[SOLVED] seed promotion/ push devices ?

[MohEllayali]

hi guys
cans somebody give an intuitive explanation of these two mecanism used by calibre LVS , i am a little confused about it
thanks in advance

 

[erikl]

For highly parallel structures, the LVS tool uses random trials in order to try and complete the job; seed numbers are related to these trials. Calibre LVS has an option to create a seed promotion report. After small design changes, it is wise to re-run the LVS with the last successful seed number.

AFAIR, the option push devices allows the LVS to interchange parallel devices even if they are not adjacent/neighbouring in layout. This should save runtime.