Technologies are generally described for methods and systems effective to execute a program in a multi-core processor. In an example, methods to execute a program in a multi-core processor may include executing a first procedure on a first core of a multi-core processor. The methods may further include while executing the first procedure, sending a first and second instruction, from the first core to a second and third core, respectively. The instructions may command the cores to execute second and third procedures. The methods may further include executing the first procedure on the first core while executing the second procedure on the second core and executing the third procedure on the third core.