Files in this item



application/pdfμComplexity Estimating Processor Design Effort.pdf (263kB)
(no description provided)PDF


Title:μComplexity: Estimating Processor Design Effort
Author(s):Bazeghi, Cyrus; Mesa-Martinez, Fracisco J.; Greskamp, Brian; Torrellas, Josep; Renau, Jose
Subject(s):microprocessor design
computer science
Abstract:Microprocessor design complexity is growing rapidly. As a result, current development costs for top of the line processors are staggering, and are doubling every 4 years. As we design ever larger and more complex processors, it is becoming increasingly difficult to estimate how much time it will take to design and verify them. To compound this problem, processor design cost estimation still does not have a quantitative approach. Although designing a processor is very resource consuming, there is little work measuring, understanding, and estimating the effort required. To address this problem, this paper introduces uComplexity, a methodology to measure and estimate processor design effort. uComplexity consists of three main parts, namely a procedure to account for the contributions of the different components in the design, accurate statistical regression of experimental measures using a nonlinear mixed-effects model, and a productivity adjustment to account for the productivities of different teams. We use uComplexity to evaluate a series of design effort estimators on several processor designs. Our analysis shows that the number of lines of HDL code, the sum of the fan-ins of the logic cones in the design, and a linear combination of the two metrics are good design effort estimators. On the other hand, power, area, frequency, number of flip-flops, and number of standard cells are poor estimators of design effort. We also show that productivity adjustments are necessary to produce accurate estimations.
Issue Date:2004-08
Genre:Technical Report
Other Identifier(s):UIUCDCS-R-2005-2644
Rights Information:You are granted permission for the non-commercial reproduction, distribution, display, and performance of this technical report in any format, BUT this permission is only for a period of 45 (forty-five) days from the most recent time that you verified that this technical report is still available from the University of Illinois at Urbana-Champaign Computer Science Department under terms that include this permission. All other rights are reserved by the author(s).
Date Available in IDEALS:2009-04-20

This item appears in the following Collection(s)

Item Statistics