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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 eunice UNIX emulator under VMS.
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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 VMS
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58 WIN32 No-op for Windows95/NT.
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59 __linux__ Linux: assumes /proc filesystem mounted.
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60 Support from Michael K. Johnson.
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61 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
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62
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63 In addition, to avoid nesting many #ifdefs, we internally set
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64 LDAV_DONE to indicate that the load average has been computed.
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65
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66 We also #define LDAV_PRIVILEGED if a program will require
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67 special installation to be able to call getloadavg. */
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68
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69 /* This should always be first. */
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70 #ifdef HAVE_CONFIG_H
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71 #include <config.h>
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72 #endif
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73
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74 #include <sys/types.h>
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75
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76 /* Both the Emacs and non-Emacs sections want this. Some
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77 configuration files' definitions for the LOAD_AVE_CVT macro (like
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78 sparc.h's) use macros like FSCALE, defined here. */
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79 #ifdef unix
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80 #include <sys/param.h>
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81 #endif
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82
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48
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83 #ifdef XEMACS
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0
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84 #include "lisp.h" /* for encapsulated open, close, read, write */
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48
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85 #endif /* XEMACS */
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0
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86
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87 /* Exclude all the code except the test program at the end
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88 if the system has its own `getloadavg' function.
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89
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90 The declaration of `errno' is needed by the test program
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91 as well as the function itself, so it comes first. */
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92
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93 #include <errno.h>
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94
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95 #ifndef errno
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96 extern int errno;
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97 #endif
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98
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99 #ifndef HAVE_GETLOADAVG
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100
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101 /* The existing Emacs configuration files define a macro called
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102 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
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103 returns the load average multiplied by 100. What we actually want
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104 is a macro called LDAV_CVT, which returns the load average as an
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105 unmultiplied double.
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106
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107 For backwards compatibility, we'll define LDAV_CVT in terms of
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108 LOAD_AVE_CVT, but future machine config files should just define
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109 LDAV_CVT directly. */
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110
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111 #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
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112 #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
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113 #endif
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114
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48
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115 #ifdef XEMACS
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116 #if defined (HAVE_KSTAT_H)
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117 #include <kstat.h>
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118 #endif /* HAVE_KSTAT_H */
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119 #endif /* XEMACS */
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120
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0
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121 #if !defined (BSD) && defined (ultrix)
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122 /* Ultrix behaves like BSD on Vaxen. */
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123 #define BSD
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124 #endif
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125
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126 #ifdef NeXT
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127 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
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128 conflicts with the definition understood in this file, that this
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129 really is BSD. */
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130 #undef BSD
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131
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132 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
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133 defined to mean that the nlist method should be used, which is not true. */
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134 #undef FSCALE
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135 #endif
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136
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137 /* Set values that are different from the defaults, which are
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138 set a little farther down with #ifndef. */
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139
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140
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141 /* Some shorthands. */
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142
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143 #if defined (HPUX) && !defined (hpux)
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144 #define hpux
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145 #endif
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146
