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0
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1 /* Get the system load averages.
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16
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2 Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995
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84
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3 Free Software Foundation, Inc.
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4
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5 This file is part of XEmacs.
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0
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6
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84
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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0
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11
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84
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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0
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16
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84
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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231
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22 #ifndef __CYGWIN32__
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0
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23
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24 /* Compile-time symbols that this file uses:
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25
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26 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
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27 KERNEL_FILE Pathname of the kernel to nlist.
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28 LDAV_CVT() Scale the load average from the kernel.
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29 Returns a double.
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30 LDAV_SYMBOL Name of kernel symbol giving load average.
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31 LOAD_AVE_TYPE Type of the load average array in the kernel.
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32 Must be defined unless one of
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33 apollo, DGUX, NeXT, or UMAX is defined;
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34 otherwise, no load average is available.
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35 NLIST_STRUCT Include nlist.h, not a.out.h, and
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36 the nlist n_name element is a pointer,
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37 not an array.
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38 NLIST_NAME_UNION struct nlist has an n_un member, not n_name.
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39 LINUX_LDAV_FILE [__linux__]: File containing load averages.
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40
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41 Specific system predefines this file uses, aside from setting
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42 default values if not emacs:
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43
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44 apollo
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45 BSD Real BSD, not just BSD-like.
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46 convex
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47 DGUX
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48 hpux
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49 MSDOS No-op for MSDOS.
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50 NeXT
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51 sgi
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52 sequent Sequent Dynix 3.x.x (BSD)
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53 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
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54 sony_news NEWS-OS (works at least for 4.1C)
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55 UMAX
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56 UMAX4_3
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57 WIN32 No-op for Windows95/NT.
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58 __linux__ Linux: assumes /proc filesystem mounted.
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59 Support from Michael K. Johnson.
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60 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
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61
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62 In addition, to avoid nesting many #ifdefs, we internally set
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63 LDAV_DONE to indicate that the load average has been computed.
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64
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65 We also #define LDAV_PRIVILEGED if a program will require
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66 special installation to be able to call getloadavg. */
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67
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68 /* This should always be first. */
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69 #ifdef HAVE_CONFIG_H
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70 #include <config.h>
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71 #endif
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72
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73 #include <sys/types.h>
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74
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75 /* Both the Emacs and non-Emacs sections want this. Some
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76 configuration files' definitions for the LOAD_AVE_CVT macro (like
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77 sparc.h's) use macros like FSCALE, defined here. */
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78 #ifdef unix
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79 #include <sys/param.h>
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80 #endif
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81
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48
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82 #ifdef XEMACS
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0
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83 #include "lisp.h" /* for encapsulated open, close, read, write */
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48
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84 #endif /* XEMACS */
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0
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85
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86 /* Exclude all the code except the test program at the end
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87 if the system has its own `getloadavg' function.
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88
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89 The declaration of `errno' is needed by the test program
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90 as well as the function itself, so it comes first. */
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91
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92 #include <errno.h>
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93
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94 #ifndef errno
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95 extern int errno;
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96 #endif
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97
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98 #ifndef HAVE_GETLOADAVG
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99
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100 /* The existing Emacs configuration files define a macro called
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101 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
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102 returns the load average multiplied by 100. What we actually want
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103 is a macro called LDAV_CVT, which returns the load average as an
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104 unmultiplied double.
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105
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106 For backwards compatibility, we'll define LDAV_CVT in terms of
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107 LOAD_AVE_CVT, but future machine config files should just define
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108 LDAV_CVT directly. */
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109
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110 #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
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111 #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
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112 #endif
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113
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48
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114 #ifdef XEMACS
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115 #if defined (HAVE_KSTAT_H)
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116 #include <kstat.h>
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117 #endif /* HAVE_KSTAT_H */
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118 #endif /* XEMACS */
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119
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0
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120 #if !defined (BSD) && defined (ultrix)
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121 /* Ultrix behaves like BSD on Vaxen. */
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122 #define BSD
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123 #endif
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124
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125 #ifdef NeXT
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126 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
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127 conflicts with the definition understood in this file, that this
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128 really is BSD. */
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129 #undef BSD
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130
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131 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
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132 defined to mean that the nlist method should be used, which is not true. */
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133 #undef FSCALE
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134 #endif
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135
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136 /* Set values that are different from the defaults, which are
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137 set a little farther down with #ifndef. */
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138
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139
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140 /* Some shorthands. */
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141
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142 #if defined (HPUX) && !defined (hpux)
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143 #define hpux
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144 #endif
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145
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146 #if defined(hp300) && !defined(hpux)
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147 #define MORE_BSD
