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1 /* Copyright libuv project contributors. All rights reserved.
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2 *
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3 * Permission is hereby granted, free of charge, to any person obtaining a copy
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4 * of this software and associated documentation files (the "Software"), to
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5 * deal in the Software without restriction, including without limitation the
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6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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7 * sell copies of the Software, and to permit persons to whom the Software is
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8 * furnished to do so, subject to the following conditions:
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9 *
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10 * The above copyright notice and this permission notice shall be included in
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11 * all copies or substantial portions of the Software.
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12 *
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13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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19 * IN THE SOFTWARE.
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20 */
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21
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22 #include "uv.h"
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23 #include "task.h"
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24
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25 #include <string.h>
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26
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27 #ifndef NO_CPU_AFFINITY
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28
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29 static void check_affinity(void* arg) {
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30 int r;
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31 char* cpumask;
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32 int cpumasksize;
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33 uv_thread_t tid;
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34
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35 cpumask = (char*)arg;
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36 cpumasksize = uv_cpumask_size();
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37 ASSERT_GT(cpumasksize, 0);
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38 tid = uv_thread_self();
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39 r = uv_thread_setaffinity(&tid, cpumask, NULL, cpumasksize);
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40 ASSERT_OK(r);
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41 r = uv_thread_setaffinity(&tid, cpumask + cpumasksize, cpumask, cpumasksize);
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42 ASSERT_OK(r);
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43 }
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44
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45
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46 TEST_IMPL(thread_affinity) {
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47 int t1first;
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48 int t1second;
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49 int t2first;
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50 int t2second;
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51 int cpumasksize;
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52 char* cpumask;
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53 int ncpus;
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54 int r;
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55 int c;
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56 int i;
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57 uv_thread_t threads[3];
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58
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59 #ifdef _WIN32
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60 /* uv_thread_self isn't defined for the main thread on Windows */
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61 threads[0] = GetCurrentThread();
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62 #else
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63 threads[0] = uv_thread_self();
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64 #endif
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65 cpumasksize = uv_cpumask_size();
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66 ASSERT_GT(cpumasksize, 0);
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67
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68 cpumask = calloc(4 * cpumasksize, 1);
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69 ASSERT(cpumask);
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70
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71 r = uv_thread_getaffinity(&threads[0], cpumask, cpumasksize);
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72 ASSERT_OK(r);
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73 ASSERT(cpumask[0] && "test must be run with cpu 0 affinity");
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74 ncpus = 0;
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75 while (cpumask[++ncpus]) { }
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76 memset(cpumask, 0, 4 * cpumasksize);
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77
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78 t1first = cpumasksize * 0;
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79 t1second = cpumasksize * 1;
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80 t2first = cpumasksize * 2;
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81 t2second = cpumasksize * 3;
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82
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83 cpumask[t1second + 0] = 1;
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84 cpumask[t2first + 0] = 1;
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85 cpumask[t1first + (ncpus >= 2)] = 1;
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86 cpumask[t2second + (ncpus >= 2)] = 1;
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87 #ifdef __linux__
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88 cpumask[t1second + 2] = 1;
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89 cpumask[t2first + 2] = 1;
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90 cpumask[t1first + 3] = 1;
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91 cpumask[t2second + 3] = 1;
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92 #else
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93 if (ncpus >= 3) {
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94 cpumask[t1second + 2] = 1;
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95 cpumask[t2first + 2] = 1;
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96 }
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97 if (ncpus >= 4) {
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98 cpumask[t1first + 3] = 1;
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99 cpumask[t2second + 3] = 1;
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100 }
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101 #endif
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102
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103 ASSERT_OK(uv_thread_create(threads + 1,
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104 check_affinity,
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105 &cpumask[t1first]));
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106 ASSERT_OK(uv_thread_create(threads + 2,
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107 check_affinity,
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108 &cpumask[t2first]));
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109 ASSERT_OK(uv_thread_join(threads + 1));
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110 ASSERT_OK(uv_thread_join(threads + 2));
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111
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112 ASSERT(cpumask[t1first + 0] == (ncpus == 1));
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113 ASSERT(cpumask[t1first + 1] == (ncpus >= 2));
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114 ASSERT_OK(cpumask[t1first + 2]);
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115 ASSERT(cpumask[t1first + 3] == (ncpus >= 4));
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116
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117 ASSERT_EQ(1, cpumask[t2first + 0]);
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118 ASSERT_OK(cpumask[t2first + 1]);
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119 ASSERT(cpumask[t2first + 2] == (ncpus >= 3));
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120 ASSERT_OK(cpumask[t2first + 3]);
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121
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122 c = uv_thread_getcpu();
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123 ASSERT_GE(c, 0);
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124
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125 memset(cpumask, 0, cpumasksize);
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126 cpumask[c] = 1;
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127 r = uv_thread_setaffinity(&threads[0], cpumask, NULL, cpumasksize);
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128 ASSERT_OK(r);
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129
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130 memset(cpumask, 0, cpumasksize);
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131 r = uv_thread_getaffinity(&threads[0], cpumask, cpumasksize);
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132 ASSERT_OK(r);
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133 for (i = 0; i < cpumasksize; i++) {
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134 if (i == c)
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135 ASSERT_EQ(1, cpumask[i]);
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136 else
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137 ASSERT_OK(cpumask[i]);
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138 }
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139
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140 free(cpumask);
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141
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142 return 0;
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143 }
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144
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145 #else
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146
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147 TEST_IMPL(thread_affinity) {
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148 int cpumasksize;
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149 cpumasksize = uv_cpumask_size();
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150 ASSERT_EQ(cpumasksize, UV_ENOTSUP);
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151 return 0;
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152 }
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153
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154 #endif
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