1 /* 2 * Copyright (c) 2018, 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 #ifndef SHARE_GC_Z_Z_GLOBALS_HPP 25 #define SHARE_GC_Z_Z_GLOBALS_HPP 26 27 #define GC_Z_FLAGS(develop, \ 28 develop_pd, \ 29 product, \ 30 product_pd, \ 31 diagnostic, \ 32 diagnostic_pd, \ 33 experimental, \ 34 notproduct, \ 35 manageable, \ 36 product_rw, \ 37 lp64_product, \ 38 range, \ 39 constraint, \ 40 writeable) \ 41 \ 42 product(ccstr, ZPath, NULL, \ 43 "Filesystem path for Java heap backing storage " \ 44 "(must be a tmpfs or a hugetlbfs filesystem)") \ 45 \ 46 product(double, ZAllocationSpikeTolerance, 2.0, \ 47 "Allocation spike tolerance factor") \ 48 \ 49 product(double, ZFragmentationLimit, 25.0, \ 50 "Maximum allowed heap fragmentation") \ 51 \ 52 product(bool, ZStallOnOutOfMemory, true, \ 53 "Allow Java threads to stall and wait for GC to complete " \ 54 "instead of immediately throwing an OutOfMemoryError") \ 55 \ 56 product(size_t, ZMarkStacksMax, NOT_LP64(512*M) LP64_ONLY(8*G), \ 57 "Maximum number of bytes allocated for marking stacks") \ 58 range(32*M, NOT_LP64(512*M) LP64_ONLY(1024*G)) \ 59 \ 60 product(uint, ZCollectionInterval, 0, \ 61 "Force GC at a fixed time interval (in seconds)") \ 62 \ 63 product(uint, ZStatisticsInterval, 10, \ 64 "Time between statistics print outs (in seconds)") \ 65 range(1, (uint)-1) \ 66 \ 67 diagnostic(bool, ZStatisticsForceTrace, false, \ 68 "Force tracing of ZStats") \ 69 \ 70 diagnostic(bool, ZUnmapBadViews, false, \ 71 "Unmap bad (inactive) heap views") \ 72 \ 73 diagnostic(bool, ZVerifyMarking, false, \ 74 "Verify marking stacks") \ 75 \ 76 diagnostic(bool, ZVerifyForwarding, false, \ 77 "Verify forwarding tables") \ 78 \ 79 diagnostic(bool, ZSymbolTableUnloading, false, \ 80 "Unload unused VM symbols") \ 81 \ 82 diagnostic(bool, ZWeakRoots, true, \ 83 "Treat JNI WeakGlobalRefs and StringTable as weak roots") \ 84 \ 85 diagnostic(bool, ZConcurrentVMWeakHandles, true, \ 86 "Clean VM WeakHandles concurrently") \ 87 \ 88 diagnostic(bool, ZConcurrentJNIWeakGlobalHandles, true, \ 89 "Clean JNI WeakGlobalRefs concurrently") \ 90 \ 91 diagnostic(bool, ZOptimizeLoadBarriers, true, \ 92 "Apply load barrier optimizations") \ 93 \ 94 develop(bool, ZVerifyLoadBarriers, false, \ 95 "Verify that reference loads are followed by barriers") 96 97 #endif // SHARE_GC_Z_Z_GLOBALS_HPP