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147 #if defined(hp300) && !defined(hpux)
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148 #define MORE_BSD
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149 #endif
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150
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151 #if defined(ultrix) && defined(mips)
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152 #define decstation
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153 #endif
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154
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48
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155 #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
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0
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156 #define SUNOS_5
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157 #endif
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158
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159 #if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
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160 #define OSF_ALPHA
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151
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161 #include <netdb.h>
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162 #include <netinet/in.h> /* Needed for Digital UNIX V3 */
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163 #include <net/proto_net.h>
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0
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164 #include <sys/table.h>
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165 #endif
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166
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167 #if defined (__osf__) && (defined (mips) || defined (__mips__))
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168 #define OSF_MIPS
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169 #include <sys/table.h>
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170 #endif
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171
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172 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
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173 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
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174 that with a couple of other things and we'll have a unique match. */
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175 #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
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176 #define tek4300 /* Define by emacs, but not by other users. */
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177 #endif
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178
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179
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180 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
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181 #ifndef LOAD_AVE_TYPE
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182
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183 #ifdef MORE_BSD
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184 #define LOAD_AVE_TYPE long
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185 #endif
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186
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187 #ifdef sun
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188 #define LOAD_AVE_TYPE long
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189 #endif
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190
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191 #ifdef decstation
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192 #define LOAD_AVE_TYPE long
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193 #endif
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194
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195 #ifdef _SEQUENT_
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196 #define LOAD_AVE_TYPE long
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197 #endif
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198
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199 #ifdef sgi
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200 #define LOAD_AVE_TYPE long
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201 #endif
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202
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203 #ifdef SVR4
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204 #define LOAD_AVE_TYPE long
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205 #endif
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206
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207 #ifdef sony_news
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208 #define LOAD_AVE_TYPE long
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209 #endif
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210
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211 #ifdef sequent
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212 #define LOAD_AVE_TYPE long
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213 #endif
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214
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215 #ifdef OSF_ALPHA
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216 #define LOAD_AVE_TYPE long
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217 #endif
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218
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219 #if defined (ardent) && defined (titan)
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220 #define LOAD_AVE_TYPE long
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221 #endif
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222
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223 #ifdef tek4300
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224 #define LOAD_AVE_TYPE long
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225 #endif
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226
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227 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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228 #define LOAD_AVE_TYPE long
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229 #endif
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230
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231 #ifdef _AIX
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232 #define LOAD_AVE_TYPE long
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233 #endif
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234
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235 #ifdef convex
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236 #define LOAD_AVE_TYPE double
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237 #ifndef LDAV_CVT
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238 #define LDAV_CVT(n) (n)
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239 #endif
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240 #endif
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241
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242 #endif /* No LOAD_AVE_TYPE. */
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243
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244 #ifdef OSF_ALPHA
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245 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
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246 according to ghazi@noc.rutgers.edu. */
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247 #undef FSCALE
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248 #define FSCALE 1024.0
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249 #endif
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250
