graal-compiler: src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp comparison

comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17764:595c0f60d50d

8029075: String deduplication in G1 Summary: Implementation of JEP 192, http://openjdk.java.net/jeps/192 Reviewed-by: brutisso, tschatzl, coleenp

author	pliden
date	Tue, 18 Mar 2014 19:07:22 +0100
parents	bc22cbb8b45a
children	2775f322649a

comparison

equal deleted inserted replaced

-:6e7e363c5a8f
+:595c0f60d50d
 #include "gc_implementation/g1/g1GCPhaseTimes.hpp"
 #include "gc_implementation/g1/g1Log.hpp"
 #include "gc_implementation/g1/g1MarkSweep.hpp"
 #include "gc_implementation/g1/g1OopClosures.inline.hpp"
 #include "gc_implementation/g1/g1RemSet.inline.hpp"
+#include "gc_implementation/g1/g1StringDedup.hpp"
 #include "gc_implementation/g1/g1YCTypes.hpp"
 #include "gc_implementation/g1/heapRegion.inline.hpp"
 #include "gc_implementation/g1/heapRegionRemSet.hpp"
 #include "gc_implementation/g1/heapRegionSeq.inline.hpp"
 #include "gc_implementation/g1/vm_operations_g1.hpp"
 // Do create of the monitoring and management support so that
 // values in the heap have been properly initialized.
 _g1mm = new G1MonitoringSupport(this);
+G1StringDedup::initialize();
 return JNI_OK;
 }
 size_t G1CollectedHeap::conservative_max_heap_alignment() {
 return HeapRegion::max_region_size();
 }
 }
 if (!silent) gclog_or_tty->print("RemSet ");
 rem_set()->verify();
+if (G1StringDedup::is_enabled()) {
+if (!silent) gclog_or_tty->print("StrDedup ");
+G1StringDedup::verify();
+}
 if (failures) {
 gclog_or_tty->print_cr("Heap:");
 // It helps to have the per-region information in the output to
 // help us track down what went wrong. This is why we call
 // print_extended_on() instead of print_on().
 #endif
 gclog_or_tty->flush();
 }
 guarantee(!failures, "there should not have been any failures");
 } else {
-if (!silent)
+if (!silent) {
-gclog_or_tty->print("(SKIPPING roots, heapRegionSets, heapRegions, remset) ");
+gclog_or_tty->print("(SKIPPING Roots, HeapRegionSets, HeapRegions, RemSet");
+if (G1StringDedup::is_enabled()) {
+gclog_or_tty->print(", StrDedup");
+}
+gclog_or_tty->print(") ");
+}
 }
 }
 void G1CollectedHeap::verify(bool silent) {
 verify(silent, VerifyOption_G1UsePrevMarking);
 }
 _cmThread->print_on(st);
 st->cr();
 _cm->print_worker_threads_on(st);
 _cg1r->print_worker_threads_on(st);
+if (G1StringDedup::is_enabled()) {
+G1StringDedup::print_worker_threads_on(st);
+}
 }
 void G1CollectedHeap::gc_threads_do(ThreadClosure* tc) const {
 if (G1CollectedHeap::use_parallel_gc_threads()) {
 workers()->threads_do(tc);
 }
 tc->do_thread(_cmThread);
 _cg1r->threads_do(tc);
+if (G1StringDedup::is_enabled()) {
+G1StringDedup::threads_do(tc);
+}
 }
 void G1CollectedHeap::print_tracing_info() const {
 // We'll overload this to mean "trace GC pause statistics."
 if (TraceGen0Time || TraceGen1Time) {
 age_table()->add(obj, word_sz);
 } else {
 obj->set_mark(m);
 }
+if (G1StringDedup::is_enabled()) {
+G1StringDedup::enqueue_from_evacuation(from_region->is_young(),
+to_region->is_young(),
+queue_num(),
+obj);
+}
 size_t* surv_young_words = surviving_young_words();
 surv_young_words[young_index] += word_sz;
 if (obj->is_objArray() && arrayOop(obj)->length() >= ParGCArrayScanChunk) {
 // We keep track of the next start index in the length field of
 "strings: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed, "
 "symbols: "SIZE_FORMAT" processed, "SIZE_FORMAT" removed",
 g1_unlink_task.strings_processed(), g1_unlink_task.strings_removed(),
 g1_unlink_task.symbols_processed(), g1_unlink_task.symbols_removed());
 }
+if (G1StringDedup::is_enabled()) {
+G1StringDedup::unlink(is_alive);
+}
 }
 class RedirtyLoggedCardTableEntryFastClosure : public CardTableEntryClosure {
 public:
 bool do_card_ptr(jbyte* card_ptr, int worker_i) {
 // Weak root processing.
 {
 G1STWIsAliveClosure is_alive(this);
 G1KeepAliveClosure keep_alive(this);
 JNIHandles::weak_oops_do(&is_alive, &keep_alive);
+if (G1StringDedup::is_enabled()) {
+G1StringDedup::unlink_or_oops_do(&is_alive, &keep_alive);
+}
 }
 release_gc_alloc_regions(n_workers, evacuation_info);
 g1_rem_set()->cleanup_after_oops_into_collection_set_do();
 if (!free_list_only) {
 TearDownRegionSetsClosure cl(&_old_set);
 heap_region_iterate(&cl);
-// Need to do this after the heap iteration to be able to
+// Note that emptying the _young_list is postponed and instead done as
-// recognize the young regions and ignore them during the iteration.
+// the first step when rebuilding the regions sets again. The reason for
-_young_list->empty_list();
+// this is that during a full GC string deduplication needs to know if
+// a collected region was young or old when the full GC was initiated.
 }
 _free_list.remove_all();
 }
 class RebuildRegionSetsClosure : public HeapRegionClosure {
 }
 };
 void G1CollectedHeap::rebuild_region_sets(bool free_list_only) {
 assert_at_safepoint(true /* should_be_vm_thread */);
+if (!free_list_only) {
+_young_list->empty_list();
+}
 RebuildRegionSetsClosure cl(free_list_only, &_old_set, &_free_list);
 heap_region_iterate(&cl);
 if (!free_list_only) {

Mercurial > hg > graal-compiler

comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.cpp @ 17764:595c0f60d50d