iperf3 process is single-threaded. This means all the parallel streams for one test use the same CPU core. To run multiple iperf3 processes for a testing a high-speed host, do the following: Start Multiple Session on iperf3 Server Run multiple clients, using the “-T” flag to label the output:
![](https://tech.pansolusi.com/wp-content/uploads/2024/03/cropped-Cloud-2-scaled-1.jpg)