I have built a graph to estimate global motion between consecutive video frames, and try measuring its performance using
vx_perf_t perf; vxQueryGraph(graph, VX_GRAPH_ATTRIBUTE_PERFORMANCE, &perf, sizeof(perf)));
Processing the graph on Jetson Tx2 kit for thousands time with FullHD frames and computing histogram of execution times, I was quite surprised that graph performance fluctuate in a too wide range (from under 10ms to above 60ms (figure) ).
Why there is this difference?
Thanks in advance