RFR: 8218743: SA: Add support for large bitmaps
stefan.karlsson at oracle.com
Mon Feb 11 12:36:57 UTC 2019
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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