I want to test my web app's Performance on both Apache Tomcat and Oracle Weblogic via any common tool to compare the results. But I don't know which tool can work on both these technologies. I know JMeter is for Apache and Oracle's Enterprise Manager for Weblogic. But the trouble is using a common tool for both. Thank you in advance!!
Nothing to stop you using JMeter on an application that runs on Weblogic middleware.
You could also look at LoadRunner, LoadUI (etc). Some Testing Tools The tricky part will be working out where any bottlenecks are, that is if you find any problems.