| what: /sys/kernel/mm/damon/ |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Interface for Data Access MONitoring (DAMON). Contains files |
| for controlling DAMON. For more details on DAMON itself, |
| please refer to Documentation/admin-guide/mm/damon/index.rst. |
| |
| What: /sys/kernel/mm/damon/admin/ |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Interface for privileged users of DAMON. Contains files for |
| controlling DAMON that aimed to be used by privileged users. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/nr_kdamonds |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for controlling each DAMON worker thread (kdamond) |
| named '0' to 'N-1' under the kdamonds/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/state |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing 'on' or 'off' to this file makes the kdamond starts or |
| stops, respectively. Reading the file returns the keywords |
| based on the current status. Writing 'commit' to this file |
| makes the kdamond reads the user inputs in the sysfs files |
| except 'state' again. Writing 'commit_schemes_quota_goals' to |
| this file makes the kdamond reads the quota goal files again. |
| Writing 'update_schemes_stats' to the file updates contents of |
| schemes stats files of the kdamond. Writing |
| 'update_schemes_tried_regions' to the file updates contents of |
| 'tried_regions' directory of every scheme directory of this |
| kdamond. Writing 'update_schemes_tried_bytes' to the file |
| updates only '.../tried_regions/total_bytes' files of this |
| kdamond. Writing 'clear_schemes_tried_regions' to the file |
| removes contents of the 'tried_regions' directory. Writing |
| 'update_schemes_effective_quotas' to the file updates |
| '.../quotas/effective_bytes' files of this kdamond. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/pid |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the pid of the kdamond if it is |
| running. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/nr_contexts |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for controlling each DAMON context named '0' to |
| 'N-1' under the contexts/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/avail_operations |
| Date: Apr 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the available monitoring operations |
| sets on the currently running kernel. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/operations |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a keyword for a monitoring operations set ('vaddr' for |
| virtual address spaces monitoring, 'fvaddr' for fixed virtual |
| address ranges monitoring, and 'paddr' for the physical address |
| space monitoring) to this file makes the context to use the |
| operations set. Reading the file returns the keyword for the |
| operations set the context is set to use. |
| |
| Note that only the operations sets that listed in |
| 'avail_operations' file are valid inputs. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/sample_us |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a value to this file sets the sampling interval of the |
| DAMON context in microseconds as the value. Reading this file |
| returns the value. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/aggr_us |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a value to this file sets the aggregation interval of |
| the DAMON context in microseconds as the value. Reading this |
| file returns the value. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/intervals/update_us |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| 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/<K>/contexts/<C>/monitoring_attrs/nr_regions/min |
| |
| WDate: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a value to this file sets the minimum number of |
| monitoring regions of the DAMON context as the value. Reading |
| this file returns the value. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/monitoring_attrs/nr_regions/max |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a value to this file sets the maximum number of |
| monitoring regions of the DAMON context as the value. Reading |
| this file returns the value. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/targets/nr_targets |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for controlling each DAMON target of the context |
| named '0' to 'N-1' under the contexts/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/targets/<T>/pid_target |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the pid of |
| the target process if the context is for virtual address spaces |
| monitoring, respectively. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/targets/<T>/regions/nr_regions |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for setting each DAMON target memory region of the |
| context named '0' to 'N-1' under the regions/ directory. In |
| case of the virtual address space monitoring, DAMON |
| automatically sets the target memory region based on the target |
| processes' mappings. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/targets/<T>/regions/<R>/start |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the start |
| address of the monitoring region. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/targets/<T>/regions/<R>/end |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the end |
| address of the monitoring region. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/nr_schemes |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for controlling each DAMON-based operation scheme |
| of the context named '0' to 'N-1' under the schemes/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/action |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the action |
| of the scheme. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/target_nid |
| Date: Jun 2024 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Action's target NUMA node id. Supported by only relevant |
| actions. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/apply_interval_us |
| Date: Sep 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a value to this file sets the action apply interval of |
| the scheme in microseconds. Reading this file returns the |
| value. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/sz/min |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the minimum |
| size of the scheme's target regions in bytes. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/sz/max |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the maximum |
| size of the scheme's target regions in bytes. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/nr_accesses/min |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the manimum |
| 'nr_accesses' of the scheme's target regions. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/nr_accesses/max |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the maximum |
| 'nr_accesses' of the scheme's target regions. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/age/min |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the minimum |
| 'age' of the scheme's target regions. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/access_pattern/age/max |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the maximum |
| 'age' of the scheme's target regions. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/ms |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the time |
| quota of the scheme in milliseconds. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/bytes |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the size |
