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111
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1 /* OpenACC Runtime Library Definitions.
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2
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145
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3 Copyright (C) 2013-2020 Free Software Foundation, Inc.
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111
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4
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5 Contributed by Mentor Embedded.
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6
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7 This file is part of the GNU Offloading and Multi Processing Library
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8 (libgomp).
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9
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10 Libgomp is free software; you can redistribute it and/or modify it
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11 under the terms of the GNU General Public License as published by
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12 the Free Software Foundation; either version 3, or (at your option)
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13 any later version.
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14
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15 Libgomp is distributed in the hope that it will be useful, but WITHOUT ANY
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16 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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17 FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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18 more details.
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19
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20 Under Section 7 of GPL version 3, you are granted additional
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21 permissions described in the GCC Runtime Library Exception, version
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22 3.1, as published by the Free Software Foundation.
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23
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24 You should have received a copy of the GNU General Public License and
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25 a copy of the GCC Runtime Library Exception along with this program;
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26 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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27 <http://www.gnu.org/licenses/>. */
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28
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29 #include <assert.h>
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145
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30 #include <string.h>
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111
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31 #include "openacc.h"
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32 #include "libgomp.h"
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33 #include "oacc-int.h"
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34
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145
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35 static struct goacc_thread *
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36 get_goacc_thread (void)
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111
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37 {
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38 struct goacc_thread *thr = goacc_thread ();
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39
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40 if (!thr || !thr->dev)
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41 gomp_fatal ("no device active");
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42
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145
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43 return thr;
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44 }
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45
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46 static int
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47 validate_async_val (int async)
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48 {
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49 if (!async_valid_p (async))
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50 gomp_fatal ("invalid async-argument: %d", async);
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51
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52 if (async == acc_async_sync)
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53 return -1;
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54
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55 if (async == acc_async_noval)
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56 return 0;
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57
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58 if (async >= 0)
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59 /* TODO: we reserve 0 for acc_async_noval before we can clarify the
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60 semantics of "default_async". */
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61 return 1 + async;
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62 else
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63 __builtin_unreachable ();
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64 }
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65
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66 /* Return the asyncqueue to be used for OpenACC async-argument ASYNC. This
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67 might return NULL if no asyncqueue is to be used. Otherwise, if CREATE,
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68 create the asyncqueue if it doesn't exist yet.
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69
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70 Unless CREATE, this will not generate any OpenACC Profiling Interface
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71 events. */
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72
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73 attribute_hidden struct goacc_asyncqueue *
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74 lookup_goacc_asyncqueue (struct goacc_thread *thr, bool create, int async)
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75 {
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76 async = validate_async_val (async);
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77 if (async < 0)
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78 return NULL;
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79
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80 struct goacc_asyncqueue *ret_aq = NULL;
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81 struct gomp_device_descr *dev = thr->dev;
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82
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83 gomp_mutex_lock (&dev->openacc.async.lock);
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84
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85 if (!create
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86 && (async >= dev->openacc.async.nasyncqueue
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87 || !dev->openacc.async.asyncqueue[async]))
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88 goto end;
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89
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90 if (async >= dev->openacc.async.nasyncqueue)
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91 {
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92 int diff = async + 1 - dev->openacc.async.nasyncqueue;
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93 dev->openacc.async.asyncqueue
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94 = gomp_realloc (dev->openacc.async.asyncqueue,
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95 sizeof (goacc_aq) * (async + 1));
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96 memset (dev->openacc.async.asyncqueue + dev->openacc.async.nasyncqueue,
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97 0, sizeof (goacc_aq) * diff);
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98 dev->openacc.async.nasyncqueue = async + 1;
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99 }
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100
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101 if (!dev->openacc.async.asyncqueue[async])
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102 {
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103 dev->openacc.async.asyncqueue[async]
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104 = dev->openacc.async.construct_func (dev->target_id);
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105
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106 if (!dev->openacc.async.asyncqueue[async])
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107 {
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108 gomp_mutex_unlock (&dev->openacc.async.lock);
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109 gomp_fatal ("async %d creation failed", async);
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110 }
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111
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112 /* Link new async queue into active list. */
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113 goacc_aq_list n = gomp_malloc (sizeof (struct goacc_asyncqueue_list));
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114 n->aq = dev->openacc.async.asyncqueue[async];
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115 n->next = dev->openacc.async.active;
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116 dev->openacc.async.active = n;
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117 }
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118
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119 ret_aq = dev->openacc.async.asyncqueue[async];
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120
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121 end:
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122 gomp_mutex_unlock (&dev->openacc.async.lock);
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123 return ret_aq;
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124 }
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125
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126 /* Return the asyncqueue to be used for OpenACC async-argument ASYNC. This
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127 might return NULL if no asyncqueue is to be used. Otherwise, create the
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128 asyncqueue if it doesn't exist yet. */
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129
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130 attribute_hidden struct goacc_asyncqueue *
