From: "Amidon, William H." <wamidon@middlebury.edu>
To: "cygwin@cygwin.com" <cygwin@cygwin.com>
CC: "Amidon, William H." <wamidon@middlebury.edu>
Subject: enabling /largeaddressaware for cygwin in windows 7 64-bit
Date: Thu, 4 Aug 2011 15:19:17 +0000
Message-ID: <8C8430B888BACD4E91AC1CBE7000204F1D74558C@FISHERCAT.middlebury.edu>
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Hello,

I am not a programming expert, and i wonder if you could give me some basic advice.

I am running cygwin on a 64-bit Dell XPS, running Windows 7, with a Core i5 processor, and 12 GB of RAM installed.

The fortran 90 code I am running keeps running out of memory (virtual memory or stack overflow errors) on jobs that the computer should easily handle.  I have increased the paging memory to 36 MB, but I am afraid that CygWin is still being limited to ~ 1 GB of memory.

My problem is very similar to what is described here:
http://cygwin.com/ml/cygwin/2011-01/msg00196.html

I followed the instructions at [1] and [2] to increase the heap chunk available to cygwin, but I have also read that adding a /largeaddressaware link might further increase the amount of memory available to cygwin (see [3], which confused me a lot).  I have not been able to find clear instructions about how to do this for cygwin, could you help?

Also, I am interested in any tips about how to maximize the amount of memory available to cygwin given my 64-bit windows 7 setup!  Thanks very much for your kind help to a very helpless geologist!

Will Amidon


[1]  http://www.cygwin.com/cygwin-ug-net/setup-maxmem.html
[2] http://cygwin.com/ml/cygwin/2010-04/msg00983.html
[3] http://www.cygwin.com/ml/cygwin-developers/2011-06/msg00002.html


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