Hi Max,
On 2018-08-06 17:55, mr rupplin wrote:
Clases, Hello.
Firstly thank you for replying. Of course our goal is to show the
strengths in the OpenJDK.
Some weeks ago we were working with the ClassFileTransformer as an
initial hook for a modest databasing proposal. We found it to be a
dead end.
Of course the company has greenlit further work into the area. We
would like to point out JDK did not have any way to hook the malloc
sequence at the time.
it's great that you're showing an interest in the platform and exploring
ways to extend/improve it.
It's somewhat coincidental that a lot of work happened in this
particular area recently.
Please refer us to the technical lay for the Overhead Heap-Profiling
reference you refer to; Ok.
I thought I already had, but it seems I referred to the initial
implementation RFE twice. Sorry about that..
The high-level JEP is here: http://openjdk.java.net/jeps/331
It has the high-level overview. From there you can click through to JBS
details for the JEP, and from there to the implementation.
For historical reference, initial discussion on the proposal here:
http://mail.openjdk.java.net/pipermail/serviceability-dev/2015-June/017543.html
There were a couple of code reviews done on open lists, but I think this
is the final round (and thread):
http://mail.openjdk.java.net/pipermail/serviceability-dev/2018-May/023668.html
On top of the Low-Overhead Heap Profiling JEP mentioned, JFR was also
open sourced in time for JDK 11. Perhaps it's memory allocation sampling
is of interest and a workable alternative.
HTH!
/Claes
