Re: Non contiguous Virtual Memory

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From: pawan (pawan_at_discussions.microsoft.com)
Date: 12/02/04 

Date: Wed, 1 Dec 2004 22:19:03 -0800

Actually a number of process's are going to attach to this memory and share
the information (do some modifications or just access the data). The
Question is how the process which wants to attach to this memory will come to
know which part of the section to map in its memory? As tracking the
information of every bit data is very tedious job. And also it will impact
the performance as each time the process wants some information exists in
shared memory it need to attach, get the information and again detach from
the shared memory.
I also tried with the /3GB switch, but it did not help me , as some of the
ssytem dll's are getting loaded just under the 2GB boundry. Even though the
2GB to 3GB virtual memory is free, Still it can not satisfy my request (1.5
GB).
If there is a way by which I can hint the system dlls about the free 2GB to
3GB memory range so that those dll's can get loaded in that part of memory .
I can get the free virtual space which I am looking for.

"Ivan Brugiolo [MSFT]" wrote:

> Why cannot you create a section backed by the paging file
> and map small views of the section in your address space ?
>
> --
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>
> "pawan1604" <pawan1604@discussions.microsoft.com> wrote in message
> news:DF276ED7-69EF-430F-9063-0F68C97F806E@microsoft.com...
> > Hi,
> > I am working on a project. where I want to create the file Mapping of 1.5
> > GB. But due to badly fragmented process virtual memory (many system dll's
> and
> > third party dll's are getting loaded at random address in the process
> virtual
> > memory), I am not able to do so, as in Windows shared memory can only be
> > created contiguously (if i am not wrong).
> > Can any body help me, how I can create a 1.5 GB file mapping in this case?
> >
> > thanks,
> > pawan.
>
>
>

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