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131 get_goacc_asyncqueue (int async)
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132 {
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133 struct goacc_thread *thr = get_goacc_thread ();
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134 return lookup_goacc_asyncqueue (thr, true, async);
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135 }
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136
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137 int
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138 acc_async_test (int async)
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139 {
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140 struct goacc_thread *thr = goacc_thread ();
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141
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142 if (!thr || !thr->dev)
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143 gomp_fatal ("no device active");
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144
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145 goacc_aq aq = lookup_goacc_asyncqueue (thr, false, async);
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146 if (!aq)
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147 return 1;
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148
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149 acc_prof_info prof_info;
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150 acc_api_info api_info;
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151 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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152 if (profiling_p)
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153 {
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154 prof_info.async = async;
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155 prof_info.async_queue = prof_info.async;
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156 }
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157
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158 int res = thr->dev->openacc.async.test_func (aq);
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159
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160 if (profiling_p)
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161 {
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162 thr->prof_info = NULL;
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163 thr->api_info = NULL;
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164 }
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165
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166 return res;
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167 }
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168
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169 int
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170 acc_async_test_all (void)
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171 {
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172 struct goacc_thread *thr = get_goacc_thread ();
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173
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174 acc_prof_info prof_info;
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175 acc_api_info api_info;
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176 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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177
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178 int ret = 1;
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179 gomp_mutex_lock (&thr->dev->openacc.async.lock);
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180 for (goacc_aq_list l = thr->dev->openacc.async.active; l; l = l->next)
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181 if (!thr->dev->openacc.async.test_func (l->aq))
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182 {
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183 ret = 0;
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184 break;
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185 }
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186 gomp_mutex_unlock (&thr->dev->openacc.async.lock);
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187
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188 if (profiling_p)
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189 {
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190 thr->prof_info = NULL;
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191 thr->api_info = NULL;
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192 }
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193
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194 return ret;
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111
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195 }
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196
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197 void
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198 acc_wait (int async)
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199 {
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145
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200 struct goacc_thread *thr = get_goacc_thread ();
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111
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201
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145
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202 goacc_aq aq = lookup_goacc_asyncqueue (thr, false, async);
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203 if (!aq)
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204 return;
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111
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205
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145
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206 acc_prof_info prof_info;
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207 acc_api_info api_info;
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208 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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209 if (profiling_p)
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210 {
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211 prof_info.async = async;
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212 prof_info.async_queue = prof_info.async;
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213 }
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111
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214
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145
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215 if (!thr->dev->openacc.async.synchronize_func (aq))
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216 gomp_fatal ("wait on %d failed", async);
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217
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218 if (profiling_p)
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219 {
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220 thr->prof_info = NULL;
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221 thr->api_info = NULL;
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222 }
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111
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223 }
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224
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225 /* acc_async_wait is an OpenACC 1.0 compatibility name for acc_wait. */
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226 #ifdef HAVE_ATTRIBUTE_ALIAS
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227 strong_alias (acc_wait, acc_async_wait)
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228 #else
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229 void
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230 acc_async_wait (int async)
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231 {
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232 acc_wait (async);
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233 }
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234 #endif
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235
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236 void
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237 acc_wait_async (int async1, int async2)
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238 {
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145
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239 struct goacc_thread *thr = get_goacc_thread ();
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240
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241 goacc_aq aq1 = lookup_goacc_asyncqueue (thr, false, async1);
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242 /* TODO: Is this also correct for acc_async_sync, assuming that in this case,
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243 we'll always be synchronous anyways? */
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244 if (!aq1)
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245 return;
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246
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247 acc_prof_info prof_info;
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248 acc_api_info api_info;
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249 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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250 if (profiling_p)
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251 {
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252 prof_info.async = async2;
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253 prof_info.async_queue = prof_info.async;
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254 }
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111
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255
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145
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256 goacc_aq aq2 = lookup_goacc_asyncqueue (thr, true, async2);
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257 /* An async queue is always synchronized with itself. */
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258 if (aq1 == aq2)
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259 goto out_prof;
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111
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260
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145
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261 if (aq2)
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262 {
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263 if (!thr->dev->openacc.async.serialize_func (aq1, aq2))
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264 gomp_fatal ("ordering of async ids %d and %d failed", async1, async2);
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265 }
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266 else
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267 {
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268 /* TODO: Local thread synchronization.
