From patchwork Sat Jul 25 03:11:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Chuan X-Patchwork-Id: 277454 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0D285C433E0 for ; Sat, 25 Jul 2020 03:02:25 +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 D8AC2206EB for ; Sat, 25 Jul 2020 03:02:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D8AC2206EB 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+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50454 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jzAS8-00072V-1g for qemu-devel@archiver.kernel.org; Fri, 24 Jul 2020 23:02:24 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59608) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jzAPU-00024h-IA for qemu-devel@nongnu.org; Fri, 24 Jul 2020 22:59:40 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:33216 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 1jzAPQ-0000k4-O9 for qemu-devel@nongnu.org; Fri, 24 Jul 2020 22:59:40 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 6460547A05F38BF80556; Sat, 25 Jul 2020 10:59:28 +0800 (CST) Received: from huawei.com (10.175.101.6) by DGGEMS408-HUB.china.huawei.com (10.3.19.208) with Microsoft SMTP Server id 14.3.487.0; Sat, 25 Jul 2020 10:59:22 +0800 From: Chuan Zheng To: , Subject: [RFC PATCH 4/8] migration/dirtyrate: Record hash results for each ramblock Date: Sat, 25 Jul 2020 11:11:05 +0800 Message-ID: <1595646669-109310-5-git-send-email-zhengchuan@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1595646669-109310-1-git-send-email-zhengchuan@huawei.com> References: <1595646669-109310-1-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=45.249.212.35; envelope-from=zhengchuan@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/07/24 22:59:28 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Zheng Chuan Record hash results for each ramblock. Signed-off-by: Zheng Chuan Signed-off-by: YanYing Zhang --- migration/dirtyrate.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++ migration/dirtyrate.h | 1 + 2 files changed, 158 insertions(+) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 6baf674..45cfc91 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -10,12 +10,27 @@ * See the COPYING file in the top-level directory. */ +#include "qemu/osdep.h" +#include "qapi/error.h" +#include "crypto/hash.h" +#include "crypto/random.h" +#include "qemu/config-file.h" +#include "exec/memory.h" +#include "exec/ramblock.h" +#include "exec/target_page.h" +#include "qemu/rcu_queue.h" +#include "qapi/qapi-commands-migration.h" +#include "migration.h" #include "dirtyrate.h" static uint64_t sample_pages_per_gigabytes = DIRTYRATE_DEFAULT_SAMPLE_PAGES; static struct dirtyrate_statistics dirty_stat; CalculatingDirtyRateStage calculating_dirty_rate_stage = CAL_DIRTY_RATE_INIT; +#define RAMBLOCK_FOREACH_MIGRATABLE(block) \ + INTERNAL_RAMBLOCK_FOREACH(block) \ + if (!qemu_ram_is_migratable(block)) {} else + static void reset_dirtyrate_stat(void) { dirty_stat.total_dirty_samples = 0; @@ -44,6 +59,148 @@ static void update_dirtyrate(int64_t msec) dirty_stat.dirty_rate = dirty_rate; } +static int get_block_vfn_hash(struct block_dirty_info *info, unsigned long vfn, + uint8_t **md, size_t *hash_len) +{ + struct iovec iov_array; + int ret = 0; + int nkey = 1; + + iov_array.iov_base = info->block_addr + + vfn * DIRTYRATE_SAMPLE_PAGE_SIZE; + iov_array.iov_len = DIRTYRATE_SAMPLE_PAGE_SIZE; + + if (qcrypto_hash_bytesv(QCRYPTO_HASH_ALG_MD5, + &iov_array, nkey, + md, hash_len, NULL) < 0) { + ret = -1; + } + + return ret; +} + +static int save_block_hash(struct block_dirty_info *info) +{ + unsigned long *rand_buf = NULL; + unsigned int