jdk8-mips64-public/hotspot: comparison src/share/vm/gc_implementation/concurrentMarkSweep/compactibleFreeListSpace.cpp

-:9a7135d0a309
+:7386b3a385ac
 _indexedFreeList[i].set_protecting_lock(_indexedFreeListParLocks[i]);
 )
 }
 _dictionary->set_par_lock(&_parDictionaryAllocLock);
 }
+_used_stable = 0;
 }
 // Like CompactibleSpace forward() but always calls cross_threshold() to
 // update the block offset table.  Removed initialize_threshold call because
 // CFLS does not use a block offset array for contiguous spaces.
 return fc->is_free();
 }
 size_t CompactibleFreeListSpace::used() const {
 return capacity() - free();
+}
+size_t CompactibleFreeListSpace::used_stable() const {
+return _used_stable;
+}
+void CompactibleFreeListSpace::recalculate_used_stable() {
+_used_stable = used();
 }
 size_t CompactibleFreeListSpace::free() const {
 // "MT-safe, but not MT-precise"(TM), if you will: i.e.
 // if you do this while the structures are in flux you
 // be a single block, but not one which is unallocated.
 _bt.verify_single_block(res, size);
 _bt.verify_not_unallocated(res, size);
 // mangle a just allocated object with a distinct pattern.
 debug_only(fc->mangleAllocated(size));
+}
+// During GC we do not need to recalculate the stable used value for
+// every allocation in old gen. It is done once at the end of GC instead
+// for performance reasons.
+if (!Universe::heap()->is_gc_active()) {
+recalculate_used_stable();
 }
 return res;
 }

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