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Job management software on peta- and exascale supercomputers continues to provide static resource allocations, from a program’s start until its end. Dynamic resource allocation and management is a research direction that has the potential to improve the ...

As we approach exascale and start planning for beyond, the rising complexity of systems and applications demands new monitoring, analysis, and optimization approaches. This requires close coordination with the parallel programming system used, which for ...

Understanding the behavior of parallel applications that use the Message Passing Interface (MPI) is critical for optimizing communication performance. Performance tools for MPI currently rely on the PMPI Profiling Interface or the MPI Tools Information ...

MPI includes all processes in MPI_COMM_WORLD; this is untenable for reasons of scale, resiliency, and overhead. This paper offers a new approach, extending MPI with a new concept called Sessions, which makes two key contributions: a tighter integration ...

C tool writers are forced to deal with a number of Fortran and C interoperability issues when intercepting MPI routines and completing them with PMPI. The C based tool has to intercept the Fortran MPI routines and marshal arguments between C and Fortran,...

Runtime error detection tools detect many classes of MPI usage errors, including errors in collective communication calls. However, they often face scalability challenges. We present runtime checks for MPI collective operations that use a Tree-Based ...