[USRP-users] Vivado 2017.4 testbench hangs at update_compile_order

[EJ Kreinar via USRP-users]

Hi All,

I'm seeing some odd behavior after upgrading uhd-fpga to Vivado 2017.4. It
appears some of my larger testbenches take a noticeably longer time to
complete the "update_compile_order" command before progressing.

Here's an example (see elapsed time of 10+ minutes, after the
update_compile_order tcl command with the -verbose option):

```
# set_property top $sim_top [get_filesets $sim_fileset]
# set_property default_lib xil_defaultlib [current_project]
# update_compile_order -fileset sim_1 -verbose
update_compile_order: *Time (s): cpu = 00:09:30 ; elapsed = 00:10:24 *.
Memory (MB): peak = 1218.863 ; gain = 20.000 ; free physical = 21745 ; free
virtual = 28625
# set_property target_simulator $simulator [current_project]
# if [expr [string equal $simulator "XSim"] == 1] {
#     set_property verilog_define "WORKING_DIR=\"$working_dir\""
[get_filesets $sim_fileset]
# } else {
#     set_property verilog_define "WORKING_DIR=$working_dir" [get_filesets
$sim_fileset]
# }
[...etc...]
```

The same OOT module testbench running Vivado 2015.4 and uhd-fpga
commit 434943b takes 18 seconds:

```
# set_property top $sim_top [get_filesets $sim_fileset]
# set_property default_lib xil_defaultlib [current_project]
# update_compile_order -fileset sim_1 -verbose
update_compile_order: *Time (s): cpu = 00:00:18 ; elapsed = 00:00:18 *.
Memory (MB): peak = 979.520 ; gain = 42.805 ; free physical = 12432 ; free
virtual = 26832
# set_property target_simulator $simulator [current_project]
# if [expr [string equal $simulator "XSim"] == 1] {
#     set_property verilog_define "WORKING_DIR=\"$working_dir\""
[get_filesets $sim_fileset]
# } else {
#     set_property verilog_define "WORKING_DIR=$working_dir" [get_filesets
$sim_fileset]
# }
[...etc...]
```

I havent tested or debugged exhaustively yet, but it will definitely become
a point of friction for simulations to take 10+ minutes to load. Has anyone
else seen this behavior? Is it a regression in Vivado? Thoughts appreciated.

Thanks!
EJ

_______________________________________________
USRP-users mailing list
USRP-users@lists.ettus.com
http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com