A fast incremental clock skew scheduling algorithm for slack optimization

Abstract

We propose a fast clock skew scheduling algorithm which minimizes clock period and enlarges the slacks of timing critical paths. To reduce the runtime of the timing analysis engine, our algorithm allows the sequential graph to be partly extracted. And the runtime of itself is almost linear to the size of the extracted sequential graph. Experimental results show its runtime is less than a minute for a design with more than ten thousands of flip-flops.