RFR: 8268372: ZGC: dynamically select the number of concurrent GC threads used

Wed Jun 9 10:40:22 UTC 2021

On Tue, 8 Jun 2021 09:29:59 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> This patch adds support for dynamically selecting the number of GC threads to ZGC.
> 
> 1. The number of GC threads (in `[1, ConcGCThreads]`) is dynamically selected for each GC cycle.
> 2. Increase the default value of ConcGCThreads from 12.5% to 25% of total CPUs.

Thanks for the review.

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PR: https://git.openjdk.java.net/jdk/pull/4410