RFR: 8214761: Bug in parallel Kahan summation implementation [v2]

[Ian Graves]

On Wed, 21 Jul 2021 20:19:31 GMT, Ian Graves <igraves at openjdk.org> wrote:

>> 8214761: Bug in parallel Kahan summation implementation
>
> Ian Graves has updated the pull request incrementally with three additional commits since the last revision:
> 
>  - Updates with more test coverage
>  - stashing
>  - Stashing

Circling back on this. I've worked in the test from Ivan Gerasimov's email back when. It includes some additional comparisons to prior approaches to assert improvements in error.

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PR: https://git.openjdk.java.net/jdk/pull/4674