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Cisco CSR 1000V Series Cloud Services Router Software Configuration Guide
OL-27477-07
Chapter 6 Installing the Cisco CSR 1000V in KVM Environments
Increasing Performance on KVM Configurations
Note When configuring CPU pinning, carefully consider the CPU topology of the host server. If using
a Cisco CSR 1000V configured with multiple cores, do not configure CPU pinning across
multiple sockets.
• Enabling the vhost-net Driver
To improve performance in KVM environments, Cisco recommends that you enable the LINUX
vhost-net driver. Make sure the vhost-net driver is loaded by entering the following command on the
KVM host:
modprobe vhost-net
For more information, see the KVM documentation.
Note The vhost-net setting is enabled by default on KVM Ubuntu installations. If using Red Hat
Enterprise Linux, you must specify which devices will use the XML definition file.