On Mon, Jun 28, 2021 at 6:34 AM SeongJae Park <sj38.park@xxxxxxxxx> wrote: > > From: SeongJae Park <sjpark@xxxxxxxxx> > > Even somehow the initial monitoring target regions are well constructed > to fulfill the assumption (pages in same region have similar access > frequencies), the data access pattern can be dynamically changed. This > will result in low monitoring quality. To keep the assumption as much > as possible, DAMON adaptively merges and splits each region based on > their access frequency. > > For each ``aggregation interval``, it compares the access frequencies of > adjacent regions and merges those if the frequency difference is small. > Then, after it reports and clears the aggregated access frequency of > each region, it splits each region into two or three regions if the > total number of regions will not exceed the user-specified maximum > number of regions after the split. > > In this way, DAMON provides its best-effort quality and minimal overhead > while keeping the upper-bound overhead that users set. > > Signed-off-by: SeongJae Park <sjpark@xxxxxxxxx> > Reviewed-by: Leonard Foerster <foersleo@xxxxxxxxx> > Reviewed-by: Fernand Sieber <sieberf@xxxxxxxxxx> Acked-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
