From patchwork Wed Jun 16 08:09:53 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshiaki Tamura X-Patchwork-Id: 55862 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [199.232.76.165]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 8CC40B7D8B for ; Wed, 16 Jun 2010 18:15:17 +1000 (EST) Received: from localhost ([127.0.0.1]:33538 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOnmE-0000b5-2Y for incoming@patchwork.ozlabs.org; Wed, 16 Jun 2010 04:15:14 -0400 Received: from [140.186.70.92] (port=35369 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OOnhY-0007Ag-2q for qemu-devel@nongnu.org; Wed, 16 Jun 2010 04:10:25 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OOnhV-0001OP-UD for qemu-devel@nongnu.org; Wed, 16 Jun 2010 04:10:23 -0400 Received: from sh.osrg.net ([192.16.179.4]:33897) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OOnhV-0001NZ-DO for qemu-devel@nongnu.org; Wed, 16 Jun 2010 04:10:21 -0400 Received: from fs.osrg.net (postfix@fs.osrg.net [10.0.0.12]) by sh.osrg.net (8.14.3/8.14.3/OSRG-NET) with ESMTP id o5G8AHPi006031; Wed, 16 Jun 2010 17:10:17 +0900 Received: from localhost (hype-wd0.osrg.net [10.72.1.16]) by fs.osrg.net (Postfix) with ESMTP id 9F1F73E02FA; Wed, 16 Jun 2010 17:10:17 +0900 (JST) From: Yoshiaki Tamura To: qemu-devel@nongnu.org Date: Wed, 16 Jun 2010 17:09:53 +0900 Message-Id: <1276675793-21262-5-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> X-Mailer: git-send-email 1.7.0.31.g1df487 In-Reply-To: <1276675793-21262-1-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> References: <1276675793-21262-1-git-send-email-tamura.yoshiaki@lab.ntt.co.jp> X-Dispatcher: imput version 20070423(IM149) Lines: 99 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (sh.osrg.net [192.16.179.4]); Wed, 16 Jun 2010 17:10:18 +0900 (JST) X-Virus-Scanned: clamav-milter 0.96.1 at sh X-Virus-Status: Clean X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2) Cc: aliguori@us.ibm.com, ohmura.kei@lab.ntt.co.jp, Yoshiaki Tamura Subject: [Qemu-devel] [PATCH v6 4/4] Use cpu_physical_memory_get_dirty_range() to check multiple dirty pages. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Modifies ram_save_block() and ram_save_remaining() to use cpu_physical_memory_get_dirty_range() to check multiple dirty and non-dirty pages at once. Signed-off-by: Yoshiaki Tamura Signed-off-by: OHMURA Kei --- arch_init.c | 58 ++++++++++++++++++++++++++++++++++++---------------------- 1 files changed, 36 insertions(+), 22 deletions(-) diff --git a/arch_init.c b/arch_init.c index eb5b67c..e0cf400 100644 --- a/arch_init.c +++ b/arch_init.c @@ -108,32 +108,39 @@ 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 bytes_sent = 0; + ram_addr_t dirty_rams[HOST_LONG_BITS]; + int i, found, bytes_sent = 0; while (addr < ram_list.last_offset) { - if (cpu_physical_memory_get_dirty(current_addr, MIGRATION_DIRTY_FLAG)) { + if ((found = cpu_physical_memory_get_dirty_range( + current_addr, ram_list.last_offset, dirty_rams, HOST_LONG_BITS, + MIGRATION_DIRTY_FLAG))) { uint8_t *p; - cpu_physical_memory_reset_dirty(current_addr, - current_addr + TARGET_PAGE_SIZE, - MIGRATION_DIRTY_FLAG); - - p = qemu_get_ram_ptr(current_addr); - - if (is_dup_page(p, *p)) { - qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_COMPRESS); - qemu_put_byte(f, *p); - bytes_sent = 1; - } else { - qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_PAGE); - qemu_put_buffer(f, p, TARGET_PAGE_SIZE); - bytes_sent = TARGET_PAGE_SIZE; + for (i = 0; i < found; i++) { + ram_addr_t page_addr = dirty_rams[i]; + cpu_physical_memory_reset_dirty(page_addr, + page_addr + TARGET_PAGE_SIZE, + MIGRATION_DIRTY_FLAG); + + p = qemu_get_ram_ptr(page_addr); + + if (is_dup_page(p, *p)) { + qemu_put_be64(f, page_addr | RAM_SAVE_FLAG_COMPRESS); + qemu_put_byte(f, *p); + bytes_sent++; + } else { + qemu_put_be64(f, page_addr | RAM_SAVE_FLAG_PAGE); + qemu_put_buffer(f, p, TARGET_PAGE_SIZE); + bytes_sent += TARGET_PAGE_SIZE; + } } break; + } else { + addr += dirty_rams[0]; + current_addr = (saved_addr + addr) % ram_list.last_offset; } - addr += TARGET_PAGE_SIZE; - current_addr = (saved_addr + addr) % ram_list.last_offset; } return bytes_sent; @@ -143,12 +150,19 @@ 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; + ram_addr_t dirty_rams[HOST_LONG_BITS]; + int found = 0; - for (addr = 0; addr < ram_list.last_offset; addr += TARGET_PAGE_SIZE) { - if (cpu_physical_memory_get_dirty(addr, MIGRATION_DIRTY_FLAG)) { - count++; + while (addr < ram_list.last_offset) { + if ((found = cpu_physical_memory_get_dirty_range( + addr, ram_list.last_offset, dirty_rams, + HOST_LONG_BITS, MIGRATION_DIRTY_FLAG))) { + count += found; + addr = dirty_rams[found - 1] + TARGET_PAGE_SIZE; + } else { + addr += dirty_rams[0]; } }