rocm-systems/samples/1_Utils/hipCommander/perf/latency_nullstream.hcm

setstream(0);
NullKernel; streamsync;
loop(100000); NullKernel; streamsync; endloop(1);

loop(100000); H2D;  NullKernel; streamsync; endloop(1);

loop(100000); H2D;  NullKernel; D2H;  streamsync; endloop(1);