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251 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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252 /* <sys/param.h> defines an incorrect value for FSCALE on an
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253 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
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254 #undef FSCALE
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255 #define FSCALE 100.0
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256 #endif
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257
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258
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259 #ifndef FSCALE
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260
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261 /* SunOS and some others define FSCALE in sys/param.h. */
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262
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263 #ifdef MORE_BSD
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264 #define FSCALE 2048.0
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265 #endif
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266
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267 #if defined(MIPS) || defined(SVR4) || defined(decstation)
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268 #define FSCALE 256
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269 #endif
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270
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271 #if defined (sgi) || defined (sequent)
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272 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
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273 above under #ifdef MIPS. But we want the sgi value. */
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274 #undef FSCALE
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275 #define FSCALE 1000.0
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276 #endif
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277
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278 #if defined (ardent) && defined (titan)
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279 #define FSCALE 65536.0
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280 #endif
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281
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282 #ifdef tek4300
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283 #define FSCALE 100.0
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284 #endif
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285
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286 #ifdef _AIX
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287 #define FSCALE 65536.0
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288 #endif
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289
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290 #endif /* Not FSCALE. */
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291
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292 #if !defined (LDAV_CVT) && defined (FSCALE)
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293 #define LDAV_CVT(n) (((double) (n)) / FSCALE)
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294 #endif
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295
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296 /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
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297 #ifndef NLIST_STRUCT
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298
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299 #ifdef MORE_BSD
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300 #define NLIST_STRUCT
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301 #endif
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302
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303 #ifdef sun
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304 #define NLIST_STRUCT
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305 #endif
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306
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307 #ifdef decstation
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308 #define NLIST_STRUCT
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309 #endif
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310
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311 #ifdef hpux
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312 #define NLIST_STRUCT
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313 #endif
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314
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315 #if defined (_SEQUENT_) || defined (sequent)
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316 #define NLIST_STRUCT
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317 #endif
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318
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319 #ifdef sgi
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320 #define NLIST_STRUCT
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321 #endif
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322
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323 #ifdef SVR4
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324 #define NLIST_STRUCT
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325 #endif
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326
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327 #ifdef sony_news
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328 #define NLIST_STRUCT
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329 #endif
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330
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331 #ifdef OSF_ALPHA
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332 #define NLIST_STRUCT
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333 #endif
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334
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335 #if defined (ardent) && defined (titan)
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336 #define NLIST_STRUCT
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337 #endif
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338
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339 #ifdef tek4300
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340 #define NLIST_STRUCT
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341 #endif
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342
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343 #ifdef butterfly
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344 #define NLIST_STRUCT
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345 #endif
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346
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347 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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348 #define NLIST_STRUCT
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349 #endif
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350
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351 #ifdef _AIX
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352 #define NLIST_STRUCT
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353 #endif
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354
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355 #endif /* defined (NLIST_STRUCT) */
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356
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357
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358 #if defined(sgi) || (defined(mips) && !defined(BSD))
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359 #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
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360 #endif
