irun (ncsim) without waveform

Hi,

There must be a system task in your verilog source code that is causing the database to be created.  Look for a $shm_ tasks in tb_top.sv and either comment them out or surround them with conditional compiler directives.

Best regards,

Mickey

 there is no shm task or other task in my code to do that.  maybe in ovm_test, ovm_env  ... but I didn't find anything :(

OVM has automatic transaction recording that will generate transaction waveforms. Search for "enable_recording", "begin_tr", or "end_tr" to see if your code is calling any of those routines.

Tim

 Í've removed all enable_recording, begin_tr and end_tr tasks .. and waves.shm (trn, dsn) is still created.

2 minutes later :   I have in my ovm_test::build - set_config_int( "*", "recording_detail", OVM_FULL);  

I've changed OVM_FULL with OVM_NONE and no waves.shm was created.

Thanks !

Hello,

Thanks for your patience as we try to narrow where in the code the instruction for dumping waveforms is located.

I noticed that you are using a -incdir to include various files out of the directory named my_dir.  Can you grep for "shm_" in all of the files of that directory (unix>  grep shm_  my_dir/*). 

as another option try doing a decompile of the snapshot as follows:

1)  find the name of the snapshot (ncls -snapshot)

2)  decompile the snapshot (ncdc -origfiles <snapshot name>)

3)  cd into the created ncdc directory and grep for shm_ in all of the files that were created.

if the above doesn't work, let me know, I have some other ideas that may help.

Best regards,

Mickey

another option to find the problem code is to temporarily rename the shared object that resolves the shm_ tasks.  Be aware that you will affect other users ability to create a waveform dump while you make this change.  Consequently I would do the following after having exhausted all other attempts to find the code with the tasks.

1)  cd into <IUS_install>/tools/lib

2)  rename the file named libdwapi.so to libdwapi.so.bak

3)  cd back to your run directory and rerun the simulation.

when the shm_ tasks are encountered you will get messages similar to the following, indicating the line and file where the task is found:

Warning!  $shm_open - unable to open database file (check installation)
            File: ./mux_test_random.sv, line = 16, pos = 10
           Scope: mux_test
            Time: 0 FS + 0

4)  After discovering where the tasks exist in the code be sure to go back to the installation directory and mv libdwapi.so.bak back to libdwapi.so

Hope that helps.

Mickey

My Bad...  I didn't completely read your last post until now.  it's good that you have found the source of the database creation.

Mickey

True,OVM has automatic transaction recording that will generate transaction waveforms. Search for "enable_recording", "begin_tr", or "end_tr" to see if your code .
Tim