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| author | Kirill A. Shutemov <[email protected]> | 2016-03-17 14:18:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2016-03-17 15:09:34 -0700 |
| commit | f9719a03de51e13526d614e79d002f838770b2d6 (patch) | |
| tree | 696f6164980d678f6ac8c9f796508bf7c9c778fa /tools/perf/scripts/python | |
| parent | 0a6b76dd23fa08c5fd7b68acdb55018a37afd4aa (diff) | |
thp, vmstats: count deferred split events
Count how many times we put a THP in split queue. Currently, it happens
on partial unmap of a THP.
Rapidly growing value can indicate that an application behaves
unfriendly wrt THP: often fault in huge page and then unmap part of it.
This leads to unnecessary memory fragmentation and the application may
require tuning.
The event also can help with debugging kernel [mis-]behaviour.
Signed-off-by: Kirill A. Shutemov <[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions