Throughput controller, which is used to control the execution frequency of the controller is the following elements, independent of the function of controlling the throughput. (Note: Constant Throughput Timer can be controlled with certain TPS)
Action: to control its number of child nodes performs a load distribution ratio
Throughput controller has two modes: the Total and Executions The Percent Executions.
Parameters as follows:
- Total Executions: total number of executions in the entire test program, according to the throughput values to specify the number of executions.
- Percent Executions: proportion (1% -100%), the percentage of the overall test plan execution. As a percentage of the number of executions execution frequency is calculated
- Throughput: This value can be any integer, is less than or equal to 0, the time is not executed.
- Per User: If you check the number of virtual press (threads) user to calculate the number of executions, if not checked press all virtual users to calculate the number of executions.
So how to calculate the number of executions under its throughput controller?
Add the following control cycle, adding to experiment Debug Sampler element at a certain controller:
Experiment 1: number of times the test execution mode Percent Executions
TestCase1: 3 number of threads, the thread 2 cycles, the controller cycles 2 cycles, the throughput value of 50%, check Per User
Test results: View "Aggregate Report" in the Debug Sampler number of executions, Debug Sampler = 6, that is performed six times
TestCase2: 3 number of threads, the thread 2 cycles, the controller cycles 2 cycles, the throughput value of 50%, no check Per User
The test results, see "Aggregate Report" in the Debug Sampler number of executions, Debug Sampler = 6, that is performed six times
TestCase1 and TestCase2 test results comparison table:
| Threads | Thread group cycles |
The controller cycles |
mode |
Throughput value |
Per User |
Executions |
| 3 |
2 |
2 |
Percent Executions |
50 |
Check |
6 |
| 3 |
2 |
2 |
Percent Executions |
50 |
Uncheck |
6 |
Thus, it concludes:
Per User regardless of whether the check, according to the number of executions Percent Executions are not subject to Per User mode of impact , the number of executions Percent Executions mode = thread count the number of cycles * * Throughput%.
PS: cycles = thread group cycles cycles cycles * controller.
Experiment two: the number of test execution mode by Total Executions
Also, according to a constant initial experimental conditions: 3 number of threads, the thread 2 cycles, the controller cycles 2 cycles, and then change the value of the throughput Per User check whether to do the experiment.
The results of the test in the following table:
| Threads |
Thread group cycles |
The controller cycles |
mode |
Throughput value |
Per User |
Executions |
| 3 |
2 |
2 |
Total Executions |
13 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
13 |
Uncheck |
12 |
| 3 |
2 |
2 |
Total Executions |
12 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
12 |
Uncheck |
12 |
| 3 |
2 |
2 |
Total Executions |
11 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
11 |
Uncheck |
11 |
| 3 |
2 |
2 |
Total Executions |
10 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
10 |
Uncheck |
10 |
| 3 |
2 |
2 |
Total Executions |
5 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
5 |
Uncheck |
5 |
| 3 |
2 |
2 |
Total Executions |
4 |
Check |
12 |
| 3 |
2 |
2 |
Total Executions |
4 |
Uncheck |
4 |
| 3 |
2 |
2 |
Total Executions |
3 |
Check |
9 |
| 3 |
2 |
2 |
Total Executions |
3 |
Uncheck |
3 |
| 3 |
2 |
2 |
Total Executions |
2 |
Check |
6 |
| 3 |
2 |
2 |
Total Executions |
2 |
Uncheck |
2 |
Data analysis, concluded that:
- When the check Per User:
- * Number of execution threads cycles> = the number of * certain thread, Total Executions mode = * a certain number of threads.
- When the number of threads of cycles * <* a certain number of threads, the execution times Total Executions mode when the number of threads * = number of cycles.
- When unchecked Per User:
- * Number of execution threads cycles <= a certain time, Total Executions mode cycles * = number of threads.
- When the number of threads * cycles> certain execution mode number = Total Executions throughput.