[Mono-dev] [Patch] Make Boehm GC stack scanning less aggressive

Rodrigo Kumpera kumpera at gmail.com
Thu Oct 22 17:04:27 EDT 2009

Hi Dick,

I believe there is very little reason to do development on libgc as sgen is
been worked and
advancing quite fast. I don't feel it's worth the risk of improving libgc.

SGen is only a few months away from been production ready and it might be a
better idea
to spend your energy there. For example, Code to do precise marking of
managed code is
still to be done and is an area that help would be more than welcome.

On Tue, Oct 20, 2009 at 12:44 PM, Dick Porter <dporter at codicesoftware.com>wrote:

> Hi all
> The attached patch makes the stack marking in libgc much less
> aggressive.  Instead of marking every object that happens to be pointed
> to by random numbers, it uses the descriptor-based scanning function
> instead.
> I think this is safe for mono, as (as was pointed out to me) every
> allocation has a descriptor.
> It fixes the stress-test that David posted a week or two ago, and in the
> real world it allows our server to free up much more memory.  It has
> been tested on a production server.
> Comments?
> - Dick
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