RFR: 8079315: UseCondCardMark broken in conjunction with CMS precleaning

Mikael Gerdin mikael.gerdin at oracle.com
Wed May 6 14:18:03 UTC 2015


Hi Andrew,

On 2015-05-05 16:52, Andrew Haley wrote:
> I've added StoreLoad barriers everywhere they're needed.
>
> http://cr.openjdk.java.net/~aph/8079315/
>
> This patch depends on the patch for 8078438, which is still not
> committed.  http://cr.openjdk.java.net/~shade/8078438/webrev.02/
>
> This is x86 only, will do AArch64 parts in a separate patch once
> we've agreed on this.

Taking this discussion down a slightly different route in a new thread, 
we could potentially change FinalMarking to look at all nonclean cards 
instead of only dirty cards if UseCondCardMark is enabled.

I suspect that there is a fair bit of performance work needed to 
determine which of these approaches is the most beneficial.

/Mikael

>
> Andrew.
>


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