8334097: Parallel: Obsolete HeapFirstMaximumCompactionCount

Reviewed-by: tschatzl, dholmes

Author: albertnetymk

src/hotspot/share/gc/parallel/parallel_globals.hpp

@@ -36,10 +36,6 @@
           "any dead space)")                                                \
           range(0, max_uintx)                                               \
                                                                             \
-  product(uintx, HeapFirstMaximumCompactionCount, 3,                        \
-          "The collection count for the first maximum compaction")          \
-          range(0, max_uintx)                                               \
-                                                                            \
   product(bool, UseMaximumCompactionOnSystemGC, true,                       \
           "Use maximum compaction in the Parallel Old garbage collector "   \
           "for a system GC")                                                \

src/hotspot/share/gc/parallel/psParallelCompact.cpp

@@ -837,8 +837,7 @@ bool PSParallelCompact::reassess_maximum_compaction(bool maximum_compaction,
   const uint total_invocations = ParallelScavengeHeap::heap()->total_full_collections();
   assert(total_invocations >= _maximum_compaction_gc_num, "sanity");
   const size_t gcs_since_max = total_invocations - _maximum_compaction_gc_num;
-  const bool is_interval_ended = gcs_since_max > HeapMaximumCompactionInterval
-                              || total_invocations == HeapFirstMaximumCompactionCount;
+  const bool is_interval_ended = gcs_since_max > HeapMaximumCompactionInterval;
 
   // If all regions in old-gen are full
   const bool is_region_full =

src/hotspot/share/runtime/arguments.cpp

@@ -519,6 +519,8 @@ static SpecialFlag const special_jvm_flags[] = {
   { "UseRTMDeopt",                  JDK_Version::jdk(23), JDK_Version::jdk(24), JDK_Version::jdk(25) },
   { "RTMRetryCount",                JDK_Version::jdk(23), JDK_Version::jdk(24), JDK_Version::jdk(25) },
 #endif // X86
+
+  { "HeapFirstMaximumCompactionCount", JDK_Version::undefined(), JDK_Version::jdk(24), JDK_Version::jdk(25) },
 #ifdef ASSERT
   { "DummyObsoleteTestFlag",        JDK_Version::undefined(), JDK_Version::jdk(18), JDK_Version::undefined() },
 #endif