From nobody Sat Nov 15 17:43:55 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=1595646225; cv=none; d=zohomail.com; s=zohoarc; b=mhRtm8VTIlcQFUz/wjmz70qUrrcZL1v5fhKqN+P1LLGrZorGn4SGecEQSXI++lxRHVAyqjI10J8w4aNP0QytGNSaB3w2Tmmm8LIJk27hP/v3WjNyAkFfpRI/YOhnyHfTAUbkZPVWkF37l3bcQJCVcSmqAZSgQwTVJxQu8RLL4/w= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1595646225; 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=g3w+5f3a8Yu6x3PO1wOa79xE4unEKHHEb/sqakGcKec=; b=fmKv0RS6P2G27V4OEbE4pFNc/nqxyivfIEV34B9RTYHlRRedF79nnu8KzX86sv1WgQ2WY7z9uUGCCs3V93ARrHj83OVJ4+7vBHBHz0ED3ruVRYQepoL/PqxJoJHVyRKHO2DRxeGAFOwfDflOCFjYmehougMMzF3x+R4ExzJ0FV8= 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 1595646225081634.0089152739247; Fri, 24 Jul 2020 20:03:45 -0700 (PDT) Received: from localhost ([::1]:56800 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jzATP-000197-R0 for importer@patchew.org; Fri, 24 Jul 2020 23:03:43 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:59642) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jzAPV-000273-Ra for qemu-devel@nongnu.org; Fri, 24 Jul 2020 22:59:41 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4157 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-0000l7-Sd for qemu-devel@nongnu.org; Fri, 24 Jul 2020 22:59:41 -0400 Received: from DGGEMS408-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 495B34E2B397365D759E; Sat, 25 Jul 2020 10:59:33 +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 10:59:23 +0800 From: Chuan Zheng To: , Subject: [RFC PATCH 6/8] migration/dirtyrate: Implement get_sample_gap_period() and block_sample_gap_period() Date: Sat, 25 Jul 2020 11:11:07 +0800 Message-ID: <1595646669-109310-7-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 (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 = 2020/07/24 22:59:33 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Zheng Chuan Implement get_sample_gap_period() and block_sample_gap_period() to sleep specific time between sample actions. Signed-off-by: Zheng Chuan Signed-off-by: YanYing Zhang --- migration/dirtyrate.c | 28 ++++++++++++++++++++++++++++ migration/dirtyrate.h | 6 +++++- 2 files changed, 33 insertions(+), 1 deletion(-) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index 7badc53..00abfa7 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -295,10 +295,38 @@ static void set_dirty_rate_stage(CalculatingDirtyRate= Stage ratestage) calculating_dirty_rate_stage =3D ratestage; } =20 +static int64_t block_sample_gap_period(int64_t msec, int64_t initial_time) +{ + int64_t current_time; + + current_time =3D qemu_clock_get_ms(QEMU_CLOCK_REALTIME); + if ((current_time - initial_time) >=3D msec) { + msec =3D current_time - initial_time; + } else { + g_usleep((msec + initial_time - current_time) * 1000); + } + + return msec; +} + +static int64_t get_sample_gap_period(struct dirtyrate_config config) +{ + int64_t msec; + + msec =3D config.sample_period_seconds * 1000; + if (msec <=3D MIN_FETCH_DIRTYRATE_TIME_MSEC || msec > MAX_FETCH_DIRTYR= ATE_TIME_MSEC) { + msec =3D DEFAULT_FETCH_DIRTYRATE_TIME_MSEC; + } + return msec; +} + void *get_dirtyrate_thread(void *arg) { struct dirtyrate_config config =3D *(struct dirtyrate_config *)arg; int64_t msec =3D 0; + + /* max period is 60 seconds */ + msec =3D get_sample_gap_period(config); =20 set_dirty_rate_stage(CAL_DIRTY_RATE_ING); =20 diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h index 4d9b3b8..5aef2d7 100644 --- a/migration/dirtyrate.h +++ b/migration/dirtyrate.h @@ -14,12 +14,16 @@ #define QEMU_MIGRATION_DIRTYRATE_H =20 /* take 256 pages per GB for cal dirty rate */ -#define DIRTYRATE_DEFAULT_SAMPLE_PAGES 256 +#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 =20 +#define MIN_FETCH_DIRTYRATE_TIME_MSEC 0 +#define MAX_FETCH_DIRTYRATE_TIME_MSEC 60000 +#define DEFAULT_FETCH_DIRTYRATE_TIME_MSEC 1000 + struct dirtyrate_config { uint64_t sample_pages_per_gigabytes; int64_t sample_period_seconds; --=20 1.8.3.1