How to search lock query in innodb with pt-stalk

Hi!
I need help,
Please tell me how to configure pt-stalk to search lock query in innodb ( for example more than 5 seconds ) with pt-stalk
Thanks.


OS Red Hat Enterprise Linux Server release 5.6 (Tikanga) , Percona-Server-server-55-5.5.28, percona-toolkit-2.1.8-1