Presentation
Routing Congestion Mitigation Techniques Targeting Dense Designs
DescriptionChallenging high performance design schedules with competitive PPA targets may lead to congested or unrouteable designs during EDA backend process. To address these challenges, we propose multiple novel routing congestion mitigation methods including: (1) finer integration of estimated global routing congestion based cell spreading method into optimization flows to mitigate congestion (2) incremental routing based cell movement transformation to further mitigate congestion, (3) temporary removal of polarity inverters to eliminate their influence on cell placement & reduce congestion. Proposed enhancements showed up to 3% congestion reduction on high performance industrial designs leading to their expedited adoption by our design teams. They turned several initially unrouteable dense designs routable, and our optimization steps have gone from typically increasing congestion to decreasing congestion!
Event Type
Engineering Presentation
TimeTuesday, June 242:00pm - 2:15pm PDT
Location2012, Level 2
AI
Back-End Design