On Mon, 28 Jan 2013 13:54:53 +0100, Andrey Zonov <z...@freebsd.org> wrote:
Author: zont
Date: Mon Jan 28 12:54:53 2013
New Revision: 246032
URL: http://svnweb.freebsd.org/changeset/base/246032
Log:
- Add system wide page faults requiring I/O counter.
Reviewed by: alc
MFC after: 2 weeks
Sounds very useful!
Ronald.
Modified:
head/sys/sys/vmmeter.h
head/sys/vm/vm_fault.c
head/sys/vm/vm_meter.c
Modified: head/sys/sys/vmmeter.h
==============================================================================
--- head/sys/sys/vmmeter.h Mon Jan 28 12:50:16 2013 (r246031)
+++ head/sys/sys/vmmeter.h Mon Jan 28 12:54:53 2013 (r246032)
@@ -61,6 +61,7 @@ struct vmmeter {
* Virtual memory activity.
*/
u_int v_vm_faults; /* (p) address memory faults */
+ u_int v_io_faults; /* (p) page faults requiring I/O */
u_int v_cow_faults; /* (p) copy-on-writes faults */
u_int v_cow_optim; /* (p) optimized copy-on-writes faults */
u_int v_zfod; /* (p) pages zero filled on demand */
Modified: head/sys/vm/vm_fault.c
==============================================================================
--- head/sys/vm/vm_fault.c Mon Jan 28 12:50:16 2013 (r246031)
+++ head/sys/vm/vm_fault.c Mon Jan 28 12:54:53 2013 (r246032)
@@ -939,9 +939,10 @@ vnode_locked:
* Unlock everything, and return
*/
unlock_and_deallocate(&fs);
- if (hardfault)
+ if (hardfault) {
+ PCPU_INC(cnt.v_io_faults);
curthread->td_ru.ru_majflt++;
- else
+ } else
curthread->td_ru.ru_minflt++;
return (KERN_SUCCESS);
Modified: head/sys/vm/vm_meter.c
==============================================================================
--- head/sys/vm/vm_meter.c Mon Jan 28 12:50:16 2013 (r246031)
+++ head/sys/vm/vm_meter.c Mon Jan 28 12:54:53 2013 (r246032)
@@ -283,6 +283,7 @@ VM_STATS_SYS(v_syscall, "System calls");
VM_STATS_SYS(v_intr, "Device interrupts");
VM_STATS_SYS(v_soft, "Software interrupts");
VM_STATS_VM(v_vm_faults, "Address memory faults");
+VM_STATS_VM(v_io_faults, "Page faults requiring I/O");
VM_STATS_VM(v_cow_faults, "Copy-on-write faults");
VM_STATS_VM(v_cow_optim, "Optimized COW faults");
VM_STATS_VM(v_zfod, "Pages zero-filled on demand");
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