Socket performance test for krun

Just a simple server-client socket performance test, to be used in a "bug report" for libkrun.

• server.cxx: a simple echo server
• client.cxx: a simple benchmark client that connects to the server and sends packets, but will disconnect after sending a certain amount of packets and reconnect again, to simulate short-lived connections.

build

# build client on host
make client -j4
# build in a container 
podman build . -t servertest

run on host (with out TSI)

mkdir socket
podman run -it --rm -p 1111:1111 servertest 0.0.0.0:1111
# in another terminal
./client 127.0.0.1:1111
# ctrl+c to stop

Without TSI:

=== BENCHMARK RESULTS ===
Threads      : 16
Time (Total) : 0.67 s
Connections  : 1891
Conn. Rate   : 2813 conn/s
--------------------------------
Sent Pkts    : 103586
Recv Pkts    : 103586
Loss Pkts    : 0
Loss Rate    : 0.000000 %
Matched      : 103586
Success Rate : 100 %
--------------------------------
Tx QPS       : 154142
Throughput   : 75.26 MB/s
================================

run in krun (with TSI)

podman --runtime=krun run -it --rm --network=host servertest 0.0.0.0:1111
# in another terminal
./client 127.0.0.1:1111

And press ctrl+c to stop, you will get:

=== BENCHMARK RESULTS ===
Threads      : 16
Time (Total) : 5.01 s
Connections  : 16
Conn. Rate   : 3 conn/s
--------------------------------
Sent Pkts    : 1037
Recv Pkts    : 102
Loss Pkts    : 935
Loss Rate    : 90.163934 %
Matched      : 102
Success Rate : 100 %
--------------------------------
Tx QPS       : 206
Throughput   : 0.10 MB/s
================================