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 

    25 #include "precompiled.hpp"

    26 #include "gc/g1/g1HeterogeneousCollectorPolicy.hpp"

    27 #include "gc/g1/g1HeterogeneousHeapYoungGenSizer.hpp"

    28 #include "gc/g1/heapRegion.hpp"

    29 

    30 G1HeterogeneousHeapYoungGenSizer::G1HeterogeneousHeapYoungGenSizer() : G1YoungGenSizer() {

    31   // will be used later when min and max young size is calculated.

    32   _max_young_length = (uint)(G1HeterogeneousCollectorPolicy::reasonable_max_memory_for_young() / HeapRegion::GrainBytes);

    33 }

    34 

    35 // Since heap is sized potentially to larger value accounting for dram + nvdimm, we need to limit

    36 // max young gen size to the available dram.

    37 // Call parent class method first and then adjust sizes based on available dram

    38 void G1HeterogeneousHeapYoungGenSizer::adjust_max_new_size(uint number_of_heap_regions) {

    39   G1YoungGenSizer::adjust_max_new_size(number_of_heap_regions);

    40   adjust_lengths_based_on_dram_memory();

    41 }

    42 

    43 void G1HeterogeneousHeapYoungGenSizer::heap_size_changed(uint new_number_of_heap_regions) {

    44   G1YoungGenSizer::heap_size_changed(new_number_of_heap_regions);

    45   adjust_lengths_based_on_dram_memory();

    46 }

    47 

    48 void G1HeterogeneousHeapYoungGenSizer::adjust_lengths_based_on_dram_memory() {

    49   _min_desired_young_length = MIN2(_min_desired_young_length, _max_young_length);

    50   _max_desired_young_length = MIN2(_max_desired_young_length, _max_young_length);

    51 }