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361
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362
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363 #if !defined (KERNEL_FILE) && defined (sequent)
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364 #define KERNEL_FILE "/dynix"
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365 #endif
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366
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367 #if !defined (KERNEL_FILE) && defined (hpux)
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368 #define KERNEL_FILE "/hp-ux"
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369 #endif
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370
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371 #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
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372 #define KERNEL_FILE "/unix"
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373 #endif
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374
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375
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376 #if !defined (LDAV_SYMBOL) && defined (alliant)
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377 #define LDAV_SYMBOL "_Loadavg"
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378 #endif
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379
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380 #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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381 #define LDAV_SYMBOL "avenrun"
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382 #endif
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383
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48
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384 #ifdef HAVE_UNISTD_H
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0
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385 #include <unistd.h>
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48
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386 #endif
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0
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387
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388 #include <stdio.h>
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389
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390 /* LOAD_AVE_TYPE should only get defined if we're going to use the
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391 nlist method. */
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392 #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
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393 #define LOAD_AVE_TYPE double
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394 #endif
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395
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396 #ifdef LOAD_AVE_TYPE
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397
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398 #ifndef VMS
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399 #ifndef NLIST_STRUCT
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400 #include <a.out.h>
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401 #else /* NLIST_STRUCT */
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402 #include <nlist.h>
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403 #endif /* NLIST_STRUCT */
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404
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405 #ifdef SUNOS_5
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406 #include <fcntl.h>
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407 #include <kvm.h>
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408 #endif
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409
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410 #ifndef KERNEL_FILE
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411 #define KERNEL_FILE "/vmunix"
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412 #endif /* KERNEL_FILE */
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413
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414 #ifndef LDAV_SYMBOL
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415 #define LDAV_SYMBOL "_avenrun"
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416 #endif /* LDAV_SYMBOL */
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417
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418 #else /* VMS */
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419
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420 #ifndef eunice
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421 #include <iodef.h>
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422 #include <descrip.h>
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423 #else /* eunice */
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424 #include <vms/iodef.h>
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|
|
425 #endif /* eunice */
|
|
|
426 #endif /* VMS */
|
|
|
427
|
|
|
428 #ifndef LDAV_CVT
|
|
|
429 #define LDAV_CVT(n) ((double) (n))
|
|
|
430 #endif /* !LDAV_CVT */
|
|
|
431
|
|
|
432 #endif /* LOAD_AVE_TYPE */
|
|
|
433
|
|
|
434 #ifdef NeXT
|
|
|
435 #ifdef HAVE_MACH_MACH_H
|
|
|
436 #include <mach/mach.h>
|
|
|
437 #else
|
|
|
438 #include <mach.h>
|
|
|
439 #endif
|
|
|
440 #endif /* NeXT */
|
|
|
441
|
|
|
442 #ifdef sgi
|
|
|
443 #include <sys/sysmp.h>
|
|
|
444 #endif /* sgi */
|
|
|
445
|
|
|
446 #ifdef UMAX
|
|
|
447 #include <stdio.h>
|
|
|
448 #include <signal.h>
|
|
|
449 #include <sys/time.h>
|
|
|
450 #include <sys/wait.h>
|
|
|
451 #include <sys/syscall.h>
|
|
|
452
|
|
|
453 #ifdef UMAX_43
|
|
|
454 #include <machine/cpu.h>
|
|
|
455 #include <inq_stats/statistics.h>
|
|
|
456 #include <inq_stats/sysstats.h>
|
|
|
457 #include <inq_stats/cpustats.h>
|
|
|
458 #include <inq_stats/procstats.h>
|
|
|
459 #else /* Not UMAX_43. */
|
|
|
460 #include <sys/sysdefs.h>
|
|
|
461 #include <sys/statistics.h>
|
|
|
462 #include <sys/sysstats.h>
|
|
|
463 #include <sys/cpudefs.h>
|
|
|
464 #include <sys/cpustats.h>
|
|
|
465 #include <sys/procstats.h>
|
|
|
466 #endif /* Not UMAX_43. */
|
|
|
467 #endif /* UMAX */
|
|
|
468
|
|
|
469 #ifdef DGUX
|
|
|
470 #include <sys/dg_sys_info.h>
|
|
|
471 #endif
|
|
|
472
|
|
48
|
473 #ifdef XEMACS
|
|
|
474 #if defined (HAVE_SYS_PSTAT_H)
|
|
0
|
475 #include <sys/pstat.h>
|
|
48
|
476 #endif /* HAVE_SYS_PSTAT_H (on HPUX) */
|
|
|
477 #endif /* XEMACS */
|
|
0
|
478
|
|
|
479 #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
|
|
|
480 #include <fcntl.h>
|
|
|
481 #else
|
|
|
482 #include <sys/file.h>
|
|
|
483 #endif
|
|
|
484
|
|
|
485 /* Avoid static vars inside a function since in HPUX they dump as pure. */
|
|
|
486
|
|
|
487 #ifdef NeXT
|
|
|
488 static processor_set_t default_set;
|
|
|
489 static int getloadavg_initialized;
|
|
|
490 #endif /* NeXT */
|
|
|
491
|
|
|
492 #ifdef UMAX
|
|
|
493 static unsigned int cpus = 0;
|
|
|
494 static unsigned int samples;
|
|
|
495 #endif /* UMAX */
|
|
|
496
|
|
|
497 #ifdef DGUX
|
|
|
498 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
|
|
|
499 #endif /* DGUX */
|
|
|
500
|
|
|
501 #ifdef LOAD_AVE_TYPE
|
|
|
502 /* File descriptor open to /dev/kmem or VMS load ave driver. */
|
|
|
503 static int channel;
|
|
|
504 /* Nonzero iff channel is valid. */
|
|
|
505 static int getloadavg_initialized;
|
|
|
506 /* Offset in kmem to seek to read load average, or 0 means invalid. */
|
|
|
507 static long offset;
|
|
|
508
|
|
|
509 #if !defined(VMS) && !defined(sgi)
|
|
|
510 static struct nlist nl[2];
|
|
|
511 #endif /* Not VMS or sgi */
|
|
|
512
|
|
|
513 #ifdef SUNOS_5
|
|
|
514 static kvm_t *kd;
|
|
|
515 #endif /* SUNOS_5 */
|
|
|
516
|
|
|
517 #endif /* LOAD_AVE_TYPE */
|
|
|
518
|
|
|
519 /* Put the 1 minute, 5 minute and 15 minute load averages
|
|
|
520 into the first NELEM elements of LOADAVG.
