提交 76bfd898 编写于 作者: D Daniel Borkmann 提交者: David S. Miller

net: sctp: reorder sctp_globals to reduce cacheline usage

Reduce cacheline usage from 2 to 1 cacheline for sctp_globals structure. By
reordering elements, we can close gaps and simply achieve the following:

Current situation:
  /* size: 80, cachelines: 2, members: 10 */
  /* sum members: 57, holes: 4, sum holes: 16 */
  /* padding: 7 */
  /* last cacheline: 16 bytes */

Afterwards:
  /* size: 64, cachelines: 1, members: 10 */
  /* padding: 7 */
Signed-off-by: NDaniel Borkmann <dborkman@redhat.com>
Acked-by: NNeil Horman <nhorman@tuxdriver.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 03536cc3
......@@ -113,29 +113,27 @@ struct sctp_hashbucket {
/* The SCTP globals structure. */
extern struct sctp_globals {
/* The following variables are implementation specific. */
/* Default initialization values to be applied to new associations. */
__u16 max_instreams;
__u16 max_outstreams;
/* This is a list of groups of functions for each address
* family that we support.
*/
struct list_head address_families;
/* This is the hash of all endpoints. */
int ep_hashsize;
struct sctp_hashbucket *ep_hashtable;
/* This is the hash of all associations. */
int assoc_hashsize;
struct sctp_hashbucket *assoc_hashtable;
/* This is the sctp port control hash. */
int port_hashsize;
struct sctp_bind_hashbucket *port_hashtable;
/* Sizes of above hashtables. */
int ep_hashsize;
int assoc_hashsize;
int port_hashsize;
/* Default initialization values to be applied to new associations. */
__u16 max_instreams;
__u16 max_outstreams;
/* Flag to indicate whether computing and verifying checksum
* is disabled. */
bool checksum_disable;
......
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