Wait states in parallel applications can be identified by scanning event traces for characteristic patterns. In our earlier work we defined such inefficiency patterns for MPI-2 one-sided communication, although still based on a serial traceanalysis scheme with limited scalability. In this article we show how wait states in one-sided communications can be detected in a more scalable fashion by t...

Automatic performance analysis of parallel programs can be accomplished by scanning event traces of program execution for patterns representing inefficient behavior. The temporal and spatial relationships between individual runtime events recorded in the event trace allow the recognition of wait states as a result of suboptimal parallel interaction. In our earlier work [1], we have shown how pa...

BACKGROUND The proportion of patients who undergo surgery within a clinically safe time is an important performance indicator in health systems that use wait lists to manage access to care. However, little is known about chances of on-time surgery according to variations in existing demand. We sought to determine what proportion of patients have had late coronary bypass surgery after registrati...