send_results
{
        "cpu_util_total":       0.913964,
        "cpu_util_user":        0.326904,
        "cpu_util_system":      0.587059,
        "sender_has_retransmits":       0,
        "streams":      [{
                        "id":   1,
                        "bytes":        9471200256,
                        "retransmits":  -1,
                        "jitter":       0,
                        "errors":       0,
                        "packets":      0
                }]
}
get_results
{
        "cpu_util_total":       2.20962,
        "cpu_util_user":        0.85617,
        "cpu_util_system":      1.35345,
        "sender_has_retransmits":       -1,
        "streams":      [{
                        "id":   1,
                        "bytes":        9471178084,
                        "retransmits":  -1,
                        "jitter":       0,
                        "errors":       0,
                        "packets":      0
                }]
}
[  4] 2499.00-2500.00 sec  3.63 MBytes  30.4 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-2500.00 sec  8.82 GBytes  30.3 Mbits/sec                  sender
[  4]   0.00-2500.00 sec  8.82 GBytes  30.3 Mbits/sec                  receiver

iperf Done.