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148 #endif
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149
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150 #if defined(ultrix) && defined(mips)
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151 #define decstation
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152 #endif
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153
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48
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154 #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
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0
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155 #define SUNOS_5
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156 #endif
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157
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158 #if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
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159 #define OSF_ALPHA
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151
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160 #include <netdb.h>
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161 #include <netinet/in.h> /* Needed for Digital UNIX V3 */
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162 #include <net/proto_net.h>
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0
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163 #include <sys/table.h>
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164 #endif
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165
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166 #if defined (__osf__) && (defined (mips) || defined (__mips__))
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167 #define OSF_MIPS
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168 #include <sys/table.h>
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169 #endif
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170
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171 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
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172 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
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173 that with a couple of other things and we'll have a unique match. */
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174 #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
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175 #define tek4300 /* Define by emacs, but not by other users. */
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176 #endif
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177
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178
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179 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
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180 #ifndef LOAD_AVE_TYPE
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181
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182 #ifdef MORE_BSD
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183 #define LOAD_AVE_TYPE long
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184 #endif
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185
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186 #ifdef sun
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187 #define LOAD_AVE_TYPE long
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188 #endif
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189
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190 #ifdef decstation
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191 #define LOAD_AVE_TYPE long
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192 #endif
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193
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194 #ifdef _SEQUENT_
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195 #define LOAD_AVE_TYPE long
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196 #endif
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197
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198 #ifdef sgi
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199 #define LOAD_AVE_TYPE long
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200 #endif
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201
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202 #ifdef SVR4
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203 #define LOAD_AVE_TYPE long
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204 #endif
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205
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206 #ifdef sony_news
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207 #define LOAD_AVE_TYPE long
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208 #endif
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209
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210 #ifdef sequent
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211 #define LOAD_AVE_TYPE long
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212 #endif
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213
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214 #ifdef OSF_ALPHA
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215 #define LOAD_AVE_TYPE long
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216 #endif
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217
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218 #if defined (ardent) && defined (titan)
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219 #define LOAD_AVE_TYPE long
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220 #endif
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221
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222 #ifdef tek4300
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223 #define LOAD_AVE_TYPE long
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224 #endif
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225
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226 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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227 #define LOAD_AVE_TYPE long
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228 #endif
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229
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230 #ifdef _AIX
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231 #define LOAD_AVE_TYPE long
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232 #endif
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233
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234 #ifdef convex
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235 #define LOAD_AVE_TYPE double
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236 #ifndef LDAV_CVT
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237 #define LDAV_CVT(n) (n)
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238 #endif
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239 #endif
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240
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241 #endif /* No LOAD_AVE_TYPE. */
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242
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243 #ifdef OSF_ALPHA
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244 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
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245 according to ghazi@noc.rutgers.edu. */
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246 #undef FSCALE
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247 #define FSCALE 1024.0
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248 #endif
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249
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250 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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251 /* <sys/param.h> defines an incorrect value for FSCALE on an
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252 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
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253 #undef FSCALE
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254 #define FSCALE 100.0
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255 #endif
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256
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257
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258 #ifndef FSCALE
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259
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260 /* SunOS and some others define FSCALE in sys/param.h. */
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261
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262 #ifdef MORE_BSD
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263 #define FSCALE 2048.0
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264 #endif
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265
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266 #if defined(MIPS) || defined(SVR4) || defined(decstation)
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267 #define FSCALE 256
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268 #endif
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269
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270 #if defined (sgi) || defined (sequent)
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271 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
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272 above under #ifdef MIPS. But we want the sgi value. */
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273 #undef FSCALE
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274 #define FSCALE 1000.0
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275 #endif
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276
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277 #if defined (ardent) && defined (titan)
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278 #define FSCALE 65536.0
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279 #endif
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280
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281 #ifdef tek4300
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282 #define FSCALE 100.0
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283 #endif
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284
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285 #ifdef _AIX
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286 #define FSCALE 65536.0
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287 #endif
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288
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289 #endif /* Not FSCALE. */
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290
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291 #if !defined (LDAV_CVT) && defined (FSCALE)
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292 #define LDAV_CVT(n) (((double) (n)) / FSCALE)
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293 #endif
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294
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295 /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
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296 #ifndef NLIST_STRUCT
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297
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298 #ifdef MORE_BSD
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299 #define NLIST_STRUCT
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300 #endif
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301
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302 #ifdef sun
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303 #define NLIST_STRUCT
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304 #endif
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305
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306 #ifdef decstation
