Hello Xin, thank you for this patch! On Tue, 12 Oct 2021 13:49:48 +0800 Xin Hao <xhao@xxxxxxxxxxxxxxxxx> wrote: > Using damon-dbgfs has brought great convenience to user-mode > operation damon, but sometimes if i want to be able to view > the division of task regions, nr_access values etc,but i found > that it is impossible to view directly through the dbgfs interface, > so there i add a interface "region_stat", it displays like this. > > # cat region_stat > last_aggregation=120.87s > target_id=5148 > nr_regions=10 > 400000-258c000(34352 KiB): 1 > 258c000-4719000(34356 KiB): 0 > 4719000-abbf000(103064 KiB): 0 > abbf000-c4d4000(25684 KiB): 11 > c4d4000-ff5c000(59936 KiB): 15 > ff5c000-152f9000(85620 KiB): 20 > 152f9000-1599e000(6804 KiB): 10 > 1599e000-19573000(61268 KiB): 0 > 19573000-1f92c000(102116 KiB): 0 > 1f92c000-22a4c000(50304 KiB): 0 I think similar information could also be collected via the 'damon_aggregated' tracepoint[1], which is merged in the mainline, or 'DAMOS_STAT'[2], which is merged in -mm. The recording feature[3] could also be used, though it would take some time before it is merged in the mainline. Have you considered using those but found some problem? [1] https://git.kernel.org/torvalds/c/2fcb93629ad8 [2] https://lore.kernel.org/linux-mm/20211001125604.29660-6-sj@xxxxxxxxxx/ [3] https://lore.kernel.org/linux-mm/20211008094509.16179-1-sj@xxxxxxxxxx/ Thanks, SJ [...]
