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由 Michael R. Hines 提交于
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: NJuan Quintela <quintela@redhat.com> Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com> Reviewed-by: NChegu Vinod <chegu_vinod@hp.com> Reviewed-by: NEric Blake <eblake@redhat.com> Tested-by: NChegu Vinod <chegu_vinod@hp.com> Tested-by: NMichael R. Hines <mrhines@us.ibm.com> Signed-off-by: NMichael R. Hines <mrhines@us.ibm.com> Signed-off-by: NJuan Quintela <quintela@redhat.com>
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