From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31130C433E0 for ; Mon, 6 Jul 2020 11:54:07 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D163F20724 for ; Mon, 6 Jul 2020 11:54:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=amazon.com header.i=@amazon.com header.b="OtwYYz6m" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D163F20724 Authentication-Results: mail.kernel.org; dmarc=fail (p=quarantine dis=none) header.from=amazon.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 624906B0006; Mon, 6 Jul 2020 07:54:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 5AC776B0007; Mon, 6 Jul 2020 07:54:06 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 427AC6B0008; Mon, 6 Jul 2020 07:54:06 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0106.hostedemail.com [216.40.44.106]) by kanga.kvack.org (Postfix) with ESMTP id 276C76B0006 for ; Mon, 6 Jul 2020 07:54:06 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 9888C180AD80F for ; Mon, 6 Jul 2020 11:54:05 +0000 (UTC) X-FDA: 77007492450.21.crate17_5a0de4526eab Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin21.hostedemail.com (Postfix) with ESMTP id 75E6E180442C0 for ; Mon, 6 Jul 2020 11:54:05 +0000 (UTC) X-HE-Tag: crate17_5a0de4526eab X-Filterd-Recvd-Size: 17283 Received: from smtp-fw-9102.amazon.com (smtp-fw-9102.amazon.com [207.171.184.29]) by imf44.hostedemail.com (Postfix) with ESMTP for ; Mon, 6 Jul 2020 11:54:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazon201209; t=1594036445; x=1625572445; h=from:to:cc:subject:date:message-id:mime-version; bh=7CCCJI5bWc3IFULK9x+lPB+/AvJyV7/EwD9FEoTKo9g=; b=OtwYYz6mQ+PvYLWhlHVYQRDWT/laXg6Ue2kFCkyGC04tB/q7Y6L/FH5F nInUYV+5yKno9oHo5wp+vPi8D/PghZY5kR6SFD1ZOfolwluFkLzTvD3ei V4clAW7qI/mDhP6o5M/dndUd4qaQ2omOmzlBzpaDGLIjjjB+Kl0VqOqJg 8=; IronPort-SDR: Cp6DN1gM2aP1d3sUkvM+Kpqo8jDu3ZZXEgxFDbiSkMKTWEpuHfCRSTjmpk3aUAUM4V1mDewS7Y V3ZDJDl9dITw== X-IronPort-AV: E=Sophos;i="5.75,318,1589241600"; d="scan'208";a="57623402" Received: from sea32-co-svc-lb4-vlan3.sea.corp.amazon.com (HELO email-inbound-relay-2a-d0be17ee.us-west-2.amazon.com) ([10.47.23.38]) by smtp-border-fw-out-9102.sea19.amazon.com with ESMTP; 06 Jul 2020 11:53:59 +0000 Received: from EX13MTAUEA002.ant.amazon.com (pdx4-ws-svc-p6-lb7-vlan3.pdx.amazon.com [10.170.41.166]) by email-inbound-relay-2a-d0be17ee.us-west-2.amazon.com (Postfix) with ESMTPS id E4F94A185D; Mon, 6 Jul 2020 11:53:56 +0000 (UTC) Received: from EX13D31EUA004.ant.amazon.com (10.43.165.161) by EX13MTAUEA002.ant.amazon.com (10.43.61.77) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 6 Jul 2020 11:53:56 +0000 Received: from u886c93fd17d25d.ant.amazon.com (10.43.160.100) by EX13D31EUA004.ant.amazon.com (10.43.165.161) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 6 Jul 2020 11:53:40 +0000 From: SeongJae Park To: CC: SeongJae Park , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v17 00/15] Introduce Data Access MONitor (DAMON) Date: Mon, 6 Jul 2020 13:53:07 +0200 Message-ID: <20200706115322.29598-1-sjpark@amazon.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.43.160.100] X-ClientProxiedBy: EX13D21UWA003.ant.amazon.com (10.43.160.184) To EX13D31EUA004.ant.amazon.com (10.43.165.161) X-Rspamd-Queue-Id: 75E6E180442C0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 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: From: SeongJae Park Changes from Previous Version ============================= - Wordsmith/cleanup the documentations and the code - user space tool: Cleanup and add an option for reuse histogram (patch 11) - recording: Check disablement condition properly - recording: Force minimal recording buffer size (1KB) Introduction ============ DAMON is a data access monitoring framework subsystem for the Linux kernel. The core mechanisms of DAMON called 'region based sampling' and 'adaptive regions adjustment' (refer to 'mechanisms.rst' in the 11th patch of this patchset for the detail) make it - accurate (The monitored information is useful for DRAM level memory management. It might not appropriate for Cache-level