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| author | dillon <dillon@FreeBSD.org> | 1999-02-08 02:42:13 +0000 |
|---|---|---|
| committer | dillon <dillon@FreeBSD.org> | 1999-02-08 02:42:13 +0000 |
| commit | e402e06da9c1a92c9f9a4aff4e0f6a616c402b6c (patch) | |
| tree | 576f493b48349d3fa12752d1fb27f742af833aac /sys/amd64/amd64/vm_machdep.c | |
| parent | 224065be12d96523e4cb568367d79849c55965d6 (diff) | |
| download | FreeBSD-src-e402e06da9c1a92c9f9a4aff4e0f6a616c402b6c.zip FreeBSD-src-e402e06da9c1a92c9f9a4aff4e0f6a616c402b6c.tar.gz | |
Adjust idle zero-page fill hysteresis based on tests. Use 2/3 and 4/5
zero-fill levels.
Adjust comment for ozfod in vmmeter.h - this counter represents
non-optimal ( on the fly ) zero fills, not prefills.
Diffstat (limited to 'sys/amd64/amd64/vm_machdep.c')
| -rw-r--r-- | sys/amd64/amd64/vm_machdep.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/sys/amd64/amd64/vm_machdep.c b/sys/amd64/amd64/vm_machdep.c index 2e9e6aa..5ea99bf 100644 --- a/sys/amd64/amd64/vm_machdep.c +++ b/sys/amd64/amd64/vm_machdep.c @@ -38,7 +38,7 @@ * * from: @(#)vm_machdep.c 7.3 (Berkeley) 5/13/91 * Utah $Hdr: vm_machdep.c 1.16.1.1 89/06/23$ - * $Id: vm_machdep.c,v 1.116 1999/01/29 08:36:42 dillon Exp $ + * $Id: vm_machdep.c,v 1.117 1999/02/08 00:37:35 dillon Exp $ */ #include "npx.h" @@ -586,6 +586,10 @@ SYSCTL_INT(_vm_stats_misc, OID_AUTO, * Implement the pre-zeroed page mechanism. * This routine is called from the idle loop. */ + +#define ZIDLE_LO(v) ((v) * 2 / 3) +#define ZIDLE_HI(v) ((v) * 4 / 5) + int vm_page_zero_idle() { @@ -603,9 +607,9 @@ vm_page_zero_idle() * pages because doing so may flush our L1 and L2 caches too much. */ - if (zero_state && vm_page_zero_count >= cnt.v_free_count / 3) + if (zero_state && vm_page_zero_count >= ZIDLE_LO(cnt.v_free_count)) return(0); - if (vm_page_zero_count >= cnt.v_free_count / 2) + if (vm_page_zero_count >= ZIDLE_HI(cnt.v_free_count)) return(0); #ifdef SMP @@ -635,7 +639,7 @@ vm_page_zero_idle() pageq); ++vm_page_zero_count; ++cnt_prezero; - if (vm_page_zero_count >= cnt.v_free_count / 2) + if (vm_page_zero_count >= ZIDLE_HI(cnt.v_free_count)) zero_state = 1; } free_rover = (free_rover + PQ_PRIME3) & PQ_L2_MASK; |
