Using Chip Master Planning in Automatic ASIC Design Flow to Improve Performance and Buffer Resource Management

Subject Areas : Journal of Computer & Robotics

Ali Jahanian ¹ , Morteza Saheb Zamani ²

1 - Department of Electrical and Computer Engineering, Shahid Beheshti University, G. C., Tehran, Iran
2 - IT and Computer Engineering Department, Amirkabir University of Technology, Tehran, Iran

Received: 2009-10-11 Accepted : 2010-03-13 Published : 2012-06-12

Keywords: Routability, Planning, Placement,

Abstract :

Modern integrated circuits consist of millions of standard cells and routing paths. In nano-scale designs, mis-prediction is a dominant problem that may diminish the quality of physical design algorithms or even result in the disruption of the convergence of the design cycle. In this paper, a new planning methodology is presented in which a master-plan of the chip is constructed at the early levels of the physical design, preparing for the operation of the subsequent physical design stages. As a proof of concept study, the proposed planning design flow is applied to both wire planning and buffer resource planning, and the outcomes are compared against conventional contributions. Experimental results reveal considerable improvements in terms of performance, timing yield and buffer usage.

References:

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Table 4
Experimental results for the conventional buffer insertion flow and BMPBI flow Circuit WSR Conventional buffer insertion flow BMP-based buffer insertion flow (BMPBI) PDP Reduction CPU Time Overhead #buffs Delay (ps) PDP Avg. PDP CPU time (sec) #buffs Delay (ps) PDP Avg. PDP CPU time (sec) des_area 15% 27 1598 23298.84 17716.3 5.1 14 1587 11997.72 15232.92 5.3 1.4% 3% 10% 19 1578 16190.28 13 1602 11246.04 3% 16 1581 13659.84 26 1600 22464 systemaes 15% 10 2203 11896.2 13060.7 10.7 9 2230 10837.8 10597.32 11.1 2.3% 3% 10% 14 2193 16579.08 9 2203 10706.58 3% 9 2203 10706.58 9 2203 10706.58 tv80 15% 39 2364 49764.8 46312.1 11 22 2366 28108 42096.4 11.4 9.1% 3% 10% 41 2355 52135.7 24 2365 37035.9 3% 29 2365 37035.9 48 2359 61145.3 ac97_ctrl 15% 11 823 4888.6 3780.8 14 7 834 3152.5 3477.5 14.5 8.02% 3% 10% 6 825 2673 9 819 3980 3% 7 FAILED - 4 825 3300 dma 15% 133 2667 191543.9 192498.9 26.3 127 2706 185577.4 166114.66 27 13.7% 5.7% 10% 138 2596 193454 99 2712 144983.5 3% 263 FAILED - 119 2611 167782.8 aes_core 15% 18 1400 25200 31711.3 20.3 19 1390 26410 20496.66 21.7 35% 5.5% 10% 19 1390 26410 22 1340 29480 3% 31 1404 43524 4 1400 5600 Average 11.58% 3.86%
Journal of Computer & Robotics 1 (2010) 125-135
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