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AR# 1980

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

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

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
AR# 1980
Date Created 08/31/2007
Last Updated 03/22/2000
Status Archive
Type ??????