RFC: Experiment in accessing/managing persistent memory from Java

[Andrew Dinn]

Hi Paul,

Sorry for the delay in responding to this -- holiday and then an urgent
bug fix intervened . . .

On 08/06/18 01:42, Paul Sandoz wrote:
> Sandhya gave an overview to a few of us Oracle folks. I agree with
> what Sandhya says regarding the API, a small surface, and on pursuing
> an unsafe intrinsic. I like it and would encourage the writing of a
> draft JEP, especially to give this visibility.

Great! Thanks for your feedback (also to Sandhya). I'll start drafting a
JEP staright away. I'll also work on revising the current intrinsic
implementation so it is presented via Unsafe (which should be fairly
simple to achieve).

> It intersects with https://bugs.openjdk.java.net/browse/JDK-8153111
> ((bf) Allocating ByteBuffer on heterogeneous memory), which is
> attempting to be more generic.

Ok, thanks. I'll have a think about how we night try to integrate these
two approaches and see what I can work into the draft JEP.

> We might also need to increase the velocity on
> https://bugs.openjdk.java.net/browse/JDK-8180628 (retrofit direct
> buffer support for size beyond gigabyte scales), and i would be very
> interested your views on this, how you might be currently working
> around such size limitations, and what buffer enhancements would work
> for you.

I think Jonathan answered that better than I can in his response.
However, if this accelerates delivery of a fix for JDK-8180628 then all
to the good.

regards,


Andrew Dinn
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