End-to-end performance of commercial applications in the face of changing hardware

Abstract

This paper investigates the changes in AIX behavior, or the lack of them, and the resulting performance impact from a generational change in servers in a typical large scale eCommerce application environment without extensive tuning of the OS and the application stack for the changing hardware.We have investigated the performance and impediments to performance at the microprocessor level and at the OS level. This paper dissects the performance data as observed from the OS and from hardware performance counters, and suggests areas for further improvements.

Spending Moore's dividend

“…The conversion entailed 268 method calls and allocation of 70 objects. Jann et al 11 analyzed this benchmark on consecutive implementations of IBM's POWER architecture, observing that "modern e-commerce applications are increasingly built out of easy-to-program, generalized but nonoptimized software components, resulting in substantive stress on the memory and storage subsystems of the computer." I conducted simple programming experiments to compare the cost of implementing the archetypical Hello World program using various languages and features.…”