Patent ID: 7809970

Claim:
A method, in a data processing system, for performing a Message Passing Interface (MPI) job, the data processing system comprising a plurality of supernodes, the plurality of supernodes comprising a plurality of processor books, and the plurality of processor books comprising a plurality of processors, the method comprising: receiving, in a first processor chip, a set of arrival signals from a set of processor chips executing tasks of the MPI job in the data processing system, the arrival signals identifying when a processor chip executes a synchronization operation for synchronizing the tasks for the MPI job; responsive to receiving the set of arrival signals from the set of processor chips, identifying, in the first processor chip, a fastest processor chip of the set of processor chips whose arrival signal arrived first; and modifying an operation of the fastest processor chip based on the identification of the fastest processor chip, wherein the set of processor chips comprises processor chips that are in one of a same processor book or a different processor book of the data processing system.