MPI accomplishes portable, standardized message-passing between processes by exposing a standard API that hides the implementation of the underlying mechanism for message passing. Until now, checkpointing an MPI program required knowledge of these underlying mechanisms. Through the addition of a proxy, we demonstrate that MPI programs can be checkpointed and restarted regardless of the MPI impl...

We present a simple library which equips MPI implementations with truly asynchronous non-blocking point-to-point operations, and which is independent of the underlying communication infrastructure. It utilizes the MPI profiling interface (PMPI) and the MPI_THREAD_MULTIPLE thread compatibility level, and works with current versions of Intel MPI, Open MPI, MPICH2, MVAPICH2, Cray MPI, and IBM MPI....

A new software package BC-MPI which allows an MPI application to run on several clusters with various MPI implementations is presented. It uses vendor MPI implementations for communication inside clusters and exploits the multithreaded MPI THREAD MULTIPLE mode for handling inter-cluster communication in additional threads of the MPI application. Furthermore, a BC-MPI application can be automati...

INTRODUCTION Balancing reliability and resource limitations as well as recruitment activities during admission interviews is a challenge for many medical schools. The Modified Personal Interview (MPI) has been shown to have good psychometric properties while being resource efficient for specialized admission interviews. We describe implementation of an MPI adaptation integrating psychometric ri...

The goal of this study was to evaluate the preejection time (PEP)-derived myocardial performance index (MPI) in hypertensive (HT) patients with sinus rhythm and its relationship to the classic Tei index. One hundred five patients were enrolled in the study (65 HT and 40 control subjects). The mean age of all patients was 50.5 ± 15 years and 60% were female. Echocardiography was performed on all...

The Message Passing Interface (MPI) has become a standard for message passing parallel applications. This report first introduces the underlying paradigm, message passing, and explores some of the challenges explicit message passing poses for developing parallel programs. We then take a closer look at the MPI standardization effort, its goals, and its results to see what features the current ve...

Open MPI was initially designed to support a wide variety of high-performance networks and network programming interfaces. Recently, Open MPI was enhanced to support networks that have full support for MPI matching semantics. Previous Open MPI efforts focused on networks that require the MPI library to manage message matching, which is sub-optimal for some networks that inherently support match...

DEVICE INTERFACE ABSTRACT DEVICE INTERFACE Figure 14 Digital MPI Architecture Table 5 MPI Latency Comparison MPI Implementation Transport Platform Latency MPICH 1.0.10 Sockets FDDI DEC 3000/800 350 ms MPICH 1.0.10 Shared Memory AlphaServer 2100 4/233 30 ms Digital MPI V1.0 MEMORY CHANNEL 1.0 AlphaServer 2100 4/233 16 ms Digital MPI V1.0 MEMORY CHANNEL 1.5 AlphaServer 4100 5/300 6.9 ms Digital M...

OBJECTIVE The diagnostic yield of combined cardiopulmonary exercise testing (CPET) and myocardial perfusion imaging (MPI) in patients referred for stress testing has received limited study. METHODS We evaluated consecutive patients who underwent combined CPET-MPI at a single tertiary referral center between 2011 and 2015. An abnormal CPET was defined as any of the following: reduced oxygen co...