8373087: Parallel: Rename PSGenerationPool to PSOldGenerationPool

Reviewed-by: tschatzl, jsikstro, iwalulya

Author: albertnetymk

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

@@ -141,9 +141,9 @@ void ParallelScavengeHeap::initialize_serviceability() {
                                                 "PS Survivor Space",
                                                 false /* support_usage_threshold */);
 
-  _old_pool = new PSGenerationPool(_old_gen,
-                                   "PS Old Gen",
-                                   true /* support_usage_threshold */);
+  _old_pool = new PSOldGenerationPool(_old_gen,
+                                      "PS Old Gen",
+                                      true /* support_usage_threshold */);
 
   _young_manager = new GCMemoryManager("PS Scavenge");
   _old_manager = new GCMemoryManager("PS MarkSweep");

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

@@ -24,14 +24,14 @@
 
 #include "gc/parallel/psMemoryPool.hpp"
 
-PSGenerationPool::PSGenerationPool(PSOldGen* old_gen,
-                                   const char* name,
-                                   bool support_usage_threshold) :
+PSOldGenerationPool::PSOldGenerationPool(PSOldGen* old_gen,
+                                         const char* name,
+                                         bool support_usage_threshold) :
   CollectedMemoryPool(name, old_gen->capacity_in_bytes(),
                       old_gen->reserved().byte_size(), support_usage_threshold), _old_gen(old_gen) {
 }
 
-MemoryUsage PSGenerationPool::get_memory_usage() {
+MemoryUsage PSOldGenerationPool::get_memory_usage() {
   size_t maxSize   = (available_for_allocation() ? max_size() : 0);
   size_t used      = used_in_bytes();
   size_t committed = _old_gen->capacity_in_bytes();

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

@@ -31,12 +31,12 @@
 #include "services/memoryPool.hpp"
 #include "services/memoryUsage.hpp"
 
-class PSGenerationPool : public CollectedMemoryPool {
+class PSOldGenerationPool : public CollectedMemoryPool {
 private:
   PSOldGen* _old_gen;
 
 public:
-  PSGenerationPool(PSOldGen* pool, const char* name, bool support_usage_threshold);
+  PSOldGenerationPool(PSOldGen* pool, const char* name, bool support_usage_threshold);
 
   MemoryUsage get_memory_usage();
   size_t used_in_bytes() { return _old_gen->used_in_bytes(); }