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307 #define NLIST_STRUCT
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308 #endif
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309
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310 #ifdef hpux
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311 #define NLIST_STRUCT
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312 #endif
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313
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314 #if defined (_SEQUENT_) || defined (sequent)
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315 #define NLIST_STRUCT
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316 #endif
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317
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318 #ifdef sgi
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319 #define NLIST_STRUCT
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320 #endif
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321
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322 #ifdef SVR4
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323 #define NLIST_STRUCT
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324 #endif
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325
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326 #ifdef sony_news
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327 #define NLIST_STRUCT
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328 #endif
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329
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330 #ifdef OSF_ALPHA
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331 #define NLIST_STRUCT
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332 #endif
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333
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334 #if defined (ardent) && defined (titan)
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335 #define NLIST_STRUCT
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336 #endif
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337
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338 #ifdef tek4300
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339 #define NLIST_STRUCT
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340 #endif
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341
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342 #ifdef butterfly
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343 #define NLIST_STRUCT
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344 #endif
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345
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346 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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347 #define NLIST_STRUCT
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348 #endif
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349
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350 #ifdef _AIX
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351 #define NLIST_STRUCT
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352 #endif
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353
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354 #endif /* defined (NLIST_STRUCT) */
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355
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356
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357 #if defined(sgi) || (defined(mips) && !defined(BSD))
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358 #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
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359 #endif
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360
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361
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362 #if !defined (KERNEL_FILE) && defined (sequent)
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363 #define KERNEL_FILE "/dynix"
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364 #endif
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365
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366 #if !defined (KERNEL_FILE) && defined (hpux)
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367 #define KERNEL_FILE "/hp-ux"
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368 #endif
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369
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370 #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
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371 #define KERNEL_FILE "/unix"
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372 #endif
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373
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374
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375 #if !defined (LDAV_SYMBOL) && defined (alliant)
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376 #define LDAV_SYMBOL "_Loadavg"
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377 #endif
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378
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379 #if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)) || defined (_AIX))
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380 #define LDAV_SYMBOL "avenrun"
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381 #endif
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382
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48
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383 #ifdef HAVE_UNISTD_H
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0
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384 #include <unistd.h>
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48
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385 #endif
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0
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386
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387 #include <stdio.h>
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388
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389 /* LOAD_AVE_TYPE should only get defined if we're going to use the
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390 nlist method. */
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391 #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
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392 #define LOAD_AVE_TYPE double
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393 #endif
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394
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395 #ifdef LOAD_AVE_TYPE
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396
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397 #ifndef NLIST_STRUCT
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398 #include <a.out.h>
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399 #else /* NLIST_STRUCT */
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400 #include <nlist.h>
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401 #endif /* NLIST_STRUCT */
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402
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403 #ifdef SUNOS_5
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404 #include <fcntl.h>
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405 #include <kvm.h>
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406 #endif
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407
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408 #ifndef KERNEL_FILE
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409 #define KERNEL_FILE "/vmunix"
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410 #endif /* KERNEL_FILE */
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411
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412 #ifndef LDAV_SYMBOL
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413 #define LDAV_SYMBOL "_avenrun"
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414 #endif /* LDAV_SYMBOL */
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415
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416 #ifndef LDAV_CVT
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417 #define LDAV_CVT(n) ((double) (n))
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418 #endif /* !LDAV_CVT */
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419
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420 #endif /* LOAD_AVE_TYPE */
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421
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422 #ifdef NeXT
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423 #ifdef HAVE_MACH_MACH_H
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|
424 #include <mach/mach.h>
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|
|
425 #else
|
|
|
426 #include <mach.h>
|
|
|
427 #endif
|
|
|
428 #endif /* NeXT */
|
|
|
429
|
|
|
430 #ifdef sgi
|
|
|
431 #include <sys/sysmp.h>
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|
|
432 #endif /* sgi */
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|
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433
|
|
|
434 #ifdef UMAX
|
|
|
435 #include <stdio.h>
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|
|
436 #include <signal.h>
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|
|
437 #include <sys/time.h>
|
|
|
438 #include <sys/wait.h>
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|
|
439 #include <sys/syscall.h>
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|
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440
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|
|
441 #ifdef UMAX_43
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|
442 #include <machine/cpu.h>
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|
443 #include <inq_stats/statistics.h>
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|
|
444 #include <inq_stats/sysstats.h>
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|
|
445 #include <inq_stats/cpustats.h>
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|
|
446 #include <inq_stats/procstats.h>
|
|
|
447 #else /* Not UMAX_43. */
|
|
|
448 #include <sys/sysdefs.h>
|
|
|
449 #include <sys/statistics.h>
|
|
|
450 #include <sys/sysstats.h>
|
|
|
451 #include <sys/cpudefs.h>
|
|
|
452 #include <sys/cpustats.h>
|
|
|
453 #include <sys/procstats.h>
|
|
|
454 #endif /* Not UMAX_43. */
|
|
|
455 #endif /* UMAX */
|
|
|
456
|
|
|
457 #ifdef DGUX
|
|
|
458 #include <sys/dg_sys_info.h>
|
|
|
459 #endif
|
|
|
460
|
|
48
|
461 #ifdef XEMACS
|
|
|
462 #if defined (HAVE_SYS_PSTAT_H)
|
|
0
|
463 #include <sys/pstat.h>
|
|
48
|
464 #endif /* HAVE_SYS_PSTAT_H (on HPUX) */
|
|
|
465 #endif /* XEMACS */
|
|
0
|
466
|
|
|
467 #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
|
|
|
468 #include <fcntl.h>
|
|
|
469 #else
|
|
|
470 #include <sys/file.h>
|
|
|
471 #endif
|
|
|
472
|
|
|
473 /* Avoid static vars inside a function since in HPUX they dump as pure. */
|
|
|
474
|
|
|
475 #ifdef NeXT
|
|
|
476 static processor_set_t default_set;
|
|
|
477 static int getloadavg_initialized;
|
|
|
478 #endif /* NeXT */
|
|
|
479
|
|
|
480 #ifdef UMAX
|
|
|
481 static unsigned int cpus = 0;
|
|
|
482 static unsigned int samples;
|
|
|
483 #endif /* UMAX */
|
|
|
484
|
|
|
485 #ifdef DGUX
|
|
|
486 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
|
|
|
487 #endif /* DGUX */
|
|
|
488
|
|
|
489 #ifdef LOAD_AVE_TYPE
|
|
209
|
490 /* File descriptor open to /dev/kmem */
|
|
0
|
491 static int channel;
|
|
|
492 /* Nonzero iff channel is valid. */
|
|
|
493 static int getloadavg_initialized;
|
|
|
494 /* Offset in kmem to seek to read load average, or 0 means invalid. */
|
|
|
495 static long offset;
|
|
|
496
|
|
209
|
497 #ifndef sgi
|
|
0
|
498 static struct nlist nl[2];
|
|
209
|
499 #endif /* not sgi */
|
|
0
|
500
|
|
|
501 #ifdef SUNOS_5
|
|
|
502 static kvm_t *kd;
|
|
|
503 #endif /* SUNOS_5 */
|
|
|
504
|
|
|
505 #endif /* LOAD_AVE_TYPE */
|
|
|
506
|
|
|
507 /* Put the 1 minute, 5 minute and 15 minute load averages
|
|
|
508 into the first NELEM elements of LOADAVG.
