From 9eacb0eab6eb8e35bb26ab3db660973fddf9e8fb Mon Sep 17 00:00:00 2001 From: Richard Braun Date: Sun, 23 Sep 2012 00:25:13 +0200 Subject: Provide basic page cache statistics * Makefrag.am (EXTRA_DIST): Add kern/gnumach.srv. (include_mach_HEADERS): Add include/mach/gnumach.defs and include/mach/vm_cache_statistics.h (nodist_libkernel_a_SOURCES): Add kern/gnumach.server.defs.c, kern/gnumach.server.h, kern/gnumach.server.c, kern/gnumach.server.msgids, kern/gnumach.server.defs. * include/mach/mach_types.h: Add #include . * kern/ipc_kobject.c (ipc_kobject_server): Declare and call gnumach_server_routine. * vm/vm_object.c (vm_object_cached_pages): New variable. (vm_object_cached_pages_lock_data): Likewise. (vm_object_deallocate): Update number of cached pages. (vm_object_lookup): Likewise. (vm_object_lookup_name): Likewise. (vm_object_destroy): Likewise. (vm_object_enter): Likewise. * vm/vm_object.h (ref_count): Declare as int. (resident_page_count): Likewise. (vm_object_cached_count): Add extern declaration. (vm_object_cached_pages): Likewise. (vm_object_cached_pages_lock_data): Likewise. (vm_object_cached_pages_update): New macro. * vm/vm_resident.c (vm_page_insert): Assert resident page count doesn't overflow, update number of cached pages as appropriate. (vm_page_replace): Likewise. (vm_page_remove): Update number of cached pages as appropriate. * vm/vm_user.c: Add #include . (vm_cache_statistics): New function. * vm/vm_user.h: Add #include . (vm_cache_statistics): New declaration. * include/mach/gnumach.defs: New file. --- vm/vm_resident.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'vm/vm_resident.c') diff --git a/vm/vm_resident.c b/vm/vm_resident.c index ae71a74d..581a9c42 100644 --- a/vm/vm_resident.c +++ b/vm/vm_resident.c @@ -517,6 +517,10 @@ void vm_page_insert( */ object->resident_page_count++; + assert(object->resident_page_count >= 0); + + if (object->can_persist && (object->ref_count == 0)) + vm_object_cached_pages_update(1); /* * Detect sequential access and inactivate previous page. @@ -585,6 +589,10 @@ void vm_page_replace( m->tabled = FALSE; object->resident_page_count--; + if (object->can_persist + && (object->ref_count == 0)) + vm_object_cached_pages_update(-1); + /* * Return page to the free list. * Note the page is not tabled now, so this @@ -616,6 +624,10 @@ void vm_page_replace( */ object->resident_page_count++; + assert(object->resident_page_count >= 0); + + if (object->can_persist && (object->ref_count == 0)) + vm_object_cached_pages_update(1); } /* @@ -671,6 +683,9 @@ void vm_page_remove( mem->object->resident_page_count--; mem->tabled = FALSE; + + if (mem->object->can_persist && (mem->object->ref_count == 0)) + vm_object_cached_pages_update(-1); } /* -- cgit v1.2.3