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