From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44311) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrIWR-0001lY-Vo for qemu-devel@nongnu.org; Mon, 24 Jun 2013 21:58:27 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UrIWL-00018Q-Qy for qemu-devel@nongnu.org; Mon, 24 Jun 2013 21:58:19 -0400 Received: from e7.ny.us.ibm.com ([32.97.182.137]:53044) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UrIWL-00018L-MT for qemu-devel@nongnu.org; Mon, 24 Jun 2013 21:58:13 -0400 Received: from /spool/local by e7.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 24 Jun 2013 21:58:13 -0400 Received: from d01relay06.pok.ibm.com (d01relay06.pok.ibm.com [9.56.227.116]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id C6EB938C801A for ; Mon, 24 Jun 2013 21:58:08 -0400 (EDT) Received: from d01av03.pok.ibm.com (d01av03.pok.ibm.com [9.56.224.217]) by d01relay06.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id r5P1w9XD59179034 for ; Mon, 24 Jun 2013 21:58:09 -0400 Received: from d01av03.pok.ibm.com (loopback [127.0.0.1]) by d01av03.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id r5P1w9J1029137 for ; Mon, 24 Jun 2013 22:58:09 -0300 From: mrhines@linux.vnet.ibm.com Date: Mon, 24 Jun 2013 21:57:50 -0400 Message-Id: <1372125485-11795-1-git-send-email-mrhines@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v11 00/15] rdma: migration support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aliguori@us.ibm.com, quintela@redhat.com, knoel@redhat.com, owasserm@redhat.com, abali@us.ibm.com, mrhines@us.ibm.com, gokul@us.ibm.com, pbonzini@redhat.com, chegu_vinod@hp.com From: "Michael R. Hines" Changes since v10: Detailed breakout of required state machine changes - Fix tags. Only #13, 14, and 15 need reviews. Rest are completed. - Patch #13: allow state transitions between other states besides ACTIVE - Patch #14: introduce MIG_STATE_NONE and change MIG_STATE_SETUP transition - Patch #15: account for the time spent in MIG_STATE_SETUP through QMP Wiki: http://wiki.qemu.org/Features/RDMALiveMigration Github: git@github.com:hinesmr/qemu.git Here is a brief summary of total migration time and downtime using RDMA: Using a 40gbps infiniband link performing a worst-case stress test, using an 8GB RAM virtual machine: Using the following command: $ apt-get install stress $ stress --vm-bytes 7500M --vm 1 --vm-keep RESULTS: 1. Migration throughput: 26 gigabits/second. 2. Downtime (stop time) varies between 15 and 100 milliseconds. EFFECTS of memory registration on bulk phase round: For example, in the same 8GB RAM example with all 8GB of memory in active use and the VM itself is completely idle using the same 40 gbps infiniband link: 1. x-rdma-pin-all disabled total time: approximately 7.5 seconds @ 9.5 Gbps 2. x-rdma-pin-all enabled total time: approximately 4 seconds @ 26 Gbps These numbers would of course scale up to whatever size virtual machine you have to migrate using RDMA. Enabling this feature does *not* have any measurable affect on migration *downtime*. This is because, without this feature, all of the memory will have already been registered already in advance during the bulk round and does not need to be re-registered during the successive iteration rounds. ---------------------------------------------------------------- Michael R. Hines (15): rdma: add documentation rdma: introduce qemu_update_position() rdma: export yield_until_fd_readable() rdma: export throughput w/ MigrationStats QMP rdma: introduce qemu_file_mode_is_not_valid() rdma: export qemu_fflush() rdma: introduce ram_handle_compressed() rdma: introduce qemu_ram_foreach_block() rdma: new QEMUFileOps hooks rdma: introduce capability x-rdma-pin-all rdma: core logic rdma: send pc.ram rdma: allow state transitions between other states besides ACTIVE rdma: introduce MIG_STATE_NONE and change MIG_STATE_SETUP state transition rdma: account for the time spent in MIG_STATE_SETUP through QMP Makefile.objs | 1 + arch_init.c | 69 +- configure | 29 + docs/rdma.txt | 415 ++++++ exec.c | 9 + hmp.c | 12 +- include/block/coroutine.h | 6 + include/exec/cpu-common.h | 5 + include/migration/migration.h | 32 + include/migration/qemu-file.h | 32 + migration-rdma.c | 2819 +++++++++++++++++++++++++++++++++++++++++ migration.c | 64 +- qapi-schema.json | 21 +- qemu-coroutine-io.c | 23 + savevm.c | 114 +- 15 files changed, 3589 insertions(+), 62 deletions(-) create mode 100644 docs/rdma.txt create mode 100644 migration-rdma.c -- 1.7.10.4