Relative debugging traces software errors by comparing two executions of a program concurrently - one code being a reference version and the other faulty. Relative debugging is particularly effective when code is migrated from one platform to another, ...

Traditional debuggers are of limited value for modern scientific codes that manipulate large complex data structures. This paper discusses a novel debug-time assertion, called a "Statistical Assertion", that allows a user to reason about large data ...

Programming languages have advanced tremendously over the years, but program debuggers have hardly changed. Sequential debuggers do little more than allow a user to control the flow of a program and examine its state. Parallel ones support the same ...

Debugging parallel programs is an order of magnitude more complex than sequential ones, and yet, most parallel debuggers provide little extra functionality than their sequential counterparts. This problem becomes more serious as computational codes ...

Application developers are facing new and more complicated performance tuning and optimization problems as architectures become more complex. In order to achieve reasonable performance on these systems, HPC users need help from performance analysis ...

Co-array fortran is a parallel programming language for scientific applications that provides a very intuitive mechanism for communication, and especially, one-sided communication. Despite the benefits of this integration of communication primitives with ...