Vostro 1500 4gb con't

Discussion in 'Dell' started by Ron Hardin, Aug 15, 2007.

  1. Ron Hardin

    Ron Hardin Guest

    I seem to crap out in a (Cygwin) c program at getting 2gb of memory, at which point malloc()
    returns 0, meaning no more available. At the same time, the task monitor shows page file history
    going up to 4gb.

    SO far I don't understand what's happening.

    Possibilities (1) XP Home is limiting the user proc to 2gb
    (2) somehow the allocated memory has to be duplicated somewhere having something to do with
    the page file, and that's hitting a limit at 4gb, though I don't see why this doubling is
    (3) Cygwin is putting the stack pointer in the middle of the address space, so that only 2GB is
    available through malloc() and the rest is accessible only to the stack.

    I may experiment more but maybe somebody knows already.

    The system itself reports 3.75GB of ram.
    Ron Hardin, Aug 15, 2007
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  2. Ron Hardin

    wm_walsh Guest


    As far as I'm aware, all 32-bit desktop versions of Windows have a 2GB
    per process memory limit. It seems that this is true at least up to
    Windows Server 2003 in its 32-bit editions.

    I don't know about Vista or 64-bit Windows.

    wm_walsh, Aug 15, 2007
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  3. Ron Hardin

    paulmd Guest

    You might want to ask on comp.lang.c, or a c programming forum about
    overcoming that limit.
    paulmd, Aug 17, 2007
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