|
|
|
509 Return the number written (never more than 3, but may be less than NELEM),
|
|
|
510 or -1 if an error occurred. */
|
|
|
511
|
|
|
512 int
|
|
84
|
513 getloadavg (double loadavg[], int nelem)
|
|
0
|
514 {
|
|
|
515 int elem = 0; /* Return value. */
|
|
|
516
|
|
|
517 #ifdef NO_GET_LOAD_AVG
|
|
|
518 #define LDAV_DONE
|
|
|
519 /* Set errno to zero to indicate that there was no particular error;
|
|
|
520 this function just can't work at all on this system. */
|
|
|
521 errno = 0;
|
|
|
522 elem = -1;
|
|
|
523 #endif
|
|
|
524
|
|
48
|
525 #ifdef XEMACS
|
|
|
526 #if ! defined (LDAV_DONE) && defined (HAVE_KSTAT_H) && defined (HAVE_LIBKSTAT)
|
|
|
527 #define LDAV_DONE
|
|
185
|
528
|
|
48
|
529 /* getloadavg is best implemented using kstat (kernel stats),
|
|
|
530 on systems (like SunOS5) that support it,
|
|
|
531 since you don't have to be superusers to use it.
|
|
|
532 Thanks to Zlatko Calusic <zcalusic@srce.hr>.
|
|
|
533 Integrated to XEmacs by Hrvoje Niksic <hniksic@srce.hr>. */
|
|
|
534 static kstat_ctl_t *kc;
|
|
|
535 static kstat_t *ksp;
|
|
|
536 static kstat_named_t *buf;
|
|
|
537
|
|
|
538 if (!getloadavg_initialized)
|
|
|
539 {
|
|
|
540 kc = kstat_open();
|
|
|
541 if (!kc)
|
|
|
542 return -1;
|
|
|
543 getloadavg_initialized = 1;
|
|
|
544 }
|
|
|
545 ksp = kstat_lookup(kc, "unix", 0, "system_misc");
|
|
|
546 if (!ksp)
|
|
|
547 return -1;
|
|
|
548 if (kstat_read(kc, ksp, ksp->ks_data) < 0)
|
|
|
549 return -1;
|
|
185
|
550 buf = (kstat_named_t *) malloc (ksp->ks_data_size);
|
|
48
|
551 if (!buf)
|
|
|
552 return -1;
|
|
|
553 memcpy(buf, ksp->ks_data, ksp->ks_data_size);
|
|
|
554 if (nelem > 3)
|
|
|
555 nelem = 3;
|
|
|
556 for (elem = 0; elem < nelem; elem++)
|
|
|
557 loadavg[elem] = (buf + 6 + elem)->value.ul / 256.0;
|
|
|
558 free(buf);
|
|
185
|
559
|
|
48
|
560 #endif /* HAVE_KSTAT_H && HAVE_LIBKSTAT */
|
|
82
|
561
|
|
|
562 #if !defined (LDAV_DONE) && defined (HAVE_SYS_PSTAT_H)
|
|
|
563 #define LDAV_DONE
|
|
|
564 /* This is totally undocumented, and is not guaranteed to work, but
|
|
|
565 mayhap it might .... If it does work, it will work only on HP-UX
|
|
|
566 8.0 or later. -- Darryl Okahata <darrylo@sr.hp.com> */
|
|
|
567 #undef LOAD_AVE_TYPE /* Make sure these don't exist. */
|
|
|
568 #undef LOAD_AVE_CVT
|
|
|
569 #undef LDAV_SYMBOL
|
|
|
570 struct pst_dynamic procinfo;
|
|
|
571 union pstun statbuf;
|
|
|
572
|
|
|
573 statbuf.pst_dynamic = &procinfo;
|
|
|
574 if (pstat (PSTAT_DYNAMIC, statbuf, sizeof (struct pst_dynamic), 0, 0) == -1)
|
|
|
575 return (-1);
|
|
|
576 loadavg[elem++] = procinfo.psd_avg_1_min;
|
|
|
577 loadavg[elem++] = procinfo.psd_avg_5_min;
|
|
|
578 loadavg[elem++] = procinfo.psd_avg_15_min;
|
|
|
579 #endif /* HPUX */
|
|
|
580
|
|
48
|
581 #endif /* XEMACS */
|
|
|
582
|
|
0
|
583 #if !defined (LDAV_DONE) && defined (__linux__)
|
|
|
584 #define LDAV_DONE
|
|
|
585 #undef LOAD_AVE_TYPE
|
|
|
586
|
|
|
587 #ifndef LINUX_LDAV_FILE
|
|
|
