First you need to install Jmeter Plugin.
Install Jmeter plugin.
http://jmeter-plugins.org/downloads/all/
For the client-side plug-in, you need to put the decompressed file in the Jmeter directory and restart Jmeter.
http://jmeter-plugins.org/downloads/file/JMeterPlugins-Standard-1.1.3.zip (http://jmeter-plugins.org/wiki/PerfMon/)
Upload the agent to the server and start the agent program.
http://jmeter-plugins.org/downloads/file/ServerAgent-2.2.1.zip (http://jmeter-plugins.org/wiki/PerfMonAgent/)
Add Perfmon Metrics Collector to Jmeter's TestPlan. Configure the metrics to be viewed and set the format.
Add Aggregate Report
Then start Jmeter's TestPlan, you can view the client's data and server-side CPU/Memory and so on.