We can specify the number of slots in the host file. Slots can be interpreted as number of available processors on the host. If the slots are not specified, the number of slots defaults to one. 2.

In this video from the recent Argonne Training Program on Extreme-Scale Computing, Bill Gropp from the University of Illinois Urbana-Champaign presents: MPI and Hybrid Programming Models. “Blue Waters ...

During MPI_Init, all of MPI's global and internal variables are constructed. For example, a communicator is formed around all of the processes that were spawned, and unique ranks are assigned to each ...

Modern high-performance networks offer remote direct memory access (RDMA) that exposes a process’ virtual address space to other processes in the network. The Message Passing Interface (MPI) ...

Abstract: This work assesses the viability of different programming models for large-scale manycores using an MPI-like abstraction, the vendor's OpenMP, and a combination (hybrid) of both. Experiments ...

Satellite gravimetry missions have enabled the calculation of high-accuracy and high-resolution Earth gravity field models from satellite-to-satellite tracking data and gravitational gradients.

Abstract: The efficient development of parallel applications is challenging despite the availability of various tools and libraries that help specify communication and synchronization among other ...

While many application tuning guides focus on understanding the performance of an application on a single node, a very scalable application will use multiple node to achieve very high performance.