I just did a quick test, hosts connected over QDR fabric.
If you give the switches -c -C to netperf, You can see the CPU usage of the hosts as well.
user@host01 ]# netperf -H 10.10.100.21 -l 10 -t TCP_STREAM -c -C -- -m 65536
I got a thruput of 12.9 Gbits/s using 5,5% CPU
Testing with iperf, gave me up to 20Gb/s on the same hosts.
Regards, Ingvar