An Inspector/Executor Based Strategy to Efficiently Parallelize N-Body Simulation Programs on Shared Memory Systems

Reordering of data is becoming more and more significant in order to achieve a higher performance in memory data access and, particularly, in program runtime. This fact be-comes specially important in parallel applications that are executed in shared memory systems. This work presents a new parallelizing, run time strategy for irregular structures asso-ciated to N-Body problem simulation algorithms. Such stra-tegy, so-called STPCLS (Step Classification), is based on the inspector-executor paradigm. It has been tested in a shared memory system using a significant set of irregular loops. The outcomes show that the efficiency of our solution is high, and the benefits overcome the overheads imposed by our algo-rithm. 1