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Re: Projects

To: "Jonathan P. Olson" <olson at mmsi dot com>
Subject: Re: Projects
From: Tom Tromey <tromey at cygnus dot com>
Date: Tue, 9 May 2000 11:10:38 -0700 (PDT)
Cc: minyard at acm dot org, Tom Tromey <tromey at cygnus dot com>, green at cygnus dot com, java-discuss at sourceware dot cygnus dot com
References: <200004271348.GAA23627@fencer.cygnus.com><0005040853430S.15141@jpo-laptop.mmsi.com><m2n1m2ug28.fsf@c469597-a.grlnd1.tx.home.com><00050807471700.24621@jpo-laptop.mmsi.com>

>>>>> "Jon" == Jonathan P Olson <olson@mmsi.com> writes:

Jon> Considering the 50% overhead I get with Java metadata, lossage
Jon> from GC seems miniscule.

You've mentioned the possibility of compressing this data.
We're accepting patches :-)
Or, failing that, if you have a definite plan we could at least add it
to the projects page.

Jon> To be actually useful for precise collection, you really need a
Jon> separate data structure containing a bit for each pointer in an
Jon> allocation.

I added code to gcc to use the previously unused vtable slot to hold a
bitmap description of the object.  Hans has changed the GC to use this
information.  Bryce has been working on integrating the two.

Tom

Follow-Ups:
- Re: Projects
  - From: Jon Olson

References:
- Re: Projects
  - From: Jonathan P. Olson
- Re: Projects
  - From: Corey Minyard
- Re: Projects
  - From: Jonathan P. Olson

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