|
|
|
521 Return the number written (never more than 3, but may be less than NELEM),
|
|
|
522 or -1 if an error occurred. */
|
|
|
523
|
|
|
524 int
|
|
84
|
525 getloadavg (double loadavg[], int nelem)
|
|
0
|
526 {
|
|
|
527 int elem = 0; /* Return value. */
|
|
|
528
|
|
|
529 #ifdef NO_GET_LOAD_AVG
|
|
|
530 #define LDAV_DONE
|
|
|
531 /* Set errno to zero to indicate that there was no particular error;
|
|
|
532 this function just can't work at all on this system. */
|
|
|
533 errno = 0;
|
|
|
534 elem = -1;
|
|
|
535 #endif
|
|
|
536
|
|
48
|
537 #ifdef XEMACS
|
|
|
538 #if ! defined (LDAV_DONE) && defined (HAVE_KSTAT_H) && defined (HAVE_LIBKSTAT)
|
|
|
539 #define LDAV_DONE
|
|
185
|
540
|
|
48
|
541 /* getloadavg is best implemented using kstat (kernel stats),
|
|
|
542 on systems (like SunOS5) that support it,
|
|
|
543 since you don't have to be superusers to use it.
|
|
|
544 Thanks to Zlatko Calusic <zcalusic@srce.hr>.
|
|
|
545 Integrated to XEmacs by Hrvoje Niksic <hniksic@srce.hr>. */
|
|
|
546 static kstat_ctl_t *kc;
|
|
|
547 static kstat_t *ksp;
|
|
|
548 static kstat_named_t *buf;
|
|
|
549
|
|
|
550 if (!getloadavg_initialized)
|
|
|
551 {
|
|
|
552 kc = kstat_open();
|
|
|
553 if (!kc)
|
|
|
554 return -1;
|
|
|
555 getloadavg_initialized = 1;
|
|
|
556 }
|
|
|
557 ksp = kstat_lookup(kc, "unix", 0, "system_misc");
|
|
|
558 if (!ksp)
|
|
|
559 return -1;
|
|
|
560 if (kstat_read(kc, ksp, ksp->ks_data) < 0)
|
|
|
561 return -1;
|
|
185
|
562 buf = (kstat_named_t *) malloc (ksp->ks_data_size);
|
|
48
|
563 if (!buf)
|
|
|
564 return -1;
|
|
|
565 memcpy(buf, ksp->ks_data, ksp->ks_data_size);
|
|
|
566 if (nelem > 3)
|
|
|
567 nelem = 3;
|
|
|
568 for (elem = 0; elem < nelem; elem++)
|
|
|
569 loadavg[elem] = (buf + 6 + elem)->value.ul / 256.0;
|
|
|
570 free(buf);
|
|
185
|
571
|
|
48
|
572 #endif /* HAVE_KSTAT_H && HAVE_LIBKSTAT */
|
|
82
|
573
|
|
|
574 #if !defined (LDAV_DONE) && defined (HAVE_SYS_PSTAT_H)
|
|
|
575 #define LDAV_DONE
|
|
|
576 /* This is totally undocumented, and is not guaranteed to work, but
|
|
|
577 mayhap it might .... If it does work, it will work only on HP-UX
|
|
|
578 8.0 or later. -- Darryl Okahata <darrylo@sr.hp.com> */
|
|
|
579 #undef LOAD_AVE_TYPE /* Make sure these don't exist. */
|
|
|
580 #undef LOAD_AVE_CVT
|
|
|
581 #undef LDAV_SYMBOL
|
|
|
582 struct pst_dynamic procinfo;
|
|
|
583 union pstun statbuf;
|
|
|
584
|
|
|
585 statbuf.pst_dynamic = &procinfo;
|
|
|
586 if (pstat (PSTAT_DYNAMIC, statbuf, sizeof (struct pst_dynamic), 0, 0) == -1)
|
|
|
587 return (-1);
|
|
|
588 loadavg[elem++] = procinfo.psd_avg_1_min;
|
|
|
589 loadavg[elem++] = procinfo.psd_avg_5_min;
|
|
|
590 loadavg[elem++] = procinfo.psd_avg_15_min;
|
|
|
591 #endif /* HPUX */
|
|
|
592
|
|
48
|
593 #endif /* XEMACS */
|
|
|
594
|
|
0
|
595 #if !defined (LDAV_DONE) && defined (__linux__)
|
|
|
596 #define LDAV_DONE
|
|
|
597 #undef LOAD_AVE_TYPE
|
|
|
598
|
|
|
599 #ifndef LINUX_LDAV_FILE
|
|
|