accuracy, though.), - light-weight (The monitoring overhead is low enough to be applied online while making no impact on the performance of the target workloads.), and - scalable (the upper-bound of the instrumentation overhead is controllable regardless of the size of target workloads.). Using this framework, therefore, the kernel's core memory management mechanisms such as reclamation and THP can be optimized for better memory management. The experimental memory management optimization works that incurring high instrumentation overhead will be able to have another try. In user space, meanwhile, users who have some special workloads will be able to write personalized tools or applications for deeper understanding and specialized optimizations of their systems. Evaluations =========== We evaluated DAMON's overhead, monitoring quality and usefulness using 25 realistic workloads on my QEMU/KVM based virtual machine running a kernel that v16 DAMON patchset is applied. DAMON is lightweight. It increases system memory usage by only -0.25% and consumes less than 1% CPU time in most case. It slows target workloads down by only 0.94%. DAMON is accurate and useful for memory management optimizations. An experimental DAMON-based operation scheme for THP, 'ethp', removes 31.29% of THP memory overheads while preserving 60.64% of THP speedup. Another experimental DAMON-based 'proactive reclamation' implementation, 'prcl', reduces 87.95% of residential sets and 29.52% of system memory footprint while incurring only 2.15% runtime overhead in the best case (parsec3/freqmine). NOTE that the experimentail THP optimization and proactive reclamation are not for production, just only for proof of concepts. Please refer to the official document[1] or "Documentation/admin-guide/mm: Add a document for DAMON" patch in this patchset for detailed evaluation setup and results. [1] https://damonitor.github.io/doc/html/latest-damon/admin-guide/mm/damon/eval.html More Information ================ We prepared a showcase web site[1] that you can get more information. There are - the official documentations[2], - the heatmap format dynamic access pattern of various realistic workloads for heap area[3], mmap()-ed area[4], and stack[5] area, - the dynamic working set size distribution[6] and chronological working set size changes[7], and - the latest performance test results[8]. [1] https://damonitor.github.io/_index [2] https://damonitor.github.io/doc/html/latest-damon [3] https://damonitor.github.io/test/result/visual/latest/rec.heatmap.0.png.html [4] https://damonitor.github.io/test/result/visual/latest/rec.heatmap.1.png.html [5] https://damonitor.github.io/test/result/visual/latest/rec.heatmap.2.png.html [6] https://damonitor.github.io/test/result/visual/latest/rec.wss_sz.png.html [7] https://damonitor.github.io/test/result/visual/latest/rec.wss_time.png.html [8] https://damonitor.github.io/test/result/perf/latest/html/index.html Baseline and Complete Git Trees =============================== The patches are based on the v5.7. You can also clone the complete git tree: $ git clone git://github.com/sjp38/linux -b damon/patches/v17 The web is also available: https://github.com/sjp38/linux/releases/tag/damon/patches/v17 There are a couple of trees for entire DAMON patchset series. It includes future features. The first one[1] contains the changes for latest release, while the other one[2] contains the changes for next release. [1] https://github.com/sjp38/linux/tree/damon/master [2] https://github.com/sjp38/linux/tree/damon/next Sequence Of Patches =================== The 1st patch exports 'lookup_page_ext()' to GPL modules so that it can be used by DAMON even though it is built as a loadable module. Next four patches implement the target address space independent core logics of DAMON and it's programming interface. The 2nd patch introduces DAMON module, it's data structures, and data structure related common functions. Following three patches (3rd to 5th) implements the core mechanisms of DAMON, namely regions based sampling (patch 3), adaptive