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Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support
From: |
Anthony Liguori |
Subject: |
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support |
Date: |
Tue, 23 Apr 2013 12:50:03 -0500 |
User-agent: |
Notmuch/0.15.2+77~g661dcf8 (http://notmuchmail.org) Emacs/23.3.1 (x86_64-pc-linux-gnu) |
address@hidden writes:
> From: "Michael R. Hines" <address@hidden>
>
> Juan, Please pull.
I assume this is actually v6, not v5?
I don't see collected Reviewed-bys...
That said, we're pretty close to hard freeze. I think this should wait
until 1.6 opens up although I'm open to suggestion if people think this
is low risk. I don't like the idea of adding a new protocol this close
to the end of a cycle.
Regards,
Anthony Liguori
>
> Changes since v4:
>
> - Re-ran checkpatch.pl
> - Added new QEMUFileOps function: qemu_get_max_size()
> - Renamed capability to x-pin-all, disabled by default
> - Added numbers for x-pin-all to performance section in docs/rdma.txt
> - Included performance numbers in this cover letter
> - Converted throughput patch to a MigrationStats statistic in QMP
> - Better QMP error message delivery
> - Updated documentation
> - Moved docs/rdma.txt up to top of patch series
> - Fixed all v4 changes requested
> - Finished additional cleanup requests
> - Updated copyright for migration-rdma.c
>
> Wiki: http://wiki.qemu.org/Features/RDMALiveMigration
> Github: address@hidden: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 (12):
> rdma: add documentation
> rdma: export yield_until_fd_readable()
> rdma: export throughput w/ MigrationStats QMP
> rdma: introduce qemu_get_max_size()
> 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
>
> Makefile.objs | 1 +
> arch_init.c | 59 +-
> configure | 29 +
> docs/rdma.txt | 404 ++++++
> exec.c | 9 +
> hmp.c | 2 +
> include/block/coroutine.h | 6 +
> include/exec/cpu-common.h | 5 +
> include/migration/migration.h | 24 +
> include/migration/qemu-file.h | 44 +
> migration-rdma.c | 2727
> +++++++++++++++++++++++++++++++++++++++++
> migration.c | 22 +-
> qapi-schema.json | 12 +-
> qemu-coroutine-io.c | 23 +
> savevm.c | 133 +-
> 15 files changed, 3451 insertions(+), 49 deletions(-)
> create mode 100644 docs/rdma.txt
> create mode 100644 migration-rdma.c
>
> --
> 1.7.10.4
- [Qemu-devel] [PATCH v5 08/12] rdma: introduce qemu_ram_foreach_block(), (continued)
- [Qemu-devel] [PATCH v5 08/12] rdma: introduce qemu_ram_foreach_block(), mrhines, 2013/04/22
- [Qemu-devel] [PATCH v5 10/12] rdma: introduce capability x-rdma-pin-all, mrhines, 2013/04/22
- [Qemu-devel] [PATCH v5 09/12] rdma: new QEMUFileOps hooks, mrhines, 2013/04/22
- [Qemu-devel] [PATCH v5 12/12] rdma: send pc.ram, mrhines, 2013/04/22
- [Qemu-devel] [PATCH v5 02/12] rdma: export yield_until_fd_readable(), mrhines, 2013/04/22
- [Qemu-devel] [PATCH v5 11/12] rdma: core logic, mrhines, 2013/04/22
- Re: [Qemu-devel] [PATCH v5 11/12] rdma: core logic, Paolo Bonzini, 2013/04/23
- Re: [Qemu-devel] [PATCH v5 11/12] rdma: core logic, Michael R. Hines, 2013/04/23
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support,
Anthony Liguori <=
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support, Eric Blake, 2013/04/23
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support, Michael R. Hines, 2013/04/23
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support, Eric Blake, 2013/04/23
Re: [Qemu-devel] [PATCH v5 00/12] rdma: migration support, Anthony Liguori, 2013/04/23
[Qemu-devel] contribution process [was: [PATCH v5 00/12] rdma: migration support], Eric Blake, 2013/04/23
Re: [Qemu-devel] contribution process [was: [PATCH v5 00/12] rdma: migration support], Michael R. Hines, 2013/04/23