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authorSeongJae Park <sj@kernel.org>2022-01-15 01:10:08 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-15 17:30:32 +0300
commit4492bf452af532493b6591d2e090a0f8f7c11674 (patch)
tree8c3d3fd71980ba5896886f9e9f5a6f96ef314b52 /Documentation/admin-guide/mm
parent35b43d4092008ad33d3bcccee4b262ffbf8a551c (diff)
downloadlinux-4492bf452af532493b6591d2e090a0f8f7c11674.tar.xz
Docs/admin-guide/mm/damon/usage: mention tracepoint at the beginning
To get detailed monitoring results from the user space, users need to use the damon_aggregated tracepoint. This commit adds a brief mention of it at the beginning of the usage document. Link: https://lkml.kernel.org/r/20211209131806.19317-5-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> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/admin-guide/mm')
-rw-r--r--Documentation/admin-guide/mm/damon/usage.rst9
1 files changed, 8 insertions, 1 deletions
diff --git a/Documentation/admin-guide/mm/damon/usage.rst b/Documentation/admin-guide/mm/damon/usage.rst
index 24137312f601..846c85bf4b9d 100644
--- a/Documentation/admin-guide/mm/damon/usage.rst
+++ b/Documentation/admin-guide/mm/damon/usage.rst
@@ -21,7 +21,10 @@ DAMON provides below three interfaces for different users.
you can write and use your personalized DAMON debugfs wrapper programs that
reads/writes the debugfs files instead of you. The `DAMON user space tool
<https://github.com/awslabs/damo>`_ is one example of such programs. It
- supports both virtual and physical address spaces monitoring.
+ supports both virtual and physical address spaces monitoring. Note that this
+ interface provides only simple :ref:`statistics <damos_stats>` for the
+ monitoring results. For detailed monitoring results, DAMON provides a
+ :ref:`tracepoint <tracepoint>`.
- *Kernel Space Programming Interface.*
:doc:`This </vm/damon/api>` is for kernel space programmers. Using this,
users can utilize every feature of DAMON most flexibly and efficiently by
@@ -215,6 +218,8 @@ If the value is higher than ``<high mark>`` or lower than ``<low mark>``, the
scheme is deactivated. If the value is lower than ``<mid mark>``, the scheme
is activated.
+.. _damos_stats:
+
Statistics
~~~~~~~~~~
@@ -268,6 +273,8 @@ the monitoring is turned on. If you write to the files while DAMON is running,
an error code such as ``-EBUSY`` will be returned.
+.. _tracepoint:
+
Tracepoint for Monitoring Results
=================================