Path: utzoo!attcan!uunet!mcvax!unido!sbsvax!greim
From: greim@sbsvax.UUCP (Michael Greim)
Newsgroups: comp.lang.c
Subject: Re: Storage Allocation/compaction
Summary: There was one package posted in comp.sources.unix
Keywords: malloc
Message-ID: <540@sbsvax.UUCP>
Date: 18 Jul 88 12:39:52 GMT
References: <2045@uhccux.uhcc.hawaii.edu>
Organization: Universitaet des Saarlandes, Saarbruecken, West Germany
Lines: 38

In article <2045@uhccux.uhcc.hawaii.edu>, lupton@uhccux.uhcc.hawaii.edu (Robert Lupton) writes:
< I have been using malloc/free under 4.2/4.3 BSD in an image processing
< programme that deals with 1Mby files, and otherwise makes heavy use of
< dynamic memory. I find that after a while my process grows to vast sizes
< (64 Mby or so), as the memory gets fragmented. Then malloc returns NULL,
< or the system hangs up. Obviously, using limit to increase the datasize
< would only postpone the problem.
< 
< Does anyone have a public domain storage allocator that could replace
< malloc/realloc/free that also has a call to compactify the memory? I
< don't wan't to write one, and I don't have a source licence to add a
< call to the system version. From what I remember of the 4.2 malloc, using
< realloc on freed space wouldn't help, as it doesn't compact the different
< free lists.
< 
< 		Robert Lupton
There was one posted recently in comp.sources.unix. It carried the
signature
<Bill Sebok			Princeton University, Astrophysics
<{allegra,akgua,cbosgd,decvax,ihnp4,noao,philabs,princeton,vax135}!astrovax!wls
I cannot find the message id as we've cleaned up our disks and I have removed
the Id from my local copy. 
I tested the package a little bit and as far as I can tell it is about as
fast (or slow) as the BSD malloc but it really shrinks your storage. I tried
it on SUN and a SYS3 derivant and it worked without any problem.

Hope this helps,
		Michael
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