Degree of Parallelism variations effects on GPUs reliability

Results of an extensive neutron radiation test to evaluate the Degree of Parallelism effects on GPUs reliability are presented. Experimental data demonstrate that a higher Degree of Parallelism increases the device performances but may have the countermeasure of making the GPU less reliable to radiation. Architectural analyses highlight that the observed phenomena is due to the increased scheduling strain required to implement the parallelism. Finally, the cache distribution forced by different Degrees Of Parallelism is also proved to influence the application error rate.