From patchwork Tue Dec 11 08:24:46 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Wei W" X-Patchwork-Id: 10723211 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 59B2C1751 for ; Tue, 11 Dec 2018 08:59:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 4551729B3B for ; Tue, 11 Dec 2018 08:59:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3670B29EB8; Tue, 11 Dec 2018 08:59:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C0FB629B3B for ; Tue, 11 Dec 2018 08:59:27 +0000 (UTC) Received: from localhost ([::1]:36613 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gWdt0-0002Sm-RM for patchwork-qemu-devel@patchwork.kernel.org; Tue, 11 Dec 2018 03:59:26 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:51578) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gWdrb-0002SS-Rm for qemu-devel@nongnu.org; Tue, 11 Dec 2018 03:58:00 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gWdrY-0006EO-GT for qemu-devel@nongnu.org; Tue, 11 Dec 2018 03:57:59 -0500 Received: from mga07.intel.com ([134.134.136.100]:27013) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gWdrY-0006Ck-6A for qemu-devel@nongnu.org; Tue, 11 Dec 2018 03:57:56 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 11 Dec 2018 00:57:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,341,1539673200"; d="scan'208";a="117803081" Received: from devel-ww.sh.intel.com ([10.239.48.119]) by orsmga001.jf.intel.com with ESMTP; 11 Dec 2018 00:57:49 -0800 From: Wei Wang To: qemu-devel@nongnu.org, virtio-dev@lists.oasis-open.org, mst@redhat.com, quintela@redhat.com, dgilbert@redhat.com, peterx@redhat.com Date: Tue, 11 Dec 2018 16:24:46 +0800 Message-Id: <1544516693-5395-1-git-send-email-wei.w.wang@intel.com> X-Mailer: git-send-email 2.7.4 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.100 Subject: [Qemu-devel] [PATCH v11 0/7] virtio-balloon: free page hint support X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, liliang.opensource@gmail.com, nilal@redhat.com, wei.w.wang@intel.com Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This is the deivce part implementation to add a new feature, VIRTIO_BALLOON_F_FREE_PAGE_HINT to the virtio-balloon device. The device receives the guest free page hints from the driver and clears the corresponding bits in the dirty bitmap, so that those free pages are not sent by the migration thread to the destination. *Tests 1 Test Environment Host: Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz Migration setup: migrate_set_speed 100G, migrate_set_downtime 400ms 2 Test Results (results are averaged over several repeated runs) 2.1 Guest setup: 8G RAM, 4 vCPU 2.1.1 Idle guest live migration time Optimization v.s. Legacy = 620ms vs 2970ms --> ~79% reduction 2.1.2 Guest live migration with Linux compilation workload (i.e. make bzImage -j4) running 1) Live Migration Time: Optimization v.s. Legacy = 2273ms v.s. 4502ms --> ~50% reduction 2) Linux Compilation Time: Optimization v.s. Legacy = 8min42s v.s. 8min43s --> no obvious difference 2.2 Guest setup: 128G RAM, 4 vCPU 2.2.1 Idle guest live migration time Optimization v.s. Legacy = 5294ms vs 41651ms --> ~87% reduction 2.2.2 Guest live migration with Linux compilation workload 1) Live Migration Time: Optimization v.s. Legacy = 8816ms v.s. 54201ms --> 84% reduction 2) Linux Compilation Time: Optimization v.s. Legacy = 8min30s v.s. 8min36s --> no obvious difference ChangeLog: v10->v11: migration: - qemu_guest_free_page_hint: - "offset >= block->used_length", instead of "offset > block->used_length"; - RAMState: enable the "fpo_enabled" flag, when the free page optimization feature is used, instead of disabling ram_bulk_stage. Please see patch 6 commit log for details. Previous changelog: http://lists.nongnu.org/archive/html/qemu-devel/2018-12/msg00055.html Wei Wang (7): bitmap: fix bitmap_count_one bitmap: bitmap_count_one_with_offset migration: use bitmap_mutex in migration_bitmap_clear_dirty migration: API to clear bits of guest free pages from the dirty bitmap migration/ram.c: add a notifier chain for precopy migration/ram.c: add the free page optimization enable flag virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT hw/virtio/virtio-balloon.c | 263 ++++++++++++++++++++++++ include/hw/virtio/virtio-balloon.h | 28 ++- include/migration/misc.h | 22 ++ include/qemu/bitmap.h | 17 ++ include/standard-headers/linux/virtio_balloon.h | 5 + migration/ram.c | 121 ++++++++++- migration/savevm.c | 15 ++ vl.c | 1 + 8 files changed, 466 insertions(+), 6 deletions(-) Reviewed-by: Michael S. Tsirkin