mono/sgen/sgen-simple-nursery.c

   1 /**
   2  * \file
   3  * Simple always promote nursery.
   4  *
   5  * Copyright 2001-2003 Ximian, Inc
   6  * Copyright 2003-2010 Novell, Inc.
   7  * Copyright 2011 Xamarin Inc (http://www.xamarin.com)
   8  * Copyright (C) 2012 Xamarin Inc
   9  *
  10  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  11  */
  12
  13 #include "config.h"
  14 #ifdef HAVE_SGEN_GC
  15
  16 #include <string.h>
  17
  18 #include "mono/sgen/sgen-gc.h"
  19 #include "mono/sgen/sgen-protocol.h"
  20 #include "mono/sgen/sgen-layout-stats.h"
  21 #include "mono/sgen/sgen-client.h"
  22 #include "mono/sgen/sgen-workers.h"
  23 #include "mono/utils/mono-memory-model.h"
  24 #include "mono/utils/mono-proclib.h"
  25
  26 static inline GCObject*
  27 alloc_for_promotion (GCVTable vtable, GCObject *obj, size_t objsize, gboolean has_references)
  28 {
  29         total_promoted_size += objsize;
  30         return major_collector.alloc_object (vtable, objsize, has_references);
  31 }
  32
  33 static inline GCObject*
  34 alloc_for_promotion_par (GCVTable vtable, GCObject *obj, size_t objsize, gboolean has_references)
  35 {
  36         /*
  37          * FIXME
  38          * Note that the stat is not precise. total_promoted_size incrementing is not atomic and
  39          * even in that case, the same object might be promoted simultaneously by different workers
  40          * leading to one of the allocated major object to be discarded.
  41          */
  42         total_promoted_size += objsize;
  43         return major_collector.alloc_object_par (vtable, objsize, has_references);
  44 }
  45
  46 static SgenFragment*
  47 build_fragments_get_exclude_head (void)
  48 {
  49         return NULL;
  50 }
  51
  52 static void
  53 build_fragments_release_exclude_head (void)
  54 {
  55 }
  56
  57 static void
  58 build_fragments_finish (SgenFragmentAllocator *allocator)
  59 {
  60 }
  61
  62 static void
  63 prepare_to_space (char *to_space_bitmap, size_t space_bitmap_size)
  64 {
  65 }
  66
  67 static void
  68 clear_fragments (void)
  69 {
  70 }
  71
  72 static void
  73 init_nursery (SgenFragmentAllocator *allocator, char *start, char *end)
  74 {
  75         char *nursery_limit = sgen_nursery_start + sgen_nursery_size;
  76
  77         if (start < nursery_limit && end > nursery_limit) {
  78                 sgen_fragment_allocator_add (allocator, start, nursery_limit);
  79                 sgen_fragment_allocator_add (allocator, nursery_limit, end);
  80         } else {
  81                 sgen_fragment_allocator_add (allocator, start, end);
  82         }
  83 }
  84
  85
  86 /******************************************Copy/Scan functins ************************************************/
  87
  88 #define collector_pin_object(obj, queue) sgen_pin_object (obj, queue);
  89 #define COLLECTOR_SERIAL_ALLOC_FOR_PROMOTION alloc_for_promotion
  90 #define COLLECTOR_PARALLEL_ALLOC_FOR_PROMOTION alloc_for_promotion_par
  91
  92 #define COPY_OR_MARK_PARALLEL
  93 #include "sgen-copy-object.h"
  94
  95 #define SGEN_SIMPLE_NURSERY
  96
  97 #include "sgen-minor-copy-object.h"
  98 #include "sgen-minor-scan-object.h"
  99
 100 static void
 101 fill_serial_ops (SgenObjectOperations *ops)
 102 {
 103         ops->copy_or_mark_object = SERIAL_COPY_OBJECT;
 104         FILL_MINOR_COLLECTOR_SCAN_OBJECT (ops);
 105 }
 106
 107 #define SGEN_SIMPLE_PAR_NURSERY
 108
 109 #include "sgen-minor-copy-object.h"
 110 #include "sgen-minor-scan-object.h"
 111
 112 static void
 113 fill_parallel_ops (SgenObjectOperations *ops)
 114 {
 115         ops->copy_or_mark_object = SERIAL_COPY_OBJECT;
 116         FILL_MINOR_COLLECTOR_SCAN_OBJECT (ops);
 117 }
 118
 119 #undef SGEN_SIMPLE_PAR_NURSERY
 120 #define SGEN_CONCURRENT_MAJOR
 121
 122 #include "sgen-minor-copy-object.h"
 123 #include "sgen-minor-scan-object.h"
 124
 125 static void
 126 fill_serial_with_concurrent_major_ops (SgenObjectOperations *ops)
 127 {
 128         ops->copy_or_mark_object = SERIAL_COPY_OBJECT;
 129         FILL_MINOR_COLLECTOR_SCAN_OBJECT (ops);
 130 }
 131
 132 #define SGEN_SIMPLE_PAR_NURSERY
 133
 134 #include "sgen-minor-copy-object.h"
 135 #include "sgen-minor-scan-object.h"
 136
 137 static void
 138 fill_parallel_with_concurrent_major_ops (SgenObjectOperations *ops)
 139 {
 140         ops->copy_or_mark_object = SERIAL_COPY_OBJECT;
 141         FILL_MINOR_COLLECTOR_SCAN_OBJECT (ops);
 142 }
 143
 144 void
 145 sgen_simple_nursery_init (SgenMinorCollector *collector, gboolean parallel)
 146 {
 147         if (mono_cpu_count () <= 1)
 148                 parallel = FALSE;
 149
 150         collector->is_split = FALSE;
 151         collector->is_parallel = parallel;
 152
 153         collector->alloc_for_promotion = alloc_for_promotion;
 154         collector->alloc_for_promotion_par = alloc_for_promotion_par;
 155
 156         collector->prepare_to_space = prepare_to_space;
 157         collector->clear_fragments = clear_fragments;
 158         collector->build_fragments_get_exclude_head = build_fragments_get_exclude_head;
 159         collector->build_fragments_release_exclude_head = build_fragments_release_exclude_head;
 160         collector->build_fragments_finish = build_fragments_finish;
 161         collector->init_nursery = init_nursery;
 162
 163         fill_serial_ops (&collector->serial_ops);
 164         fill_serial_with_concurrent_major_ops (&collector->serial_ops_with_concurrent_major);
 165         fill_parallel_ops (&collector->parallel_ops);
 166         fill_parallel_with_concurrent_major_ops (&collector->parallel_ops_with_concurrent_major);
 167
 168         /*
 169          * The nursery worker context is created first so it will have priority over
 170          * concurrent mark and concurrent sweep.
 171          */
 172         if (parallel)
 173                 sgen_workers_create_context (GENERATION_NURSERY, mono_cpu_count ());
 174 }
 175
 176
 177 #endif