src/hotspot/share/gc/z/z_globals.hpp

/*
 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * questions.
 */

#ifndef SHARE_GC_Z_Z_GLOBALS_HPP
#define SHARE_GC_Z_Z_GLOBALS_HPP

#define GC_Z_FLAGS(develop,                                                 \
                   develop_pd,                                              \
                   product,                                                 \
                   product_pd,                                              \
                   diagnostic,                                              \
                   diagnostic_pd,                                           \
                   experimental,                                            \
                   notproduct,                                              \
                   manageable,                                              \
                   product_rw,                                              \
                   lp64_product,                                            \
                   range,                                                   \
                   constraint,                                              \
                   writeable)                                               \
                                                                            \
  product(ccstr, ZPath, NULL,                                               \
          "Filesystem path for Java heap backing storage "                  \
          "(must be a tmpfs or a hugetlbfs filesystem)")                    \
                                                                            \
  product(double, ZAllocationSpikeTolerance, 2.0,                           \
          "Allocation spike tolerance factor")                              \
                                                                            \
  product(double, ZFragmentationLimit, 25.0,                                \
          "Maximum allowed heap fragmentation")                             \
                                                                            \
  product(bool, ZStallOnOutOfMemory, true,                                  \
          "Allow Java threads to stall and wait for GC to complete "        \
          "instead of immediately throwing an OutOfMemoryError")            \
                                                                            \
  product(size_t, ZMarkStacksMax, NOT_LP64(512*M) LP64_ONLY(8*G),           \
          "Maximum number of bytes allocated for marking stacks")           \
          range(32*M, NOT_LP64(512*M) LP64_ONLY(1024*G))                    \
                                                                            \
  product(uint, ZCollectionInterval, 0,                                     \
          "Force GC at a fixed time interval (in seconds)")                 \
                                                                            \
  product(uint, ZStatisticsInterval, 10,                                    \
          "Time between statistics print outs (in seconds)")                \
          range(1, (uint)-1)                                                \
                                                                            \
  diagnostic(bool, ZStatisticsForceTrace, false,                            \
          "Force tracing of ZStats")                                        \
                                                                            \
  diagnostic(bool, ZProactive, true,                                        \
          "Enable proactive GC cycles")                                     \
                                                                            \
  diagnostic(bool, ZUnmapBadViews, false,                                   \
          "Unmap bad (inactive) heap views")                                \
                                                                            \
  diagnostic(bool, ZVerifyMarking, false,                                   \
          "Verify marking stacks")                                          \
                                                                            \
  diagnostic(bool, ZVerifyForwarding, false,                                \
          "Verify forwarding tables")                                       \
                                                                            \
  diagnostic(bool, ZSymbolTableUnloading, false,                            \
          "Unload unused VM symbols")                                       \
                                                                            \
  diagnostic(bool, ZWeakRoots, true,                                        \
          "Treat JNI WeakGlobalRefs and StringTable as weak roots")         \
                                                                            \
  diagnostic(bool, ZConcurrentStringTable, true,                            \
          "Clean StringTable concurrently")                                 \
                                                                            \
  diagnostic(bool, ZConcurrentVMWeakHandles, true,                          \
          "Clean VM WeakHandles concurrently")                              \
                                                                            \
  diagnostic(bool, ZConcurrentJNIWeakGlobalHandles, true,                   \
          "Clean JNI WeakGlobalRefs concurrently")                          \
                                                                            \
  diagnostic(bool, ZOptimizeLoadBarriers, true,                             \
          "Apply load barrier optimizations")                               \
                                                                            \
  develop(bool, ZVerifyLoadBarriers, false,                                 \
          "Verify that reference loads are followed by barriers")

#endif // SHARE_GC_Z_Z_GLOBALS_HPP