[aarch64-port-dev ] OpenJDK extension to AArch64 and Windows

Andrew Dinn adinn at redhat.com
Thu Jun 25 16:11:13 UTC 2020

On 25/06/2020 16:05, Andrew Haley wrote:
> On 25/06/2020 15:49, Dalibor Topic wrote:
>> Typically such efforts would become with a porting Project of their own,
>> just as the aarch64-linux port did back in 2013 [1], as that allows a
>> community of developers across organizations to start to collaborate
>> around a shared repository, mailing list, etc. on a specific porting task.
>> It also makes it easier to do so, by allowing the initial set of
>> developers on the port to become committers on the new project from the
>> start, without having to work their way up to 8 or more significant
>> sponsored changes first [0]. So that's what I (with my Porting Group
>> Lead hat on) would usually recommend that course for new ports.
> That would be madness.
> The Windows port to AArch64 is vastly simpler than the aarch64-linux
> port by more than an order of magnitude, because the AArch64 back end
> barely changes at all and the Windows (x86) part doesn't change very
> much because it's mostly C++ code and the Windows APIs are pretty
> stable.
> The code as submitted by Microsoft is almost ready to go. Introducing
> a whole lot of process at this stage would be entirely inappropriate
> and greatly increase the work for both HotSpot developers and the
> Microsoft porters.
I agree entirely with Andrew. If you look at the webrevs provided by
Microsoft they are smaller than a great number of patches that have only
been covered by a JIRA issue. The amount of code touched and the
significance of the changes is far too small to merit a whole project
(or, I would say, a JEP).

To me this contribution is a relatively small extension of the work
covered by the existing AArch64 port. I cannot see any reason to smother
it in a bureaucratic process that is very unlikely to improve the
outcome and, indeed, much more likely to achieve the opposite.


Andrew Dinn
Red Hat Distinguished Engineer
Red Hat UK Ltd
Registered in England and Wales under Company Registration No. 03798903
Directors: Michael Cunningham, Michael ("Mike") O'Neill

More information about the hotspot-runtime-dev mailing list