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authorDaniel Borkmann <dborkman@redhat.com>2013-08-26 18:34:00 +0400
committerDavid S. Miller <davem@davemloft.net>2013-08-29 22:55:54 +0400
commit76bfd8984430be5b19727d09f6ab5e1d7a247f8c (patch)
treea41d90d3aa24724ada4945fca3085dfeab9bef4b /include/net/sctp
parent03536cc3ad611f29a35803d37a44414b823135c3 (diff)
downloadlinux-76bfd8984430be5b19727d09f6ab5e1d7a247f8c.tar.xz
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: Daniel Borkmann <dborkman@redhat.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/net/sctp')
-rw-r--r--include/net/sctp/structs.h20
1 files changed, 9 insertions, 11 deletions
diff --git a/include/net/sctp/structs.h b/include/net/sctp/structs.h
index 422db6cc3214..2174d8da0770 100644
--- a/include/net/sctp/structs.h
+++ b/include/net/sctp/structs.h
@@ -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;