What is meant by P-net placement Blockage ?

[manikanta.9332]

what is meant by placemenet Blockage?
what is partial p-net placement blockage?

 

[ankurpandey310]

pnet_options( power net placement blockages) sets up placement tools to avoid power strap violations which in turn leads to congestion and IR drop issues.

Partial pnet allows standard cells to be placed under pnets,but the pins in the standard cells are checked to prevent shorts with the pnets.
Standadrd cells are placed under the metal strap ensuring there are no DRC violations.