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Reduce the target number of vnodes on the freelist from desiredvnodes

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(usually a couple of thousand) to 25.  The measured impact on cache-hits
doesn't justify spending memory this way:

Target number of free vnodes versus namecache hit rate in % during a
make world:
          10    98.5316
         200    98.5479
         500    98.5546
        1000    98.5709
        3000    98.6006
        4000    98.6126
This commit is contained in:
Poul-Henning Kamp 1997-09-25 16:17:57 +00:00
parent fcc58b9423
commit 87b1940afa
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=29853
2 changed files with 4 additions and 4 deletions
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4
sys/kern/vfs_export.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.104 1997/09/16 11:43:38 bde Exp $
* $Id: vfs_subr.c,v 1.105 1997/09/24 07:46:53 phk Exp $
*/
/*
@ -95,7 +95,7 @@ int vttoif_tab[9] = {
(bp)->b_vnbufs.le_next = NOLIST; \
}
TAILQ_HEAD(freelst, vnode) vnode_free_list; /* vnode free list */
static u_long wantfreevnodes = 0;
static u_long wantfreevnodes = 25;
SYSCTL_INT(_debug, OID_AUTO, wantfreevnodes, CTLFLAG_RW, &wantfreevnodes, 0, "");
static u_long freevnodes = 0;
SYSCTL_INT(_debug, OID_AUTO, freevnodes, CTLFLAG_RD, &freevnodes, 0, "");

4
sys/kern/vfs_subr.c
View File

@ -36,7 +36,7 @@
* SUCH DAMAGE.
*
* @(#)vfs_subr.c 8.31 (Berkeley) 5/26/95
* $Id: vfs_subr.c,v 1.104 1997/09/16 11:43:38 bde Exp $
* $Id: vfs_subr.c,v 1.105 1997/09/24 07:46:53 phk Exp $
*/
/*
@ -95,7 +95,7 @@ int vttoif_tab[9] = {
(bp)->b_vnbufs.le_next = NOLIST; \
}
TAILQ_HEAD(freelst, vnode) vnode_free_list; /* vnode free list */
static u_long wantfreevnodes = 0;
static u_long wantfreevnodes = 25;
SYSCTL_INT(_debug, OID_AUTO, wantfreevnodes, CTLFLAG_RW, &wantfreevnodes, 0, "");
static u_long freevnodes = 0;
SYSCTL_INT(_debug, OID_AUTO, freevnodes, CTLFLAG_RD, &freevnodes, 0, "");