= Summary =

iperf3 is a tool for measuring achievable bandwidth on IP networks.

iperf3 is NOT backwards compatible with the original iperf.

Supported platforms:
  * Linux
  * FreeBSD 
  * Mac OSX

= Building iperf3 =

== Prerequisites: ==
  * libuuid: this is not installed by default for Debian/Ubuntu Systems
             to install: apt-get install uuid-dev

== Building ==

./configure; make; make install


== Latest version ==

To check out the most recent code, do:  hg clone http://code.google.com/p/iperf/


== Bug Reports ==

Before submitting a bug report, try checking out the latest version of the code, and confirm that its not
already fixed. Then submit to: https://code.google.com/p/iperf/issues/list

For more information see: http://code.google.com/p/iperf/

== Changes from iperf 2.x ==

New options:
  -V, --verbose             more detailed output than before
  -J, --json                output in JSON format
  -Z, --zerocopy            use a 'zero copy' sendfile() method of sending data
  -O, --omit N              omit the first n seconds (to ignore slowstart)
  -T, --title str           prefix every output line with this string
  -F, --file name           xmit/recv the specified file
  -A, --affinity n/n,m      set CPU affinity

Depricated options:

Plan to add for the next release:
  -D, --daemon             run the server as a daemon

Not planning to support. If you really miss these options, please submit a request in the issue tracker
  -d, --dualtest           Do a bidirectional test simultaneously
  -r, --tradeoff           Do a bidirectional test individually
  -N, --nodelay            set TCP no delay, disabling Nagle's Algorithm
  -T, --ttl                time-to-live, for multicast (default 1)
  -Z, --linux-congestion <algo>  set TCP congestion control algorithm (Linux only)
  -x, --reportexclude [CDMSV]   exclude C(connection) D(data) M(multicast) S(settings) V(server) reports
  -y, --reportstyle C      report as a Comma-Separated Values

Also deprecated is the ability to set the options via environment variables.

For sample command line usage, see: 
	http://fasterdata.es.net/performance-testing/network-troubleshooting-tools/iperf-and-iperf3/


Using the default options, iperf is meant to show typical well designed application performance.
'Typical well designed application' means avoiding artificial enhancements that work only for testing
(such as splice()'ing the data to /dev/null).  iperf does also have flags for 'extreme best case'
optimizations but they must be explicitly activated.

These flags include:
  -Z, --zerocopy            use a 'zero copy' sendfile() method of sending data
  -A, --affinity n/n,m      set CPU affinity