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Mon, 3 Mar 2025 22:17:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1741040260; bh=XpcVMfDACd++qb3Pq98x+XaZ3PfwwLWSEoYntOcOzFw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XfdZWy97nH/eiYY8CQK2C3uoDHTugsPUgNxPosNITPG8ev16imKFJzsHQJ+RnLrm3 uhctjWkLWWpklHpE42SSz1cs1QJhNssM7NnzRx2i7MElFJ3dvRHC7PMSAfJj7ji08X DUOQ6RJnH7/JBEqrmpk2eOqQF9fRck0Jt11ZuVxAs7Eo4d7IVuhn5h+m/qJcKEmEC3 x91GNxG8Rw7F38NSca/3dIR2jfU6Sr8vMxXc0p4WAFuMpIxhVNJOma4+7kTsTmtZX8 TfQ3nt5nW+pmx5q2+TSNfjadw5XsHXvaSBd1NcYZ/K5oxiFYjuEIpDHJOAv5VLqBK8 AvLHkF0doBvHw== From: SeongJae Park To: Andrew Morton Cc: SeongJae Park , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 7/8] Docs/ABI/damon: document intervals auto-tuning ABI Date: Mon, 3 Mar 2025 14:17:25 -0800 Message-Id: <20250303221726.484227-8-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250303221726.484227-1-sj@kernel.org> References: <20250303221726.484227-1-sj@kernel.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: C7948140007 X-Stat-Signature: whrmfedxtmboowdhhp9qih41u86mxy89 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1741040260-731551 X-HE-Meta: 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 zQezM/hi 5rb6u5cGP0EG1I16+mueXNVCsukCCm5KSpooXm7s8RXLC+V/uE7OIS5T4YVsrnA74zjhgEFBywKTXfl2PlldD8xzgw4HGG64CZorvuS3I0tuph7adiivuCdOHVPFS3bf3fHSBzzPdDWzpQwYPcvVVRDvOq/+sVXl0vy+m4w32cGHsMas+moB0Xy79UOeaOaDVf0Eo8wNHSjy2KcYh8kHp4o7ae5V9wMZtG2lFF2viPcsSgV/AwdvdbEJL8f83xDiRkMR4L0lYaA7ZxWg= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000002, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Document the DAMON user-space ABI for DAMON sampling and aggregation intervals auto-tuning. Signed-off-by: SeongJae Park --- .../ABI/testing/sysfs-kernel-mm-damon | 30 +++++++++++++++++++ 1 file changed, 30 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-kernel-mm-damon b/Documentation/ABI/testing/sysfs-kernel-mm-damon index ccd13ca668c8..76da77d7f7b6 100644 --- a/Documentation/ABI/testing/sysfs-kernel-mm-damon +++ b/Documentation/ABI/testing/sysfs-kernel-mm-damon @@ -91,6 +91,36 @@ Description: Writing a value to this file sets the update interval of the DAMON context in microseconds as the value. Reading this file returns the value. +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//monitoring_attrs/intervals/intrvals_goal/access_bp +Date: Feb 2025 +Contact: SeongJae Park +Description: Writing a value to this file sets the monitoring intervals + auto-tuning target DAMON-observed access events ratio within + the given time interval (aggrs in same directory), in bp + (1/10,000). Reading this file returns the value. + +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//monitoring_attrs/intervals/intrvals_goal/aggrs +Date: Feb 2025 +Contact: SeongJae Park +Description: Writing a value to this file sets the time interval to achieve + the monitoring intervals auto-tuning target DAMON-observed + access events ratio (access_bp in same directory) within. + Reading this file returns the value. + +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//monitoring_attrs/intervals/intrvals_goal/min_sample_us +Date: Feb 2025 +Contact: SeongJae Park +Description: Writing a value to this file sets the minimum value of + auto-tuned sampling interval in microseconds. Reading this + file returns the value. + +What: /sys/kernel/mm/damon/admin/kdamonds//contexts//monitoring_attrs/intervals/intrvals_goal/max_sample_us +Date: Feb 2025 +Contact: SeongJae Park +Description: Writing a value to this file sets the maximum value of + auto-tuned sampling interval in microseconds. Reading this + file returns the value. + What: /sys/kernel/mm/damon/admin/kdamonds//contexts//monitoring_attrs/nr_regions/min WDate: Mar 2022