The RDMA bandwidth is not fully utilized for over 25Gigabit NIC because
of single channel for RDMA migration. This patch series is going to support
multifd for RDMA migration based on multifd framework.
Comparsion is between origion and multifd RDMA migration is re-tested for v3.
The VM specifications for migration are as follows:
- VM use 4k page;
- the number of VCPU is 4;
- the total memory is 16Gigabit;
- use 'mempress' tool to pressurize VM(mempress 8000 500);
- use 25Gigabit network card to migrate;
For origin RDMA and MultiRDMA migration, the total migration times of
VM are as follows:
+++++++++++++++++++++++++++++++++++++++++++++++++
| | NOT rdma-pin-all | rdma-pin-all |
+++++++++++++++++++++++++++++++++++++++++++++++++
| origin RDMA | 26 s | 29 s |
-------------------------------------------------
| MultiRDMA | 16 s | 17 s |
+++++++++++++++++++++++++++++++++++++++++++++++++
Test the multifd RDMA migration like this:
virsh migrate --live --parallel --migrateuri
rdma://192.168.1.100 [VM] --listen-address 0.0.0.0 qemu+tcp://192.168.1.100/system --verbose
v3 -> v4:
modify some function names
export multifd_rdma_ops instead of a function
fix minior codestyle issues
v2 -> v3:
create multifd ops for both tcp and rdma
do not export rdma to avoid multifd code in mess
fix build issue for non-rdma
fix some codestyle and buggy code
Chuan Zheng (18):
migration/rdma: add the 'migrate_rdma_pin_all' function
migration/rdma: judge whether or not the RDMA is used for migration
migration/rdma: create multifd_setup_ops for Tx/Rx thread
migration/rdma: add multifd_setup_ops for rdma
migration/rdma: do not need sync main for rdma
migration/rdma: export MultiFDSendParams/MultiFDRecvParams
migration/rdma: add rdma field into multifd send/recv param
migration/rdma: export getQIOChannel to get QIOchannel in rdma
migration/rdma: add multifd_rdma_load_setup() to setup multifd rdma
migration/rdma: Create the multifd recv channels for RDMA
migration/rdma: record host_port for multifd RDMA
migration/rdma: Create the multifd send channels for RDMA
migration/rdma: Add the function for dynamic page registration
migration/rdma: register memory for multifd RDMA channels
migration/rdma: only register the memory for multifd channels
migration/rdma: add rdma_channel into Migrationstate field
migration/rdma: send data for both rdma-pin-all and NOT rdma-pin-all
mode
migration/rdma: RDMA cleanup for multifd migration
migration/migration.c | 24 +++
migration/migration.h | 11 ++
migration/multifd.c | 97 +++++++++-
migration/multifd.h | 25 +++
migration/qemu-file.c | 5 +
migration/qemu-file.h | 1 +
migration/rdma.c | 490 +++++++++++++++++++++++++++++++++++++++++++++++++-
7 files changed, 641 insertions(+), 12 deletions(-)
--
1.8.3.1