UPGRADE YOUR BROWSER

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!

AR# 16225

6.3i/6.2i/6.1i XST- XST takes a long time to synthesize

Description

Keywords: XST, synthesis, long, run time, ISE

XST takes longer than usual to synthesize a number of my designs.

Solution

Issues associated with the creation of the RTL Viewer netlist (".ngr") cause XST to take a long time to synthesize. Turning off the RTL Viewer netlist creation can speed up synthesis run times.

To turn off RTL Viewer netlist creation from within ISE:

1. Right-click the "Synthesize" process.
2. Select "Properties".
3. Change the "Generate RTL Schematic" setting from "Yes" to "No".

This issue has been fixed in ISE 7.1i
AR# 16225
Date Created 09/03/2007
Last Updated 01/06/2009
Status Archive
Type General Article