1 /*

     2  * Copyright (c) 2012, 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 

    25 #ifndef SHARE_VM_GC_SHARED_GCCONFIGURATION_HPP

    26 #define SHARE_VM_GC_SHARED_GCCONFIGURATION_HPP

    27 

    28 #include "gc/shared/gcName.hpp"

    29 #include "memory/universe.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   Universe::NARROW_OOP_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_VM_GC_SHARED_GCCONFIGURATION_HPP