Re: Best Ref-counting algorithms?

Hans Aberg <haberg_20080406@math.su.se>
Fri, 17 Jul 2009 13:09:40 +0200

          From comp.compilers
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From: Hans Aberg <haberg_20080406@math.su.se>
Newsgroups: comp.compilers
Date: Fri, 17 Jul 2009 13:09:40 +0200
Organization: Aioe.org NNTP Server
References: 09-07-018 09-07-032 09-07-038 09-07-040
Keywords: GC, comment
Posted-Date: 17 Jul 2009 14:47:00 EDT

Hans-Peter Diettrich wrote:
> GPS schrieb:


>> If a GC results in page transfers to/from the disk, then it will drastically
>> slow down the program, and system.


> Good point!


I felt so to.


Does this not suggest that at least a tracing GC should be moved into
the OS? It should have some way to mark allocated swapped out memory
unused without swapping back in.


      Hans
[Seems to me that it would be easy enough to provide system calls that allow
adequate control from user mode. VM/3370 had a user interface to the pager in
about 1970 to let an OS running in a virtual machine avoid double paging.
-John]

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