Implement functionality that will allow for the measurement of the performance impact of individual features for a given vSwitch. The scope of this work does not cover implementing support for features not currently supported in VSPERF eg. conntrack.

Sample usage:

The user specifies a topology, and a list of test parameters. Eg.:

PVP - vHost MQ, 1k flows, VxLAN tunneling, IMIX packets,2C.

This will trigger 6 (N features + 1) VSPERF test runs, result for each gathered:

1. Baseline (default PVP config)
2. + MQ (default was 1 queue)
3. + 1k flows (default was 1 flow)
4. + VxLAN tunnel
5. + IMIX packets (default was 64B)
6. + 2 cores (default was 1 core)

The above assumes that cumulative performance will be measured ie. once we enable a feature it isn't turned off for the next test run. This could be changed/specified when triggering the test run eg. cumulative=true/false

For the =false case, we enable one new feature per test run and disable all others.

Results are collated and worked on to produce a summary which reflects the impact of individual features like so:

Sample command line could be:

./vsperf --matrix topology='pvp',params='x,y,z',cumulative='true'