We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

Page Bookmarked

AR# 18368

6.1i Virtex-II PAR - Placer crash in phase 2.2 during 2nd cost table of MPPR run


Keywords: MPPR, 2nd, second, cost, pass, crash, fails

Urgency: Hot

General Description:
Cases have been seen where PAR crashes during the 2nd pass of an MPPR run during placer phase 2.2. The source of this failure has been identified as a software bug, and a fix has been scheduled.


This problem will be fixed in 6.1i Service Pack 3 which is currently scheduled
for December 11, 2003.

Meanwhile a work-around is to create a command line script that runs multiple single pass PAR jobs using different cost tables, for example, "-t 5" will run cost table 5.

The phase involved has to do with calculating the placement of clock domains. If the clock domains are already area constrained, or if the number and placement of BUFGMUXs involved is such that there is no chance of a primary/secondary clock conflict, then it is possible to bypass the failing placer phase by setting the environment variable XIL_PAR_SKIPAUTOCLOCKPLACEMENT.
AR# 18368
Date 10/23/2008
Status Archive
Type General Article