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Make TCBHASHSIZE a boot-time tunable as well, taking its value from the

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variable net.inet.tcp.tcbhashsize.

Requested by:	David Filo <filo@yahoo-inc.com>
This commit is contained in:
Mike Smith 1999-02-03 08:59:30 +00:00
parent dccbc08d92
commit aa1458495d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=43562
2 changed files with 28 additions and 8 deletions
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18
sys/netinet/tcp_subr.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95
* $Id: tcp_subr.c,v 1.48 1998/11/15 21:35:09 guido Exp $
* $Id: tcp_subr.c,v 1.49 1998/12/07 21:58:42 archie Exp $
*/
#include "opt_compat.h"
@ -93,6 +93,9 @@ static void tcp_notify __P((struct inpcb *, int));
/*
* Target size of TCP PCB hash tables. Must be a power of two.
*
* Note that this can be overridden by the kernel environment
* variable net.inet.tcp.tcbhashsize
*/
#ifndef TCBHASHSIZE
#define TCBHASHSIZE 512
@ -124,14 +127,21 @@ struct inp_tp {
void
tcp_init()
{
int hashsize;
tcp_iss = random(); /* wrong, but better than a constant */
tcp_ccgen = 1;
tcp_cleartaocache();
LIST_INIT(&tcb);
tcbinfo.listhead = &tcb;
tcbinfo.hashbase = hashinit(TCBHASHSIZE, M_PCB, &tcbinfo.hashmask);
tcbinfo.porthashbase = hashinit(TCBHASHSIZE, M_PCB,
if (!(getenv_int("net.inet.tcp.tcbhashsize", &hashsize)))
hashsize = TCBHASHSIZE;
if ((1 << ffs(hashsize)) != hashsize) {
printf("WARNING: TCB hash size not a power of 2\n");
hashsize = 512; /* safe default */
}
tcbinfo.hashbase = hashinit(hashsize, M_PCB, &tcbinfo.hashmask);
tcbinfo.porthashbase = hashinit(hashsize, M_PCB,
&tcbinfo.porthashmask);
tcbinfo.ipi_zone = zinit("tcpcb", sizeof(struct inp_tp), maxsockets,
ZONE_INTERRUPT, 0);

18
sys/netinet/tcp_timewait.c
View File

@ -31,7 +31,7 @@
* SUCH DAMAGE.
*
* @(#)tcp_subr.c 8.2 (Berkeley) 5/24/95
* $Id: tcp_subr.c,v 1.48 1998/11/15 21:35:09 guido Exp $
* $Id: tcp_subr.c,v 1.49 1998/12/07 21:58:42 archie Exp $
*/
#include "opt_compat.h"
@ -93,6 +93,9 @@ static void tcp_notify __P((struct inpcb *, int));
/*
* Target size of TCP PCB hash tables. Must be a power of two.
*
* Note that this can be overridden by the kernel environment
* variable net.inet.tcp.tcbhashsize
*/
#ifndef TCBHASHSIZE
#define TCBHASHSIZE 512
@ -124,14 +127,21 @@ struct inp_tp {
void
tcp_init()
{
int hashsize;
tcp_iss = random(); /* wrong, but better than a constant */
tcp_ccgen = 1;
tcp_cleartaocache();
LIST_INIT(&tcb);
tcbinfo.listhead = &tcb;
tcbinfo.hashbase = hashinit(TCBHASHSIZE, M_PCB, &tcbinfo.hashmask);
tcbinfo.porthashbase = hashinit(TCBHASHSIZE, M_PCB,
if (!(getenv_int("net.inet.tcp.tcbhashsize", &hashsize)))
hashsize = TCBHASHSIZE;
if ((1 << ffs(hashsize)) != hashsize) {
printf("WARNING: TCB hash size not a power of 2\n");
hashsize = 512; /* safe default */
}
tcbinfo.hashbase = hashinit(hashsize, M_PCB, &tcbinfo.hashmask);
tcbinfo.porthashbase = hashinit(hashsize, M_PCB,
&tcbinfo.porthashmask);
tcbinfo.ipi_zone = zinit("tcpcb", sizeof(struct inp_tp), maxsockets,
ZONE_INTERRUPT, 0);