From patchwork Tue Jun 25 18:05:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: SeongJae Park X-Patchwork-Id: 807359 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 3945D17BB3C; Tue, 25 Jun 2024 18:05:47 +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=1719338747; cv=none; b=MZ4YTCksAIvGreg1yE818O7hi2QZly4Lq5yrN/vBLPlRSUwayhCHxYBWIp0W5xUihRFXWDFzh+EOyJO8zGNt/4PMHYeQO0ISr2lCqtJncKnGzZlzzOm1knpWz2A5HZTn4okgmhVwLPBC/GelShZvZ1PQTRpnEAdb0syh8WR1lQ0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719338747; c=relaxed/simple; bh=IuEbQPKkXzrPZK6YAlgDSnlBOl1pA1OTrf32W27fHRY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YecqTQ9kijv8d1rAh+8Dl9vBUa/X5u5Mx7O+isIGAYGxnZL00jtjBlAtxcRcqqS/SZvO6XtEVpz1eAzkSqFcFi0Vyamz1hFAQDvPbC55GxlVnzmXW1xhdIb+zWeHPojge+ZbOTjxAsz+t3i+K9spSLHrq+WujtlZqpMj/vgE5fE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YZW6FvAs; 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="YZW6FvAs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 934D2C32781; Tue, 25 Jun 2024 18:05:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719338747; bh=IuEbQPKkXzrPZK6YAlgDSnlBOl1pA1OTrf32W27fHRY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YZW6FvAsRy1TtK+Ximbxp4cNzEldF+GHKTE6xKDuX6ScVnrZC1O8tsgfOX9GYoVHZ Eqm1ERLccOip5xxxXx6epCVzX+wTcpualFf28d5l4MKI4QRCrCSzencV60QSGuBLOi 7Csl0c8aIY5TAC73Z4Wdb7lqxJ41hE6H1JselBoSUR8yntWrvIXHcjkXmwhX3V7zYr IunlcjQV6pwFuLTJyuegnSY1bux56hSnFNF7v7c2Au875//9QNeWKzB8v0JRYK+fzN il/nYtFa5C4OqrzlY9CqCeCB3aCOwpYpw7cRrZNshhmbRZISGsFW/9yCXEa7HUxtmM OIDlfa3WmwD9Q== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Shuah Khan , damon@lists.linux.dev, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 4/8] selftests/damon: implement DAMOS tried regions test Date: Tue, 25 Jun 2024 11:05:34 -0700 Message-Id: <20240625180538.73134-5-sj@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240625180538.73134-1-sj@kernel.org> References: <20240625180538.73134-1-sj@kernel.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Implement a test for DAMOS tried regions command of DAMON sysfs interface. It ensures the expected number of monitoring regions are created using an artificial memory access pattern generator program. Signed-off-by: SeongJae Park --- tools/testing/selftests/damon/Makefile | 1 + .../selftests/damon/damos_tried_regions.py | 65 +++++++++++++++++++ 2 files changed, 66 insertions(+) create mode 100644 tools/testing/selftests/damon/damos_tried_regions.py diff --git a/tools/testing/selftests/damon/Makefile b/tools/testing/selftests/damon/Makefile index 7b972b5cf487..356b4e9a515d 100644 --- a/tools/testing/selftests/damon/Makefile +++ b/tools/testing/selftests/damon/Makefile @@ -13,6 +13,7 @@ TEST_PROGS = debugfs_attrs.sh debugfs_schemes.sh debugfs_target_ids.sh TEST_PROGS += sysfs.sh 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 TEST_PROGS += reclaim.sh lru_sort.sh # regression tests (reproducers of previously found bugs) diff --git a/tools/testing/selftests/damon/damos_tried_regions.py b/tools/testing/selftests/damon/damos_tried_regions.py new file mode 100644 index 000000000000..3b347eb28bd2 --- /dev/null +++ b/tools/testing/selftests/damon/damos_tried_regions.py @@ -0,0 +1,65 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 + +import subprocess +import time + +import _damon_sysfs + +def main(): + # repeatedly access even-numbered ones in 14 regions of 10 MiB size + sz_region = 10 * 1024 * 1024 + proc = subprocess.Popen(['./access_memory_even', '14', '%d' % sz_region]) + + # stat every monitored regions + kdamonds = _damon_sysfs.Kdamonds([_damon_sysfs.Kdamond( + contexts=[_damon_sysfs.DamonCtx( + ops='vaddr', + targets=[_damon_sysfs.DamonTarget(pid=proc.pid)], + schemes=[_damon_sysfs.Damos(action='stat', + )] # schemes + )] # contexts + )]) # kdamonds + + err = kdamonds.start() + if err is not None: + proc.terminate() + print('kdamond start failed: %s' % err) + exit(1) + + collected_nr_regions = [] + while proc.poll() is None: + time.sleep(0.1) + err = kdamonds.kdamonds[0].update_schemes_tried_regions() + if err is not None: + proc.terminate() + print('tried regions update failed: %s' % err) + exit(1) + + scheme = kdamonds.kdamonds[0].contexts[0].schemes[0] + if scheme.tried_regions is None: + proc.terminate() + print('tried regions is not collected') + exit(1) + + nr_tried_regions = len(scheme.tried_regions) + if nr_tried_regions <= 0: + proc.terminate() + print('tried regions is not created') + exit(1) + collected_nr_regions.append(nr_tried_regions) + if len(collected_nr_regions) > 10: + break + proc.terminate() + + collected_nr_regions.sort() + sample = collected_nr_regions[4] + print('50-th percentile nr_regions: %d' % sample) + print('expectation (>= 14) is %s' % 'met' if sample >= 14 else 'not met') + if collected_nr_regions[4] < 14: + print('full nr_regions:') + print('\n'.join(collected_nr_regions)) + exit(1) + +if __name__ == '__main__': + main()