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ram: iterate phase

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We only need to synchronize the bitmap when the number of dirty pages is low.
Not every time that we call the function.

Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Juan Quintela 2012-06-28 19:51:17 +02:00
parent b81e712d25
commit 00d94f3f76
1 changed files with 7 additions and 3 deletions
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8
arch_init.c
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@ -348,8 +348,6 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
int i; int i;
uint64_t expected_time; uint64_t expected_time;
memory_global_sync_dirty_bitmap(get_system_memory());
bytes_transferred_last = bytes_transferred; bytes_transferred_last = bytes_transferred;
bwidth = qemu_get_clock_ns(rt_clock); bwidth = qemu_get_clock_ns(rt_clock);
@ -398,7 +396,13 @@ static int ram_save_iterate(QEMUFile *f, void *opaque)
DPRINTF("ram_save_live: expected(" PRIu64 ") <= max(" PRIu64 ")?\n", DPRINTF("ram_save_live: expected(" PRIu64 ") <= max(" PRIu64 ")?\n",
expected_time, migrate_max_downtime()); expected_time, 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;
return expected_time <= migrate_max_downtime(); return expected_time <= migrate_max_downtime();
}
return 0;
} }
static int ram_save_complete(QEMUFile *f, void *opaque) static int ram_save_complete(QEMUFile *f, void *opaque)