@weiwei_lee
Yes, please take a look at all of our docs – I think they mostly seem that they will answer your questions. Here is the doc on quantization 127. You gather a profile on the floating point graph with whatever inputs you want, it dumps the yaml file, then you load it back in and it will quantize the graph given the profile you gathered. Assuming the CPU backend supports the node in quantized form, all inputs will be int8. Otherwise conversions to/from int8 will be performed. You can look at the graph that is generated to see what is and is not quantized, via the command line option -dump-graph-DAG="graph.dot".