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| author | Christophe JAILLET <christophe.jaillet@wanadoo.fr> | 2024-11-02 00:13:33 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2024-11-11 13:49:48 +0300 |
| commit | c554aa9ca976480839af342204e05bb4ce8367d5 (patch) | |
| tree | 23d74ed0011bb04f551abe3c6d928d0cab20de98 /tools/perf/scripts/python/parallel-perf.py | |
| parent | 2e71e8bc6f02275a67bcb882779ab6d21abc68c4 (diff) | |
| download | linux-c554aa9ca976480839af342204e05bb4ce8367d5.tar.xz | |
uprobes: Re-order struct uprobe_task to save some space
On x86_64, with allmodconfig, struct uprobe_task is 72 bytes long, with a
hole and some padding.
/* size: 72, cachelines: 2, members: 7 */
/* sum members: 64, holes: 1, sum holes: 4 */
/* padding: 4 */
/* forced alignments: 1, forced holes: 1, sum forced holes: 4 */
/* last cacheline: 8 bytes */
Reorder the structure to fill the hole and avoid the padding.
This way, the whole structure fits in a single cacheline and some memory is
saved when it is allocated.
/* size: 64, cachelines: 1, members: 7 */
/* forced alignments: 1 */
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: "Masami Hiramatsu (Google)" <mhiramat@kernel.org>
Link: https://lore.kernel.org/r/a9f541d0cedf421f765c77a1fb93d6a979778a88.1730495562.git.christophe.jaillet@wanadoo.fr
Diffstat (limited to 'tools/perf/scripts/python/parallel-perf.py')
0 files changed, 0 insertions, 0 deletions