From: SeongJae Park <sj@kernel.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: SeongJae Park <sj@kernel.org>, Jonathan Corbet <corbet@lwn.net>,
damon@lists.linux.dev, linux-mm@kvack.org,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 20/20] Docs/admin-guide/mm/damon/reclaim: document auto-tuning parameters
Date: Mon, 19 Feb 2024 11:44:31 -0800 [thread overview]
Message-ID: <20240219194431.159606-21-sj@kernel.org> (raw)
In-Reply-To: <20240219194431.159606-1-sj@kernel.org>
Update DAMON_RECLAIM usage document for the user/self feedback based
auto-tuning of the quota.
Signed-off-by: SeongJae Park <sj@kernel.org>
---
.../admin-guide/mm/damon/reclaim.rst | 27 +++++++++++++++++++
1 file changed, 27 insertions(+)
diff --git a/Documentation/admin-guide/mm/damon/reclaim.rst b/Documentation/admin-guide/mm/damon/reclaim.rst
index 343e25b252f4..af05ae617018 100644
--- a/Documentation/admin-guide/mm/damon/reclaim.rst
+++ b/Documentation/admin-guide/mm/damon/reclaim.rst
@@ -117,6 +117,33 @@ milliseconds.
1 second by default.
+quota_mem_pressure_us
+---------------------
+
+Desired level of memory pressure-stall time in microseconds.
+
+While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
+increases and decreases the effective level of the quota aiming this level of
+memory pressure is incurred. System-wide ``some`` memory PSI in microseconds
+per quota reset interval (``quota_reset_interval_ms``) is collected and
+compared to this value to see if the aim is satisfied. Value zero means
+disabling this auto-tuning feature.
+
+Disabled by default.
+
+quota_autotune_feedback
+-----------------------
+
+User-specifiable feedback for auto-tuning of the effective quota.
+
+While keeping the caps that set by other quotas, DAMON_RECLAIM automatically
+increases and decreases the effective level of the quota aiming receiving this
+feedback of value ``10,000`` from the user. DAMON_RECLAIM assumes the feedback
+value and the quota are positively proportional. Value zero means disabling
+this auto-tuning feature.
+
+Disabled by default.
+
wmarks_interval
---------------
--
2.39.2
prev parent reply other threads:[~2024-02-19 19:44 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-19 19:44 [PATCH 00/20] mm/damon: let DAMOS feeds and tame/auto-tune itself SeongJae Park
2024-02-19 19:44 ` [PATCH 01/20] mm/damon/core: Set damos_quota->esz as public field and document SeongJae Park
2024-02-19 19:44 ` [PATCH 02/20] mm/damon/sysfs-schemes: implement quota effective_bytes file SeongJae Park
2024-02-19 19:44 ` [PATCH 03/20] mm/damon/sysfs: implement a kdamond command for updating schemes' effective quotas SeongJae Park
2024-02-19 19:44 ` [PATCH 04/20] Docs/ABI/damon: document effective_bytes sysfs file SeongJae Park
2024-02-19 19:44 ` [PATCH 05/20] Docs/admin-guide/mm/damon/usage: document effective_bytes file SeongJae Park
2024-02-19 19:44 ` [PATCH 06/20] mm/damon: move comments and fields for damos-quota-prioritization to the end SeongJae Park
2024-02-19 19:44 ` [PATCH 07/20] mm/damon/core: split out quota goal related fields to a struct SeongJae Park
2024-02-19 19:44 ` [PATCH 08/20] mm/damon/core: add multiple goals per damos_quota and helpers for those SeongJae Park
2024-02-19 19:44 ` [PATCH 09/20] mm/damon/sysfs: use only quota->goals SeongJae Park
2024-02-19 19:44 ` [PATCH 10/20] mm/damon/core: remove ->goal field of damos_quota SeongJae Park
2024-02-19 19:44 ` [PATCH 11/20] mm/damon/core: let goal specified with only target and current values SeongJae Park
2024-02-19 19:44 ` [PATCH 12/20] mm/damon/core: support multiple metrics for quota goal SeongJae Park
2024-02-19 19:44 ` [PATCH 13/20] mm/damon/core: implement PSI metric DAMOS " SeongJae Park
2024-02-19 19:44 ` [PATCH 14/20] mm/damon/sysfs-schemes: support PSI-based quota auto-tune SeongJae Park
2024-02-19 19:44 ` [PATCH 15/20] Docs/mm/damon/design: document quota goal self-tuning SeongJae Park
2024-02-19 19:44 ` [PATCH 16/20] Docs/ABI/damon: document quota goal metric file SeongJae Park
2024-02-19 19:44 ` [PATCH 17/20] Docs/admin-guide/mm/damon/usage: " SeongJae Park
2024-02-19 19:44 ` [PATCH 18/20] mm/damon/reclaim: implement user-feedback driven quota auto-tuning SeongJae Park
2024-02-19 19:44 ` [PATCH 19/20] mm/damon/reclaim: implement memory PSI-driven quota self-tuning SeongJae Park
2024-02-19 19:44 ` SeongJae Park [this message]
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