system/freebsd-src
system/freebsd-src
1
0
Fork 0
mirror of https://github.com/freebsd/freebsd-src synced 2024-09-26 19:54:57 +00:00
Code Issues Packages Projects Releases Wiki Activity

Machine dependent routines to support pre-zeroed free pages. This

Browse source 
significantly improves demand zero performance.
This commit is contained in:
John Dyson 1995-09-03 20:39:22 +00:00
parent 41db6f5f99
commit a29b63cb73
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=10546
5 changed files with 52 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
sys/amd64/amd64/cpu_switch.S
View file

@ -33,7 +33,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: swtch.s,v 1.19 1995/01/21 15:20:23 bde Exp $
* $Id: swtch.s,v 1.20 1995/02/17 02:22:42 phk Exp $
*/
#include "npx.h" /* for NNPX */
@ -278,6 +278,9 @@ idle_loop:
cmpl $0,_whichidqs /* 'idle' queue */
jne idqr
movb $0,_intr_nesting_level /* charge Idle for this loop */
call _vm_page_zero_idle
testl %eax, %eax
jnz idle_loop
#if NAPM > 0
#if APM_SLOWSTART <= 0 || !defined(APM_SLOWSTART)
/*

5
sys/amd64/amd64/swtch.s
View file

@ -33,7 +33,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: swtch.s,v 1.19 1995/01/21 15:20:23 bde Exp $
* $Id: swtch.s,v 1.20 1995/02/17 02:22:42 phk Exp $
*/
#include "npx.h" /* for NNPX */
@ -278,6 +278,9 @@ idle_loop:
cmpl $0,_whichidqs /* 'idle' queue */
jne idqr
movb $0,_intr_nesting_level /* charge Idle for this loop */
call _vm_page_zero_idle
testl %eax, %eax
jnz idle_loop
#if NAPM > 0
#if APM_SLOWSTART <= 0 || !defined(APM_SLOWSTART)
/*

21
sys/amd64/amd64/vm_machdep.c
View file

@ -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 1.40 1995/07/13 08:47:29 davidg Exp $
* $Id: vm_machdep.c,v 1.41 1995/07/29 11:38:53 bde Exp $
*/
#include "npx.h"
@ -862,3 +862,22 @@ grow(p, sp)
return (1);
}
/*
* prototype routine to implement the pre-zeroed page mechanism
* this routine is called from the idle loop.
*/
int
vm_page_zero_idle() {
vm_page_t m;
if ((cnt.v_free_count > cnt.v_interrupt_free_min) &&
(m = vm_page_queue_free.tqh_first)) {
TAILQ_REMOVE(&vm_page_queue_free, m, pageq);
enable_intr();
pmap_zero_page(VM_PAGE_TO_PHYS(m));
disable_intr();
TAILQ_INSERT_TAIL(&vm_page_queue_zero, m, pageq);
return 1;
}
return 0;
}

5
sys/i386/i386/swtch.s
View file

@ -33,7 +33,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: swtch.s,v 1.19 1995/01/21 15:20:23 bde Exp $
* $Id: swtch.s,v 1.20 1995/02/17 02:22:42 phk Exp $
*/
#include "npx.h" /* for NNPX */
@ -278,6 +278,9 @@ idle_loop:
cmpl $0,_whichidqs /* 'idle' queue */
jne idqr
movb $0,_intr_nesting_level /* charge Idle for this loop */
call _vm_page_zero_idle
testl %eax, %eax
jnz idle_loop
#if NAPM > 0
#if APM_SLOWSTART <= 0 || !defined(APM_SLOWSTART)
/*

21
sys/i386/i386/vm_machdep.c
View file

@ -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 1.40 1995/07/13 08:47:29 davidg Exp $
* $Id: vm_machdep.c,v 1.41 1995/07/29 11:38:53 bde Exp $
*/
#include "npx.h"
@ -862,3 +862,22 @@ grow(p, sp)
return (1);
}
/*
* prototype routine to implement the pre-zeroed page mechanism
* this routine is called from the idle loop.
*/
int
vm_page_zero_idle() {
vm_page_t m;
if ((cnt.v_free_count > cnt.v_interrupt_free_min) &&
(m = vm_page_queue_free.tqh_first)) {
TAILQ_REMOVE(&vm_page_queue_free, m, pageq);
enable_intr();
pmap_zero_page(VM_PAGE_TO_PHYS(m));
disable_intr();
TAILQ_INSERT_TAIL(&vm_page_queue_zero, m, pageq);
return 1;
}
return 0;
}