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