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From: mishkin@apollo.UUCP.UUCP
Newsgroups: comp.sys.apollo
Subject: Re: Memory allocation on DN3000's
Message-ID: <8706151745.AA03659@apollo.UUCP>
Date: Mon, 15-Jun-87 13:26:10 EDT
Article-I.D.: apollo.8706151745.AA03659
Posted: Mon Jun 15 13:26:10 1987
Date-Received: Wed, 17-Jun-87 02:13:21 EDT
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: world
Organization: The ARPA Internet
Lines: 31


    
    I've got a few questions which perhaps some folks out there know answers to.
    They are:
    
    	1. Using DOMAIN Pascal, if I allocate some storage with the new
    	   function, then allocate some more with
    	   RWS_$ALLOC_HEAP_POOL(RWS_$STD_POOL, <size>), do these calls
    	   allocate the storage from the same area?
    
Sort of.  Pascal allocates chunks from the standard RWS pool and then
maintains a free list of its own.

    	2. Assuming I am running a process on a DN3000 with 20 megabytes free
    	   on it's local disk, but the process I am running is allocating 40
    	   megabytes of storage, where does the process do it's paging to?
    
If you actually touched all 40 megabytes of storage, you would get a disk
full exception.  Can't manufacture something out of nothing.  There is no
reserved "swap space".

    	3. What's the size limit (if any) of the RWS_$GLOBAL_POOL?
    
It depends on the size of the virtual address space on the machine your
running.  On the 3000 there's about 7 MB of user-space accessible global
address space.  The global libraries live there too.  I took a quick look
and it seems that on my 3000 I have about 3MB left in that area.

                -- Nat Mishkin
                   Apollo Computer Inc.
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