diff options
| author | Fan Li <fanofcode.li@samsung.com> | 2017-11-07 14:14:24 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-11-09 20:43:09 +0300 |
| commit | 974565744955b6154a93c85b77cb94026c85ff5a (patch) | |
| tree | fefdedfa4ff3872c5a10affb50ebcd47cba59927 /tools/perf/scripts/python/call-graph-from-sql.py | |
| parent | 74986213adaff2ceab81fc0bb29dbb80d05665b3 (diff) | |
| download | linux-974565744955b6154a93c85b77cb94026c85ff5a.tar.xz | |
f2fs: optimize the way of traversing free_nid_bitmap
We call scan_free_nid_bits only when there isn't many
free nids left, it means that marked bits in free_nid_bitmap
are supposed to be few, use find_next_bit_le is more
efficient in such case.
According to my tests, use find_next_bit_le instead of
test_bit_le will cut down the traversal time to one
third of its original.
Signed-off-by: Fan li <fanofcode.li@samsung.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-sql.py')
0 files changed, 0 insertions, 0 deletions