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| author | Alexey Dobriyan <adobriyan@gmail.com> | 2020-04-07 06:09:05 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-04-07 20:43:42 +0300 |
| commit | 5c5ab9714c2225d50119e397c537ad5e568f268b (patch) | |
| tree | 9a68b7a199b7b287098b3197850fbff446bdcfb5 /fs/proc/task_mmu.c | |
| parent | d919b33dafb3e222d23671b2bb06d119aede625f (diff) | |
| download | linux-5c5ab9714c2225d50119e397c537ad5e568f268b.tar.xz | |
proc: speed up /proc/*/statm
top(1) reads all /proc/*/statm files but kernel threads will always have
zeros. Print those zeroes directly without going through
seq_put_decimal_ull().
Speed up reading /proc/2/statm (which is kthreadd) is like 3%.
My system has more kernel threads than normal processes after booting KDE.
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/20200307154435.GA2788@avx2
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/task_mmu.c')
0 files changed, 0 insertions, 0 deletions