diff options
| -rw-r--r-- | libpager/pager-memcpy.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/libpager/pager-memcpy.c b/libpager/pager-memcpy.c index e5f4cdac..f2be5585 100644 --- a/libpager/pager-memcpy.c +++ b/libpager/pager-memcpy.c @@ -23,9 +23,10 @@ #include <assert.h> #include <string.h> -/* Start using vm_copy over memcpy when we have at a page. (This - value *cannot* be less than vm_page_size.) */ -#define VMCOPY_BETTER_THAN_MEMCPY (vm_page_size) +/* Start using vm_copy over memcpy when we have that many page. This is + roughly the L1 cache size. (This value *cannot* be less than + vm_page_size.) */ +#define VMCOPY_BETTER_THAN_MEMCPY (8*vm_page_size) /* Try to copy *SIZE bytes between the region OTHER points to and the region at OFFSET in the pager indicated by PAGER and MEMOBJ. @@ -42,8 +43,8 @@ pager_memcpy (struct pager *pager, memory_object_t memobj, error_t err; size_t n = *size; -#define VMCOPY_WINDOW_DEFAULT_SIZE (16 * vm_page_size) -#define MEMCPY_WINDOW_DEFAULT_SIZE (8 * vm_page_size) +#define VMCOPY_WINDOW_DEFAULT_SIZE (32 * vm_page_size) +#define MEMCPY_WINDOW_DEFAULT_SIZE (32 * vm_page_size) vm_address_t window; vm_size_t window_size; |