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| author | Yury Norov <yury.norov@gmail.com> | 2021-08-14 23:17:13 +0200 |
|---|---|---|
| committer | Yury Norov <yury.norov@gmail.com> | 2022-01-15 17:47:31 +0100 |
| commit | 15325b4f768f2b27b5765489eeab6ec0d6b5e902 (patch) | |
| tree | f29491038480dcf4575c84207f8f7ad2557f21d6 /mm | |
| parent | lib: bitmap: add performance test for bitmap_print_to_pagebuf (diff) | |
| download | linux-15325b4f768f2b27b5765489eeab6ec0d6b5e902.tar.xz linux-15325b4f768f2b27b5765489eeab6ec0d6b5e902.zip | |
vsprintf: rework bitmap_list_string
bitmap_list_string() is very ineffective when printing bitmaps with long
ranges of set bits because it calls find_next_bit for each bit in the
bitmap. We can do better by detecting ranges of set bits.
In my environment, before/after is 943008/31008 ns.
Signed-off-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions