Thanks alot @jerryzh168 , but sorry I am quite dumb to figure it out myself  ,
Can you suggest me where to pass it in the following code:
effb3_model=learner_effb3.model.eval()

backend = "qnnpack"

effb3_model.qconfig = torch.quantization.get_default_qconfig(backend)
torch.backends.quantized.engine = backend
model_static_quantized = torch.quantization.prepare(effb3_model, inplace=False)
model_static_quantized = torch.quantization.convert(model_static_quantized, inplace=False)
print_size_of_model(model_static_quantized)


Thanks alot…