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| author | Nicholas Piggin <npiggin@gmail.com> | 2018-03-07 11:37:16 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-03-13 23:43:08 +1100 |
| commit | d262bd5a73998252d1cdf632bedaf1ca540839d8 (patch) | |
| tree | dbb92a59ad57224ed688c13fdb0b1b6ceb8b975e /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | powerpc/mm/slice: remove dead code (diff) | |
| download | linux-d262bd5a73998252d1cdf632bedaf1ca540839d8.tar.gz linux-d262bd5a73998252d1cdf632bedaf1ca540839d8.zip | |
powerpc/mm/slice: Use const pointers to cached slice masks where possible
The slice_mask cache was a basic conversion which copied the slice
mask into caller's structures, because that's how the original code
worked. In most cases the pointer can be used directly instead, saving
a copy and an on-stack structure.
On POWER8, this increases vfork+exec+exit performance by 0.3%
and reduces time to mmap+munmap a 64kB page by 2%.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions