Re: [PATCH -next v3 2/2] mm: vmscan: add new event to trace shrink lru

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在 2023/12/14 11:59, Yu Zhao 写道:
Example of output:
          kswapd0-103     [007] .....  1098.353020: mm_vmscan_lru_shrink_active_start: nid=0
          kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_active_end: nid=0 nr_taken=32 nr_active=0 nr_deactivated=32 nr_referenced=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC
          kswapd0-103     [007] .....  1098.353040: mm_vmscan_lru_shrink_inactive_start: nid=0
          kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=0 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=32 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_ANON|RECLAIM_WB_ASYNC
          kswapd0-103     [007] .....  1098.353094: mm_vmscan_lru_shrink_inactive_start: nid=0
          kswapd0-103     [007] .....  1098.353162: mm_vmscan_lru_shrink_inactive_end: nid=0 nr_scanned=32 nr_reclaimed=21 nr_dirty=0 nr_writeback=0 nr_congested=0 nr_immediate=0 nr_activate_anon=0 nr_activate_file=0 nr_ref_keep=11 nr_unmap_fail=0 priority=6 flags=RECLAIM_WB_FILE|RECLAIM_WB_ASYNC

Signed-off-by: Bixuan Cui<cuibixuan@xxxxxxxx>
NAK.

A _start should always be paired with an _end unless there is a good
reason not to.
Yes, I want to get the duration of shrink lru and slab (including shrink_active_list()/shrink_inactive_list()/shrinker->count_objects()/shrinker->scan_objects()),and then calculate the memory recycling rate.


mm-commits@ is the wrong mailing list to submit MM patches.
Thanks for reminding.


Is the build error Andrew pointed out earlier fixed? If so, where is
it credited to him?
Build error has been fixed in v2 patch, changes log:
v3: Swap the positions of 'nid' and 'freeable' to prevent the hole in the trace event. v2: Modify trace_mm_vmscan_lru_shrink_inactive() in evict_folios() at the same time.

Thanks
Bixuan Cui






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