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Diffstat (limited to 'Documentation/mm/damon/design.rst')
| -rw-r--r-- | Documentation/mm/damon/design.rst | 25 |
1 files changed, 17 insertions, 8 deletions
diff --git a/Documentation/mm/damon/design.rst b/Documentation/mm/damon/design.rst index 80354f4f42ba..2d8d8ca1e0a3 100644 --- a/Documentation/mm/damon/design.rst +++ b/Documentation/mm/damon/design.rst @@ -381,8 +381,8 @@ That is, assumes 4% (20% of 20%) DAMON-observed access events ratio (source) to capture 64% (80% multipled by 80%) real access events (outcomes). To know how user-space can use this feature via :ref:`DAMON sysfs interface -<sysfs_interface>`, refer to :ref:`intervals_goal <sysfs_scheme>` part of -the documentation. +<sysfs_interface>`, refer to :ref:`intervals_goal +<damon_usage_sysfs_monitoring_intervals_goal>` part of the documentation. .. _damon_design_damos: @@ -564,9 +564,9 @@ aggressiveness (the quota) of the corresponding scheme. For example, if DAMOS is under achieving the goal, DAMOS automatically increases the quota. If DAMOS is over achieving the goal, it decreases the quota. -The goal can be specified with four parameters, namely ``target_metric``, -``target_value``, ``current_value`` and ``nid``. The auto-tuning mechanism -tries to make ``current_value`` of ``target_metric`` be same to +The goal can be specified with five parameters, namely ``target_metric``, +``target_value``, ``current_value``, ``nid`` and ``path``. The auto-tuning +mechanism tries to make ``current_value`` of ``target_metric`` be same to ``target_value``. - ``user_input``: User-provided value. Users could use any metric that they @@ -581,9 +581,18 @@ tries to make ``current_value`` of ``target_metric`` be same to set by users at the initial time. In other words, DAMOS does self-feedback. - ``node_mem_used_bp``: Specific NUMA node's used memory ratio in bp (1/10,000). - ``node_mem_free_bp``: Specific NUMA node's free memory ratio in bp (1/10,000). - -``nid`` is optionally required for only ``node_mem_used_bp`` and -``node_mem_free_bp`` to point the specific NUMA node. +- ``node_memcg_used_bp``: Specific cgroup's node used memory ratio for a + specific NUMA node, in bp (1/10,000). +- ``node_memcg_free_bp``: Specific cgroup's node unused memory ratio for a + specific NUMA node, in bp (1/10,000). + +``nid`` is optionally required for only ``node_mem_used_bp``, +``node_mem_free_bp``, ``node_memcg_used_bp`` and ``node_memcg_free_bp`` to +point the specific NUMA node. + +``path`` is optionally required for only ``node_memcg_used_bp`` and +``node_memcg_free_bp`` to point the path to the cgroup. The value should be +the path of the memory cgroup from the cgroups mount point. To know how user-space can set the tuning goal metric, the target value, and/or the current value via :ref:`DAMON sysfs interface <sysfs_interface>`, refer to |