Here is the command working . I’ve replaced all the below values as per my pubsub VPN configuration and able to publish message to topic which has Queue endpoint subscribed to this topic.
sdkperf_java.bat -cip=tcps://ipaddress:portnumber, -cu=Username@VPNName -cpf= -sslts= -ssltsp= -ssltsf=jks -sslp=TLSv1.2 -stl= -ptl=Topicname –mn=1 -msa=10 –md
Thanks
Shiva