From patchwork Mon Dec 3 02:18:24 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: 10708539 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 2D4261579 for ; Mon, 3 Dec 2018 02:55:17 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 12D862A679 for ; Mon, 3 Dec 2018 02:55:17 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0674B2A7C6; Mon, 3 Dec 2018 02:55:17 +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 3F54E2A679 for ; Mon, 3 Dec 2018 02:55:16 +0000 (UTC) Received: from localhost ([::1]:46560 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTeOB-00058n-Ce for patchwork-qemu-devel@patchwork.kernel.org; Sun, 02 Dec 2018 21:55:15 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:49844) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gTeKd-0000sj-7l for qemu-devel@nongnu.org; Sun, 02 Dec 2018 21:51:36 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gTeKa-0000aB-25 for qemu-devel@nongnu.org; Sun, 02 Dec 2018 21:51:35 -0500 Received: from mga07.intel.com ([134.134.136.100]:65450) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1gTeKZ-0000Zq-PM for qemu-devel@nongnu.org; Sun, 02 Dec 2018 21:51:32 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 02 Dec 2018 18:51:29 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.56,308,1539673200"; d="scan'208";a="115254770" Received: from devel-ww.sh.intel.com ([10.239.48.119]) by FMSMGA003.fm.intel.com with ESMTP; 02 Dec 2018 18:51:27 -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: Mon, 3 Dec 2018 10:18:24 +0800 Message-Id: <1543803511-34793-1-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 v10 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: v9->v10: migration: - qemu_guest_free_page_hint: - move "addr += used_len" to the for() loop; - add some comments about the ram block resize case. - precopy notifier: - enable callbacks to report errors (as the postcopy notifier); - rename the notifier reasons: - PRECOPY_NOTIFY_COMPLETE notifies the callback about the end of precopy; - PRECOPY_NOTIFY_CLEANUP notifies the callback in the case migration is cancelled; - relocate some notifications to the upper layer functions (i.e. qemu_savevm_state_*), which can get the callbacks notified when non-ram-saving code has errors which stops the precopy. - migration_bitmap_sync_precopy to be called by the precopy code path with precopy notifier supported, and migration_bitmap_sync is left for callers without the need of precopy notifier (e.g. some postcopy code). - avoid exposing migrate_postcopy; virtio-balloon: - virtio_balloon_free_page_report_notify: remove the migrate_postcopy check becasue the migration code has guaranteed that the notifier callback is invoked when in the precopy mode. Previous changelog: https://lists.gnu.org/archive/html/qemu-devel/2018-11/msg02854.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 a function to disable the bulk stage 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 | 112 +++++++++- migration/savevm.c | 15 ++ vl.c | 1 + 8 files changed, 458 insertions(+), 5 deletions(-)