[jmm-dev] Update to description of JEP 193: Enhanced Volatiles

David M. Lloyd david.lloyd at redhat.com
Thu Oct 30 16:23:44 UTC 2014

On 10/30/2014 10:53 AM, Paul Sandoz wrote:
> On Oct 30, 2014, at 4:47 PM, Remi Forax <forax at univ-mlv.fr> wrote:
>> On 10/30/2014 03:02 PM, Paul Sandoz wrote:
>>> Hi,
>>> I have, with the help of Brian, Doug and John, updated the description of JEP 193: Enhanced Volatiles to reflect our current thinking based on:
>>> - the prototype implementation in valhalla;
>>> - performance measurements of that implementation; and
>>> - investigations related to signature polymorphic methods and invokedynamic.
>>> Thanks,
>>> Paul.
>> I seems that the changes are not propagated to the JEP yet,
>> but there are available throught the corresponding bug:
>>   https://bugs.openjdk.java.net/browse/JDK-8046183
> Doh! thanks, i forgot to send the link out,

Wow, that's even *more* convoluted.  Are we *certain* that we are 
actually improving on the original proposal here?  It seems to me like 
everyone can't jump on the *handle bandwagon fast enough, even though it 
seems to be objectively more complex from concept (that human engineers 
want to understand) to API (the previously proposed API was very much 
cleaner and didn't rely on cross-your-fingers magic to make inefficient 
things become efficient) to implementation (to this day, relatively few 
people outside of Oracle even have a glimmer of understanding as to the 
rules and behaviors of these things).

Are we *certain* this is an improvement?


More information about the jmm-dev mailing list