Summary

Obsolete the following VM product options due to removal of corresponding functionality:

• G1ConcRSLogCacheSize
• G1ConcRSHotCardLimit

Problem

The G1 Hot Card Cache is being removed because we observed no performance difference whether it is enabled or disabled in various benchmarks tested. So the corresponding flags to configure it are meaningless now.

Solution

Obsolete the following VM product options, without any deprecation period:

• G1ConcRSLogCacheSize
• G1ConcRSHotCardLimit

Specification

https://github.com/openjdk/jdk/pull/12452

-  product(size_t, G1ConcRSLogCacheSize, 10,                                 \
-          "Log base 2 of the length of conc RS hot-card cache.")            \
-          range(0, 27)                                                      \
-                                                                            \
-  product(uintx, G1ConcRSHotCardLimit, 4,                                   \
-          "The threshold that defines (>=) a hot card.")                    \
-          range(0, max_jubyte)                                              \
-                                                                            \