600 #define LINUX_LDAV_FILE "/proc/loadavg"
|
|
|
601 #endif
|
|
|
602
|
|
|
603 char ldavgbuf[40];
|
|
|
604 double load_ave[3];
|
|
|
605 int fd, count;
|
|
|
606
|
|
|
607 fd = open (LINUX_LDAV_FILE, O_RDONLY);
|
|
|
608 if (fd == -1)
|
|
|
609 return -1;
|
|
|
610 count = read (fd, ldavgbuf, 40);
|
|
|
611 (void) close (fd);
|
|
|
612 if (count <= 0)
|
|
|
613 return -1;
|
|
|
614
|
|
|
615 count = sscanf (ldavgbuf, "%lf %lf %lf",
|
|
|
616 &load_ave[0], &load_ave[1], &load_ave[2]);
|
|
|
617 if (count < 1)
|
|
|
618 return -1;
|
|
|
619
|
|
|
620 for (elem = 0; elem < nelem && elem < count; elem++)
|
|
|
621 loadavg[elem] = load_ave[elem];
|
|
|
622
|
|
|
623 return elem;
|
|
|
624
|
|
|
625 #endif /* __linux__ */
|
|
|
626
|
|
|
627 #if !defined (LDAV_DONE) && defined (__NetBSD__)
|
|
|
628 #define LDAV_DONE
|
|
|
629 #undef LOAD_AVE_TYPE
|
|
|
630
|
|
|
631 #ifndef NETBSD_LDAV_FILE
|
|
|
632 #define NETBSD_LDAV_FILE "/kern/loadavg"
|
|
|
633 #endif
|
|
|
634
|
|
|
635 unsigned long int load_ave[3], scale;
|
|
|
636 int count;
|
|
|
637 FILE *fp;
|
|
|
638
|
|
|
639 fp = fopen (NETBSD_LDAV_FILE, "r");
|
|
|
640 if (fp == NULL)
|
|
|
641 return -1;
|
|
|
642 count = fscanf (fp, "%lu %lu %lu %lu\n",
|
|
|
643 &load_ave[0], &load_ave[1], &load_ave[2],
|
|
|
644 &scale);
|
|
|
645 (void) fclose (fp);
|
|
|
646 if (count != 4)
|
|
|
647 return -1;
|
|
|
648
|
|
|
649 for (elem = 0; elem < nelem; elem++)
|
|
|
650 loadavg[elem] = (double) load_ave[elem] / (double) scale;
|
|
|
651
|
|
|
652 return elem;
|
|
|
653
|
|
|
654 #endif /* __NetBSD__ */
|
|
|
655
|
|
|
656 #if !defined (LDAV_DONE) && defined (NeXT)
|
|
|
657 #define LDAV_DONE
|
|
|
658 /* The NeXT code was adapted from iscreen 3.2. */
|
|
|
659
|
|
|
660 host_t host;
|
|
|
661 struct processor_set_basic_info info;
|
|
|
662 unsigned info_count;
|
|
|
663
|
|
48
|
664 /* We only know how to get the 1-minute average for this system,
|
|
|
665 so even if the caller asks for more than 1, we only return 1. */
|
|
0
|
666
|
|
|
667 if (!getloadavg_initialized)
|
|
|
668 {
|
|
|
669 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
|
|
|
670 getloadavg_initialized = 1;
|
|
|
671 }
|
|
|
672
|
|
|
673 if (getloadavg_initialized)
|
|
|
674 {
|
|
|
675 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
|
|
|
676 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
|
|
|
677 (processor_set_info_t) &info, &info_count)
|
|
|
678 != KERN_SUCCESS)
|
|
|
679 getloadavg_initialized = 0;
|
|
|
680 else
|
|
|
681 {
|
|
|
682 if (nelem > 0)
|
|
|
683 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
|
|
684 }
|
|
|
685 }
|
|
|
686
|
|
|
687 if (!getloadavg_initialized)
|
|
|
688 return -1;
|
|
|
689 #endif /* NeXT */
|
|
|
690
|
|
|
691 #if !defined (LDAV_DONE) && defined (UMAX)
|
|
|
692 #define LDAV_DONE
|
|
|
693 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
|
|
|
694 have a /dev/kmem. Information about the workings of the running kernel
|
|
|
695 can be gathered with inq_stats system calls.
