RFR: 8218743: SA: Add support for large bitmaps
erik.osterlund at oracle.com
Thu Feb 14 09:11:53 UTC 2019
On 2019-02-11 13:36, Stefan Karlsson wrote:
> Hi all,
> Please review this patch to add support for large bitmaps in the SA.
> I've added a minimal interface (at, atPut, clear) that uses longs
> instead of ints, and changed MarkBits to use this interface.
> I've implemented a segmented bitmap that, currently, all GCs use when
> asked for a bitmap in MarkBits. Later ZGC will provide its own
> discontiguous bitmap, implementing the new interface, but that will be
> sent out as a separate RFE.
> I've tested this with a temporary patch that lowers the segment size and
> implements a jtreg test:
> I ran through the all the tests in serviceability/sa with both these
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