#include <sys/mman.h>
#endif
#include "config.h"
-#include "monitor.h"
-#include "sysemu.h"
-#include "arch_init.h"
+#include "monitor/monitor.h"
+#include "sysemu/sysemu.h"
+#include "qemu/bitops.h"
+#include "qemu/bitmap.h"
+#include "sysemu/arch_init.h"
#include "audio/audio.h"
#include "hw/pc.h"
-#include "hw/pci.h"
+#include "hw/pci/pci.h"
#include "hw/audiodev.h"
-#include "kvm.h"
-#include "migration.h"
-#include "net.h"
-#include "gdbstub.h"
+#include "sysemu/kvm.h"
+#include "migration/migration.h"
+#include "exec/gdbstub.h"
#include "hw/smbios.h"
-#include "exec-memory.h"
+#include "exec/address-spaces.h"
#include "hw/pcspk.h"
-#include "qemu/page_cache.h"
+#include "migration/page_cache.h"
+#include "qemu/config-file.h"
#include "qmp-commands.h"
+#include "trace.h"
+#include "exec/cpu-all.h"
#ifdef DEBUG_ARCH_INIT
#define DPRINTF(fmt, ...) \
static RAMBlock *last_block;
static ram_addr_t last_offset;
+static unsigned long *migration_bitmap;
+static uint64_t migration_dirty_pages;
+static uint32_t last_version;
+
+static inline bool migration_bitmap_test_and_reset_dirty(MemoryRegion *mr,
+ ram_addr_t offset)
+{
+ bool ret;
+ int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
+
+ ret = test_and_clear_bit(nr, migration_bitmap);
+
+ if (ret) {
+ migration_dirty_pages--;
+ }
+ return ret;
+}
+
+static inline bool migration_bitmap_set_dirty(MemoryRegion *mr,
+ ram_addr_t offset)
+{
+ bool ret;
+ int nr = (mr->ram_addr + offset) >> TARGET_PAGE_BITS;
+
+ ret = test_and_set_bit(nr, migration_bitmap);
+
+ if (!ret) {
+ migration_dirty_pages++;
+ }
+ return ret;
+}
+
+static void migration_bitmap_sync(void)
+{
+ RAMBlock *block;
+ ram_addr_t addr;
+ uint64_t num_dirty_pages_init = migration_dirty_pages;
+ MigrationState *s = migrate_get_current();
+ static int64_t start_time;
+ static int64_t num_dirty_pages_period;
+ int64_t end_time;
+
+ if (!start_time) {
+ start_time = qemu_get_clock_ms(rt_clock);
+ }
+
+ trace_migration_bitmap_sync_start();
+ memory_global_sync_dirty_bitmap(get_system_memory());
+
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
+ for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
+ if (memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
+ DIRTY_MEMORY_MIGRATION)) {
+ migration_bitmap_set_dirty(block->mr, addr);
+ }
+ }
+ memory_region_reset_dirty(block->mr, 0, block->length,
+ DIRTY_MEMORY_MIGRATION);
+ }
+ trace_migration_bitmap_sync_end(migration_dirty_pages
+ - num_dirty_pages_init);
+ num_dirty_pages_period += migration_dirty_pages - num_dirty_pages_init;
+ end_time = qemu_get_clock_ms(rt_clock);
+
+ /* more than 1 second = 1000 millisecons */
+ if (end_time > start_time + 1000) {
+ s->dirty_pages_rate = num_dirty_pages_period * 1000
+ / (end_time - start_time);
+ start_time = end_time;
+ num_dirty_pages_period = 0;
+ }
+}
/*
* ram_save_block: Writes a page of memory to the stream f
ram_addr_t current_addr;
if (!block)
- block = QLIST_FIRST(&ram_list.blocks);
+ block = QTAILQ_FIRST(&ram_list.blocks);
do {
mr = block->mr;
- if (memory_region_get_dirty(mr, offset, TARGET_PAGE_SIZE,
- DIRTY_MEMORY_MIGRATION)) {
+ if (migration_bitmap_test_and_reset_dirty(mr, offset)) {
uint8_t *p;
int cont = (block == last_block) ? RAM_SAVE_FLAG_CONTINUE : 0;
- memory_region_reset_dirty(mr, offset, TARGET_PAGE_SIZE,
- DIRTY_MEMORY_MIGRATION);
-
p = memory_region_get_ram_ptr(mr) + offset;
if (is_dup_page(p)) {
offset += TARGET_PAGE_SIZE;
if (offset >= block->length) {
offset = 0;
- block = QLIST_NEXT(block, next);
+ block = QTAILQ_NEXT(block, next);
if (!block)
- block = QLIST_FIRST(&ram_list.blocks);
+ block = QTAILQ_FIRST(&ram_list.blocks);
}
} while (block != last_block || offset != last_offset);
static ram_addr_t ram_save_remaining(void)
{
- return ram_list.dirty_pages;
+ return migration_dirty_pages;
}
uint64_t ram_bytes_remaining(void)
RAMBlock *block;
uint64_t total = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next)
+ QTAILQ_FOREACH(block, &ram_list.blocks, next)
total += block->length;
return total;
}
-static int block_compar(const void *a, const void *b)
-{
- RAMBlock * const *ablock = a;
- RAMBlock * const *bblock = b;
-
- return strcmp((*ablock)->idstr, (*bblock)->idstr);
-}
-
-static void sort_ram_list(void)
-{
- RAMBlock *block, *nblock, **blocks;
- int n;
- n = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- ++n;
- }
- blocks = g_malloc(n * sizeof *blocks);
- n = 0;
- QLIST_FOREACH_SAFE(block, &ram_list.blocks, next, nblock) {
- blocks[n++] = block;
- QLIST_REMOVE(block, next);
- }
- qsort(blocks, n, sizeof *blocks, block_compar);
- while (--n >= 0) {
