Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Cadence - memory report problem

Status
Not open for further replies.

t4_v

Full Member level 2
Full Member level 2
Joined
Jun 6, 2015
Messages
122
Helped
27
Reputation
54
Reaction score
28
Trophy points
28
Activity points
813
Hi,

I'm running a simulation using Cadence software. I'm using ADE L with AMS simulator. During simulation I get following notifications in CDS.log file:

\# Available memory: 25,735 MB at UTC 2015.11.09 21:23:30.124
\# Memory report: Maximum memory size now 26,215 MB at UTC 2015.11.09 21:23:30.124
\# Memory report: Maximum memory size now 26,842 MB at UTC 2015.11.09 21:24:20.126
\# Memory report: Maximum memory size now 27,424 MB at UTC 2015.11.09 21:25:20.129
\# Memory report: Maximum memory size now 27,986 MB at UTC 2015.11.09 21:26:40.135
\# Available memory: 28,260 MB at UTC 2015.11.09 21:29:10.151
\# Memory report: Maximum memory size now 28,740 MB at UTC 2015.11.09 21:29:10.151
\# Memory report: Maximum memory size now 27,848 MB at UTC 2015.11.09 21:34:50.113
\# Memory report: Maximum memory size now 28,524 MB at UTC 2015.11.09 21:36:20.118
\# Memory report: Maximum memory size now 29,189 MB at UTC 2015.11.09 21:37:10.121
\# Memory report: Maximum memory size now 30,035 MB at UTC 2015.11.09 21:37:30.122
\# Memory report: Maximum memory size now 30,921 MB at UTC 2015.11.09 21:40:00.136
\# Available memory: 30,917 MB at UTC 2015.11.09 21:41:20.143
\# Memory report: Maximum memory size now 31,595 MB at UTC 2015.11.09 21:41:30.144

and the farm computer where I run the simulation is restarted, thus I cannot finish my simulation.

I looked into Cadence Help, Google and searched Cadence manuals, but what I found is only a chapter titled "Tips for Reducing Memory Usage (memory)" in "Virtuoso Spectre Circuit Simulator Reference" (page 422 for document from 2014.10). There are four tips, from which only one:
"2. Try ulimit/unlimit command to adjust memory limitations."

might be useful for me. However, I'm not able to find how to use ulimit or unlimit commands.


My questions are:
1. Does "Available memory / Memory report: Maximum memory size now ..." refer to my RAM?
2. How to solve this problem?
3. How to use ulimit/unlimit commands?
 

I think it is ROM. You may need to clean your simulation folder and save only necessary node/current when simulating.
 

Your report tells of memory sizes of 25 GB and more. That's sizable. Each line changes by a gigabyte.

You might learn more by opening the Task Manager (press Ctrl-Alt-delete, assuming you have Windows). Look through your list of applications and processes. See if anything appears out of place. Watch for a runaway process that does things that are suspect (example, consumes increasing memory).

the farm computer where I run the simulation is restarted

To get more information than Task Manager gives you, download Sysinternals Process Explorer. (Freeware utility. Locate by a search at www.microsoft.com ).

Sysinternals will tell you whether those 25 GB blocks are virtual memory, or what.

You may see something happen that triggers a restart.

I am not familiar with Cadence so I don't know if it could do anything to cause a restart.
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top