RFR (XS) JDK-8015272: Make @Contended within the same group to use the same oop map

[Christian Tornqvist]

Hi Aleksey

We're well past Feature Complete (May 23) and Zero Bug Bounce is around the
corner, this is not the time to push enhancements. In my opinion this should
be done in the next 8u or in jdk9.

Thanks,
Christian

-----Original Message-----
From: hotspot-runtime-dev-bounces at openjdk.java.net
[mailto:hotspot-runtime-dev-bounces at openjdk.java.net] On Behalf Of Aleksey
Shipilev
Sent: Sunday, October 13, 2013 12:11 PM
To: hotspot-runtime-dev at openjdk.java.net
Subject: RFR (XS) JDK-8015272: Make @Contended within the same group to use
the same oop map

Hi,

Please review the simple improvement:
  http://cr.openjdk.java.net/~shade/8015272/webrev.00/

I have copy-pasted the same block from the non- at Contended handling, because
it is generic for both cases. The change is also on the path which is
excercized only with @Contended with the same tag. Both @Contended
regression tests cover this case, as well as j.l.Thread containing
@Contended over the TLR state implicitly tests it in every VM run.

Testing:
 - Linux x86_64 fastdebug/release: all hotspot/test/runtime jtreg
 - JPRT full cycle against hotspot-rt
 - vm.quick (running)

-Aleksey.