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160
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1 /* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
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2 * Permission is hereby granted, free of charge, to any person obtaining a copy
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3 * of this software and associated documentation files (the "Software"), to
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4 * deal in the Software without restriction, including without limitation the
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5 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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6 * sell copies of the Software, and to permit persons to whom the Software is
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7 * furnished to do so, subject to the following conditions:
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8 *
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9 * The above copyright notice and this permission notice shall be included in
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10 * all copies or substantial portions of the Software.
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11 *
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12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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14 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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15 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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16 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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17 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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18 * IN THE SOFTWARE.
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19 */
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20
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21 #include "uv.h"
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22 #include "internal.h"
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23
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24 #include <sys/types.h>
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25 #include <sys/param.h>
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26 #include <sys/resource.h>
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27 #include <sys/sched.h>
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28 #include <sys/time.h>
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29 #include <sys/sysctl.h>
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30
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31 #include <errno.h>
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32 #include <fcntl.h>
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33 #include <paths.h>
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34 #include <stdlib.h>
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35 #include <string.h>
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36 #include <unistd.h>
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37
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38
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39 int uv__platform_loop_init(uv_loop_t* loop) {
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40 return uv__kqueue_init(loop);
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41 }
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42
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43
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44 void uv__platform_loop_delete(uv_loop_t* loop) {
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45 }
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46
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47
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48 void uv_loadavg(double avg[3]) {
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49 struct loadavg info;
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50 size_t size = sizeof(info);
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51 int which[] = {CTL_VM, VM_LOADAVG};
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52
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53 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0) < 0) return;
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54
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55 avg[0] = (double) info.ldavg[0] / info.fscale;
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56 avg[1] = (double) info.ldavg[1] / info.fscale;
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57 avg[2] = (double) info.ldavg[2] / info.fscale;
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58 }
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59
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60
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61 int uv_exepath(char* buffer, size_t* size) {
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62 int mib[4];
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63 char **argsbuf = NULL;
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64 size_t argsbuf_size = 100U;
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65 size_t exepath_size;
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66 pid_t mypid;
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67 int err;
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68
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69 if (buffer == NULL || size == NULL || *size == 0)
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70 return UV_EINVAL;
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71
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72 mypid = getpid();
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73 for (;;) {
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74 err = UV_ENOMEM;
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75 argsbuf = uv__reallocf(argsbuf, argsbuf_size);
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76 if (argsbuf == NULL)
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77 goto out;
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78 mib[0] = CTL_KERN;
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79 mib[1] = KERN_PROC_ARGS;
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80 mib[2] = mypid;
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81 mib[3] = KERN_PROC_ARGV;
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82 if (sysctl(mib, ARRAY_SIZE(mib), argsbuf, &argsbuf_size, NULL, 0) == 0) {
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83 break;
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84 }
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85 if (errno != ENOMEM) {
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86 err = UV__ERR(errno);
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87 goto out;
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88 }
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89 argsbuf_size *= 2U;
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90 }
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91
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92 if (argsbuf[0] == NULL) {
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93 err = UV_EINVAL; /* FIXME(bnoordhuis) More appropriate error. */
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94 goto out;
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95 }
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96
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97 *size -= 1;
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98 exepath_size = strlen(argsbuf[0]);
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99 if (*size > exepath_size)
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100 *size = exepath_size;
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101
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102 memcpy(buffer, argsbuf[0], *size);
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103 buffer[*size] = '\0';
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104 err = 0;
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105
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106 out:
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107 uv__free(argsbuf);
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108
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109 return err;
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110 }
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111
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112
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113 uint64_t uv_get_free_memory(void) {
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114 struct uvmexp info;
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115 size_t size = sizeof(info);
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116 int which[] = {CTL_VM, VM_UVMEXP};
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117
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118 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
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119 return 0;
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120
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121 return (uint64_t) info.free * sysconf(_SC_PAGESIZE);
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122 }
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123
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124
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125 uint64_t uv_get_total_memory(void) {
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126 uint64_t info;
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127 int which[] = {CTL_HW, HW_PHYSMEM64};
