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memory: inline some performance-sensitive accessors

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These accessors are called from inlined functions, and the call sequence
is much more expensive than just inlining the access.  Move the
struct declaration to memory-internal.h so that exec.c and memory.c
can both use an inline function.

Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2018-03-05 00:31:20 +01:00
parent 80d2b933f9
commit 785a507ec7
3 changed files with 30 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

13
include/exec/memory-internal.h
View file

@ -21,7 +21,15 @@
#define MEMORY_INTERNAL_H
#ifndef CONFIG_USER_ONLY
typedef struct AddressSpaceDispatch AddressSpaceDispatch;
static inline AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv)
{
return fv->dispatch;
}
static inline AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as)
{
return flatview_to_dispatch(address_space_to_flatview(as));
}
extern const MemoryRegionOps unassigned_mem_ops;
@ -31,9 +39,6 @@ bool memory_region_access_valid(MemoryRegion *mr, hwaddr addr,
void flatview_add_to_dispatch(FlatView *fv, MemoryRegionSection *section);
AddressSpaceDispatch *address_space_dispatch_new(FlatView *fv);
void address_space_dispatch_compact(AddressSpaceDispatch *d);
AddressSpaceDispatch *address_space_to_dispatch(AddressSpace *as);
AddressSpaceDispatch *flatview_to_dispatch(FlatView *fv);
void address_space_dispatch_free(AddressSpaceDispatch *d);
void mtree_print_dispatch(fprintf_function mon, void *f,

22
include/exec/memory.h
View file

@ -326,7 +326,27 @@ struct AddressSpace {
QTAILQ_ENTRY(AddressSpace) address_spaces_link;
};
FlatView *address_space_to_flatview(AddressSpace *as);
typedef struct AddressSpaceDispatch AddressSpaceDispatch;
typedef struct FlatRange FlatRange;
/* Flattened global view of current active memory hierarchy. Kept in sorted
* order.
*/
struct FlatView {
struct rcu_head rcu;
unsigned ref;
FlatRange *ranges;
unsigned nr;
unsigned nr_allocated;
struct AddressSpaceDispatch *dispatch;
MemoryRegion *root;
};
static inline FlatView *address_space_to_flatview(AddressSpace *as)
{
return atomic_rcu_read(&as->current_map);
}
/**
* MemoryRegionSection: describes a fragment of a #MemoryRegion