| quota of the scheme in bytes. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/effective_bytes |
| Date: Feb 2024 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading from this file gets the effective size quota of the |
| scheme in bytes, which adjusted for the time quota and goals. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/reset_interval_ms |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the quotas |
| charge reset interval of the scheme in milliseconds. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/goals/nr_goals |
| Date: Nov 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for setting automatic tuning of the scheme's |
| aggressiveness named '0' to 'N-1' under the goals/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/goals/<G>/target_metric |
| Date: Feb 2024 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the quota |
| auto-tuning goal metric. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/goals/<G>/target_value |
| Date: Nov 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the target |
| value of the goal metric. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/goals/<G>/current_value |
| Date: Nov 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the current |
| value of the goal metric. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/weights/sz_permil |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the |
| under-quota limit regions prioritization weight for 'size' in |
| permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/weights/nr_accesses_permil |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the |
| under-quota limit regions prioritization weight for |
| 'nr_accesses' in permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/quotas/weights/age_permil |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the |
| under-quota limit regions prioritization weight for 'age' in |
| permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/watermarks/metric |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the metric |
| of the watermarks for the scheme. The writable/readable |
| keywords for this file are 'none' for disabling the watermarks |
| feature, or 'free_mem_rate' for the system's global free memory |
| rate in permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/watermarks/interval_us |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the metric |
| check interval of the watermarks for the scheme in |
| microseconds. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/watermarks/high |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the high |
| watermark of the scheme in permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/watermarks/mid |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the mid |
| watermark of the scheme in permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/watermarks/low |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the low |
| watermark of the scheme in permil. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/nr_filters |
| Date: Dec 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing a number 'N' to this file creates the number of |
| directories for setting filters of the scheme named '0' to |
| 'N-1' under the filters/ directory. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/type |
| Date: Dec 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing to and reading from this file sets and gets the type of |
| the memory of the interest. 'anon' for anonymous pages, |
| 'memcg' for specific memory cgroup, 'young' for young pages, |
| 'addr' for address range (an open-ended interval), or 'target' |
| for DAMON monitoring target can be written and read. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/memcg_path |
| Date: Dec 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: If 'memcg' is written to the 'type' file, writing to and |
| reading from this file sets and gets the path to the memory |
| cgroup of the interest. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/addr_start |
| Date: Jul 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: If 'addr' is written to the 'type' file, writing to or reading |
| from this file sets or gets the start address of the address |
| range for the filter. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/addr_end |
| Date: Jul 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: If 'addr' is written to the 'type' file, writing to or reading |
| from this file sets or gets the end address of the address |
| range for the filter. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/target_idx |
| Date: Dec 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: If 'target' is written to the 'type' file, writing to or |
| reading from this file sets or gets the index of the DAMON |
| monitoring target of the interest. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/filters/<F>/matching |
| Date: Dec 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Writing 'Y' or 'N' to this file sets whether to filter out |
| pages that do or do not match to the 'type' and 'memcg_path', |
| respectively. Filter out means the action of the scheme will |
| not be applied to. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/stats/nr_tried |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the number of regions that the action |
| of the scheme has tried to be applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/stats/sz_tried |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the total size of regions that the |
| action of the scheme has tried to be applied in bytes. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/stats/nr_applied |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the number of regions that the action |
| of the scheme has successfully applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/stats/sz_applied |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the total size of regions that the |
| action of the scheme has successfully applied in bytes. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/stats/qt_exceeds |
| Date: Mar 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the number of the exceed events of |
| the scheme's quotas. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/total_bytes |
| Date: Jul 2023 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the total amount of memory that |
| corresponding DAMON-based Operation Scheme's action has tried |
| to be applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/start |
| Date: Oct 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the start address of a memory region |
| that corresponding DAMON-based Operation Scheme's action has |
| tried to be applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/end |
| Date: Oct 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the end address of a memory region |
| that corresponding DAMON-based Operation Scheme's action has |
| tried to be applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/nr_accesses |
| Date: Oct 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the 'nr_accesses' of a memory region |
| that corresponding DAMON-based Operation Scheme's action has |
| tried to be applied. |
| |
| What: /sys/kernel/mm/damon/admin/kdamonds/<K>/contexts/<C>/schemes/<S>/tried_regions/<R>/age |
| Date: Oct 2022 |
| Contact: SeongJae Park <sj@kernel.org> |
| Description: Reading this file returns the 'age' of a memory region that |
| corresponding DAMON-based Operation Scheme's action has tried |
| to be applied. |
