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

[Igor Veresov]

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