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b=kt8oW8Epd/RneOTAgnbfU7Ap9ThPd4rWlYYJqr5Al1DnENKRGu3jCHwUHt7BjrLKn Kt/U/OiaGp0Kq4tEf1sdmbDVm/xAu3SosutN2zj/pNU/Kdh9JHi68whff9F+4UkkC+ 3+egOtK2NqWa2M9VixcD7IimNUNvO7Ro6z6n/pp1Di2c4ooeaP4w3DF1QGAsfwwG8Z DU+bZQ0ToG+Ytddap7fw1s3lhq7wK3qTQAQIEmxU87Fq8VL8YxFtqxix2ypWhC5FgN 6BBoMPPzSgxDj2JzY7Ml0RwqZM2bF/Fbp680EFv4+IJEdJ643ODv08+G0+SYC6W1tc rGQDZASdhSlHw== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , 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: [RFC PATCH 3/6] selftests/damon: add python and drgn-based DAMON sysfs test Date: Sun, 22 Jun 2025 14:03:27 -0700 Message-Id: <20250622210330.40490-4-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250622210330.40490-1-sj@kernel.org> References: <20250622210330.40490-1-sj@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: B5F4F18000D X-Rspamd-Server: rspam10 X-Stat-Signature: e9bwbh9ryqwu6hx1qot7p5u99paoqqh1 X-HE-Tag: 1750626218-993124 X-HE-Meta: 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 mCtbAUif gCaQ4tJ4ipOe4Pm+bip2htxODit7dJhZ1f7/B/i0W+zumKsCTuU/JvfVymL/QwOaGknLlOMfGss7ahx0zUFrx8YACfJLlnhl1yBC+QpA0nxhDTJj91QBDdww34HJDBNOnvZfqLiaeLv2MAhduRgTIk0ZU3UMKybycW/0WDIMAbmH3xkhQRv7gILf+qmb/AqnVVjldUbVGW9mK8a4MZYDLnweYgsEglXF5alyYiGPPJDpwaDs= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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/selftests/damon/Makefile index e888455e3cf8..5b230deb19e8 100644 --- a/tools/testing/selftests/damon/Makefile +++ b/tools/testing/selftests/damon/Makefile @@ -7,6 +7,7 @@ TEST_FILES = _damon_sysfs.py # functionality tests TEST_PROGS += sysfs.sh +TEST_PROGS += sysfs.py TEST_PROGS += sysfs_update_schemes_tried_regions_wss_estimation.py TEST_PROGS += damos_quota.py damos_quota_goal.py damos_apply_interval.py TEST_PROGS += damos_tried_regions.py damon_nr_regions.py diff --git a/tools/testing/selftests/damon/sysfs.py b/tools/testing/selftests/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 = os.path.dirname(os.path.abspath(__file__)) + dump_script = os.path.join(file_dir, 'drgn_dump_damon_status.py') + rc = subprocess.call(['drgn', dump_script, pid, 'damon_dump_output'], + stderr=subprocess.DEVNULL) + if rc != 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 = _damon_sysfs.Kdamonds( + [_damon_sysfs.Kdamond(contexts=[_damon_sysfs.DamonCtx()])]) + err = kdamonds.start() + if err is not None: + print('kdamond start failed: %s' % err) + exit(1) + + status, err = dump_damon_status_dict(kdamonds.kdamonds[0].pid) + if err is not None: + print(err) + exit(1) + + if len(status['contexts']) != 1: + print('number of contexts: %d' % len(status['contexts'])) + exit(1) + kdamonds.stop() + +if __name__ == '__main__': + main() -- 2.39.5