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Question of cell placement in P&R (SOC encounter)

bjbit

Hi,

When I try to place standard cells into the floorplan, I notice that the cells are not averagely distributed, no matter how I set the utilization percentage. Please check out the attacked picture. I even tried the utilization of 200%, and there still be some space forced to be empty. Conversely, the placed cells are heavily overlapping with each other in the rest area. I understand that a common setting of 70% utilization has no overlapping issue. But I am confusing with the exist of the empty wasted space. Is there anything I missed? Thanks.

Best regards, 

Parents

  • Thanks, Scrivner. Setting padding factor seems not spread out every cell to fill out the space. But I notice that 90% utilization gives me a fine placement with small space. I may try more on other settings.

    Best regards, 

Reply

  • Thanks, Scrivner. Setting padding factor seems not spread out every cell to fill out the space. But I notice that 90% utilization gives me a fine placement with small space. I may try more on other settings.

    Best regards, 

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