The recent trend of increasing numbers of cores per chip has resulted in vast amounts of on-
node parallelism. These high core counts result in hardware variability that introduces …

Abstract The Message Passing Interface (MPI) is the dominant programming system for
scientific applications that run on distributed memory parallel computers. MPI is a library …

One of the critical factors that affect the performance of many applications is load imbalance.
Applications are increasingly becoming sophisticated and are using irregular structures and …

Application scalability can be significantly impacted by node level performance variability in
HPC. While previous studies have demonstrated the impact of one source of variability, OS …

Application performance can degrade significantly due to node-local load imbalances
during application execution on a large number of SMP nodes. These imbalances can arise …

As high-performance computing systems continue to evolve on the way to exascale, the
performance heterogeneity of components in the system is increasing. This heterogeneity …