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exec: pass client mask to cpu_physical_memory_set_dirty_range 

This cuts in half the cost of bitmap operations (which will become more
expensive when made atomic) during migration on non-VRAM regions.

Reviewed-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2015-03-23 11:56:01 +01:00
parent fc377bcf61
commit 58d2707e87
3 changed files with 29 additions and 27 deletions
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20
exec.c
View File

@ -1351,7 +1351,8 @@ int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp)
cpu_physical_memory_clear_dirty_range(block->offset, block->used_length);
block->used_length = newsize;
cpu_physical_memory_set_dirty_range(block->offset, block->used_length);
cpu_physical_memory_set_dirty_range(block->offset, block->used_length,
DIRTY_CLIENTS_ALL);
memory_region_set_size(block->mr, newsize);
if (block->resized) {
block->resized(block->idstr, newsize, block->host);
@ -1425,7 +1426,8 @@ static ram_addr_t ram_block_add(RAMBlock *new_block, Error **errp)
}
}
cpu_physical_memory_set_dirty_range(new_block->offset,
new_block->used_length);
new_block->used_length,
DIRTY_CLIENTS_ALL);
if (new_block->host) {
qemu_ram_setup_dump(new_block->host, new_block->max_length);
@ -1813,7 +1815,11 @@ static void notdirty_mem_write(void *opaque, hwaddr ram_addr,
default:
abort();
}
cpu_physical_memory_set_dirty_range_nocode(ram_addr, size);
/* Set both VGA and migration bits for simplicity and to remove
* the notdirty callback faster.
*/
cpu_physical_memory_set_dirty_range(ram_addr, size,
DIRTY_CLIENTS_NOCODE);
/* we remove the notdirty callback only if the code has been
flushed */
if (!cpu_physical_memory_is_clean(ram_addr)) {
@ -2259,9 +2265,7 @@ static void invalidate_and_set_dirty(MemoryRegion *mr, hwaddr addr,
tb_invalidate_phys_range(addr, addr + length);
dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE);
}
if (dirty_log_mask) {
cpu_physical_memory_set_dirty_range_nocode(addr, length);
}
cpu_physical_memory_set_dirty_range(addr, length, dirty_log_mask);
} else {
xen_modified_memory(addr, length);
}
@ -3014,9 +3018,7 @@ void address_space_stl_notdirty(AddressSpace *as, hwaddr addr, uint32_t val,
dirty_log_mask = memory_region_get_dirty_log_mask(mr);
dirty_log_mask &= ~(1 << DIRTY_MEMORY_CODE);
if (dirty_log_mask) {
cpu_physical_memory_set_dirty_range_nocode(addr1, 4);
}
cpu_physical_memory_set_dirty_range(addr1, 4, dirty_log_mask);
r = MEMTX_OK;
}
if (result) {

33
include/exec/ram_addr.h
View File

@ -41,6 +41,9 @@ void qemu_ram_free_from_ptr(ram_addr_t addr);
int qemu_ram_resize(ram_addr_t base, ram_addr_t newsize, Error **errp);
#define DIRTY_CLIENTS_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
#define DIRTY_CLIENTS_NOCODE (DIRTY_CLIENTS_ALL & ~(1 << DIRTY_MEMORY_CODE))
static inline bool cpu_physical_memory_get_dirty(ram_addr_t start,
ram_addr_t length,
unsigned client)
@ -103,28 +106,23 @@ static inline void cpu_physical_memory_set_dirty_flag(ram_addr_t addr,
set_bit(addr >> TARGET_PAGE_BITS, ram_list.dirty_memory[client]);
}
static inline void cpu_physical_memory_set_dirty_range_nocode(ram_addr_t start,
ram_addr_t length)
{
unsigned long end, page;
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
xen_modified_memory(start, length);
}
static inline void cpu_physical_memory_set_dirty_range(ram_addr_t start,
ram_addr_t length)
ram_addr_t length,
uint8_t mask)
{
unsigned long end, page;
end = TARGET_PAGE_ALIGN(start + length) >> TARGET_PAGE_BITS;
page = start >> TARGET_PAGE_BITS;
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
if (likely(mask & (1 << DIRTY_MEMORY_MIGRATION))) {
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end - page);
}
if (unlikely(mask & (1 << DIRTY_MEMORY_VGA))) {
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
}
if (unlikely(mask & (1 << DIRTY_MEMORY_CODE))) {
bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_CODE], page, end - page);
}
xen_modified_memory(start, length);
}
@ -172,7 +170,8 @@ static inline void cpu_physical_memory_set_dirty_lebitmap(unsigned long *bitmap,
addr = page_number * TARGET_PAGE_SIZE;
ram_addr = start + addr;
cpu_physical_memory_set_dirty_range(ram_addr,
TARGET_PAGE_SIZE * hpratio);
TARGET_PAGE_SIZE * hpratio,
DIRTY_CLIENTS_ALL);
} while (c != 0);
}
}

3
memory.c
View File

@ -1461,7 +1461,8 @@ void memory_region_set_dirty(MemoryRegion *mr, hwaddr addr,
hwaddr size)
{
assert(mr->terminates);
cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size);
cpu_physical_memory_set_dirty_range(mr->ram_addr + addr, size,
memory_region_get_dirty_log_mask(mr));
}
bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,