openkylin
/
qemu
mirror of https://gitee.com/openkylin/qemu.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

memory: reorder MemoryRegion fields 

Order fields so that all fields accessed during a RAM read/write fit in
the same cache line.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-12-09 11:40:14 +01:00
parent e81bcda529
commit a676854f34
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
include/exec/memory.h
View File

@ -159,27 +159,32 @@ typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
struct MemoryRegion { struct MemoryRegion {
Object parent_obj; Object parent_obj;
/* All fields are private - violators will be prosecuted */ /* All fields are private - violators will be prosecuted */
const MemoryRegionOps *ops;
/* The following fields should fit in a cache line */
bool romd_mode;
bool ram;
bool subpage;
bool readonly; /* For RAM regions */
bool rom_device;
bool flush_coalesced_mmio;
bool global_locking;
uint8_t dirty_log_mask;
ram_addr_t ram_addr;
const MemoryRegionIOMMUOps *iommu_ops; const MemoryRegionIOMMUOps *iommu_ops;
const MemoryRegionOps *ops;
void *opaque; void *opaque;
MemoryRegion *container; MemoryRegion *container;
Int128 size; Int128 size;
hwaddr addr; hwaddr addr;
void (*destructor)(MemoryRegion *mr); void (*destructor)(MemoryRegion *mr);
ram_addr_t ram_addr;
uint64_t align; uint64_t align;
bool subpage;
bool terminates; bool terminates;
bool romd_mode;
bool ram;
bool skip_dump; bool skip_dump;
bool readonly; /* For RAM regions */
bool enabled; bool enabled;
bool rom_device;
bool warning_printed; /* For reservations */ bool warning_printed; /* For reservations */
bool flush_coalesced_mmio;
bool global_locking;
uint8_t vga_logging_count; uint8_t vga_logging_count;
MemoryRegion *alias; MemoryRegion *alias;
hwaddr alias_offset; hwaddr alias_offset;
@ -189,7 +194,6 @@ struct MemoryRegion {
QTAILQ_ENTRY(MemoryRegion) subregions_link; QTAILQ_ENTRY(MemoryRegion) subregions_link;
QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced; QTAILQ_HEAD(coalesced_ranges, CoalescedMemoryRange) coalesced;
const char *name; const char *name;
uint8_t dirty_log_mask;
unsigned ioeventfd_nb; unsigned ioeventfd_nb;
MemoryRegionIoeventfd *ioeventfds; MemoryRegionIoeventfd *ioeventfds;
NotifierList iommu_notify; NotifierList iommu_notify;