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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2025-01-24 16:37:58 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2025-02-03 03:38:32 +0300 |
| commit | 995cf0e014b0144edf1125668a97c252c5ab775e (patch) | |
| tree | 07e75bc5f655fc7bad39d48a4d831ad58dfed707 /tools/perf/scripts/python/sched-migration.py | |
| parent | 2014c95afecee3e76ca4a56956a936e23283f05b (diff) | |
| download | linux-995cf0e014b0144edf1125668a97c252c5ab775e.tar.xz | |
regmap: Reorder 'struct regmap'
On a x86_64, with configured with allmodconfig, pahole states that the
regmap structure is:
/* size: 1048, cachelines: 17, members: 78 */
/* sum members: 1006, holes: 9, sum holes: 35 */
/* padding: 7 */
/* member types with holes: 2, total: 2 */
/* last cacheline: 24 bytes */
So, when such a struct is allocated, 2048 bytes are allocated, with most of
this space being wasted.
Move a few bools so that the size is reduced to 1024.
After this change, pahole gives:
/* size: 1024, cachelines: 16, members: 78 */
/* sum members: 1006, holes: 6, sum holes: 18 */
/* member types with holes: 2, total: 2 */
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://patch.msgid.link/f01f900d15633d5cda5f27763723acb307c0d22f.1737725820.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/sched-migration.py')
0 files changed, 0 insertions, 0 deletions