JMeter - loop controller with variable loop count

I know is very late to help you, but it can help the others.

One good way to do this is to define a counter inside the loop controller.

Example, if you want a loop with 20 iterations, you put 20 in the loop controller and in the counter you put from 0 - 19. In the counter you can also define an increment. The output variable is named in the Reference Name field.

Yes, it's possible.

Define your user variable using the User Defined Variables component, or use the CSV component.

Then, in the Loop Controller, define loop count to: ${nameOfVar}

Since version 4.0 of JMeter, there is an easier way:

• https://jmeter.apache.org/usermanual/component_reference.html#Loop_Controller

JMeter will expose the looping index as a variable named

__jm__Name of your element__idx

So for example, if your Loop Controller is named LC, then you can access the looping index through ${__jm__LC__idx}. Index starts at 0

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You can use the following inside the "Loop Count" field:

${myVar}

e.g. for a random count:

${__groovy(java.util.concurrent.ThreadLocalRandom.current().nextLong(128L),)}

You can access the current loop index (starts at 0) via ${__jm__Loop Controller__idx} where Loop Controller is the name of your loop.