Is there a (optimally free) tool to measure One-Way-Delay?
The use case is checking whether network traffic delayed by f.ex.
tc is flowing as it should.
At the minimum, the application should be called with the IP address of one host, and report back the delays in each direction. It is totally acceptable to start a server on the destination host.
It should run on (at least virtualized) Linux. It would help if it were free.
Note: ping and traceroute are no valid answers, they do not measure one-way-delay.