mm/damon/design.rst

13 The monitoring-related information including the monitoring request
17 types of monitoring.
29   operations for DAMON that depends on the given monitoring target
31 - :ref:`Core <damon_core_logic>`: Implements core logics including monitoring
46 For data access monitoring and additional low level work, DAMON needs a set of
49 monitoring are address-space dependent.
51 1. Identification of the monitoring target address range for the address space.
57 monitoring accruracy and the overhead.
88 and updates the monitoring target address regions so that entire memory
93 monitoring target address ranges.
100 cases.  That said, too huge unmapped areas inside the monitoring target should
150 monitoring attributes, ``sampling interval``, ``aggregation interval``,
182 The monitoring overhead of this mechanism will arbitrarily increase as the
198 called ``nr_accesses`` of the region.  Therefore, the monitoring overhead is
209 Even somehow the initial monitoring target regions are well constructed to
212 monitoring quality.  To keep the assumption as much as possible, DAMON
237 By analyzing the monitoring results, users can also find how long the current
251 The monitoring target address range could dynamically changed.  For example,
256 monitoring operations to check dynamic changes including memory mapping changes
257 and applies it to monitoring operations-related data structures such as the
258 abstracted monitoring target memory area only for each of a user-specified time
261 User-space can get the monitoring results via DAMON sysfs interface and/or
272 One common purpose of data access monitoring is access-aware system efficiency
283 optimizations.  That is, getting data access monitoring results of the
285 characteristics by profiling the monitoring results, and making system
295 including monitoring results and operation advice between kernel and user
301 level.  For such specifications, DAMON starts monitoring, finds regions having
323 normally depends on the monitoring target address space.  For example, the code
325 physical address ranges.  And the monitoring operations implementation sets are
369 the properties that DAMON's monitoring results provide, specifically the size,
484 is activated.  If all schemes are deactivated by the watermarks, the monitoring
534 - DAMON monitoring target
535     - Applied to pages that belonging to a given DAMON monitoring target.