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Docs/ABI/damon: document intervals auto-tuning ABI

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Document the DAMON user-space ABI for DAMON sampling and aggregation
intervals auto-tuning.

Link: https://lkml.kernel.org/r/20250303221726.484227-8-sj@kernel.org
Signed-off-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
SeongJae Park
2025-03-03 14:17:25 -08:00
committed by Andrew Morton
parent af03edb521
commit e2b23dc623
1 changed files with 30 additions and 0 deletions
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Documentation/ABI/testing/sysfs-kernel-mm-damon
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@@ -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 DAMON context in microseconds as the value. Reading this file
returns the value. returns the value.
What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/access_bp
Date: Feb 2025
Contact: SeongJae Park <sj@kernel.org>
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/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/aggrs
Date: Feb 2025
Contact: SeongJae Park <sj@kernel.org>
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/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/min_sample_us
Date: Feb 2025
Contact: SeongJae Park <sj@kernel.org>
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/<K>/contexts/<C>/monitoring_attrs/intervals/intrvals_goal/max_sample_us
Date: Feb 2025
Contact: SeongJae Park <sj@kernel.org>
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/<K>/contexts/<C>/monitoring_attrs/nr_regions/min What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/nr_regions/min
WDate: Mar 2022 WDate: Mar 2022