Biographical sketches of authors

Eric M. Schwarz   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (eschwarz@us.ibm.com). Dr. Schwarz received a B.S. degree in engineering science from Pennsylvania State University in 1983, an M.S. degree in electrical engineering from Ohio University in 1984, and a Ph.D. degree in electrical engineering from Stanford University in 1993. He joined IBM in 1984 in Endicott, New York, and in 1993 transferred to Poughkeepsie. He is a Senior Technical Staff Member and was the z900 microprocessor logic design leader. Dr. Schwarz provides support to IBM floating-point unit teams and is on the program committee of the IEEE Symposium on Computer Arithmetic. He is also actively researching computer architecture and heads two IBM/CMU microarchitecture work groups. Dr. Schwarz is currently working on future microarchitectures for IBM zSeries, iSeries, and pSeries processors. He is an author of 26 U.S. patents, 15 journal articles, and many conference proceedings and technical reports.

Mark A. Check   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (check@us.ibm.com). Mr. Check received a B.S.E.E. degree from the University of Wisconsin at Madison in 1988 and an M.S.C.E. degree from Syracuse University in 1993. He joined IBM in Poughkeepsie, New York, in 1988. He is a Senior Engineer and was microarchitecture and instruction unit logic leader for the z900 processor. He has received a fifth-level IBM Invention Achievement Award, two IBM Outstanding Innovation Awards, and an IBM Outstanding Technical Achievement Award. Mr. Check is currently working on the design of future IBM server processors and systems.

Chung-Lung Kevin Shum   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (cshum@us.ibm.com). Mr. Shum received a B.S. degree and an M.S. degree in electrical engineering from Columbia University in 1987 and 1988, respectively. He is one of the leading processor design engineers with the IBM Server Division in Poughkeepsie, New York. Mr. Shum joined IBM in 1988 and has had various logic and high-frequency assignments in the development of IBM zSeries central processor units, focusing mostly on I/D caches and load/store units. He is also a lead advisor on the front-end design methodology for the recent zSeries microprocessor designs. His current research interests include design methodology and high-frequency microprocessor design. Mr. Shum is the author of several patents and papers; he has received several IBM Outstanding Technical Achievement Awards.

Thomas Koehler   IBM Server Group, Boeblingen Development Laboratory, Schoenaicherstrasse 220, 71032 Boeblingen, Germany (thkoehler@de.ibm.com). Mr. Koehler received his B.S. and M.S. degrees in electrical engineering from the University of Stuttgart, Germany, in 1980 and 1984, respectively. He joined IBM in 1986 to work on memory and I/O adapter development for IBM server systems. He is currently the technical leader for the data compression and cryptographic design for the IBM zSeries processor. Mr. Koehler holds several patents; he has received two IBM Outstanding Technical Achievement Awards related to processor design and data compression.

Scott B. Swaney   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (sswaney@us.ibm.com). Mr. Swaney joined IBM in 1988 in Poughkeepsie, New York, after receiving a B.S.E.E. degree from Pennsylvania State University. He has worked on many aspects of advanced processor design, including timing verification, logic verification, and logic design, in bipolar and CMOS technologies. Mr. Swaney's work is currently focused on reliability, availability, and serviceability (RAS) in enterprise computing.

John D. MacDougall   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (jmacdo@us.ibm.com). Mr. MacDougall is a Senior Engineering Manager. He received a B.S. degree in computer engineering from Worcester Polytechnic Institute in 1990, joining the IBM S/390 division that same year to work as a logic designer of the buffer control element. He has continued his career in processor development, involved in logic design, floorplanning, and physical design. He was responsible for the definition and design of the z900 translator logic, and has since moved into the management position of the logic team. Mr. MacDougall has received IBM Outstanding Technical Achievement Awards for his work on the S/390 G5 and z900 processors.

Christopher A. Krygowski   IBM Server Group, 2455 South Road, Poughkeepsie, New York 12601 (cakryg@us.ibm.com). Mr. Krygowski received a B.S. degree in electrical engineering from Clarkson University in 1989 and an M.S. degree from the National Technological University in 1999. He joined IBM in 1989 and has had various logic design and simulation responsibilities in the development of IBM zSeries central processor units. He is currently a Senior Engineering Manager of a department responsible for the verification of future zSeries microprocessor designs. Mr. Krygowski's current research interests include floating-point arithmetic and high-frequency microprocessor design and verification. He is an author of several patents and papers and has received four IBM Outstanding Technical Achievement Awards.