sample_pages_count; + uint8_t *md = NULL; + size_t hash_len; + int i; + int ret = -1; + + sample_pages_count = info->sample_pages_count; + /* block size less than one page, return success to skip this block */ + if (unlikely(info->block_pages == 0 || sample_pages_count == 0)) { + ret = 0; + goto out; + } + + /* use random bytes to pick sample page vfn */ + rand_buf = g_malloc0_n(sample_pages_count, sizeof(unsigned long)); + /* DEFAULT_READ_RANDOM_MAX_LIMIT 32M, + * can support 4T vm 1024 sample_pages_per_gigabytes + */ + ret = qcrypto_random_bytes((unsigned char *)rand_buf, + sample_pages_count * sizeof(unsigned long), + NULL); + if (ret) { + ret = -1; + goto out; + } + + hash_len = qcrypto_hash_digest_len(QCRYPTO_HASH_ALG_MD5); + info->hash_result = g_malloc0_n(sample_pages_count, sizeof(uint8_t) * hash_len); + info->sample_page_vfn = g_malloc0_n(sample_pages_count, sizeof(unsigned long)); + + for (i = 0; i < sample_pages_count; i++) { + md = info->hash_result + i * hash_len; + info->sample_page_vfn[i] = rand_buf[i] % info->block_pages; + ret = get_block_vfn_hash(info, info->sample_page_vfn[i], &md, &hash_len); + if (ret < 0) { + goto out; + } + } + ret = 0; +out: + g_free(rand_buf); + return ret; +} + +static void get_block_dirty_info(RAMBlock *block, struct block_dirty_info *info, + struct dirtyrate_config *config) +{ + uint64_t sample_pages_per_gigabytes = config->sample_pages_per_gigabytes; + + /* Right shift 30 bits to calc block size in GB */ + info->sample_pages_count = (qemu_ram_get_used_length(block) * sample_pages_per_gigabytes) >> 30; + + info->block_pages = qemu_ram_get_used_length(block) >> DIRTYRATE_PAGE_SIZE_SHIFT; + info->block_addr = qemu_ram_get_host_addr(block); + strcpy(info->idstr, qemu_ram_get_idstr(block)); +} + +static struct block_dirty_info * +alloc_block_dirty_info(int *block_index, + struct block_dirty_info *block_dinfo) +{ + struct block_dirty_info *info = NULL; + int index = *block_index; + + if (!block_dinfo) { + block_dinfo = g_new(struct block_dirty_info, 1); + index = 0; + } else { + block_dinfo = g_realloc(block_dinfo, (index + 1) * + sizeof(struct block_dirty_info)); + index++; + } + info = &block_dinfo[index]; + memset(info, 0, sizeof(struct block_dirty_info)); + + *block_index = index; + return block_dinfo; +} + +static int ram_block_skip(RAMBlock *block) +{ + if (!strstr(qemu_ram_get_idstr(block), "ram-node") && + !strstr(qemu_ram_get_idstr(block), "memdimm")) { + if (strcmp(qemu_ram_get_idstr(block), "mach-virt.ram") || + strcmp(block->idstr, "pc.ram")) { + return -1; + } + } + + return 0; +} + +static int record_block_hash_info(struct dirtyrate_config config, + struct block_dirty_info **block_dinfo, int *block_index) +{ + struct block_dirty_info *info = NULL; + struct block_dirty_info *dinfo = NULL; + RAMBlock *block = NULL; + int index = 0; + + RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (ram_block_skip(block) < 0) { + continue; + } + dinfo = alloc_block_dirty_info(&index, dinfo); + info = &dinfo[index]; + get_block_dirty_info(block, info, &config); + if (save_block_hash(info) < 0) { + *block_dinfo = dinfo; + *block_index = index; + return -1; + } + } + + *block_dinfo = dinfo; + *block_index = index; + + return 0; +} static void calculate_dirtyrate(struct dirtyrate_config config, int64_t time) { diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h index 2994535..4d9b3b8 100644 --- a/migration/dirtyrate.h +++ b/migration/dirtyrate.h @@ -15,6 +15,7 @@ /* take 256 pages per GB for cal dirty rate */ #define DIRTYRATE_DEFAULT_SAMPLE_PAGES 256 +#define DIRTYRATE_SAMPLE_PAGE_SIZE 4096 #define DIRTYRATE_PAGE_SIZE_SHIFT 12 #define BLOCK_INFO_MAX_LEN 256 #define PAGE_SIZE_SHIFT 20