regions adjustment (patch 4), and dynamic memory mapping chage adoption (patch 5). The following one (patch 6) implements the virtual memory address space specific functions. Following four patches are for more user friendly interfaces. The 7th patch implements recording of access patterns in DAMON. Each of next two patches (8th and 9th) respectively adds a tracepoint for other tracepoints supporting tracers such as perf, and a debugfs interface for privileged people and/or programs in user space. Three patches for high level users of DAMON follows. To provide a minimal reference to the debugfs interface and for high level use/tests of the DAMON, the next patch (10th) implements an user space tool. The 11th patch adds one more option to the tool for reuse histogram plot. The 12nd patch adds a document for administrators of DAMON. Next two patches are for tests. The 13th patch provides unit tests (based on the kunit) while the 14th patch adds user space tests (based on the kselftest). Finally, the last patch (15th) updates the MAINTAINERS file. Patch History ============= This version of patchset merges first, second, and sixth patches in the CDAMON patchset[1] for better readability. As the changes are not subtle, 'Reviewed-by's I previously received on the changes affected patches are also dropped. [1] https://lore.kernel.org/linux-mm/20200609141941.19184-1-sjpark@amazon.com/ Changes from v16 (https://lore.kernel.org/linux-mm/20200615161927.12637-1-sjpark@amazon.com/) - Wordsmith/cleanup the documentations and the code - user space tool: Simplify the code and add wss option for reuse histogram - recording: Check disablement condition properly - recording: Force minimal recording buffer size (1KB) Changes from v15 (https://lore.kernel.org/linux-mm/20200608114047.26589-1-sjpark@amazon.com/) - Refine commit messages (David Hildenbrand) - Optimizes three vma regions search (Varad Gautam) - Support static granularity monitoring (Shakeel Butt) - Cleanup code and re-organize the sequence of patches Changes from v14 (https://lore.kernel.org/linux-mm/20200602130125.20467-1-sjpark@amazon.com/) - Directly pass region and task to tracepoint (Steven Rostedt) - Refine comments for better read - Add more 'Reviewed-by's (Leonard Foerster, Brendan Higgins) Changes from v13 (https://lore.kernel.org/linux-mm/20200525091512.30391-1-sjpark@amazon.com/) - Fix a typo (Leonard Foerster) - Fix wring condition of three sub ranges split (Leonard Foerster) - Rebase on v5.7 Changes from v12 (https://lore.kernel.org/linux-mm/20200518100018.2293-1-sjpark@amazon.com/) - Avoid races between debugfs readers and writers - Add kernel-doc comments in damon.h Changes from v11 (https://lore.kernel.org/linux-mm/20200511123302.12520-1-sjpark@amazon.com/) - Rewrite the document (Stefan Nuernberger) - Make 'damon_for_each_*' argument order consistent (Leonard Foerster) - Fix wrong comment in 'kdamond_merge_regions()' (Leonard Foerster) Changes from v10 (https://lore.kernel.org/linux-mm/20200505110815.10532-1-sjpark@amazon.com/) - Reduce aggressive split overhead by doing it only if required Changes from v9 (https://lore.kernel.org/linux-mm/20200427120442.24179-1-sjpark@amazon.com/) - Split each region into 4 subregions if possible (Jonathan Cameraon) - Update kunit test for the split code change Please refer to the v9 patchset to get older history. SeongJae Park (15): mm/page_ext: Export lookup_page_ext() to GPL modules mm: Introduce Data Access MONitor (DAMON) mm/damon: Implement region based sampling mm/damon: Adaptively adjust regions mm/damon: Track dynamic monitoring target regions update mm/damon: Implement callbacks for the virtual memory address spaces mm/damon: Implement access pattern recording mm/damon: Add a tracepoint mm/damon: Implement a debugfs interface tools: Introduce a minimal user-space tool for DAMON tools/damon/wss: Implement '--thres' option Documentation/admin-guide/mm: Add a document for DAMON mm/damon: Add kunit tests mm/damon: Add user space selftests MAINTAINERS: Update for DAMON Documentation/admin-guide/mm/damon/api.rst | 20 + .../admin-guide/mm/damon/damon_heatmap.png | Bin 0 -> 8366 bytes .../admin-guide/mm/damon/damon_wss_change.png | Bin 0 -> 7211 bytes .../admin-guide/mm/damon/damon_wss_dist.png | Bin 0 -> 6173 bytes Documentation/admin-guide/mm/damon/eval.rst | 222 +++ Documentation/admin-guide/mm/damon/faq.rst | 59 + .../admin-guide/mm/damon/freqmine_heatmap.png | Bin 0 -> 9999 bytes .../admin-guide/mm/damon/freqmine_wss_sz.png | Bin 0 -> 5589 bytes .../mm/damon/freqmine_wss_time.png | Bin 0 -> 6550 bytes Documentation/admin-guide/mm/damon/guide.rst | 194 ++ Documentation/admin-guide/mm/damon/index.rst | 35 + .../admin-guide/mm/damon/mechanisms.rst | 159 ++ Documentation/admin-guide/mm/damon/plans.rst | 29 + Documentation/admin-guide/mm/damon/start.rst | 117 ++ .../mm/damon/streamcluster_heatmap.png | Bin 0 -> 42210 bytes .../mm/damon/streamcluster_wss_sz.png | Bin 0 -> 6327 bytes .../mm/damon/streamcluster_wss_time.png | Bin 0 -> 8830 bytes Documentation/admin-guide/mm/damon/usage.rst | 296 +++ Documentation/admin-guide/mm/index.rst | 1 + MAINTAINERS | 12 + include/linux/damon.h | 175 ++ include/trace/events/damon.h | 43 + mm/Kconfig | 23 + mm/Makefile | 1 + mm/damon-test.h | 661 +++++++ mm/damon.c | 1632 +++++++++++++++++ mm/page_ext.c | 1 + tools/damon/.gitignore | 1 + tools/damon/_damon.py | 129 ++ tools/damon/_dist.py | 36 + tools/damon/_recfile.py | 23 + tools/damon/bin2txt.py | 67 + tools/damon/damo | 37 + tools/damon/heats.py | 362 ++++ tools/damon/nr_regions.py | 91 + tools/damon/record.py | 106 ++ tools/damon/report.py | 45 + tools/damon/wss.py | 99 + tools/testing/selftests/damon/Makefile | 7 + .../selftests/damon/_chk_dependency.sh | 28 + tools/testing/selftests/damon/_chk_record.py | 108 ++ .../testing/selftests/damon/debugfs_attrs.sh | 139 ++ .../testing/selftests/damon/debugfs_record.sh | 50 + 43 files changed, 5008 insertions(+) create mode 100644 Documentation/admin-guide/mm/damon/api.rst create mode 100644 Documentation/admin-guide/mm/damon/damon_heatmap.png create mode 100644 Documentation/admin-guide/mm/damon/damon_wss_change.png create mode 100644 Documentation/admin-guide/mm/damon/damon_wss_dist.png create mode 100644 Documentation/admin-guide/mm/damon/eval.rst create mode 100644 Documentation/admin-guide/mm/damon/faq.rst create mode 100644 Documentation/admin-guide/mm/damon/freqmine_heatmap.png create mode 100644 Documentation/admin-guide/mm/damon/freqmine_wss_sz.png create mode 100644 Documentation/admin-guide/mm/damon/freqmine_wss_time.png create mode 100644 Documentation/admin-guide/mm/damon/guide.rst create mode 100644 Documentation/admin-guide/mm/damon/index.rst create mode 100644 Documentation/admin-guide/mm/damon/mechanisms.rst create mode 100644 Documentation/admin-guide/mm/damon/plans.rst create mode 100644 Documentation/admin-guide/mm/damon/start.rst create mode 100644 Documentation/admin-guide/mm/damon/streamcluster_heatmap.png create mode 100644 Documentation/admin-guide/mm/damon/streamcluster_wss_sz.png create mode 100644 Documentation/admin-guide/mm/damon/streamcluster_wss_time.png create mode 100644 Documentation/admin-guide/mm/damon/usage.rst create mode 100644 include/linux/damon.h create mode 100644 include/trace/events/damon.h create mode 100644 mm/damon-test.h create mode 100644 mm/damon.c create mode 100644 tools/damon/.gitignore create mode 100644 tools/damon/_damon.py create mode 100644 tools/damon/_dist.py create mode 100644 tools/damon/_recfile.py create mode 100644 tools/damon/bin2txt.py create mode 100755 tools/damon/damo create mode 100644 tools/damon/heats.py create mode 100644 tools/damon/nr_regions.py create mode 100644 tools/damon/record.py create mode 100644 tools/damon/report.py create mode 100644 tools/damon/wss.py create mode 100644 tools/testing/selftests/damon/Makefile create mode 100644 tools/testing/selftests/damon/_chk_dependency.sh create mode 100644 tools/testing/selftests/damon/_chk_record.py create mode 100755 tools/testing/selftests/damon/debugfs_attrs.sh create mode 100755 tools/testing/selftests/damon/debugfs_record.sh -- 2.17.1