[demo] also put pv into global namespace for debugging
[demo] also put pv into global namespace for debugging

biasmv/pv,Traksewt/pv,biasmv/pv,CyrusBiotechnology/pv,biasmv/pv,yuhangwang/pv,CyrusBiotechnology/pv,Traksewt/pv,Traksewt/pv,yuhangwang/pv,CyrusBiotechnology/pv,Traksewt/pv,CyrusBiotechnology/pv,yuhangwang/pv,biasmv/pv,yuhangwang/pv