Current heap layout of generational mark-sweep GC

[Neo Jia]

On 5/14/07, Jon Masamitsu <Jon.Masamitsu at sun.com> wrote:
> Neo,
>
> Are you asking specifically about CHeap usage by the
> garbage collector (i.e., you're not interested in the
> compiler's use CHeap space)?

Jon,

Although my question is about the CHeap usage by GC, I am also interested
in knowing the CHeap space usage of compiler.

Thanks,
Neo

>
> Jon
>
>
> Neo Jia wrote:
>
> > hi,
> >
> > I am wondering that for the generational mark-sweep GC, if the block
> > offset shared array is the last allocated object on the CHeap.
> >
> > The following is my understanding of the current heap layout:
> >
> > 1. The nursery space is on the lowest address
> > 2. The mature space is following the nursery address.
> > 3. The permanent space is following the nursery address at a higher
> > address.
> > 4. The card table is allocated from the end of the permanent space,
> > the regions inside it will be mapped to these previous three spaces
> > sequentially, from lower address to higher address.
> > 5. The block offset shared array used by the mature space will be
> > allocated at the end of the card table area, which is used by mature
> > space. And the virtual space size of this area will be set according
> > to the mature space and word bits.
> >
> > So, is there any space allocated following?
> >
> > Thanks,
> > Neo
>
>


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