Experimentally characterizing the behavior of multiprocessor memorysystems: a case study

It is demonstrated how the behavior of a cache-based multi-vector-processor memory system can be systematically characterized and its performance experimentally correlated with key features of the address stream. The approach is based on the definition of a family of parameterized kernels used to explore specific aspects of the memory system's performance. The empirical results from this kernel suite provide the data from which architectural or algorithmic characteristics can be studied. The results of applying the approach to an Alliant FX/8 are presented and evaluated     

"Religiosity and emotional disturbance": Reply.

In response to the criticism of A. Ellis (see record 1988-20829-001) on flaws in the study by P. W. Sharkey and the present author (see record 1987-22684-001) on religiosity and emotional disturbance, it is asserted that the Ss studied were clients in Ellis's counseling center; 2 parameters for future studies are suggested. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Supporting Nested OpenMP Parallelism in the TAU Performance System

Nested OpenMP parallelism allows an application to spawn teams of nested threads. This hierarchical nature of thread creation and usage poses problems for performance measurement tools that must determine thread context to properly maintain per-thread performance data. In this paper we describe the problem and a novel solution for identifying threads uniquely. Our approach has been implemented in the TAU performance system and has been successfully used in profiling and tracing OpenMP applications with nested parallelism. We also describe how extensions to the OpenMP standard can help tool developers uniquely identify threads.     

The psychological evaluation of religious professionals.

The evaluation of candidates for religious vocations is a unique endeavor in which psychologists have been engaged for more than 50 years. The task is a specific application of personnel psychology that includes screening, selection, confirmation, and guidance. After current practice is described, this article considers (a) predictive criteria for successful clergy practice, (b) the validity of current approaches, (c) parameters of the psychological report, and (d) the ways that religious institutions use psychological evaluations. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Traceview: a trace visualization tool

The design, development, and application of Traceview, a general-purpose trace-visualization tool that implements the trace-management and I/O features usually found in special-purpose trace-analysis systems, are described. The aspects of trace visualization that can be incorporated into a reusable tool are identified. The tradeoff in general-purpose design versus semantically based, detailed trace-data analysis is evaluated. Display methods and Traceview applications are discussed     

Performance measurement intrusion and perturbation analysis

The authors study the instrumentation perturbations of software event tracing on the Alliant FX/80 vector multiprocessor in sequential, vector, concurrent, and vector-concurrent modes. Based on experimental data, they derive a perturbation model that can approximate true performance from instrumented execution. They analyze the effects of instrumentation coverage, (i.e., the ratio of instrumented to executed statements), source level instrumentation, and hardware interactions. The results show that perturbations in execution times for complete trace instrumentations can exceed three orders of magnitude. With appropriate models of performance perturbation, these perturbations in execution time can be reduced to less than 20% while retaining the additional information from detailed traces. In general, it is concluded that it is possible to characterize perturbations through simple models. This permits more detailed, accurate instrumentation than traditionally believed possible