In scalable multiprocessor architectures, the times required for a processor to access various
portions of memory are different. In this paper, we consider how this characteristic affects
performance by comparing it to the ideal but unrealizable case in which the access times to
all memory modules can be kept constant, even as the number of processors is increased.
We examine several application kernels to investigate how well they would execute on
various instances of NUMA systems with a hierarchical memory structure. The results of our …