step1:
compile fastdds with -DFASTDDS_STATISTICS=ON（default is on）and -DPERFORMANCE_TESTS=ON
step2:
./LatencyTest publisher -f payloads_demands.csv --domain 0 -s 1000000
./LatencyTest subscriber -f payloads_demands.csv --domain 0
step3:
configure fastddsmonitor to introspect FASTDDS LATENCY like picture1, but the graph is always empty.