588 #define LINUX_LDAV_FILE "/proc/loadavg"
|
|
|
589 #endif
|
|
|
590
|
|
|
591 char ldavgbuf[40];
|
|
|
592 double load_ave[3];
|
|
|
593 int fd, count;
|
|
|
594
|
|
|
595 fd = open (LINUX_LDAV_FILE, O_RDONLY);
|
|
|
596 if (fd == -1)
|
|
|
597 return -1;
|
|
|
598 count = read (fd, ldavgbuf, 40);
|
|
|
599 (void) close (fd);
|
|
|
600 if (count <= 0)
|
|
|
601 return -1;
|
|
|
602
|
|
|
603 count = sscanf (ldavgbuf, "%lf %lf %lf",
|
|
|
604 &load_ave[0], &load_ave[1], &load_ave[2]);
|
|
|
605 if (count < 1)
|
|
|
606 return -1;
|
|
|
607
|
|
|
608 for (elem = 0; elem < nelem && elem < count; elem++)
|
|
|
609 loadavg[elem] = load_ave[elem];
|
|
|
610
|
|
|
611 return elem;
|
|
|
612
|
|
|
613 #endif /* __linux__ */
|
|
|
614
|
|
|
615 #if !defined (LDAV_DONE) && defined (__NetBSD__)
|
|
|
616 #define LDAV_DONE
|
|
|
617 #undef LOAD_AVE_TYPE
|
|
|
618
|
|
|
619 #ifndef NETBSD_LDAV_FILE
|
|
|
620 #define NETBSD_LDAV_FILE "/kern/loadavg"
|
|
|
621 #endif
|
|
|
622
|
|
|
623 unsigned long int load_ave[3], scale;
|
|
|
624 int count;
|
|
|
625 FILE *fp;
|
|
|
626
|
|
|
627 fp = fopen (NETBSD_LDAV_FILE, "r");
|
|
|
628 if (fp == NULL)
|
|
|
629 return -1;
|
|
|
630 count = fscanf (fp, "%lu %lu %lu %lu\n",
|
|
|
631 &load_ave[0], &load_ave[1], &load_ave[2],
|
|
|
632 &scale);
|
|
|
633 (void) fclose (fp);
|
|
|
634 if (count != 4)
|
|
|
635 return -1;
|
|
|
636
|
|
|
637 for (elem = 0; elem < nelem; elem++)
|
|
|
638 loadavg[elem] = (double) load_ave[elem] / (double) scale;
|
|
|
639
|
|
|
640 return elem;
|
|
|
641
|
|
|
642 #endif /* __NetBSD__ */
|
|
|
643
|
|
|
644 #if !defined (LDAV_DONE) && defined (NeXT)
|
|
|
645 #define LDAV_DONE
|
|
|
646 /* The NeXT code was adapted from iscreen 3.2. */
|
|
|
647
|
|
|
648 host_t host;
|
|
|
649 struct processor_set_basic_info info;
|
|
|
650 unsigned info_count;
|
|
|
651
|
|
48
|
652 /* We only know how to get the 1-minute average for this system,
|
|
|
653 so even if the caller asks for more than 1, we only return 1. */
|
|
0
|
654
|
|
|
655 if (!getloadavg_initialized)
|
|
|
656 {
|
|
|
657 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
|
|
|
658 getloadavg_initialized = 1;
|
|
|
659 }
|
|
|
660
|
|
|
661 if (getloadavg_initialized)
|
|
|
662 {
|
|
|
663 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
|
|
|
664 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
|
|
|
665 (processor_set_info_t) &info, &info_count)
|
|
|
666 != KERN_SUCCESS)
|
|
|
667 getloadavg_initialized = 0;
|
|
|
668 else
|
|
|
669 {
|
|
|
670 if (nelem > 0)
|
|
|
671 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
|
|
672 }
|
|
|
673 }
|
|
|
674
|
|
|
675 if (!getloadavg_initialized)
|
|
|
676 return -1;
|
|
|
677 #endif /* NeXT */
|
|
|
678
|
|
|
679 #if !defined (LDAV_DONE) && defined (UMAX)
|
|
|
680 #define LDAV_DONE
|
|
|
681 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
|
|
|
682 have a /dev/kmem. Information about the workings of the running kernel
|
|
|
683 can be gathered with inq_stats system calls.
