Well, I can speak from an iperf2 and WiFi perspective. The main performance things to measure are speed (latency) and throughput. Throughput units is information over time, e.g. megabytes/second. Speed or latency is units time.
Most people measure throughput and think that's enough. Network adapter cards are usually characterized by throughput as well, i.e 1Gb/s, 10Gb/s, etc. But it's really not sufficient as the only metric. Latency should also be measured. A "network power" metric can be better. It is something good (throughput) divided by something bad (slower speed.) So it's Megabits/second squared, hence the misnomer of "power." Speed is a bit tricky w/TCP but RTT gives hints at it. Note, we are prototyping some direct TCP speed measurements. Other things to consider include the resources required to get the information transferred. That's usually in memory, CPU, and energy (for battery powered devices.) Iperf only hints at memory with things like the CWND. More complex measurements deal with the shared nature of computer networks. How fair is it when multiple TCP streams compete? Then with WiFi it's more complex due to the access to the medium high costs which can be amortized via aggregation technologies. Then there are things like traffic classes, i.e. prioritize one over another in speed or throughput. There is more than this but this should get one new to performance measurements started. Bob On Mon, Jun 10, 2019 at 7:40 PM Vidura Dantanarayana <vidur...@gmail.com> wrote: > Hi everyone!! > Bonjour!! > > I'm a beginner to performance testing and I was assigned to measure TCP > performance between two aws ec2 machines. Can I know what kind of TCP > related tests can be executed with iperf3? When compared perf tool and > iperf what differences do they have in TCP performance testing. Have a nice > day!! > > BR, > Vidura Dantanarayana. > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users >
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