RFR: 8252221: Use multiple workers for Parallel GC pre-touching [v5]

[Kim Barrett]

On Wed, 14 Oct 2020 06:26:44 GMT, Amit Pawar <github.com+71302734+amitdpawar at openjdk.org> wrote:

>> Please review this change.
>
> Amit Pawar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updated filename and pointer_delta used for pointer subtraction.

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/180