|
|
|
684 We only know how to get the 1-minute average for this system. */
|
|
|
685
|
|
|
686 struct proc_summary proc_sum_data;
|
|
|
687 struct stat_descr proc_info;
|
|
|
688 double load;
|
|
203
|
689 REGISTER unsigned int i, j;
|
|
0
|
690
|
|
|
691 if (cpus == 0)
|
|
|
692 {
|
|
203
|
693 REGISTER unsigned int c, i;
|
|
0
|
694 struct cpu_config conf;
|
|
|
695 struct stat_descr desc;
|
|
|
696
|
|
|
697 desc.sd_next = 0;
|
|
|
698 desc.sd_subsys = SUBSYS_CPU;
|
|
|
699 desc.sd_type = CPUTYPE_CONFIG;
|
|
|
700 desc.sd_addr = (char *) &conf;
|
|
|
701 desc.sd_size = sizeof conf;
|
|
|
702
|
|
|
703 if (inq_stats (1, &desc))
|
|
|
704 return -1;
|
|
|
705
|
|
|
706 c = 0;
|
|
|
707 for (i = 0; i < conf.config_maxclass; ++i)
|
|
|
708 {
|
|
|
709 struct class_stats stats;
|
|
|
710 bzero ((char *) &stats, sizeof stats);
|
|
|
711
|
|
|
712 desc.sd_type = CPUTYPE_CLASS;
|
|
|
713 desc.sd_objid = i;
|
|
|
714 desc.sd_addr = (char *) &stats;
|
|
|
715 desc.sd_size = sizeof stats;
|
|
|
716
|
|
|
717 if (inq_stats (1, &desc))
|
|
|
718 return -1;
|
|
|
719
|
|
|
720 c += stats.class_numcpus;
|
|
|
721 }
|
|
|
722 cpus = c;
|
|
|
723 samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
|
|
724 }
|
|
|
725
|
|
|
726 proc_info.sd_next = 0;
|
|
|
727 proc_info.sd_subsys = SUBSYS_PROC;
|
|
|
728 proc_info.sd_type = PROCTYPE_SUMMARY;
|
|
|
729 proc_info.sd_addr = (char *) &proc_sum_data;
|
|
|
730 proc_info.sd_size = sizeof (struct proc_summary);
|
|
|
731 proc_info.sd_sizeused = 0;
|
|
|
732
|
|
|
733 if (inq_stats (1, &proc_info) != 0)
|
|
|
734 return -1;
|
|
|
735
|
|
|
736 load = proc_sum_data.ps_nrunnable;
|
|
|
737 j = 0;
|
|
|
738 for (i = samples - 1; i > 0; --i)
|
|
|
739 {
|
|
|
740 load += proc_sum_data.ps_nrun[j];
|
|
|
741 if (j++ == PS_NRUNSIZE)
|
|
|
742 j = 0;
|
|
|
743 }
|
|
|
744
|
|
|
745 if (nelem > 0)
|
|
|
746 loadavg[elem++] = load / samples / cpus;
|
|
|
747 #endif /* UMAX */
|
|
|
748
|
|
|
749 #if !defined (LDAV_DONE) && defined (DGUX)
|
|
|
750 #define LDAV_DONE
|
|
|
751 /* This call can return -1 for an error, but with good args
|
|
|
752 it's not supposed to fail. The first argument is for no
|
|
|
753 apparent reason of type `long int *'. */
|
|
|
754 dg_sys_info ((long int *) &load_info,
|
|
|
755 DG_SYS_INFO_LOAD_INFO_TYPE,
|
|
|
756 DG_SYS_INFO_LOAD_VERSION_0);
|
|
|
757
|
|
|
758 if (nelem > 0)
|
|
|
759 loadavg[elem++] = load_info.one_minute;
|
|
|
760 if (nelem > 1)
|
|
|
761 loadavg[elem++] = load_info.five_minute;
|
|
|
762 if (nelem > 2)
|
|
|
763 loadavg[elem++] = load_info.fifteen_minute;
|
|
|
764 #endif /* DGUX */
|
|
|
765
|
|
|
766 #if !defined (LDAV_DONE) && defined (apollo)
|
|
|
767 #define LDAV_DONE
|
|
|
768 /* Apollo code from lisch@mentorg.com (Ray Lischner).
|
|
|
769
|
|
|
770 This system call is not documented. The load average is obtained as
|
|
|
771 three long integers, for the load average over the past minute,
|
|
|
772 five minutes, and fifteen minutes. Each value is a scaled integer,
|
|
|
773 with 16 bits of integer part and 16 bits of fraction part.
