diff options
| -rw-r--r-- | src/config.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/config.h b/src/config.h index dbe3c74..73348ac 100644 --- a/src/config.h +++ b/src/config.h @@ -191,6 +191,29 @@ static inline size_t flex_sizeof_impl(size_t align, size_t min, size_t offset, s return ret; } +/** + * False sharing/destructive interference/largest cache line size. + */ +#ifdef __GCC_DESTRUCTIVE_SIZE +# define FALSE_SHARING_SIZE __GCC_DESTRUCTIVE_SIZE +#else +# define FALSE_SHARING_SIZE 64 +#endif + +/** + * True sharing/constructive interference/smallest cache line size. + */ +#ifdef __GCC_CONSTRUCTIVE_SIZE +# define TRUE_SHARING_SIZE __GCC_CONSTRUCTIVE_SIZE +#else +# define TRUE_SHARING_SIZE 64 +#endif + +/** + * Alignment specifier that avoids false sharing. + */ +#define cache_align alignas(FALSE_SHARING_SIZE) + // Wrappers for attributes /** |