Ibm ~ Pseries and Rs/6000 Linux Overview for Customers

Ibm ~ Pseries Linux on Pseries Overview

Ab Initio Quantum Chemistry on the IBM pSeries 690

In this study, we compare the performance of the POWER3 processor and the new IBM eServer pSeries 690. The pSeries 690 can scale up to 32-way POWER4 processor at 1.3 GHz and 1.1 GHz. To perform this comparison we used the Gaussian98 Revision A.11 series of electronic structure programs. It is an integrated system to model molecular systems under a variety of conditions, carrying out its calcula...

Performance and Experience with LAPI - a New High-Performance Communication Library for the IBM RS/6000 SP

LAPI is a low-level, high-performance communication interface available on the IBM RS/6000 SP system. It provides an activemessage-like interface along with remote memory copy and synchronization functionality. It is designed primarily for use by experienced programmers in developing parallel subsystems, libraries and tools, but we also expect power programmers to use it in end-user application...

GPFS: A Shared-Disk File System for Large Computing Clusters

GPFS is IBM’s parallel, shared-disk file system for cluster computers, available on the RS/6000 SP parallel supercomputer and on Linux clusters. GPFS is used on many of the largest supercomputers in the world. GPFS was built on many of the ideas that were developed in the academic community over the last several years, particularly distributed locking and recovery technology. To date it has bee...

Leading-Zero Anticipator (LZA) in the IBM RISC System/6000 Floating-Point Execution Unit

This paper presents a novel technique used in the multiply-add-fused (MAF) unit of the IBM RlSC System/6000* (RS/6000) processor for normalizing the floating-point results. Unlike the conventional procedures applied thus far, the so-called leading-zero anticipator (LZA) of the RS/SOOO carries out processing of the leading zeros and ones in parallel with floating-point addition. Therefore, the n...