 000000000000..4ff99db0d247 --- /dev/null +++ b/tools/testing/selftests/damon/sysfs.py @@ -0,0 +1,42 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +import json +import os +import subprocess + +import _damon_sysfs + +def dump_damon_status_dict(pid): + file_dir =3D os.path.dirname(os.path.abspath(__file__)) + dump_script =3D os.path.join(file_dir, 'drgn_dump_damon_status.py') + rc =3D subprocess.call(['drgn', dump_script, pid, 'damon_dump_output'], + stderr=3Dsubprocess.DEVNULL) + if rc !=3D 0: + return None, 'drgn fail' + try: + with open('damon_dump_output', 'r') as f: + return json.load(f), None + except Exception as e: + return None, 'json.load fail (%s)' % e + +def main(): + kdamonds =3D _damon_sysfs.Kdamonds( + [_damon_sysfs.Kdamond(contexts=3D[_damon_sysfs.DamonCtx()])]) + err =3D kdamonds.start() + if err is not None: + print('kdamond start failed: %s' % err) + exit(1) + + status, err =3D dump_damon_status_dict(kdamonds.kdamonds[0].pid) + if err is not None: + print(err) + exit(1) + + if len(status['contexts']) !=3D 1: + print('number of contexts: %d' % len(status['contexts'])) + exit(1) + kdamonds.stop() + +if __name__ =3D=3D '__main__': + main() --=20 2.39.5