Stats

  • Locked Locked
  • Replies 20
  • Subscribers 126
  • Views 24511
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Transient simulation taking too much memory

vshssvs7

Sir,

I have to run a transient simulation of a transistor-level Charge Pump PLL. I have noticed that it is taking too much memory. icfb got shutdown by itself with this message at the terminal:

ERROR: Unable to allocate memory for transition file slice variable transition index level (read).

The simulation was not complete and it shutdown in between. The size of tran.tran.trn is around 40 GB.

Note that I have already done this: In Analog Design Environment, Outputs -> Save All, I have checked "selected" option in "select signals to output (save)" and Outputs -> to be saved -> select on schematic and selected few nets that I wanted to save

But even after doing the above, it is still saving every net (because I'm able to plot those nets) which is the reason for such a huge tran.tran.trn file. What more should I do to stop it from saving every net? (and only save the nets that I select) 

 

Parents

  • Sir,

    As you have seen in my netlist the last but one line is "save n1" which means it should save only net n1, but I found that after the simulation is over, I'm still able to plot other nets which I didn't want it to save. To reduce size of data I would do as you said - uncheck everything in "select device currents (currents)" line. But my question is what are the settings to be done to stop ADE from being able to plot certain nets which are not selected as "saved'. It will be able to plot only if it saves it somewhere which means it occupies data.

    The settings that I mentioned in the first post actually worked in my friend's system. It showed an error when trying to plot the nets which are NOT saved in the outputs pane. I want similar thing. I want it to be able to plot only the nets which are shown as "to be saved" in the outputs pane. I don't know why it's not working in my system even when using the same settings OR am I missing something else? 

Reply

  • Sir,

    As you have seen in my netlist the last but one line is "save n1" which means it should save only net n1, but I found that after the simulation is over, I'm still able to plot other nets which I didn't want it to save. To reduce size of data I would do as you said - uncheck everything in "select device currents (currents)" line. But my question is what are the settings to be done to stop ADE from being able to plot certain nets which are not selected as "saved'. It will be able to plot only if it saves it somewhere which means it occupies data.

    The settings that I mentioned in the first post actually worked in my friend's system. It showed an error when trying to plot the nets which are NOT saved in the outputs pane. I want similar thing. I want it to be able to plot only the nets which are shown as "to be saved" in the outputs pane. I don't know why it's not working in my system even when using the same settings OR am I missing something else? 

Children
No Data

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.