You can run multiple thread groups in two different ways :
1. Run them consecutively i.e. One by One : To run multiple thread groups consecutively, you need to select checkbox on Test Plan page. Refer below screenshot :
2. Run them in Parallel : To run multiple thread groups in parallel, you need to un-select the checkbox on Test Plan page as mentioned in above screenshot.
Download sample script from here : https://www.dropbox.com/sh/c0utecr4t87ez7v/2m4OIULEkV
1. Run them consecutively i.e. One by One : To run multiple thread groups consecutively, you need to select checkbox on Test Plan page. Refer below screenshot :
2. Run them in Parallel : To run multiple thread groups in parallel, you need to un-select the checkbox on Test Plan page as mentioned in above screenshot.
Download sample script from here : https://www.dropbox.com/sh/c0utecr4t87ez7v/2m4OIULEkV