I have OS Process Sampler to invoke OS command via JMeter. I need to measure total time of script execution and define response assertion. Asseriont should fail if measured execution duration exceeds given limit.
How can I do this using JMeter? I can't see any possibility to measure execution duration.
Add a "Duration Assertion" as a child of your sampler.
https://jmeter.apache.org/usermanual/component_reference.html#Duration_Assertion