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[Qemu-devel] [PATCH 13/22] exec: pass client mask to cpu_physical_memory
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 13/22] exec: pass client mask to cpu_physical_memory_set_dirty_range |
Date: |
Thu, 26 Mar 2015 18:38:31 +0100 |
This cuts in half the cost of bitmap operations (which will become more
expensive when made atomic) during migration on non-VRAM regions.
Signed-off-by: Paolo Bonzini <address@hidden>
---
exec.c | 23 +++++++++++++----------
include/exec/ram_addr.h | 33 ++++++++++++++++-----------------
memory.c | 3 ++-
3 files changed, 31 insertions(+), 28 deletions(-)
diff --git a/exec.c b/exec.c
index ab2468b..94b7644 100644
--- a/exec.c
+++ b/exec.c
@@ -1356,7 +1356,8 @@ 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_CLIENT_ALL);
memory_region_set_size(block->mr, newsize);
if (block->resized) {
block->resized(block->idstr, newsize, block->host);
@@ -1430,7 +1431,8 @@ 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_CLIENT_ALL);
if (new_block->host) {
qemu_ram_setup_dump(new_block->host, new_block->max_length);
@@ -1820,7 +1822,12 @@ 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_CLIENT_NOCODE);
tlb_set_dirty(env, current_cpu->mem_io_vaddr);
}
@@ -2230,14 +2237,12 @@ static void invalidate_and_set_dirty(MemoryRegion *mr,
hwaddr addr,
hwaddr length)
{
if (cpu_physical_memory_range_includes_clean(addr, length)) {
- dirty_log_mask = memory_region_is_logging(mr);
+ uint8_t dirty_log_mask = memory_region_is_logging(mr);
if (dirty_log_mask & (1 << DIRTY_MEMORY_CODE)) {
tb_invalidate_phys_range(addr, addr + length, 0);
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);
}
@@ -2865,9 +2870,7 @@ void stl_phys_notdirty(AddressSpace *as, hwaddr addr,
uint32_t val)
tb_invalidate_phys_page_range(addr1, addr1 + 4, 0);
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);
}
}
diff --git a/include/exec/ram_addr.h b/include/exec/ram_addr.h
index 7f6e928..6c3b74e 100644
--- a/include/exec/ram_addr.h
+++ b/include/exec/ram_addr.h
@@ -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_CLIENT_ALL ((1 << DIRTY_MEMORY_NUM) - 1)
+#define DIRTY_CLIENT_NOCODE (DIRTY_CLIENT_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 & DIRTY_MEMORY_MIGRATION)) {
+ bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_MIGRATION], page, end -
page);
+ }
+ if (unlikely(mask & DIRTY_MEMORY_VGA)) {
+ bitmap_set(ram_list.dirty_memory[DIRTY_MEMORY_VGA], page, end - page);
+ }
+ if (unlikely(mask & 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_CLIENT_ALL);
} while (c != 0);
}
}
diff --git a/memory.c b/memory.c
index 76da05b..6061b27 100644
--- a/memory.c
+++ b/memory.c
@@ -1380,7 +1380,8 @@ 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_is_logging(mr));
}
bool memory_region_test_and_clear_dirty(MemoryRegion *mr, hwaddr addr,
--
2.3.3
- [Qemu-devel] [PATCH 04/22] display: enable DIRTY_MEMORY_VGA tracking explicitly, (continued)
- [Qemu-devel] [PATCH 04/22] display: enable DIRTY_MEMORY_VGA tracking explicitly, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 07/22] ui/console: check memory_region_is_logging, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 05/22] memory: return bitmap from memory_region_is_logging, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 09/22] memory: return DIRTY_MEMORY_MIGRATION from memory_region_is_logging, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 12/22] exec: use memory_region_is_logging to optimize dirty tracking, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 06/22] framebuffer: check memory_region_is_logging, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 10/22] ram_addr: tweaks to xen_modified_memory, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 08/22] memory: track DIRTY_MEMORY_CODE in mr->dirty_log_mask, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 13/22] exec: pass client mask to cpu_physical_memory_set_dirty_range,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 11/22] exec: simplify notdirty_mem_write, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 14/22] exec: only check relevant bitmaps for cleanliness, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 15/22] memory: do not touch code dirty bitmap unless TCG is enabled, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 17/22] bitmap: add atomic test and clear, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 18/22] memory: use atomic ops for setting dirty memory bits, Paolo Bonzini, 2015/03/26
- [Qemu-devel] [PATCH 16/22] bitmap: add atomic set functions, Paolo Bonzini, 2015/03/26