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| author | Alexey Starikovskiy <astarikovskiy@suse.de> | 2010-05-26 05:53:07 +0200 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2010-07-07 04:33:56 +0200 |
| commit | c45b5c097001480e66d4c523eb715ad317a4ef77 (patch) | |
| tree | 5b9415840b97a724537273db99b2c66975c63347 /drivers/acpi/acpica/aclocal.h | |
| parent | ACPICA: Expand device initialization counters to 32 bits (diff) | |
| download | linux-c45b5c097001480e66d4c523eb715ad317a4ef77.tar.xz linux-c45b5c097001480e66d4c523eb715ad317a4ef77.zip | |
ACPICA: Performance enhancement for namespace search and access
This change enhances the performance of namespace searches and
walks by adding a backpointer to the parent in each namespace
node. On large namespaces, this change can improve overall ACPI
performance by up to 9X. Adding a pointer to each namespace node
increases the overall size of the internal namespace by about 5%,
since each namespace entry usually consists of both a namespace
node and an ACPI operand object.
Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/aclocal.h')
| -rw-r--r-- | drivers/acpi/acpica/aclocal.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/acpi/acpica/aclocal.h b/drivers/acpi/acpica/aclocal.h index 147a7e6bd38f..eb2d420b39ec 100644 --- a/drivers/acpi/acpica/aclocal.h +++ b/drivers/acpi/acpica/aclocal.h @@ -184,8 +184,9 @@ struct acpi_namespace_node { u8 flags; /* Miscellaneous flags */ acpi_owner_id owner_id; /* Node creator */ union acpi_name_union name; /* ACPI Name, always 4 chars per ACPI spec */ + struct acpi_namespace_node *parent; /* Parent node */ struct acpi_namespace_node *child; /* First child */ - struct acpi_namespace_node *peer; /* Peer. Parent if ANOBJ_END_OF_PEER_LIST set */ + struct acpi_namespace_node *peer; /* First peer */ /* * The following fields are used by the ASL compiler and disassembler only @@ -199,7 +200,7 @@ struct acpi_namespace_node { /* Namespace Node flags */ -#define ANOBJ_END_OF_PEER_LIST 0x01 /* End-of-list, Peer field points to parent */ +#define ANOBJ_RESERVED 0x01 /* Available for use */ #define ANOBJ_TEMPORARY 0x02 /* Node is create by a method and is temporary */ #define ANOBJ_METHOD_ARG 0x04 /* Node is a method argument */ #define ANOBJ_METHOD_LOCAL 0x08 /* Node is a method local */ |