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Move exact match pcb's to the head of the list to improve lookup

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performance.
This commit is contained in:
David Greenman 1995-03-02 19:29:42 +00:00
parent 3d0dfb4eea
commit 3dbdc25caa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=6835
1 changed files with 8 additions and 3 deletions
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11
sys/netinet/in_pcb.c
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@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)in_pcb.c 8.2 (Berkeley) 1/4/94
* $Id: in_pcb.c,v 1.4 1995/02/08 20:22:07 wollman Exp $
* $Id: in_pcb.c,v 1.5 1995/02/16 00:55:37 wollman Exp $
*/
#include <sys/param.h>
@ -495,7 +495,7 @@ in_pcblookup(head, faddr, fport_arg, laddr, lport_arg, flags)
u_int fport_arg, lport_arg;
int flags;
{
register struct inpcb *inp, *match = 0;
register struct inpcb *inp, *match = NULL;
int matchwild = 3, wildcard;
u_short fport = fport_arg, lport = lport_arg;
@ -527,8 +527,13 @@ in_pcblookup(head, faddr, fport_arg, laddr, lport_arg, flags)
if (wildcard < matchwild) {
match = inp;
matchwild = wildcard;
if (matchwild == 0)
if (matchwild == 0) {
if (match->inp_prev != head) {
remque(match);
insque(match, head);
}
break;
}
}
}
return (match);