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269 Necessary for the "async2 == acc_async_sync" case, or can just skip? */
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270 if (!thr->dev->openacc.async.synchronize_func (aq1))
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271 gomp_fatal ("wait on %d failed", async1);
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272 }
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273
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274 out_prof:
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275 if (profiling_p)
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276 {
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277 thr->prof_info = NULL;
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278 thr->api_info = NULL;
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279 }
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111
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280 }
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281
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282 void
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283 acc_wait_all (void)
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284 {
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285 struct goacc_thread *thr = goacc_thread ();
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286
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145
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287 acc_prof_info prof_info;
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288 acc_api_info api_info;
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289 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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111
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290
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145
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291 bool ret = true;
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292 gomp_mutex_lock (&thr->dev->openacc.async.lock);
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293 for (goacc_aq_list l = thr->dev->openacc.async.active; l; l = l->next)
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294 ret &= thr->dev->openacc.async.synchronize_func (l->aq);
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295 gomp_mutex_unlock (&thr->dev->openacc.async.lock);
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296
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297 if (profiling_p)
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298 {
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299 thr->prof_info = NULL;
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300 thr->api_info = NULL;
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301 }
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302
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303 if (!ret)
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304 gomp_fatal ("wait all failed");
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111
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305 }
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306
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307 /* acc_async_wait_all is an OpenACC 1.0 compatibility name for acc_wait_all. */
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308 #ifdef HAVE_ATTRIBUTE_ALIAS
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309 strong_alias (acc_wait_all, acc_async_wait_all)
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310 #else
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311 void
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312 acc_async_wait_all (void)
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313 {
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314 acc_wait_all ();
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315 }
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316 #endif
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317
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318 void
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319 acc_wait_all_async (int async)
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320 {
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145
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321 struct goacc_thread *thr = get_goacc_thread ();
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322
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323 acc_prof_info prof_info;
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324 acc_api_info api_info;
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325 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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326 if (profiling_p)
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327 {
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328 prof_info.async = async;
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329 prof_info.async_queue = prof_info.async;
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330 }
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331
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332 goacc_aq waiting_queue = lookup_goacc_asyncqueue (thr, true, async);
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333
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334 bool ret = true;
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335 gomp_mutex_lock (&thr->dev->openacc.async.lock);
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336 for (goacc_aq_list l = thr->dev->openacc.async.active; l; l = l->next)
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337 {
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338 if (waiting_queue)
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339 ret &= thr->dev->openacc.async.serialize_func (l->aq, waiting_queue);
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340 else
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341 /* TODO: Local thread synchronization.
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342 Necessary for the "async2 == acc_async_sync" case, or can just skip? */
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343 ret &= thr->dev->openacc.async.synchronize_func (l->aq);
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344 }
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345 gomp_mutex_unlock (&thr->dev->openacc.async.lock);
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346
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347 if (profiling_p)
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348 {
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349 thr->prof_info = NULL;
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350 thr->api_info = NULL;
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351 }
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352
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353 if (!ret)
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354 gomp_fatal ("wait all async(%d) failed", async);
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355 }
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356
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357 void
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358 GOACC_wait (int async, int num_waits, ...)
