From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1NeQmA-0003li-Ol for qemu-devel@nongnu.org; Mon, 08 Feb 2010 05:23:30 -0500 Received: from [199.232.76.173] (port=36987 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1NeQmA-0003lV-6x for qemu-devel@nongnu.org; Mon, 08 Feb 2010 05:23:30 -0500 Received: from Debian-exim by monty-python.gnu.org with spam-scanned (Exim 4.60) (envelope-from ) id 1NeQm1-0000FI-4u for qemu-devel@nongnu.org; Mon, 08 Feb 2010 05:23:29 -0500 Received: from tama50.ecl.ntt.co.jp ([129.60.39.147]:38669) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1NeQly-0000E5-2K for qemu-devel@nongnu.org; Mon, 08 Feb 2010 05:23:19 -0500 Message-ID: <4B6FE5E8.3070003@lab.ntt.co.jp> Date: Mon, 08 Feb 2010 19:22:32 +0900 From: OHMURA Kei MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-2022-JP Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [PATCH 3/3] qemu-kvm: Change the methods of get dirty pages. List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kvm@vger.kernel.org, qemu-devel@nongnu.org Cc: Jan Kiszka , ohmura.kei@lab.ntt.co.jp, avi@redhat.com Get number of the dirty and non-dirty pages using cpu_physical_memory_get_{dirty|non_dirty}_range(). Signed-off-by: OHMURA Kei --- vl.c | 57 ++++++++++++++++++++++++++++++++++++++------------------- 1 files changed, 38 insertions(+), 19 deletions(-) diff --git a/vl.c b/vl.c index 4ef6a78..0835da6 100644 --- a/vl.c +++ b/vl.c @@ -2798,7 +2798,7 @@ static int ram_save_block(QEMUFile *f) static ram_addr_t current_addr = 0; ram_addr_t saved_addr = current_addr; ram_addr_t addr = 0; - int found = 0; + int i, found = 0, skip = 0; while (addr < last_ram_offset) { if (kvm_enabled() && current_addr == 0) { @@ -2810,28 +2810,37 @@ static int ram_save_block(QEMUFile *f) return 0; } } - if (cpu_physical_memory_get_dirty(current_addr, MIGRATION_DIRTY_FLAG)) { + if ((found = cpu_physical_memory_get_dirty_range(current_addr, + last_ram_offset, MIGRATION_DIRTY_FLAG))) { uint8_t *p; - cpu_physical_memory_reset_dirty(current_addr, - current_addr + TARGET_PAGE_SIZE, - MIGRATION_DIRTY_FLAG); + for (i = 0; i < found; i++) { + ram_addr_t page_addr = current_addr + (i * TARGET_PAGE_SIZE); + cpu_physical_memory_reset_dirty(page_addr, + page_addr + TARGET_PAGE_SIZE, + MIGRATION_DIRTY_FLAG); - p = qemu_get_ram_ptr(current_addr); + p = qemu_get_ram_ptr(page_addr); - if (is_dup_page(p, *p)) { - qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_COMPRESS); - qemu_put_byte(f, *p); - } else { - qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_PAGE); - qemu_put_buffer(f, p, TARGET_PAGE_SIZE); + if (is_dup_page(p, *p)) { + qemu_put_be64(f, (page_addr) | + RAM_SAVE_FLAG_COMPRESS); + qemu_put_byte(f, *p); + } else { + qemu_put_be64(f, (page_addr) | + RAM_SAVE_FLAG_PAGE); + qemu_put_buffer(f, p, TARGET_PAGE_SIZE); + } } - found = 1; break; } - addr += TARGET_PAGE_SIZE; - current_addr = (saved_addr + addr) % last_ram_offset; + while ((skip = cpu_physical_memory_get_non_dirty_range(current_addr, + last_ram_offset, MIGRATION_DIRTY_FLAG)) != 0) { + addr += TARGET_PAGE_SIZE * skip; + current_addr = (saved_addr + addr) % last_ram_offset; + if (addr >= last_ram_offset) break; + } } return found; @@ -2841,12 +2850,22 @@ static uint64_t bytes_transferred; static ram_addr_t ram_save_remaining(void) { - ram_addr_t addr; + ram_addr_t addr = 0; ram_addr_t count = 0; + int found = 0, skip = 0; - for (addr = 0; addr < last_ram_offset; addr += TARGET_PAGE_SIZE) { - if (cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) - count++; + while (addr < last_ram_offset) { + if ((found = cpu_physical_memory_get_dirty_range(addr, + last_ram_offset, MIGRATION_DIRTY_FLAG))) { + count += found; + addr += TARGET_PAGE_SIZE * found; + } else { + while ((skip = cpu_physical_memory_get_non_dirty_range(addr, + last_ram_offset, MIGRATION_DIRTY_FLAG)) != 0) { + addr += TARGET_PAGE_SIZE * skip; + if (addr >= last_ram_offset) break; + } + } } return count; -- 1.6.3.3