- QLIST_INSERT_HEAD(&ram_list.blocks, blocks[n], next);
- }
- g_free(blocks);
-}
-
static void migration_end(void)
{
- memory_global_dirty_log_stop();
+ if (migration_bitmap) {
+ memory_global_dirty_log_stop();
+ g_free(migration_bitmap);
+ migration_bitmap = NULL;
+ }
- if (migrate_use_xbzrle()) {
+ if (XBZRLE.cache) {
cache_fini(XBZRLE.cache);
g_free(XBZRLE.cache);
g_free(XBZRLE.encoded_buf);
migration_end();
}
+static void reset_ram_globals(void)
+{
+ last_block = NULL;
+ last_offset = 0;
+ last_version = ram_list.version;
+}
+
#define MAX_WAIT 50 /* ms, half buffered_file limit */
static int ram_save_setup(QEMUFile *f, void *opaque)
{
- ram_addr_t addr;
RAMBlock *block;
+ int64_t ram_pages = last_ram_offset() >> TARGET_PAGE_BITS;
+ migration_bitmap = bitmap_new(ram_pages);
+ bitmap_set(migration_bitmap, 0, ram_pages);
+ migration_dirty_pages = ram_pages;
+
+ qemu_mutex_lock_ramlist();
bytes_transferred = 0;
- last_block = NULL;
- last_offset = 0;
- sort_ram_list();
+ reset_ram_globals();
if (migrate_use_xbzrle()) {
XBZRLE.cache = cache_init(migrate_xbzrle_cache_size() /
acct_clear();
}
- /* Make sure all dirty bits are set */
- QLIST_FOREACH(block, &ram_list.blocks, next) {
- for (addr = 0; addr < block->length; addr += TARGET_PAGE_SIZE) {
- if (!memory_region_get_dirty(block->mr, addr, TARGET_PAGE_SIZE,
- DIRTY_MEMORY_MIGRATION)) {
- memory_region_set_dirty(block->mr, addr, TARGET_PAGE_SIZE);
- }
- }
- }
-
memory_global_dirty_log_start();
+ migration_bitmap_sync();
qemu_put_be64(f, ram_bytes_total() | RAM_SAVE_FLAG_MEM_SIZE);
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
qemu_put_byte(f, strlen(block->idstr));
qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr));
qemu_put_be64(f, block->length);
}
+ qemu_mutex_unlock_ramlist();
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
return 0;
double bwidth = 0;
int ret;
int i;
- uint64_t expected_time;
+ uint64_t expected_downtime;
+ MigrationState *s = migrate_get_current();
+
+ qemu_mutex_lock_ramlist();
+
+ if (ram_list.version != last_version) {
+ reset_ram_globals();
+ }
bytes_transferred_last = bytes_transferred;
bwidth = qemu_get_clock_ns(rt_clock);
bwidth = qemu_get_clock_ns(rt_clock) - bwidth;
bwidth = (bytes_transferred - bytes_transferred_last) / bwidth;
- /* if we haven't transferred anything this round, force expected_time to a
- * a very high value, but without crashing */
+ /* if we haven't transferred anything this round, force
+ * expected_downtime to a very high value, but without
+ * crashing */
if (bwidth == 0) {
bwidth = 0.000001;
}
+ qemu_mutex_unlock_ramlist();
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
- expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
-
- DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(%" PRIu64 ")?\n",
- expected_time, migrate_max_downtime());
+ expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+ DPRINTF("ram_save_live: expected(%" PRIu64 ") <= max(" PRIu64 ")?\n",
+ expected_downtime, migrate_max_downtime());
- if (expected_time <= migrate_max_downtime()) {
- memory_global_sync_dirty_bitmap(get_system_memory());
- expected_time = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+ if (expected_downtime <= migrate_max_downtime()) {
+ migration_bitmap_sync();
+ expected_downtime = ram_save_remaining() * TARGET_PAGE_SIZE / bwidth;
+ s->expected_downtime = expected_downtime / 1000000; /* ns -> ms */
- return expected_time <= migrate_max_downtime();
+ return expected_downtime <= migrate_max_downtime();
}
return 0;
}
static int ram_save_complete(QEMUFile *f, void *opaque)
{
- memory_global_sync_dirty_bitmap(get_system_memory());
+ migration_bitmap_sync();
+
+ qemu_mutex_lock_ramlist();
/* try transferring iterative blocks of memory */
}
bytes_transferred += bytes_sent;
}
- memory_global_dirty_log_stop();
+ migration_end();
+ qemu_mutex_unlock_ramlist();
qemu_put_be64(f, RAM_SAVE_FLAG_EOS);
return 0;
qemu_get_buffer(f, (uint8_t *)id, len);
id[len] = 0;
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
if (!strncmp(id, block->idstr, sizeof(id)))
return memory_region_get_ram_ptr(block->mr) + offset;
}
id[len] = 0;
length = qemu_get_be64(f);
- QLIST_FOREACH(block, &ram_list.blocks, next) {
+ QTAILQ_FOREACH(block, &ram_list.blocks, next) {
if (!strncmp(id, block->idstr, sizeof(id))) {
if (block->length != length) {
ret = -EINVAL;
memset(host, ch, TARGET_PAGE_SIZE);
#ifndef _WIN32
if (ch == 0 &&
- (!kvm_enabled() || kvm_has_sync_mmu())) {
+ (!kvm_enabled() || kvm_has_sync_mmu()) &&
+ getpagesize() <= TARGET_PAGE_SIZE) {
qemu_madvise(host, TARGET_PAGE_SIZE, QEMU_MADV_DONTNEED);
}
#endif
projects / qemu.git / blobdiff