1 /*
   2  * Copyright (c) 2018, 2020, 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 #include "utilities/macros.hpp"
  28 #if INCLUDE_ZGC
  29 #include "runtime/flags/jvmFlag.hpp"
  30 PRODUCT_FLAG(double,   ZAllocationSpikeTolerance, 2.0, JVMFlag::DEFAULT,
  31                        "Allocation spike tolerance factor");
  32 
  33 PRODUCT_FLAG(double,   ZFragmentationLimit, 25.0, JVMFlag::DEFAULT,
  34                        "Maximum allowed heap fragmentation");
  35 
  36 PRODUCT_FLAG(size_t,   ZMarkStackSpaceLimit, 8*G, JVMFlag::RANGE,
  37                        "Maximum number of bytes allocated for mark stacks");
  38    FLAG_RANGE(         ZMarkStackSpaceLimit, 32*M, 1024*G);
  39 
  40 PRODUCT_FLAG(uint,     ZCollectionInterval, 0, JVMFlag::DEFAULT,
  41                        "Force GC at a fixed time interval (in seconds)");
  42 
  43 PRODUCT_FLAG(bool,     ZProactive, true, JVMFlag::DEFAULT,
  44                        "Enable proactive GC cycles");
  45 
  46 PRODUCT_FLAG(bool,     ZUncommit, true, JVMFlag::DEFAULT,
  47                        "Uncommit unused memory");
  48 
  49 PRODUCT_FLAG(uintx,    ZUncommitDelay, 5 * 60, JVMFlag::DEFAULT,
  50                        "Uncommit memory if it has been unused for the specified "
  51                        "amount of time (in seconds)");
  52 
  53 PRODUCT_FLAG(uint,     ZStatisticsInterval, 10, JVMFlag::DIAGNOSTIC | JVMFlag::RANGE,
  54                        "Time between statistics print outs (in seconds)");
  55    FLAG_RANGE(         ZStatisticsInterval, 1, (uint)-1);
  56 
  57 PRODUCT_FLAG(bool,     ZVerifyViews, false, JVMFlag::DIAGNOSTIC,
  58                        "Verify heap view accesses");
  59 
  60 PRODUCT_FLAG(bool,     ZVerifyRoots, trueInDebug, JVMFlag::DIAGNOSTIC,
  61                        "Verify roots");
  62 
  63 PRODUCT_FLAG(bool,     ZVerifyObjects, false, JVMFlag::DIAGNOSTIC,
  64                        "Verify objects");
  65 
  66 PRODUCT_FLAG(bool,     ZVerifyMarking, trueInDebug, JVMFlag::DIAGNOSTIC,
  67                        "Verify marking stacks");
  68 
  69 PRODUCT_FLAG(bool,     ZVerifyForwarding, false, JVMFlag::DIAGNOSTIC,
  70                        "Verify forwarding tables");
  71 #endif // INCLUDE_ZGC
  72 
  73 #endif // SHARE_GC_Z_Z_GLOBALS_HPP