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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92569EB64DD for ; Fri, 28 Jul 2023 20:18:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233767AbjG1USc (ORCPT ); Fri, 28 Jul 2023 16:18:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36022 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233735AbjG1USb (ORCPT ); Fri, 28 Jul 2023 16:18:31 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C07F24487; Fri, 28 Jul 2023 13:18:29 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A263B621F3; Fri, 28 Jul 2023 20:18:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91E1BC433CA; Fri, 28 Jul 2023 20:18:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1690575509; bh=yEbF4+MD2fwxwTT+Hga32t2Dr/eR/mptRKFvKfgNyUo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WDJUz30ZehPsXA+PQlXSm9ldhk+fPDLca0I+OUG/yn3vxepk0mbOOs2+GH/ZLVgH9 idSbNzHHPgRSd+wZmFUG5A4pMJ9xHp5IqXtfaMPxw7Nw9L1lNa1zDqNV+aKEWrzb8E SpKo4kEuErqGFwO7SQgmuh+u8bXDBqdIvDPCYxKX6SvpNHL6Tk3v1/R12mIXf3KnZU Q0lwrt0sVWMLxDpK7V0LGTQjb/CFLs3nG2e+LYXeiLf2AbeTn2AcPon1z/CCsEQubS pvh07PquPFmXHGk8+pCbivFx3M0GZqW177OkD5L/twoxcbMh2BbtU2zFuCZEGvX8KH 4jU15BTtd3P7A== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , Jonathan Corbet , damon@lists.linux.dev, linux-mm@kvack.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 5/5] Docs/admin-guide/mm/damon/usage: update for tried_regions/total_bytes Date: Fri, 28 Jul 2023 20:18:17 +0000 Message-Id: <20230728201817.70602-6-sj@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230728201817.70602-1-sj@kernel.org> References: <20230728201817.70602-1-sj@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org Update the DAMON usage document for newly added schemes/.../tried_regions/total_bytes file and the update_schemes_tried_bytes command. Signed-off-by: SeongJae Park --- Documentation/admin-guide/mm/damon/usage.rst | 42 +++++++++++++------- 1 file changed, 27 insertions(+), 15 deletions(-) diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst index 2d495fa85a0e..1859dd6c3834 100644 --- a/Documentation/admin-guide/mm/damon/usage.rst +++ b/Documentation/admin-guide/mm/damon/usage.rst @@ -87,7 +87,7 @@ comma (","). :: │ │ │ │ │ │ │ filters/nr_filters │ │ │ │ │ │ │ │ 0/type,matching,memcg_id │ │ │ │ │ │ │ stats/nr_tried,sz_tried,nr_applied,sz_applied,qt_exceeds - │ │ │ │ │ │ │ tried_regions/ + │ │ │ │ │ │ │ tried_regions/total_bytes │ │ │ │ │ │ │ │ 0/start,end,nr_accesses,age │ │ │ │ │ │ │ │ ... │ │ │ │ │ │ ... @@ -127,14 +127,18 @@ in the state. Writing ``commit`` to the ``state`` file makes kdamond reads the user inputs in the sysfs files except ``state`` file again. Writing ``update_schemes_stats`` to ``state`` file updates the contents of stats files for each DAMON-based operation scheme of the kdamond. For details of the -stats, please refer to :ref:`stats section `. Writing -``update_schemes_tried_regions`` to ``state`` file updates the DAMON-based -operation scheme action tried regions directory for each DAMON-based operation -scheme of the kdamond. Writing ``clear_schemes_tried_regions`` to ``state`` -file clears the DAMON-based operating scheme action tried regions directory for -each DAMON-based operation scheme of the kdamond. For details of the -DAMON-based operation scheme action tried regions directory, please refer to -:ref:`tried_regions section `. +stats, please refer to :ref:`stats section `. + +Writing ``update_schemes_tried_regions`` to ``state`` file updates the +DAMON-based operation scheme action tried regions directory for each +DAMON-based operation scheme of the kdamond. Writing +``update_schemes_tried_bytes`` to ``state`` file updates only +``.../tried_regions/total_bytes`` files. Writing +``clear_schemes_tried_regions`` to ``state`` file clears the DAMON-based +operating scheme action tried regions directory for each DAMON-based operation +scheme of the kdamond. For details of the DAMON-based operation scheme action +tried regions directory, please refer to :ref:`tried_regions section +`. If the state is ``on``, reading ``pid`` shows the pid of the kdamond thread. @@ -406,13 +410,21 @@ stats by writing a special keyword, ``update_schemes_stats`` to the relevant schemes//tried_regions/ -------------------------- +This directory initially has one file, ``total_bytes``. + When a special keyword, ``update_schemes_tried_regions``, is written to the -relevant ``kdamonds//state`` file, DAMON creates directories named integer -starting from ``0`` under this directory. Each directory contains files -exposing detailed information about each of the memory region that the -corresponding scheme's ``action`` has tried to be applied under this directory, -during next :ref:`aggregation interval `. The -information includes address range, ``nr_accesses``, and ``age`` of the region. +relevant ``kdamonds//state`` file, DAMON updates the ``total_bytes`` file so +that reading it returns the total size of the scheme tried regions, and creates +directories named integer starting from ``0`` under this directory. Each +directory contains files exposing detailed information about each of the memory +region that the corresponding scheme's ``action`` has tried to be applied under +this directory, during next :ref:`aggregation interval +`. The information includes address range, +``nr_accesses``, and ``age`` of the region. + +Writing ``update_schemes_tried_bytes`` to the relevant ``kdamonds//state`` +file will only update the ``total_bytes`` file, and will not create the +subdirectories. The directories will be removed when another special keyword, ``clear_schemes_tried_regions``, is written to the relevant -- 2.25.1