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| author | kib <kib@FreeBSD.org> | 2017-08-03 07:28:54 +0000 |
|---|---|---|
| committer | Luiz Souza <luiz@netgate.com> | 2018-02-21 15:17:57 -0300 |
| commit | 5d7057db969c65be347887d98320f74442d9aeff (patch) | |
| tree | c92230149e79192080d1c2271e4adce2dab2bb44 /sys/sys | |
| parent | 8e45467a03c7dedb096e314450d0d5579f7df936 (diff) | |
| download | FreeBSD-src-5d7057db969c65be347887d98320f74442d9aeff.zip FreeBSD-src-5d7057db969c65be347887d98320f74442d9aeff.tar.gz | |
MFC r321625:
Make the number of children for pctrie node available outside subr_pctrie.c.
(cherry picked from commit e2e84a25a976cfd8cb2558e17386d2fa77887aca)
Diffstat (limited to 'sys/sys')
| -rw-r--r-- | sys/sys/pctrie.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sys/sys/pctrie.h b/sys/sys/pctrie.h index 56c1b8c..1fd0b34 100644 --- a/sys/sys/pctrie.h +++ b/sys/sys/pctrie.h @@ -133,5 +133,18 @@ pctrie_is_empty(struct pctrie *ptree) return (ptree->pt_root == 0); } +/* + * These widths should allow the pointers to a node's children to fit within + * a single cache line. The extra levels from a narrow width should not be + * a problem thanks to path compression. + */ +#ifdef __LP64__ +#define PCTRIE_WIDTH 4 +#else +#define PCTRIE_WIDTH 3 +#endif + +#define PCTRIE_COUNT (1 << PCTRIE_WIDTH) + #endif /* _KERNEL */ #endif /* !_SYS_PCTRIE_H_ */ |
