RFR: 8218743: SA: Add support for large bitmaps
stefan.karlsson at oracle.com
Wed Feb 13 08:42:36 UTC 2019
On 2019-02-13 05:53, Jini George wrote:
> Hi Stefan,
> Looks good to me. Nits: pls do change the copyright year.
Thanks for reviewing. I'll update the copyright years.
> On 2/11/2019 6:06 PM, 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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