Answers Database

PPR 5.2.x: Relaxing PPR timespecs in xactinit.dat


Record #1980

Problem Title:
PPR 5.2.x: Relaxing PPR timespecs in xactinit.dat


Problem Description:
If even a few nets do not meet timespec,  PPR under default settings will relax
timespecs on all nets to a maximum value.
This can be avoided by making the following additions to the xactinit.dat file.


Solution 1:

Minimal additions:
	placer_4k_pa_goal_ratio = 1.0
	pa_init_goal = 1.00

Other common additions to xactinit.dat:

	 placer_4k_pa_goal_ratio = 1.0
	 pa_init_goal = 1.00
	 loop_report_max = L
	 /ppr/report_paths = true
	 pa_pins_to_show  = 6
	 pa_paths_to_show = 5
	 /ppr/placer_effort = 4
	 /ppr/router_effort = 4
	 /ppr/path_timing = true
	 /ppr/timing = forced_on
	 /*/*/plog_file_level	= verbose
	 /*/plog_file_level	= verbose
	 /*/*/plog_stdout_level = verbose
	 /*/plog_stdout_level	= verbose



End of Record #1980