* Chuan Zheng (zhengchuan@huawei.com) wrote:
> v3 -> v4:
> still use MigrationState field and save hostname in migration_tls_channel_connect
> remove MigrationState from MultiFDSendParams
>
> v2 -> v3:
> rebase patches on master
>
> v1 -> v2:
> fix memoryleak of MigrationState hostname
> add tls_hostname into MultiFDSendParams for handshake use
> fix function alignment
> squash Patch005 and Patch006
> add ioc into trace-events
>
> TLS migration could easily reach bottleneck of cpu because of encryption
> and decryption in migration thread.
> In our test, the tls migration could only reach 300MB/s under bandwidth
> of 500MB/s.
>
> Inspired by multifd, we add multifd support for tls migration to make fully
> use of given net bandwidth at the cost of multi-cpus and could reduce
> at most of 100% migration time with 4U16G test vm.
>
> Evaluate migration time of migration vm.
> The VM specifications for migration are as follows:
> - VM use 4-K page;
> - the number of VCPU is 4;
> - the total memory is 16Gigabit;
> - use 'mempress' tool to pressurize VM(mempress 4096 100);
> - migration flag is 73755 (8219 + 65536 (TLS)) vs 204827 (8219 + 65536 (TLS) + 131072(Multifd))
>
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> | | TLS | MultiFD + TLS (2 channel) |
> --------------------------------------------------------t---------------------------
> | mempress 1024 120 | 25.035s | 15.067s |
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> | mempress 1024 200 | 48.798s | 25.334s |
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Queued.
> Chuan Zheng (6):
> migration/tls: save hostname into MigrationState
> migration/tls: extract migration_tls_client_create for common-use
> migration/tls: add tls_hostname into MultiFDSendParams
> migration/tls: extract cleanup function for common-use
> migration/tls: add support for multifd tls-handshake
> migration/tls: add trace points for multifd-tls
>
> migration/channel.c | 1 +
> migration/migration.c | 1 +
> migration/migration.h | 5 ++
> migration/multifd.c | 124 +++++++++++++++++++++++++++++++++++++++++++------
> migration/multifd.h | 2 +
> migration/tls.c | 28 +++++++----
> migration/tls.h | 6 +++
> migration/trace-events | 4 ++
> 8 files changed, 149 insertions(+), 22 deletions(-)
>
> --
> 1.8.3.1
>
>
--
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK