On Friday, 2 January 2015 at 23:56:44 UTC, Ola Fosheim Grøstad
wrote:
On Friday, 2 January 2015 at 23:10:46 UTC, John Colvin wrote:
What significant optimisations does SC-DRF actually prevent?
By "SC-DRF" I assume you mean the Java memory model.
The Java, C11 and C++11 memory model.
AFAIK SCDRF just means that if you syncronize correctly
(manually) then you will get sequential consistency
(restriction on the compiler).
That sounds like a correct description of it to me, yes.
Getting rid of the restrictions on the compiler and eliding
programmer-provided syncronization allows for more
optimizations on loads, writes, reordering,
syncronization/refcounting...?
Yes, I was hoping that perhaps you knew more specifics. AFAIK,
when not restricted by any kind of barriers, SC-DRF does not have
a particularly significant cost.
