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Message-Id: <6.2.1.2.0.20050427161247.088d15a8@pop.prospeed.net>
Date: Wed, 27 Apr 2005 16:16:18 -0400
To: Mark Hadfield <m DOT hadfield AT niwa DOT co DOT nz>, cygwin AT cygwin DOT com
From: Larry Hall <lh-no-personal-replies-please AT cygwin DOT com>
Subject: Re: G77 160 MB memory allocation limit
In-Reply-To: <d4oq5o$l02$1@sea.gmane.org>
References: <45C1A052D4EE624FA64275E179096BAA26E806 AT ALRMMX01 DOT rm DOT aleniaspazio DOT it> <SERRANOC82OXv73aN5A0000014c AT SERRANO DOT CAM DOT ARTIMI DOT COM> <d4oq5o$l02$1 AT sea DOT gmane DOT org>
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At 03:51 PM 4/27/2005, you wrote:
>Dave Korn wrote:
>>>From: Impagnatiello Fabrizio
>>>Sent: 27 April 2005 16:20
>>>Starting from 1.5.13 (14 and 15 subversions are the same) I experienced
>>>all FOTRAN written programs using large arrays to crash. 
>>>No error message, just exit.
>>>
>>>After investigation (WEB/mailing list) and testing programs I discovered
>>>and verified that a new near 160 MByte allocation limit is induced by
>>>cygwin1.dll  
>>>
>>>Simple programs compiled with -mno-cygwin flag may allocate up to 1920
>>>MByte. 
>>>With the old 1.5.12 the usable size (2BG RAM machine) was 1536 MByte.
>>>
>>>Why ???
>>  Nobody knows.  Something changed.  Perhaps in cygwin.  Then again, have
>>you also installed XP SP2 in the period since 1.5.12?  That caused massive
>>disturbances to process memory map space because M$ rebased all the dlls in
>>the whole world.
>
>I don't think XP SP2 is relevant, as I have this problem on Windows 2000.
>
>It's interesting to have this pinned down to the transition from 1.5.12 to 1.5.13. I have half a mind (but only half) to try and verify this.

Can anybody spare Mark half a mind so he get up to a full one? ;-)


--
Larry Hall                              http://www.rfk.com
RFK Partners, Inc.                      (508) 893-9779 - RFK Office
838 Washington Street                   (508) 893-9889 - FAX
Holliston, MA 01746                     


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