diff options
| author | Richard Braun <rbraun@sceen.net> | 2012-09-23 00:25:13 +0200 |
|---|---|---|
| committer | Samuel Thibault <samuel.thibault@ens-lyon.org> | 2012-09-23 00:28:40 +0200 |
| commit | 9eacb0eab6eb8e35bb26ab3db660973fddf9e8fb (patch) | |
| tree | 03d50c74d110f2bab3a8fb2ebac9eb7aca0313c4 /vm/vm_object.h | |
| parent | f5f6f62357b90e1ce1eb24f2929314b0d84078d0 (diff) | |
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 <mach/vm_cache_statistics.h>.
* 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 <mach/vm_cache_statistics.h>.
(vm_cache_statistics): New function.
* vm/vm_user.h: Add #include <mach/mach_types.h>.
(vm_cache_statistics): New declaration.
* include/mach/gnumach.defs: New file.
Diffstat (limited to 'vm/vm_object.h')
| -rw-r--r-- | vm/vm_object.h | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/vm/vm_object.h b/vm/vm_object.h index c992570..4e4c949 100644 --- a/vm/vm_object.h +++ b/vm/vm_object.h @@ -71,8 +71,8 @@ struct vm_object { * if internal) */ - short ref_count; /* Number of references */ - short resident_page_count; + int ref_count; /* Number of references */ + int resident_page_count; /* number of resident pages */ struct vm_object *copy; /* Object that should receive @@ -370,4 +370,23 @@ MACRO_END #define vm_object_lock_taken(object) simple_lock_taken(&(object)->Lock) #endif /* VM_OBJECT_DEBUG */ +/* + * Page cache accounting. + * + * The number of cached objects and pages can be read + * without holding any lock. + */ + +extern int vm_object_cached_count; + +extern int vm_object_cached_pages; +decl_simple_lock_data(extern,vm_object_cached_pages_lock_data) + +#define vm_object_cached_pages_update(page_count) \ + MACRO_BEGIN \ + simple_lock(&vm_object_cached_pages_lock_data); \ + vm_object_cached_pages += (page_count); \ + simple_unlock(&vm_object_cached_pages_lock_data); \ + MACRO_END + #endif /* _VM_VM_OBJECT_H_ */ |