mrhi...@linux.vnet.ibm.com wrote: > From: "Michael R. Hines" <mrhi...@us.ibm.com> > > This capability allows you to disable dynamic chunk registration > for better throughput on high-performance links. > > For example, using an 8GB RAM virtual machine with all 8GB of memory in > active use and the VM itself is completely idle using a 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. > > Reviewed-by: Paolo Bonzini <pbonz...@redhat.com> > Reviewed-by: Chegu Vinod <chegu_vi...@hp.com> > Reviewed-by: Eric Blake <ebl...@redhat.com> > Tested-by: Chegu Vinod <chegu_vi...@hp.com> > Tested-by: Michael R. Hines <mrhi...@us.ibm.com> > Signed-off-by: Michael R. Hines <mrhi...@us.ibm.com>
Reviewed-by: Juan Quintela <quint...@redhat.com>