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359 {
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360 goacc_lazy_initialize ();
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111
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361
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362 struct goacc_thread *thr = goacc_thread ();
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363
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145
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364 /* No nesting. */
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365 assert (thr->prof_info == NULL);
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366 assert (thr->api_info == NULL);
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367 acc_prof_info prof_info;
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368 acc_api_info api_info;
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369 bool profiling_p = GOACC_PROFILING_SETUP_P (thr, &prof_info, &api_info);
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370 if (profiling_p)
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371 {
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372 prof_info.async = async;
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373 prof_info.async_queue = prof_info.async;
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374 }
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375
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376 if (num_waits)
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377 {
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378 va_list ap;
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379
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380 va_start (ap, num_waits);
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381 goacc_wait (async, num_waits, &ap);
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382 va_end (ap);
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383 }
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384 else if (async == acc_async_sync)
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385 acc_wait_all ();
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386 else
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387 acc_wait_all_async (async);
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388
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389 if (profiling_p)
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390 {
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391 thr->prof_info = NULL;
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392 thr->api_info = NULL;
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393 }
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394 }
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395
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396 attribute_hidden void
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397 goacc_wait (int async, int num_waits, va_list *ap)
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398 {
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399 while (num_waits--)
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400 {
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401 int qid = va_arg (*ap, int);
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402
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403 /* Waiting on ACC_ASYNC_NOVAL maps to 'wait all'. */
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404 if (qid == acc_async_noval)
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405 {
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406 if (async == acc_async_sync)
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407 acc_wait_all ();
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408 else
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409 acc_wait_all_async (async);
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410 break;
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411 }
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412
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413 if (acc_async_test (qid))
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414 continue;
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111
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415
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145
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416 if (async == acc_async_sync)
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417 acc_wait (qid);
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418 else if (qid == async)
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419 /* If we're waiting on the same asynchronous queue as we're
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420 launching on, the queue itself will order work as
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421 required, so there's no need to wait explicitly. */
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422 ;
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423 else
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424 acc_wait_async (qid, async);
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425 }
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426 }
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427
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428 attribute_hidden void
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429 goacc_async_free (struct gomp_device_descr *devicep,
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430 struct goacc_asyncqueue *aq, void *ptr)
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431 {
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432 if (!aq)
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433 free (ptr);
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434 else
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435 devicep->openacc.async.queue_callback_func (aq, free, ptr);
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111
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436 }
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145
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437
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438 /* This function initializes the asyncqueues for the device specified by
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439 DEVICEP. TODO DEVICEP must be locked on entry, and remains locked on
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440 return. */
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441
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442 attribute_hidden void
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443 goacc_init_asyncqueues (struct gomp_device_descr *devicep)
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444 {
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445 devicep->openacc.async.nasyncqueue = 0;
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446 devicep->openacc.async.asyncqueue = NULL;
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447 devicep->openacc.async.active = NULL;
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448 gomp_mutex_init (&devicep->openacc.async.lock);
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449 }
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450
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451 /* This function finalizes the asyncqueues for the device specified by DEVICEP.
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452 TODO DEVICEP must be locked on entry, and remains locked on return. */
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453
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454 attribute_hidden bool
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455 goacc_fini_asyncqueues (struct gomp_device_descr *devicep)
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|
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456 {
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|
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457 bool ret = true;
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458 gomp_mutex_lock (&devicep->openacc.async.lock);
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459 if (devicep->openacc.async.nasyncqueue > 0)
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|
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460 {
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|
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461 goacc_aq_list next;
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462 for (goacc_aq_list l = devicep->openacc.async.active; l; l = next)
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|
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463 {
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464 ret &= devicep->openacc.async.destruct_func (l->aq);
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465 next = l->next;
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|
466 free (l);
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|
|
467 }
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|
|
468 free (devicep->openacc.async.asyncqueue);
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|
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469 devicep->openacc.async.nasyncqueue = 0;
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470 devicep->openacc.async.asyncqueue = NULL;
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|
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471 devicep->openacc.async.active = NULL;
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|
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472 }
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|
473 gomp_mutex_unlock (&devicep->openacc.async.lock);
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|
|
474 gomp_mutex_destroy (&devicep->openacc.async.lock);
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|
|
475 return ret;
|
|
|
476 }
|
