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2007
IEEE

The impact of loop unrolling on controller delay in high level synthesis

10 years 2 months ago
The impact of loop unrolling on controller delay in high level synthesis
Loop unrolling is a well-known compiler optimization that can lead to significant performance improvements. When used in High Level Synthesis (HLS) unrolling can affect the controller complexity and delay. We study the effect of the loop unrolling factor on the delay of controllers generated during HLS. We propose a technique to predict controller delay as a function of the loop unrolling factor, and use this prediction with other search space pruning methods to automatically determine the optimal loop unrolling factor that results in a controller whose delay fits into a specified time budget, without an exhaustive exploration. Experimental results indicate delay predictions that are close to measured delays, yet significantly faster than exhaustive synthesis.
Srikanth Kurra, Neeraj Kumar Singh, Preeti Ranjan
Added 02 Jun 2010
Updated 02 Jun 2010
Type Conference
Year 2007
Where DATE
Authors Srikanth Kurra, Neeraj Kumar Singh, Preeti Ranjan Panda
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