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From: anon@anon.org (anon)
Subject: Re: Size of Vector limited to 1024 MB of Heap Size
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References: <g3qc68$5a5$1@aioe.org>
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Date: Tue, 24 Jun 2008 22:53:02 GMT
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Date: 2008-06-24T22:53:02+00:00
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Adjust your heap size in the linking phase. 

In <g3qc68$5a5$1@aioe.org>, Dennis Hoppe <dennis.hoppe@hoppinet.de> writes:
>Hi,
>
>my machine has 4 GB of RAM and I am wondering, why I can't use
>at least 2 or 3 GBytes to run an Ada program. It seems, that my
>Ada Compiler (Gnat 4.4.0) limit the memory to 2 GB per default.
>Is it possible to allocate more than 2 GB?
>
>Here is a simple example of an "evil" vector, that gains
>more memory in each pass. The program terminates exactly at
>1024 MB of used Heap memory.
>
>
>with Ada.Containers.Vectors;
>
>procedure Heap is
>   package Generic_Vector is new Ada.Containers.Vectors
>     (Element_Type => Integer, Index_Type => Natural);
>		
>   Evil_Vector : Generic_Vector.Vector;
>begin -- Heap
>   loop
>     Generic_Vector.Append (Evil_Vector, Integer'Last);
>   end loop;
>end Heap;
>
>
>heap(6374) malloc: *** mmap(size=2147487744) failed (error code=12)
>*** error: can't allocate region
>*** set a breakpoint in malloc_error_break to debug
>
>raised STORAGE_ERROR : heap exhausted
>
>
>I could not find a suitable Compiler switch or a parameter, that
>can be set for the operating system (linux). "ulimit -v" is already
>set to unlimited.
>
>"gnatmem" reports, that my water mark with 1024 MB is reached, but
>the final water mark is, needless to say, higher.
>
>
>Best regards,
>   Dennis Hoppe