1 /* 2 * Copyright (c) 2012, 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_GC_SHARED_GCCONFIGURATION_HPP 26 #define SHARE_GC_SHARED_GCCONFIGURATION_HPP 27 28 #include "gc/shared/gcName.hpp" 29 #include "oops/compressedOops.hpp" 30 #include "utilities/globalDefinitions.hpp" 31 32 class GCConfiguration { 33 public: 34 GCName young_collector() const; 35 GCName old_collector() const; 36 uint num_parallel_gc_threads() const; 37 uint num_concurrent_gc_threads() const; 38 bool uses_dynamic_gc_threads() const; 39 bool is_explicit_gc_concurrent() const; 40 bool is_explicit_gc_disabled() const; 41 uintx gc_time_ratio() const; 42 43 bool has_pause_target_default_value() const; 44 uintx pause_target() const; 45 }; 46 47 class GCTLABConfiguration { 48 public: 49 bool uses_tlabs() const; 50 size_t min_tlab_size() const; 51 uint tlab_refill_waste_limit() const; 52 }; 53 54 class GCSurvivorConfiguration { 55 public: 56 intx initial_tenuring_threshold() const; 57 intx max_tenuring_threshold() const; 58 }; 59 60 class GCHeapConfiguration { 61 public: 62 size_t max_size() const; 63 size_t min_size() const; 64 size_t initial_size() const; 65 bool uses_compressed_oops() const; 66 CompressedOops::Mode narrow_oop_mode() const; 67 uint object_alignment_in_bytes() const; 68 int heap_address_size_in_bits() const; 69 }; 70 71 class GCYoungGenerationConfiguration { 72 public: 73 bool has_max_size_default_value() const; 74 uintx max_size() const; 75 76 uintx min_size() const; 77 intx new_ratio() const; 78 }; 79 80 #endif // SHARE_GC_SHARED_GCCONFIGURATION_HPP 81