Use server receive rate rather than client send()/buffering rate

Fixes #412
2014-10-13 17:52:47 -07:00
parent 501eb4f916
commit e1711f357a
2 changed files with 12 additions and 4 deletions
@@ -689,7 +689,10 @@ class Mininet( object ):
        """Run iperf between two hosts.
           hosts: list of hosts; if None, uses opposite hosts
           l4Type: string, one of [ TCP, UDP ]
-           returns: results two-element array of server and client speeds"""
+           returns: results two-element array of [ server, client ] speeds
+           note: send() is buffered, so client rate can be much higher than
+           the actual transmission rate; on an unloaded system, server
+           rate should be much closer to the actual receive rate"""
        if not quietRun( 'which telnet' ):
            error( 'Cannot find telnet in $PATH - required for iperf test' )
            return