|
|
|
774
|
|
|
775 I'm not sure which operating system first supported this system call,
|
|
|
776 but I know that SR10.2 supports it. */
|
|
|
777
|
|
|
778 extern void proc1_$get_loadav ();
|
|
|
779 unsigned long load_ave[3];
|
|
|
780
|
|
|
781 proc1_$get_loadav (load_ave);
|
|
|
782
|
|
|
783 if (nelem > 0)
|
|
|
784 loadavg[elem++] = load_ave[0] / 65536.0;
|
|
|
785 if (nelem > 1)
|
|
|
786 loadavg[elem++] = load_ave[1] / 65536.0;
|
|
|
787 if (nelem > 2)
|
|
|
788 loadavg[elem++] = load_ave[2] / 65536.0;
|
|
|
789 #endif /* apollo */
|
|
|
790
|
|
|
791 #if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
|
|
792 #define LDAV_DONE
|
|
|
793
|
|
|
794 struct tbl_loadavg load_ave;
|
|
|
795 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
48
|
796 loadavg[elem++]
|
|
|
797 = (load_ave.tl_lscale == 0
|
|
|
798 ? load_ave.tl_avenrun.d[0]
|
|
|
799 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
|
|
0
|
800 #endif /* OSF_MIPS */
|
|
|
801
|
|
|
802 #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32))
|
|
|
803 #define LDAV_DONE
|
|
|
804
|
|
|
805 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
806 for ( ; elem < nelem; elem++)
|
|
|
807 {
|
|
|
808 loadavg[elem] = 0.0;
|
|
|
809 }
|
|
|
810 #endif /* MSDOS */
|
|
|
811
|
|
|
812 #if !defined (LDAV_DONE) && defined (OSF_ALPHA)
|
|
|
813 #define LDAV_DONE
|
|
|
814
|
|
|
815 struct tbl_loadavg load_ave;
|
|
|
816 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
817 for (elem = 0; elem < nelem; elem++)
|
|
|
818 loadavg[elem]
|
|
|
819 = (load_ave.tl_lscale == 0
|
|
|
820 ? load_ave.tl_avenrun.d[elem]
|
|
|
821 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
|
|
|
822 #endif /* OSF_ALPHA */
|
|
|
823
|
|
209
|
824 #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE)
|
|
0
|
825
|
|
|
826 /* UNIX-specific code -- read the average from /dev/kmem. */
|
|
|
827
|
|
|
828 #define LDAV_PRIVILEGED /* This code requires special installation. */
|
|
|
829
|
|
|
830 LOAD_AVE_TYPE load_ave[3];
|
|
|
831
|
|
|
832 /* Get the address of LDAV_SYMBOL. */
|
|
|
833 if (offset == 0)
|
|
|
834 {
|
|
|
835 #ifndef sgi
|
|
|
836 #ifndef NLIST_STRUCT
|
|
|
837 strcpy (nl[0].n_name, LDAV_SYMBOL);
|
|
|
838 strcpy (nl[1].n_name, "");
|
|
|
839 #else /* NLIST_STRUCT */
|
|
|
840 #ifdef NLIST_NAME_UNION
|
|
|
841 nl[0].n_un.n_name = LDAV_SYMBOL;
|
|
|
842 nl[1].n_un.n_name = 0;
|
|
|
843 #else /* not NLIST_NAME_UNION */
|
|
84
|
844 nl[0].n_name = (char *) LDAV_SYMBOL;
|
|
0
|
845 nl[1].n_name = 0;
|
|
|
846 #endif /* not NLIST_NAME_UNION */
|
|
|
847 #endif /* NLIST_STRUCT */
|
|
|
848
|
|
|
849 #ifndef SUNOS_5
|
|
|
850 if (
|
|
|
851 #if !(defined (_AIX) && !defined (ps2))
|
|
|
852 nlist (KERNEL_FILE, nl)
|
|
|
853 #else /* _AIX */
|
|
|
854 knlist (nl, 1, sizeof (nl[0]))
|
|
|
855 #endif
|
|
|
856 >= 0)
|
|
|
857 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
|
|
858 {
|
|
|
859 #ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
|
|
860 FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
|
|
861 #endif
|
|
|
862 offset = nl[0].n_value;
|
|
|
863 }
|
|
|
864 #endif /* !SUNOS_5 */
|
|
|
865 #else /* sgi */
|
|
|
866 int ldav_off;
|
|
|
867
|
|
|
868 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
|
|
869 if (ldav_off != -1)
|
|
|
870 offset = (long) ldav_off & 0x7fffffff;
|
|
|
871 #endif /* sgi */
|
|
|
872 }
|
|
|
873
|
|
|
874 /* Make sure we have /dev/kmem open. */
|
|
|
875 if (!getloadavg_initialized)
|
|
|
876 {
|
|
|
877 #ifndef SUNOS_5
|
|
|
878 channel = open ("/dev/kmem", 0);
|
|
|
879 if (channel >= 0)
|
|
|
880 {
|
|
|
881 /* Set the channel to close on exec, so it does not
