I suggest to add this thorn to our Einstein Toolkit manifest. This will advertise it, and ensure it continues to work on all architectures.

-erik

---------- Forwarded message ---------- From: Ian Hinder ian.hinder@aei.mpg.de Date: Mon, Aug 23, 2010 at 4:18 PM Subject: [Developers] SystemStatistics thorn To: List for discussions among Cactus developers developers@cactuscode.org

Hi all, I have a thorn called SystemStatistics which collects various memory-related quantities and puts them in Cactus grid arrays.  We have been using it for a while at AEI with no problems.  The most useful thing it can tell you is the "resident set size" (i.e. the memory usage) of each process.  Cactus can then compute the minimum and maximum across processes and put it in the INFO output and store it on the disk as well.  This allows you to see at a glance how much memory is being used just by looking at stdout, taking all processes into account.  You also get an idea of the memory imbalance across processes.  It also records the swap usage, so you can see at a glance whether a run was using a lot of swap before it died or went slow. Erik has proposed that this might be included in CactusUtils, so I have committed it to AEIThorns and made it public for people to make comments and suggestions. Try it out using: svn co http://svn.aei.mpg.de/numrel/AEIThorns/SystemStatistics/trunk SystemStatistics