[8u20] backport RFR (XL) 8031320: Use Intel RTM instructions for locks

[Daniel D. Daugherty]

Also thumbs up on the backport plan.

Dan


On 3/25/14 12:30 AM, Igor Veresov wrote:
> Sounds good.
>
> igor
>
> On Mar 24, 2014, at 11:16 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:
>
>> These changes were pushed into jdk9 last week.
>> Changes from jdk9 applied to 8u without conflicts but I have to modify flags because this optimization will be only experimental in 8u20: all RTM flags in globals_x86.hpp are experimental for 8u20 (in jdk9 3 main flags were product).
>>
>> http://cr.openjdk.java.net/~kvn/8031320_8u/webrev/
>>
>> https://bugs.openjdk.java.net/browse/JDK-8031320
>> http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/2f459c5235f9
>> http://cr.openjdk.java.net/~kvn/8031320_9/webrev/
>>
>> I also will backport additional related small fixes:
>>
>> https://bugs.openjdk.java.net/browse/JDK-8038181
>> http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/7067df8672a0
>>
>> https://bugs.openjdk.java.net/browse/JDK-8038286
>> http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/2c76e6e9c04e
>>
>> Thanks,
>> Vladimir