RFR: 8315781: Reduce the max value of GCDrainStackTargetSize

[Thomas Schatzl]

On Wed, 6 Sep 2023 12:20:01 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simple adjustment to the max value of `GCDrainStackTargetSize`.
> 
> I picked 8K because the default queue capacity is ~16K and G1 use 2x of `GCDrainStackTargetSize` as some threshold.

Lgtm. I think `8 * K` can be written there as well.

src/hotspot/share/gc/shared/gc_globals.hpp line 690:

> 688:           "Number of entries we will try to leave on the stack "            \
> 689:           "during parallel gc")                                             \
> 690:           range(0, 8*1024)                                                  \

Suggestion:

          range(0, 8 * 1024)                                                \

-------------

Marked as reviewed by tschatzl (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15590#pullrequestreview-1613218008
PR Review Comment: https://git.openjdk.org/jdk/pull/15590#discussion_r1317207597