review for 7029167: add support for conditional card marks
igor.veresov at oracle.com
Wed Mar 30 17:25:55 PDT 2011
Could you use CardTableModRefBS::dirty_card_val() instead of 0? I know
we use just zero already in many places, but I'm fresh from barrier
experimentation and it would've been much nicer if we used symbolic names.
On 3/30/11 4:46 PM, Tom Rodriguez wrote:
> 7029167: add support for conditional card marks
> Repeated updates to the card table can be a source of contention on
> multiprocessor machines that can greatly inhibit scalability. This
> adds support in C2 for conditional card marks. Tested with jbb and
> CTW. At some point this should be turned on automatically when multi
> socket machines are detected but that's covered under another bug as
> is C1 support.
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