From patchwork Mon Aug 17 03:20:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Chuan X-Patchwork-Id: 11716355 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BD4C5913 for ; Mon, 17 Aug 2020 03:12:12 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 9E1B32063A for ; Mon, 17 Aug 2020 03:12:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9E1B32063A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Received: from localhost ([::1]:43592 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1k7VZD-0004cE-UW for patchwork-qemu-devel@patchwork.kernel.org; Sun, 16 Aug 2020 23:12:11 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37226) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7VWB-0006DS-L9 for qemu-devel@nongnu.org; Sun, 16 Aug 2020 23:09:03 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4256 helo=huawei.com) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1k7VW8-0008M0-LR for qemu-devel@nongnu.org; Sun, 16 Aug 2020 23:09:03 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id DD027E72928D3028BC1E; Mon, 17 Aug 2020 11:08:53 +0800 (CST) Received: from huawei.com (10.175.101.6) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Mon, 17 Aug 2020 11:08:45 +0800 From: Chuan Zheng To: , , Subject: [PATCH v3 06/10] migration/dirtyrate: Compare page hash results for recorded sampled page Date: Mon, 17 Aug 2020 11:20:29 +0800 Message-ID: <1597634433-18809-7-git-send-email-zhengchuan@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1597634433-18809-1-git-send-email-zhengchuan@huawei.com> References: <1597634433-18809-1-git-send-email-zhengchuan@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-CFilter-Loop: Reflected Received-SPF: pass client-ip=45.249.212.191; envelope-from=zhengchuan@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/16 23:08:53 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -41 X-Spam_score: -4.2 X-Spam_bar: ---- X-Spam_report: (-4.2 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_MSPIKE_H4=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: zhang.zhanghailiang@huawei.com, linyilu@huawei.com, qemu-devel@nongnu.org, alex.chen@huawei.com, ann.zhuangyanying@huawei.com, fangying1@huawei.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Compare page hash results for recorded sampled page. Signed-off-by: Chuan Zheng Signed-off-by: YanYing Zhuang --- migration/dirtyrate.c | 76 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 62b6f69..3ce25f5 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -215,6 +215,82 @@ static int record_ramblock_hash_info(struct RamblockDirtyInfo **block_dinfo, return 0; } +static int calc_page_dirty_rate(struct RamblockDirtyInfo *info) +{ + uint8_t *md = NULL; + int i; + int ret = 0; + + md = g_try_new0(uint8_t, qcrypto_hash_len); + if (!md) { + return -1; + } + + for (i = 0; i < info->sample_pages_count; i++) { + ret = get_ramblock_vfn_hash(info, info->sample_page_vfn[i], &md); + if (ret < 0) { + goto out; + } + + if (memcmp(md, info->hash_result + i * qcrypto_hash_len, + qcrypto_hash_len) != 0) { + info->sample_dirty_count++; + } + } + +out: + g_free(md); + return ret; +} + +static bool find_page_matched(RAMBlock *block, struct RamblockDirtyInfo *infos, + int count, struct RamblockDirtyInfo **matched) +{ + int i; + + for (i = 0; i < count; i++) { + if (!strcmp(infos[i].idstr, qemu_ram_get_idstr(block))) { + break; + } + } + + if (i == count) { + return false; + } + + if (infos[i].ramblock_addr != qemu_ram_get_host_addr(block) || + infos[i].ramblock_pages != + (qemu_ram_get_used_length(block) >> 12)) { + return false; + } + + *matched = &infos[i]; + return true; +} + +static int compare_page_hash_info(struct RamblockDirtyInfo *info, + int block_index) +{ + struct RamblockDirtyInfo *block_dinfo = NULL; + RAMBlock *block = NULL; + + RAMBLOCK_FOREACH_MIGRATABLE(block) { + block_dinfo = NULL; + if (!find_page_matched(block, info, block_index + 1, &block_dinfo)) { + continue; + } + if (calc_page_dirty_rate(block_dinfo) < 0) { + return -1; + } + update_dirtyrate_stat(block_dinfo); + } + if (!dirty_stat.total_sample_count) { + return -1; + } + + return 0; +} + static void calculate_dirtyrate(struct DirtyRateConfig config) { /* todo */