Klaus-Dieter Schubert

Learn More
Today directed random simulation is one of the most commonly used verification techniques. Because this technique in no proof of correctness, it is important to test the design as complete as possible. But this is a hard to reach goal, that needs a lot of computing power and much human interaction. There had been a proposal for using Bayesian Networks to(More)
The post-silicon validation phase in a processor's design life cycle is geared towards finding all remaining bugs in the system. It is, in fact, our last opportunity to find functional and electrical bugs in the design before shipping it to customers. In this paper, we provide a high-level overview of the methodology and technologies put into use as part(More)
The development of large servers is facing multiple challenges. The system combines a mix of design styles from custom VLSI chips to ASIC and SoC designs. The integration of hardware and firmware accumulates further challenges to the functional simulation effort. By adding more and more specialized verification solutions additional constraints are generated(More)
Hardware/software (HW/SW) co-verification can considerably shorten the time required for system integration and bring-up. But coverification is limited by the simulation speed achievable whenever hardware models are required to verify hardware and software interactions. Although the use of a generalpurpose hardware accelerator as an extremely fast simulator(More)
A high-end eServer consists of multiple microprocessor chips packaged with additional chips on a multichip module. In conjunction with memory and various I/O cards, this module is mounted on a card called a processor book, and a few of those cards on a board finally represent a major part of the system. Before the first hardware is built, simulations must(More)
System integration of an IBM eServer z990 begins when a z990 book, which houses the main processors, memory, and I/O adapters, is installed in a z990 frame, Licensed Internal Code is “booted” in the service element (SE), and power is turned on. This initial system “bringup,” also referred to as post-silicon integration, is composed of three major steps:(More)