10G NIC performance: VFIO vs virtio: Difference between revisions
From KVM
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OS: RHEL 7.1 | OS: RHEL 7.1 | ||
== Result summary == | |||
*In native environment, iperf can get 9.4 Gbps throughput. Since iperf is a SW packet generator and normal process shall it be, this a reasonable number. | |||
*With VFIO passthrough, network performance is also 9.4 Gbps; i.e., we cannot observe overhead in virtualization environment with VFIO passthrough method, in context of typical SW network user application. | |||
*With virtio approach, if proper configured (details see below), network performance can also achieve 9.4 Gbps. | |||
Here is the details about each kind of configuration. | |||
Revision as of 04:44, 11 May 2015
We did some experiment trying to measure network performance overhead in virtualization environment, comparing between VFIO passthrough and virtio approaches.
Test Topology
2 Intel Grantley-EP platforms (Xeon E5-2697 v3) connected by 10G link; memory 96 G.
NIC: Intel 82599ES
Test Tool: iperf
OS: RHEL 7.1
Result summary
- In native environment, iperf can get 9.4 Gbps throughput. Since iperf is a SW packet generator and normal process shall it be, this a reasonable number.
- With VFIO passthrough, network performance is also 9.4 Gbps; i.e., we cannot observe overhead in virtualization environment with VFIO passthrough method, in context of typical SW network user application.
- With virtio approach, if proper configured (details see below), network performance can also achieve 9.4 Gbps.
Here is the details about each kind of configuration.