This paper discusses the design and implementation of an interface that allows a debugger to obtain the information necessary to display the contents of the MPI message queues. The design has been implemented in the TotalView debugger, and dynamic libraries that conform to the interface exist for MPICH, as well as the proprietary MPI implementations from Compaq, IBM, and SGI.

An instantaneously trained artificial neural network schema is used to improve the interactive speed in very large scale scientific visualization. An instant learning algorithm is adopted to reduce the training time for user behavior analysis in billion-particle walkthrough on an SGI Onyx2 graphics server connected to a PC cluster.

We have developed a detailed chemical scheme for the degradation of the short-lived source gases bromoform (CHBr3) and dibromomethane (CH2Br2) and implemented it in the TOMCAT/SLIMCAT three-dimensional (3D) chemical transport model (CTM). The CTM has been used to predict the distribution of the two source gases (SGs) and 11 of their organic product gases (PGs). These first global calculations o...

FLY is a parallel treecode which makes heavy use of the one-sided communication paradigm to handle the management of the tree structure. In its public version the code implements the equations for cosmological evolution, and can be run for different cosmological models. This reference guide describes the actual implementation of the algorithms of the public version of FLY, and suggests how to m...

For lighting simulations in architecture there is the need for correct illumination calculation of virtual scenes. The Radiance Synthetic Imaging System delivers an excellent solution to that problem. Unfortunately, simulating complex scenes leads to long computation times even for one frame. This paper proposes a parallelization strategy which is suited for scenes with medium to high complexit...

The Graphics Environment for Max, or GEM, is a real-time computer graphics language which operates under the SGI version of Max. GEM supports abstract computer graphics as well as image and pixel manipulations, enabling the user to control the graphics as objects, instead of as a sequence of vertices. Because it maintains the Max paradigm, GEM is an easy to use development environment.

In this paper we present a parallel algorithm for solving the inverse eigenvalue problem for real symmetric Toeplitz matrices. The algorithm is implemented using the parallel library ScaLAPACK, based on the communication model MPI. Experimental results are reported on a SGI Power Challenge and on a cluster of PC's connected by a Myrinet network. The results show that the algorithm is portable a...

This paper explains how the Cray MTA-2 might be a good platform on which to run an existing suite of finite element codes. We discuss the issues involved and compare the performance on the MTA with that on an SGI Origin 3800.