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128 size_t size = sizeof(info);
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129
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130 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
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131 return 0;
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132
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133 return (uint64_t) info;
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134 }
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135
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136
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137 uint64_t uv_get_constrained_memory(void) {
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138 return 0; /* Memory constraints are unknown. */
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139 }
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140
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141
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142 uint64_t uv_get_available_memory(void) {
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143 return uv_get_free_memory();
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144 }
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145
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146
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147 int uv_resident_set_memory(size_t* rss) {
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148 struct kinfo_proc kinfo;
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149 size_t page_size = getpagesize();
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150 size_t size = sizeof(struct kinfo_proc);
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151 int mib[6];
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152
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153 mib[0] = CTL_KERN;
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154 mib[1] = KERN_PROC;
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155 mib[2] = KERN_PROC_PID;
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156 mib[3] = getpid();
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157 mib[4] = sizeof(struct kinfo_proc);
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158 mib[5] = 1;
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159
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160 if (sysctl(mib, ARRAY_SIZE(mib), &kinfo, &size, NULL, 0) < 0)
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161 return UV__ERR(errno);
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162
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163 *rss = kinfo.p_vm_rssize * page_size;
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164 return 0;
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165 }
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166
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167
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168 int uv_uptime(double* uptime) {
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169 time_t now;
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170 struct timeval info;
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171 size_t size = sizeof(info);
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172 static int which[] = {CTL_KERN, KERN_BOOTTIME};
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173
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174 if (sysctl(which, ARRAY_SIZE(which), &info, &size, NULL, 0))
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175 return UV__ERR(errno);
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176
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177 now = time(NULL);
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178
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179 *uptime = (double)(now - info.tv_sec);
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180 return 0;
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181 }
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182
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183
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184 int uv_cpu_info(uv_cpu_info_t** cpu_infos, int* count) {
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185 unsigned int ticks = (unsigned int)sysconf(_SC_CLK_TCK),
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186 multiplier = ((uint64_t)1000L / ticks), cpuspeed;
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187 uint64_t info[CPUSTATES];
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188 char model[512];
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189 int numcpus = 1;
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190 int which[] = {CTL_HW,HW_MODEL};
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191 int percpu[] = {CTL_KERN,KERN_CPTIME2,0};
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192 size_t size;
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193 int i, j;
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194 uv_cpu_info_t* cpu_info;
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195
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196 size = sizeof(model);
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197 if (sysctl(which, ARRAY_SIZE(which), &model, &size, NULL, 0))
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198 return UV__ERR(errno);
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199
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200 which[1] = HW_NCPUONLINE;
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201 size = sizeof(numcpus);
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202 if (sysctl(which, ARRAY_SIZE(which), &numcpus, &size, NULL, 0))
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203 return UV__ERR(errno);
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204
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205 *cpu_infos = uv__malloc(numcpus * sizeof(**cpu_infos));
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206 if (!(*cpu_infos))
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207 return UV_ENOMEM;
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208
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209 i = 0;
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210 *count = numcpus;
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211
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212 which[1] = HW_CPUSPEED;
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213 size = sizeof(cpuspeed);
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214 cpuspeed = 0;
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215 /*
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216 * HW_CPUSPEED can return EOPNOTSUPP if cpuspeed is 0,
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217 * so ignore that and continue the flow, because we
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218 * still care about the rest of the CPU info.
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219 */
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220 if (sysctl(which, ARRAY_SIZE(which), &cpuspeed, &size, NULL, 0) &&
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221 (errno != EOPNOTSUPP)) {
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222 goto error;
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223 }
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224
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225 size = sizeof(info);
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226 for (i = 0; i < numcpus; i++) {
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227 percpu[2] = i;
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228 if (sysctl(percpu, ARRAY_SIZE(percpu), &info, &size, NULL, 0))
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229 goto error;
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230
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231 cpu_info = &(*cpu_infos)[i];
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232
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233 cpu_info->cpu_times.user = (uint64_t)(info[CP_USER]) * multiplier;
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234 cpu_info->cpu_times.nice = (uint64_t)(info[CP_NICE]) * multiplier;
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235 cpu_info->cpu_times.sys = (uint64_t)(info[CP_SYS]) * multiplier;
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236 cpu_info->cpu_times.idle = (uint64_t)(info[CP_IDLE]) * multiplier;
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237 cpu_info->cpu_times.irq = (uint64_t)(info[CP_INTR]) * multiplier;
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238
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239 cpu_info->model = uv__strdup(model);
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240 cpu_info->speed = cpuspeed;
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241 }
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242
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243 return 0;
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244
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245 error:
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246 *count = 0;
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247 for (j = 0; j < i; j++)
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248 uv__free((*cpu_infos)[j].model);
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249
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250 uv__free(*cpu_infos);
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251 *cpu_infos = NULL;
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252 return UV__ERR(errno);
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253 }
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