From patchwork Sat Aug 29 02:52:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zheng Chuan X-Patchwork-Id: 11743895 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 1378314E5 for ; Sat, 29 Aug 2020 02:43:55 +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 E661320CC7 for ; Sat, 29 Aug 2020 02:43:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E661320CC7 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]:41810 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kBqqQ-0008OE-2o for patchwork-qemu-devel@patchwork.kernel.org; Fri, 28 Aug 2020 22:43:54 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:49570) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kBqoY-0003U1-4B for qemu-devel@nongnu.org; Fri, 28 Aug 2020 22:41:58 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4668 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 1kBqoV-0001wk-Sr for qemu-devel@nongnu.org; Fri, 28 Aug 2020 22:41:57 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.58]) by Forcepoint Email with ESMTP id 7BEC097907D4172C1D2E; Sat, 29 Aug 2020 10:41:43 +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; Sat, 29 Aug 2020 10:41:34 +0800 From: Chuan Zheng To: , , , , Subject: [PATCH v6 00/12] *** A Method for evaluating dirty page rate *** Date: Sat, 29 Aug 2020 10:52:45 +0800 Message-ID: <1598669577-76914-1-git-send-email-zhengchuan@huawei.com> X-Mailer: git-send-email 1.8.3.1 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 = 2020/08/28 22:41:44 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: alex.chen@huawei.com, ann.zhuangyanying@huawei.com, zhang.zhanghailiang@huawei.com, xiexiangyou@huawei.com, qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" v5 -> v6: fix coding style according to review use TARGET_PAGE_SIZE and TARGET_PAGE_BITS instead of self-defined macros return start-time and calc-time by qmp command v4 -> v5: fix git apply failed due to meson-build add review-by for patches in v3 v3 -> v4: use crc32 to get hash result instead of md5 add DirtyRateStatus to denote calculation status add some trace_calls to make it easier to debug fix some comments accroding to review v2 -> v3: fix size_t compile warning fix codestyle checked by checkpatch.pl v1 -> v2: use g_rand_new() to generate rand_buf move RAMBLOCK_FOREACH_MIGRATABLE into migration/ram.h add skip_sample_ramblock to filter sampled ramblock fix multi-numa vm coredump when query dirtyrate rename qapi interface and rename some structures and functions succeed to compile by appling each patch add test for migrating vm Sometimes it is neccessary to evaluate dirty page rate before migration. Users could decide whether to proceed migration based on the evaluation in case of vm performance loss due to heavy workload. Unlikey simulating dirtylog sync which could do harm on runnning vm, we provide a sample-hash method to compare hash results for samping page. In this way, it would have hardly no impact on vm performance. Evaluate the dirtypage rate both on running and migration vm. The VM specifications for migration are as follows: - VM use 4-K page; - the number of VCPU is 32; - the total memory is 32Gigabit; - use 'mempress' tool to pressurize VM(mempress 4096 1024); - migration bandwidth is 1GB/s +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | | running | migrating | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | no mempress | 4MB/s | 8MB/s (migrated success) | ------------------------------------------------------------------------------------------- | mempress 4096 1024 | 1060MB/s | 456MB/s ~ 1142MB/s (cpu throttle triggered) | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | mempress 4096 4096 | 4114MB/s | 688MB/s ~ 4132MB/s (cpu throttle triggered) | +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Test dirtyrate by qmp command like this: 1. virsh qemu-monitor-command [vmname] '{"execute":"calc-dirty-rate", "arguments": {"calc-time": [sleep-time]}}'; 2. sleep specific time which is a bit larger than sleep-time 3. virsh qemu-monitor-command [vmname] '{"execute":"query-dirty-rate"}' The qmp command returns like this: {"return":{"status":"measured","dirty-rate":374,"start-time":3718293,"calc-time":1},"id":"libvirt-15"} Further test dirtyrate by libvirt api like this: virsh getdirtyrate [vmname] [sleep-time] Chuan Zheng (12): migration/dirtyrate: setup up query-dirtyrate framwork migration/dirtyrate: add DirtyRateStatus to denote calculation status migration/dirtyrate: Add RamblockDirtyInfo to store sampled page info migration/dirtyrate: Add dirtyrate statistics series functions migration/dirtyrate: move RAMBLOCK_FOREACH_MIGRATABLE into ram.h migration/dirtyrate: Record hash results for each sampled page migration/dirtyrate: Compare page hash results for recorded sampled page migration/dirtyrate: skip sampling ramblock with size below MIN_RAMBLOCK_SIZE migration/dirtyrate: Implement set_sample_page_period() and get_sample_page_period() migration/dirtyrate: Implement calculate_dirtyrate() function migration/dirtyrate: Implement qmp_cal_dirty_rate()/qmp_get_dirty_rate() function migration/dirtyrate: Add trace_calls to make it easier to debug migration/dirtyrate.c | 436 +++++++++++++++++++++++++++++++++++++++++++++++++ migration/dirtyrate.h | 70 ++++++++ migration/meson.build | 2 +- migration/ram.c | 11 +- migration/ram.h | 10 ++ migration/trace-events | 8 + qapi/migration.json | 67 ++++++++ 7 files changed, 593 insertions(+), 11 deletions(-) create mode 100644 migration/dirtyrate.c create mode 100644 migration/dirtyrate.h