diff options
| author | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-01-02 16:32:00 +0100 |
|---|---|---|
| committer | Justus Winter <4winter@informatik.uni-hamburg.de> | 2014-01-03 00:42:40 +0100 |
| commit | 8982de2eb4fa2fa6f5a350c348c211542aecfaa1 (patch) | |
| tree | 4f7a18a8bd4c5b035312228823bf0ae198c64b2e /kern/slab.h | |
| parent | d775e04dd3ee9648ca91b1df965b435a34632606 (diff) | |
kern: make struct kmem_cache fit into two cache lines
Previously, the size of struct kmem_cache was 136 bytes, just eight
bytes larger than 128 bytes, which is typically two cache lines on
today's CPUs.
By reducing the size of the name field which holds a human-readable
description by eight bytes to 24 bytes, the struct kmem_cache can be
made fit into two cache lines. This change should not affect the
usefulness of this field. For reference, the length of the largest
hard-coded name is 17.
* kern/slab.h (KMEM_CACHE_NAME_SIZE): Define to 24.
Diffstat (limited to 'kern/slab.h')
| -rw-r--r-- | kern/slab.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kern/slab.h b/kern/slab.h index b842fb74..a4219c42 100644 --- a/kern/slab.h +++ b/kern/slab.h @@ -149,7 +149,7 @@ typedef void (*kmem_slab_free_fn_t)(vm_offset_t, vm_size_t); /* * Cache name buffer size. */ -#define KMEM_CACHE_NAME_SIZE 32 +#define KMEM_CACHE_NAME_SIZE 24 /* * Cache of objects. |