|
|
|
882 litter any child's descriptor table. */
|
|
|
883 #ifdef FD_SETFD
|
|
|
884 #ifndef FD_CLOEXEC
|
|
|
885 #define FD_CLOEXEC 1
|
|
|
886 #endif
|
|
|
887 (void) fcntl (channel, F_SETFD, FD_CLOEXEC);
|
|
|
888 #endif
|
|
|
889 getloadavg_initialized = 1;
|
|
|
890 }
|
|
|
891 #else /* SUNOS_5 */
|
|
|
892 /* We pass 0 for the kernel, corefile, and swapfile names
|
|
|
893 to use the currently running kernel. */
|
|
|
894 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
|
|
895 if (kd != 0)
|
|
|
896 {
|
|
|
897 /* nlist the currently running kernel. */
|
|
|
898 kvm_nlist (kd, nl);
|
|
|
899 offset = nl[0].n_value;
|
|
|
900 getloadavg_initialized = 1;
|
|
|
901 }
|
|
|
902 #endif /* SUNOS_5 */
|
|
|
903 }
|
|
|
904
|
|
|
905 /* If we can, get the load average values. */
|
|
|
906 if (offset && getloadavg_initialized)
|
|
|
907 {
|
|
|
908 /* Try to read the load. */
|
|
|
909 #ifndef SUNOS_5
|
|
|
910 if (lseek (channel, offset, 0) == -1L
|
|
|
911 || read (channel, (char *) load_ave, sizeof (load_ave))
|
|
|
912 != sizeof (load_ave))
|
|
|
913 {
|
|
|
914 close (channel);
|
|
|
915 getloadavg_initialized = 0;
|
|
|
916 }
|
|
|
917 #else /* SUNOS_5 */
|
|
|
918 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
|
|
919 != sizeof (load_ave))
|
|
|
920 {
|
|
|
921 kvm_close (kd);
|
|
|
922 getloadavg_initialized = 0;
|
|
|
923 }
|
|
|
924 #endif /* SUNOS_5 */
|
|
|
925 }
|
|
|
926
|
|
|
927 if (offset == 0 || !getloadavg_initialized)
|
|
|
928 return -1;
|
|
|
929
|
|
|
930 if (nelem > 0)
|
|
|
931 loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
|
|
932 if (nelem > 1)
|
|
|
933 loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
|
|
934 if (nelem > 2)
|
|
|
935 loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
|
|
936
|
|
|
937 #define LDAV_DONE
|
|
|
938 #endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
|
|
939
|
|
|
940 #ifdef LDAV_DONE
|
|
|
941 return elem;
|
|
|
942 #else
|
|
|
943 /* Set errno to zero to indicate that there was no particular error;
|
|
|
944 this function just can't work at all on this system. */
|
|
|
945 errno = 0;
|
|
|
946 return -1;
|
|
|
947 #endif
|
|
|
948 }
|
|
|
949
|
|
|
950 #endif /* ! HAVE_GETLOADAVG */
|
|
|
951
|
|
|
952 #ifdef TEST
|
|
|
953 void
|
|
84
|
954 main (int argc, char **argv)
|
|
0
|
955 {
|
|
|
956 int naptime = 0;
|
|
|
957
|
|
|
958 if (argc > 1)
|
|
|
959 naptime = atoi (argv[1]);
|
|
|
960
|
|
|
961 while (1)
|
|
|
962 {
|
|
|
963 double avg[3];
|
|
|
964 int loads;
|
|
|
965
|
|
|
966 errno = 0; /* Don't be misled if it doesn't set errno. */
|
|
|
967 loads = getloadavg (avg, 3);
|
|
|
968 if (loads == -1)
|
|
|
969 {
|
|
|
970 perror ("Error getting load average");
|
|
|
971 exit (1);
|
|
|
972 }
|
|
|
973 if (loads > 0)
|
|
|
974 printf ("1-minute: %f ", avg[0]);
|
|
|
975 if (loads > 1)
|
|
|
976 printf ("5-minute: %f ", avg[1]);
|
|
|
977 if (loads > 2)
|
|
|
978 printf ("15-minute: %f ", avg[2]);
|
|
|
979 if (loads > 0)
|
|
|
980 putchar ('\n');
|
|
|
981
|
|
|
982 if (naptime == 0)
|
|
|
983 break;
|
|
|
984 sleep (naptime);
|
|
|
985 }
|
|
|
986
|
|
|
987 exit (0);
|
|
|
988 }
|
|
|
989 #endif /* TEST */
|
|
231
|
990
|
|
|
991 #else
|
|
|
992
|
|
|
993 /* Emulate getloadavg. */
|
|
|
994 int
|
|
|
995 getloadavg (double loadavg[], int nelem)
|
|
|
996 {
|
|
|
997 int i;
|
|
|
998
|
|
|
999 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
1000 for (i = 0; i < nelem; i++)
|
|
|
1001 {
|
|
|
1002 loadavg[i] = 0.0;
|
|
|
1003 }
|
|
|
1004 return i;
|
|
|
1005 }
|
|
|
1006
|
|
|
1007 #endif /*__GNUWIN32__*/
|
|
|
1008
|
