Fisher holds a BA in mathematics from New York University and obtained a Master's and PhD degree in Computer Science from The Courant Institute of Mathematics of New York University. Fisher joined the Yale University Department of Computer Science in 1979 as an assistant professor, and was promoted to associate professor in 1983. In 1984 Fisher left Yale to found Multiflow Computer with Yale colleagues John O'Donnell and John Ruttenberg. Fisher joined HP Labs upon the closing of Multiflow in 1990. He directed HP Labs in Cambridge, MA USA from its founding in 1994, and became an HP Fellow and then Senior Fellow upon the inception of those titles at Hewlett-Packard. Fisher retired from HP Labs in 2006. Fisher is married to Elizabeth Fisher; they have a son, David Fisher, and a daughter, Dora Fisher. He holds Spanish citizenship due to his Sephardic heritage.
In his Ph.D. dissertation, Fisher created the Trace Scheduling compiler algorithm and coined the term Instruction-level parallelism to characterize VLIW, superscalar, dataflow and other architecture styles that involve fine-grained parallelism among simple machine-level instructions. Trace scheduling was the first practical algorithm to find large amounts of parallelism between instructions that occupied different basic blocks. This greatly increased the potential speed-up for instruction-level parallel architectures.
The VLIW architecture style
Because of the difficulty of applying trace scheduling to idiosyncratic systems that in theory should have been suitable targets for a trace scheduling compiler, Fisher put forward the VLIW architectural style. VLIWs are normal computers, designed to run compiled code and used like ordinary computers, but offering large amounts of instruction-level parallelism scheduled by a trace scheduling or similar compiler. VLIWs are now used extensively, especially in embedded systems. The most popular VLIW cores have sold in quantities of several billion processors.
Multiflow Computer
Multiflow was founded to commercialize trace scheduling and VLIW architectures, then widely thought to be impractical. Multiflow's technical success and the dissemination of its technology and people had a great effect on the future of computer science and the computer industry.
Awards and honors
1984 NSF Presidential Young Investigator's Award.
1987 Eli Whitney Connecticut Entrepreneur of the Year.
2003 Eckert-Mauchly Award given by The IEEE Computer Society and The Association for Computing Machinery, in recognition of 25 years of seminal contributions to instruction-level parallelism, pioneering work on VLIW architectures, and the formulation of the Trace Scheduling compilation technique. The Eckert-Mauchly is known as the computer architecture community’s highest award.
2012 B. Ramakrishna Rau Award given by The IEEE Computer Society for the development of trace scheduling compilation and pioneering work in VLIW architectures.
Writings
Joseph A Fisher, Paolo Farabochi and Cliff Young: Elsevier/Morgan Kaufmann, 2004.
Joseph A Fisher: IEEE Trans. Computers, 30:478-490, 1981.
Joseph A. Fisher: ISCA '83 Proceedings of the 10th annual international symposium on Computer architecture, Pages 140-150, ACM, New York, NY, USA. Retrospective, 25 Years of ISCA, ACM, 1998.
Joseph A. Fisher, John R. Ellis, John C. Ruttenberg, Alexandru Nicolau: Symp. Compiler Construction, 1984: 37-47. Retrospective, Best of PLDI, ACM SIGPLAN Notices, 39:112, 2003.