|
|
|
696 We only know how to get the 1-minute average for this system. */
|
|
|
697
|
|
|
698 struct proc_summary proc_sum_data;
|
|
|
699 struct stat_descr proc_info;
|
|
|
700 double load;
|
|
203
|
701 REGISTER unsigned int i, j;
|
|
0
|
702
|
|
|
703 if (cpus == 0)
|
|
|
704 {
|
|
203
|
705 REGISTER unsigned int c, i;
|
|
0
|
706 struct cpu_config conf;
|
|
|
707 struct stat_descr desc;
|
|
|
708
|
|
|
709 desc.sd_next = 0;
|
|
|
710 desc.sd_subsys = SUBSYS_CPU;
|
|
|
711 desc.sd_type = CPUTYPE_CONFIG;
|
|
|
712 desc.sd_addr = (char *) &conf;
|
|
|
713 desc.sd_size = sizeof conf;
|
|
|
714
|
|
|
715 if (inq_stats (1, &desc))
|
|
|
716 return -1;
|
|
|
717
|
|
|
718 c = 0;
|
|
|
719 for (i = 0; i < conf.config_maxclass; ++i)
|
|
|
720 {
|
|
|
721 struct class_stats stats;
|
|
|
722 bzero ((char *) &stats, sizeof stats);
|
|
|
723
|
|
|
724 desc.sd_type = CPUTYPE_CLASS;
|
|
|
725 desc.sd_objid = i;
|
|
|
726 desc.sd_addr = (char *) &stats;
|
|
|
727 desc.sd_size = sizeof stats;
|
|
|
728
|
|
|
729 if (inq_stats (1, &desc))
|
|
|
730 return -1;
|
|
|
731
|
|
|
732 c += stats.class_numcpus;
|
|
|
733 }
|
|
|
734 cpus = c;
|
|
|
735 samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
|
|
736 }
|
|
|
737
|
|
|
738 proc_info.sd_next = 0;
|
|
|
739 proc_info.sd_subsys = SUBSYS_PROC;
|
|
|
740 proc_info.sd_type = PROCTYPE_SUMMARY;
|
|
|
741 proc_info.sd_addr = (char *) &proc_sum_data;
|
|
|
742 proc_info.sd_size = sizeof (struct proc_summary);
|
|
|
743 proc_info.sd_sizeused = 0;
|
|
|
744
|
|
|
745 if (inq_stats (1, &proc_info) != 0)
|
|
|
746 return -1;
|
|
|
747
|
|
|
748 load = proc_sum_data.ps_nrunnable;
|
|
|
749 j = 0;
|
|
|
750 for (i = samples - 1; i > 0; --i)
|
|
|
751 {
|
|
|
752 load += proc_sum_data.ps_nrun[j];
|
|
|
753 if (j++ == PS_NRUNSIZE)
|
|
|
754 j = 0;
|
|
|
755 }
|
|
|
756
|
|
|
757 if (nelem > 0)
|
|
|
758 loadavg[elem++] = load / samples / cpus;
|
|
|
759 #endif /* UMAX */
|
|
|
760
|
|
|
761 #if !defined (LDAV_DONE) && defined (DGUX)
|
|
|
762 #define LDAV_DONE
|
|
|
763 /* This call can return -1 for an error, but with good args
|
|
|
764 it's not supposed to fail. The first argument is for no
|
|
|
765 apparent reason of type `long int *'. */
|
|
|
766 dg_sys_info ((long int *) &load_info,
|
|
|
767 DG_SYS_INFO_LOAD_INFO_TYPE,
|
|
|
768 DG_SYS_INFO_LOAD_VERSION_0);
|
|
|
769
|
|
|
770 if (nelem > 0)
|
|
|
771 loadavg[elem++] = load_info.one_minute;
|
|
|
772 if (nelem > 1)
|
|
|
773 loadavg[elem++] = load_info.five_minute;
|
|
|
774 if (nelem > 2)
|
|
|
775 loadavg[elem++] = load_info.fifteen_minute;
|
|
|
776 #endif /* DGUX */
|
|
|
777
|
|
|
778 #if !defined (LDAV_DONE) && defined (apollo)
|
|
|
779 #define LDAV_DONE
|
|
|
780 /* Apollo code from lisch@mentorg.com (Ray Lischner).
