[ConcurrentNetworkEchoTest] add optional computation per echo
This makes the test closer to our echoserver.
Those changes were lying around in my IO-notification bpf branch.
I see no reason to throw them away so here they are as a seperate MR.
This makes the test closer to our echoserver.
Those changes were lying around in my IO-notification bpf branch.
I see no reason to throw them away so here they are as a seperate MR.