[8u] RFR (S) 8190974: Parallel stream execution within a custom ForkJoinPool should obey the parallelism

[Martin Buchholz]

Too bad Paul Sandoz is no longer working on openjdk.
Maybe Doug can review - he was involved with design of stream parallelism
IIRC.
I took a quick look - it Looks Good To Me.

(But I have misgivings about any sort of auto-parallelization, including
via parallel streams, which will become increasingly important as cpu
counts increase)

On Thu, May 2, 2019 at 10:45 AM Aleksey Shipilev <shade at redhat.com> wrote:

> Original fix:
>   https://bugs.openjdk.java.net/browse/JDK-8190974
>   http://hg.openjdk.java.net/jdk/jdk/rev/e0041b182e31
>
> This is one of the things that was mentioned multiple times as the pitfall
> in 8u. The patch itself
> is simple enough to consider backporting and fixing that pothole. Once
> related JDK-8154387 [1]
> backport is in, this patch applies with reshuffling to 8u, except for the
> test, which requires
> fitting to the old shape of Stream tests.
>
> 8u webrev:
>   http://cr.openjdk.java.net/~shade/8190974/webrev.8u.01/
>
> Testing: jdk_core tests, including the new test
>
> Thanks,
> -Aleksey
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8154387
>
>