View source for CSIT/VPP-ubuntu-compare-1404to1604

Summary of performance trending from FD.io testbeds after upgrading from Ubuntu14.04 Trusty to 16.04 Xenial:-

* '''A. Comparison based on:'''
** 1. Ubuntu 14.04 - vpp build 101, csit-vpp-perf-master-long #1076
** 2. Ubuntu 16.04 - vpp build 136, csit-vpp-perf-master-long #1080(onwards)
** 3. Source data log files for above calcs available here: [https://wiki.fd.io/view/CSIT/long1076vs1080-ubuntu1404vs1604-analysis analysis], [https://wiki.fd.io/view/CSIT/long1076vs1080-ubuntu1404vs1604-thput-incr thput-increase], [https://wiki.fd.io/view/CSIT/long1076vs1080-ubuntu1404vs1604-thput-decr thput-decrease].

* '''B. Increased - all values for NIC2NIC, vpp 1worker unless noted:'''
** 1. l2bd x520 6%
** 2. IPv4 x520 3%
** 3. L2XC x520 3..9% (untagged, dot1q, dot1ad)
** 4. L2XC xl710 3%
** 5. L2XC xl710 81% 2workers

* '''C. Decreased - all values for NIC2NIC, vpp 1worker:'''
** 1. IPv6 x520 -5%

* '''D. This is also reflected in NDR trending graphs generated by LF Jenkins jobs:'''
** 1. Ubuntu1404, vpp1609 release without fib2.0 patches:
*** https://jenkins.fd.io/view/csit/job/csit-vpp-perf-1609-long/plot/RFC2544%3ANDR/
** 2. Ubuntu1604, vpp master with fib2.0 patches:
*** https://jenkins.fd.io/view/csit/job/csit-vpp-perf-master-long/plot/RFC2544%3ANDR/
** 3. due to LF purged job history we only have vpp-1609 ("fib1.0") vs. vpp-master (fib2.0) trend graphs.

* '''E. Note that you can now see daily performance trending graphs for NDR and PDR for vpp master here:'''
** 1. vpp master branch - RFC2544:NDR trending plot
*** https://jenkins.fd.io/view/csit/job/csit-vpp-verify-perf-master-nightly-all/plot/RFC2544%3ANDR/
** 2. vpp master branch - RFC2544:PDR trending plot
*** https://jenkins.fd.io/view/csit/job/csit-vpp-verify-perf-master-nightly-all/plot/RFC2544%3APDR/

* '''F. Few requests:'''
** 1. Welcome any volunteers to help us catch any anomalies in perf trending.
** 2. Pls send any suggestions and wishes for what you would like to see for performance tests and trending - csit-dev@lists.fd.io.