Garbage collection

David Gould <>
Thu Sep 2 19:58:23 CEST 1999


On Thu, Sep 02, 1999 at 07:20:41AM -0700, David Brown wrote:
> >>>>> On Thu, 2 Sep 1999 11:22:52 +0200 (CEST), Klacke <> said:
> 
> > David Gould writes:
> >> I might be interested in working on this. I am curious to know what has
> >> prevented this in the past, 
> 
> > It's a bit hard, to make the gc non blocking ggc.c needs to rewritten
> > into a reentrant collector. This is a bit hard and it also makes
> > the collector a bit slower unless some real clever tricks are 
> > applied.
> 
> > ...
> 
> I found a bunch of good papers on garbage collection (realtime as
> well) on <ftp://ftp.cs.utexas.edu/pub/garbage/>.  One of the papers

This is Paul Wilsons group at U Texas, a great resource for memory management
information. I have read a number of their papers but not specifically the
realtime GC one. But I will.

> discusses a real-time garbage collector that only needs to coordinate
> with the "mutators" when the mutate memory.  We have a nice advantage
> here that there isn't much mutation going on outside of making new
> objects.
> 
> Their collector is single threaded, and single heaped.  Moving to this
> model might help with efficiency, since we could avoid the copy when
> sending local messages.  The collector just needs to be run
> periodically (easy with an interpreter) and only needs to be informed
> about mutations.  It also eliminates issues with allocation in a
> process whose GC would be running.

Interesting.
 
> I'll look around and figure out which article it actually is that
> talks about it.

Please. 

-dg
-- 
David Gould                       510.628.3783 or 510.305.9468 
Informix Software                       300 Lakeside Drive  Oakland, CA 94612
You will cooperate with Microsoft, for the good of Microsoft
and for your own survival.                 -- Navindra Umanee




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