David Bar-On

Using the `--forceflush` option allows to use "tee" and see the output in real time. E.g, on the server side: `iperf3 -s --forceflush | tee logfile.out`.

It may be that core 0 (per the `-A 0` setting) is loaded, and there are other cores that are free. Did you try running the server on other cores?...