CFD Online Logo CFD Online URL
Home > Forums > Hardware

Memory storage problem IBM-machine, xlf compiler

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   April 21, 2011, 08:16
Wink Memory storage problem IBM-machine, xlf compiler
New Member
Join Date: Aug 2009
Posts: 4
Rep Power: 10
abelme is on a distinguished road
Hello everyone,

I have a memory allocation problem with my CFD code. I am running for the first time on IBM machines, with xlf fortran compiler, and I get a memory saturation problem, after a few iterations.

More precisely , after a certain number of time stepts, my job stops because the memory is full and cannot allocate my next variable anymore.

I talked with peoples and tried to understand, The code I am using was developped a few years ago, and we have situations like;

if (.not. allocated(x)) allocate(x(k))

with no deallocation when x is no longer used.

Could this problem came from the fact that we store in memory quite a lot?
Peoples from the clusters administration told me that I probably have an allocation into a loop. I really spent time on searching fro this variable and couldn't find it!

Anyone has a suggestion or maybe somebody uncountred a similar problem??

Thx in advance,
abelme is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Gridgen export problem with memory allocation? july Pointwise & Gridgen 5 July 21, 2008 20:29
RAM memory problem alpha Main CFD Forum 8 February 12, 2008 12:07
Memory allocation problem shhe CFX 4 January 7, 2004 00:00
memory problem in solver rao CFX 4 October 15, 2003 14:58
PC vs. Workstation Tim Franke Main CFD Forum 5 September 29, 1999 15:01

All times are GMT -4. The time now is 23:32.