From nobody Sun Nov 16 12:30:53 2025 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1600073922; cv=none; d=zohomail.com; s=zohoarc; b=XAjpppG9GrMXs51b96YfArO3wWFfwSpeW3C2C2DNS7cpsm2vPFdSvakvATqC5KUtesRJPTja+5UAgpTQgGNLjX7/j5gBQfmVlNi/fUB6i/0ZM3icL47aetCoQpnuGyE6Id5ywElSziQDsxoGVVQOurDoYMN/p5kcTC1ODxL07hs= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1600073922; h=Content-Type:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=OSYsPTnINCEIWvf+D7iISovu/K/phFUpmQSPwonOjrE=; b=E+XsSNA1ESom781p7bc3iBucGVGdfx41cFoibsf8JMQXDHiRPPkSRJlscPYgaB352DSj+i5nQa1uxbPasgBxYDXKab6p+jZ7r8lcnBetuUm13FuZlWQ9pTjEO0LIamWOedshlmZ0x5CTHHpU3X6i8WS2EWzRuE/vALFGFW+UiZI= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1600073922340360.84500388231754; Mon, 14 Sep 2020 01:58:42 -0700 (PDT) Received: from localhost ([::1]:46602 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kHkJt-0000fN-6q for importer@patchew.org; Mon, 14 Sep 2020 04:58:41 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42312) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kHkE2-00064i-PO for qemu-devel@nongnu.org; Mon, 14 Sep 2020 04:52:38 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4689 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 1kHkDw-0005kd-DA for qemu-devel@nongnu.org; Mon, 14 Sep 2020 04:52:38 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 3730F9C1835DB7782715; Mon, 14 Sep 2020 16:52:26 +0800 (CST) Received: from huawei.com (10.175.101.6) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Mon, 14 Sep 2020 16:52:19 +0800 From: Chuan Zheng To: , , , Subject: [PATCH v8 06/12] migration/dirtyrate: Record hash results for each sampled page Date: Mon, 14 Sep 2020 17:02:59 +0800 Message-ID: <1600074185-91624-7-git-send-email-zhengchuan@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1600074185-91624-1-git-send-email-zhengchuan@huawei.com> References: <1600074185-91624-1-git-send-email-zhengchuan@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.101.6] X-CFilter-Loop: Reflected Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=45.249.212.190; envelope-from=zhengchuan@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/14 04:52:27 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: zhengchuan@huawei.com, zhang.zhanghailiang@huawei.com, yuxiating@huawei.com, liq3ea@gmail.com, qemu-devel@nongnu.org, xiexiangyou@huawei.com, alex.chen@huawei.com, jinyan12@huawei.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Record hash results for each sampled page, crc32 is taken to calculate hash results for each sampled length in TARGET_PAGE_SIZE. Signed-off-by: Chuan Zheng Signed-off-by: YanYing Zhuang Reviewed-by: David Edmondson --- migration/dirtyrate.c | 111 ++++++++++++++++++++++++++++++++++++++++++++++= ++++ 1 file changed, 111 insertions(+) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index cf2d560..beb18cb 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -10,6 +10,7 @@ * See the COPYING file in the top-level directory. */ =20 +#include #include "qemu/osdep.h" #include "qapi/error.h" #include "cpu.h" @@ -68,6 +69,116 @@ static void update_dirtyrate(uint64_t msec) DirtyStat.dirty_rate =3D dirtyrate; } =20 +/* + * get hash result for the sampled memory with length of TARGET_PAGE_SIZE + * in ramblock, which starts from ramblock base address. + */ +static uint32_t get_ramblock_vfn_hash(struct RamblockDirtyInfo *info, + uint64_t vfn) +{ + uint32_t crc; + + crc =3D crc32(0, (info->ramblock_addr + + vfn * TARGET_PAGE_SIZE), TARGET_PAGE_SIZE); + + return crc; +} + +static bool save_ramblock_hash(struct RamblockDirtyInfo *info) +{ + unsigned int sample_pages_count; + int i; + GRand *rand; + + sample_pages_count =3D info->sample_pages_count; + + /* ramblock size less than one page, return success to skip this rambl= ock */ + if (unlikely(info->ramblock_pages =3D=3D 0 || sample_pages_count =3D= =3D 0)) { + return true; + } + + info->hash_result =3D g_try_malloc0_n(sample_pages_count, + sizeof(uint32_t)); + if (!info->hash_result) { + return false; + } + + info->sample_page_vfn =3D g_try_malloc0_n(sample_pages_count, + sizeof(uint64_t)); + if (!info->sample_page_vfn) { + g_free(info->hash_result); + return false; + } + + rand =3D g_rand_new(); + for (i =3D 0; i < sample_pages_count; i++) { + info->sample_page_vfn[i] =3D g_rand_int_range(rand, 0, + info->ramblock_pages -= 1); + info->hash_result[i] =3D get_ramblock_vfn_hash(info, + info->sample_page_vfn= [i]); + } + g_rand_free(rand); + + return true; +} + +static void get_ramblock_dirty_info(RAMBlock *block, + struct RamblockDirtyInfo *info, + struct DirtyRateConfig *config) +{ + uint64_t sample_pages_per_gigabytes =3D config->sample_pages_per_gigab= ytes; + + /* Right shift 30 bits to calc ramblock size in GB */ + info->sample_pages_count =3D (qemu_ram_get_used_length(block) * + sample_pages_per_gigabytes) >> 30; + /* Right shift TARGET_PAGE_BITS to calc page count */ + info->ramblock_pages =3D qemu_ram_get_used_length(block) >> + TARGET_PAGE_BITS; + info->ramblock_addr =3D qemu_ram_get_host_addr(block); + strcpy(info->idstr, qemu_ram_get_idstr(block)); +} + +static bool record_ramblock_hash_info(struct RamblockDirtyInfo **block_din= fo, + struct DirtyRateConfig config, + int *block_index) +{ + struct RamblockDirtyInfo *info =3D NULL; + struct RamblockDirtyInfo *dinfo =3D NULL; + RAMBlock *block =3D NULL; + int total_index =3D 0; + int index =3D 0; + bool ret =3D true; + + RAMBLOCK_FOREACH_MIGRATABLE(block) { + total_index++; + } + + dinfo =3D g_try_malloc0_n(total_index, sizeof(struct RamblockDirtyInfo= )); + if (dinfo =3D=3D NULL) { + total_index =3D 0; + ret =3D false; + goto out; + } + + RAMBLOCK_FOREACH_MIGRATABLE(block) { + if (index >=3D total_index) { + break; + } + info =3D &dinfo[index]; + get_ramblock_dirty_info(block, info, &config); + if (!save_ramblock_hash(info)) { + ret =3D false; + goto out; + } + index++; + } + +out: + *block_index =3D total_index; + *block_dinfo =3D dinfo; + return ret; +} + static void calculate_dirtyrate(struct DirtyRateConfig config) { /* todo */ --=20 1.8.3.1