AnatoliChe

The same problem: ` # iperf3 -s and the same host: # iperf3 -c 127.0.0.1 --bidir Connecting to host 127.0.0.1, port 5201 [ 5] local 127.0.0.1 port 37206 connected to...

iperf3 -v iperf 3.9 (cJSON 1.7.13) Linux host 5.10.0-14-amd64 #1 SMP Debian 5.10.113-1 (2022-04-29) x86_64 Optional features available: CPU affinity setting, IPv6 flow label, SCTP, TCP congestion algorithm setting, sendfile...

Sure! By the way we can see it and with iperf3 3.12 take new server Dell R350, Intel(R) Xeon(R) E-2388G CPU @ 3.20GHz free total used free shared buff/cache available...

With -P2 I have random results first: ` /tmp/iperf/src# ./iperf3 -c 127.0.0.1 -P2 --bidir [ ID][Role] Interval Transfer Bitrate Retr [ 5][TX-C] 0.00-10.00 sec 25.3 GBytes 21.7 Gbits/sec 0 sender...

if you take a look at htop, you can notice server takes 100% of CPU, client only 80%. So RX by client can do more work and can generate more...

cpu 0 0[|||||||||||||||||||||||||||||||||||||||||||100.0%] cpu 5 5[|||||||||||||||||||||||||||||||||||||||| 78.9%] in the previous message

` ./iperf3 -s -A 1,2 iperf3: parameter error - some option you are trying to set is client only ` iperf3 -s -A 1 ./iperf3 -c 127.0.0.1 --bidir -A2 -t...