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#554 UDT: weak performance within kvm-based virtual machine

v1.0_(example)
open
nobody
UDT (1)
1
2014-08-13
2013-03-25
Gier
No

After migrating a standalone windows udt-application from physical to virtual, the virtual machine only delivers about 10% bandwidth in comparison to the physical machine. The TCP-bandwidth of the VM is equal to the physical machine. The VM lives within a 11-node KVM-cluster, based on ubuntu 12.04. Two operating systems (Windows7 and Windows2003) perform in the same way. Both VMs use the actual Red Hat virtio-win-0.1-52 driver.
Any idea, where to start debugging (UDT,KVM,Virt-IO)?

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