Memory used during GC

Calum --

Another approach that we use in a couple of places in Sun collectors
is to allocate a fixed size stack to hold references to grey objects.
If this stack overflows, record that fact, and at the end of marking
restart the marking process, traversing the heap to find marked
objects, treating them as roots.  This process will eventually
terminate.  With even quite small stacks relative to total heap size,
you can make this overflow quite unlikely (for "reasonable" programs
that don't have very long pointer chains.)

Hope this is useful...

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Dave Detlefs                           http://www.sunlabs.com/people/detlefs/
Sun Microsystems Laboratories                           [email protected]
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