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CESG Seminar: Impact of Local Interconnects on Timing and Power in a High Performance Microprocessor

October 22, 2013 @ 3:55 pm - 5:00 pm

Room 1034 ETB

Rupesh Shelar
LSI Logic

In nanometer technologies, local interconnects are believed to cause major impact on timing and power in VLSI circuits. Just how large is the impact? This talk answers the question with results from a study carried out to assess the same in a quantitative manner on a real high performance design. The study shows that for RTL-to-layout synthesized (RLS) blocks, in a 45 nm technology microprocessor core, local interconnects contribute nearly 1/3rd each to the timing on the worst internal paths and to the dynamic power dissipation. This points to severity of the impact due to the local interconnects, which is likely to worsen with technology scaling. It also implies that algorithms/approaches underlying existing synthesis/physical design tools/methodologies have had limited success in mitigating the same.

Bio: Rupesh S. Shelar received PhD in Electrical Engineering from the University of Minnesota, Minneapolis in 2004. He was with Intel, USA from 2004 till 2012, where he contributed to Core i7 and Atom microprocessor designs in 45, 32, 22, and 14 nm technologies in the areas of clock distribution and interconnect impact analysis. He is a senior member of IEEE and a co-author of a book titled “Routing Congestion in VLSI Circuits: Estimation and Optimization” published by Springer in 2007. Currently, he is a principal engineer at LSI, India, responsible for physical design for System on Chips (SoCs).

Host: Dr. Hu


October 22, 2013
3:55 pm - 5:00 pm