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Fri, 28 Feb 2025 22:03:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740780222; bh=B70HmhIJO7Eh/CP1TQGw5euMpvWBGHv7eOKxBRU5Z5w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IwbR1DRqnyn+hhaN7l8cEj7lEPg+iYG8BDSQFmBJ0uc5SgEbwpsfOS+vQ3X/N1P1R FKmdUpSI67JyQy+A6WTma7/nvUtqicF4UABpFa5V2aeuOVDBdxHivm37a2hKwqw4nt tKW2Qh5r9agqTfUF/0H0Setjo1SPsIUDp17vQTZC22SXxEP/XAtHHcShJhgcJhmkSd bgKtbzzJEiOgwK4tdCnrNEXwkLnOfK8IGDTi4B0YG3Ayqn/eOwxQWp3rTXmT47E9yj KsSbhVijI3bcFHkr6kiWd0oGvVZ+s1K/E+5J/WO78bPVdZxxbSFxfmGqL6HC0aU82H 7/ZFu9VMp1Tvg== From: SeongJae Park To: Cc: SeongJae Park , Andrew Morton , damon@lists.linux.dev, kernel-team@meta.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [RFC PATCH v2 7/8] Docs/ABI/damon: document intervals auto-tuning ABI Date: Fri, 28 Feb 2025 14:03:27 -0800 Message-Id: <20250228220328.49438-8-sj@kernel.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250228220328.49438-1-sj@kernel.org> References: <20250228220328.49438-1-sj@kernel.org> MIME-Version: 1.0 X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 9581F40012 X-Rspam-User: X-Stat-Signature: 5sdeeq7xs53xocaafe7uwdi6gr1j35x9 X-HE-Tag: 1740780223-552232 X-HE-Meta: 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 0FB4Bylh bz3pkADEbrwFR/b2Uq4cJ9dpoRwArnsEqE+3jQYODGts5WynVWIGFsuoceVrlROhQlsnoe/Ojjs+2YdzScj3LE6KSzPxOtWCeeDk9+WddOZHrDc+KdaGi/9OdccQ+wUGbLXqLkOhYP0uKVbDZ8DzwInBiH1Iumn71fiaK1zUZRPzS4ePS75i9ORhLGxXZ/cpxw47DCxPWscKkbyJj+AQ5rGSiO3hBdalV488F5gfYW17FTmG+ScB8xcsqyF+9bqEA0s7Tv0WK4uvkeAI= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000010, 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 9666074f06f3..293197f180ad 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