From patchwork Tue Aug 25 01:40:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Chuan X-Patchwork-Id: 275692 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=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 04AF5C433E1 for ; Tue, 25 Aug 2020 01:35:32 +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 C7A4B20738 for ; Tue, 25 Aug 2020 01:35:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C7A4B20738 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]:42836 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kANs3-00068J-4Q for qemu-devel@archiver.kernel.org; Mon, 24 Aug 2020 21:35:31 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:60704) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kANnr-0004xS-M9 for qemu-devel@nongnu.org; Mon, 24 Aug 2020 21:31:11 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4214 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 1kANnp-0005qW-6C for qemu-devel@nongnu.org; Mon, 24 Aug 2020 21:31:11 -0400 Received: from DGGEMS405-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 335EFBDBF03D4D888611; Tue, 25 Aug 2020 09:31:02 +0800 (CST) Received: from huawei.com (10.175.101.6) by DGGEMS405-HUB.china.huawei.com (10.3.19.205) with Microsoft SMTP Server id 14.3.487.0; Tue, 25 Aug 2020 09:30:54 +0800 From: Chuan Zheng To: , , , Subject: [PATCH v5 09/12] migration/dirtyrate: Implement get_sample_page_period() and block_sample_page_period() Date: Tue, 25 Aug 2020 09:40:47 +0800 Message-ID: <1598319650-36762-10-git-send-email-zhengchuan@huawei.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1598319650-36762-1-git-send-email-zhengchuan@huawei.com> References: <1598319650-36762-1-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=45.249.212.190; envelope-from=zhengchuan@huawei.com; helo=huawei.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/08/24 21:30:58 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=0.001, RCVD_IN_MSPIKE_WL=0.001, 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, qemu-devel@nongnu.org, xiexiangyou@huawei.com, 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" Implement get_sample_page_period() and set_sample_page_period() to sleep specific time between sample actions. Signed-off-by: Chuan Zheng Reviewed-by: Dr. David Alan Gilbert --- migration/dirtyrate.c | 24 ++++++++++++++++++++++++ migration/dirtyrate.h | 2 ++ 2 files changed, 26 insertions(+) diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c index bd398b7..d1c0a78 100644 --- a/migration/dirtyrate.c +++ b/migration/dirtyrate.c @@ -28,6 +28,30 @@ static int CalculatingState = DIRTY_RATE_STATUS_UNSTARTED; static struct DirtyRateStat DirtyStat; +static int64_t set_sample_page_period(int64_t msec, int64_t initial_time) +{ + int64_t current_time; + + current_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME); + if ((current_time - initial_time) >= msec) { + msec = current_time - initial_time; + } else { + g_usleep((msec + initial_time - current_time) * 1000); + } + + return msec; +} + +static int64_t get_sample_page_period(int64_t sec) +{ + if (sec <= MIN_FETCH_DIRTYRATE_TIME_SEC || + sec > MAX_FETCH_DIRTYRATE_TIME_SEC) { + sec = DEFAULT_FETCH_DIRTYRATE_TIME_SEC; + } + + return sec; +} + static int dirtyrate_set_state(int *state, int old_state, int new_state) { assert(new_state < DIRTY_RATE_STATUS__MAX); diff --git a/migration/dirtyrate.h b/migration/dirtyrate.h index 600bceb..cf14647 100644 --- a/migration/dirtyrate.h +++ b/migration/dirtyrate.h @@ -51,6 +51,8 @@ /* Take 1s as default for calculation duration */ #define DEFAULT_FETCH_DIRTYRATE_TIME_SEC 1 +#define MIN_FETCH_DIRTYRATE_TIME_SEC 0 +#define MAX_FETCH_DIRTYRATE_TIME_SEC 60 struct DirtyRateConfig { uint64_t sample_pages_per_gigabytes; /* sample pages per GB */