1 /* 2 * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #ifndef SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP 26 #define SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP 27 28 #include "memory/allocation.hpp" 29 #include "memory/metaspace/counter.hpp" 30 31 namespace metaspace { 32 33 class ClassLoaderMetaspace; 34 35 // These are running counters for some basic Metaspace statistics. 36 // Their value can be obtained quickly without locking. 37 38 class RunningCounters : public AllStatic { 39 40 friend class ClassLoaderMetaspace; 41 42 // ---- in-use chunks ---- 43 44 // Used space, in words. 45 // (Note that the used counter is on the hot path of Metaspace allocation. 46 // Do we really need it? We may get by with capacity only and get more details 47 // with get_statistics_slow().) 48 static SizeAtomicCounter _used_class; 49 static SizeAtomicCounter _used_nonclass; 50 51 public: 52 53 // ---- virtual memory ----- 54 55 // Return reserved size, in words, for Metaspace 56 static size_t reserved_words(); 57 static size_t reserved_words_class(); 58 static size_t reserved_words_nonclass(); 59 60 // Return total committed size, in words, for Metaspace 61 static size_t committed_words(); 62 static size_t committed_words_class(); 63 static size_t committed_words_nonclass(); 64 65 66 // ---- used chunks ----- 67 68 // Returns size, in words, used for metadata. 69 static size_t used_words(); 70 static size_t used_words_class(); 71 static size_t used_words_nonclass(); 72 73 // ---- free chunks ----- 74 75 // Returns size, in words, of all chunks in all freelists. 76 static size_t free_chunks_words(); 77 static size_t free_chunks_words_class(); 78 static size_t free_chunks_words_nonclass(); 79 80 81 }; 82 83 } // namespace metaspace 84 85 #endif // SHARE_MEMORY_METASPACE_RUNNINGCOUNTERS_HPP 86 87