tree c2950daf75fb578af4f840bb13f13bba7ff03f37
parent 97dfde41a471b6faeb363383127a183502c9e4a7
author Ievgeniia Zadorozhna <izadorozhna@mirantis.com> 1658843783 +0300
committer Oleksandr Savatieiev <osavatieiev@mirantis.com> 1660227983 +0000

Switched multi-threads testing from iperf3 to iperf

Switched multi-threads testing from iperf3 to iperf because the
iperf3 was not designed for the multiple threads, see [1] and [2].
So, iperf (v2) will be used for measuring tests with -P option.

Made the number of threads as an configurable option (10 by default).

* installing iperf package
* allowing 5001 port
* starting iperf as well as iperf3 at VMs
* added 'multiple_threads_number' option (10 by default)
* added details which tool was used (iperf3 or iperf) in the final table
* changed the default image from Ubuntu18 to Ubuntu20

[1] https: //fasterdata.es.net/performance-testing/network-troubleshooting-tools/iperf/multi-stream-iperf3/
[2] https: //github.com/esnet/iperf/issues/289

Related-PROD: PROD-36943
Change-Id: I39d2c44723344c87836bf7b5fa02b546a08f2ca5