|
|
|
781
|
|
|
782 This system call is not documented. The load average is obtained as
|
|
|
783 three long integers, for the load average over the past minute,
|
|
|
784 five minutes, and fifteen minutes. Each value is a scaled integer,
|
|
|
785 with 16 bits of integer part and 16 bits of fraction part.
|
|
|
786
|
|
|
787 I'm not sure which operating system first supported this system call,
|
|
|
788 but I know that SR10.2 supports it. */
|
|
|
789
|
|
|
790 extern void proc1_$get_loadav ();
|
|
|
791 unsigned long load_ave[3];
|
|
|
792
|
|
|
793 proc1_$get_loadav (load_ave);
|
|
|
794
|
|
|
795 if (nelem > 0)
|
|
|
796 loadavg[elem++] = load_ave[0] / 65536.0;
|
|
|
797 if (nelem > 1)
|
|
|
798 loadavg[elem++] = load_ave[1] / 65536.0;
|
|
|
799 if (nelem > 2)
|
|
|
800 loadavg[elem++] = load_ave[2] / 65536.0;
|
|
|
801 #endif /* apollo */
|
|
|
802
|
|
|
803 #if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
|
|
804 #define LDAV_DONE
|
|
|
805
|
|
|
806 struct tbl_loadavg load_ave;
|
|
|
807 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
48
|
808 loadavg[elem++]
|
|
|
809 = (load_ave.tl_lscale == 0
|
|
|
810 ? load_ave.tl_avenrun.d[0]
|
|
|
811 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
|
|
0
|
812 #endif /* OSF_MIPS */
|
|
|
813
|
|
|
814 #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32))
|
|
|
815 #define LDAV_DONE
|
|
|
816
|
|
|
817 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
818 for ( ; elem < nelem; elem++)
|
|
|
819 {
|
|
|
820 loadavg[elem] = 0.0;
|
|
|
821 }
|
|
|
822 #endif /* MSDOS */
|
|
|
823
|
|
|
824 #if !defined (LDAV_DONE) && defined (OSF_ALPHA)
|
|
|
825 #define LDAV_DONE
|
|
|
826
|
|
|
827 struct tbl_loadavg load_ave;
|
|
|
828 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
829 for (elem = 0; elem < nelem; elem++)
|
|
|
830 loadavg[elem]
|
|
|
831 = (load_ave.tl_lscale == 0
|
|
|
832 ? load_ave.tl_avenrun.d[elem]
|
|
|
833 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
|
|
|
834 #endif /* OSF_ALPHA */
|
|
|
835
|
|
|
836 #if !defined (LDAV_DONE) && defined (VMS)
|
|
|
837 /* VMS specific code -- read from the Load Ave driver. */
|
|
|
838
|
|
|
839 LOAD_AVE_TYPE load_ave[3];
|
|
|
840 static int getloadavg_initialized = 0;
|
|
|
841 #ifdef eunice
|
|
|
842 struct
|
|
|
843 {
|
|
|
844 int dsc$w_length;
|
|
|
845 char *dsc$a_pointer;
|
|
|
846 } descriptor;
|
|
|
847 #endif
|
|
|
848
|
|
|
849 /* Ensure that there is a channel open to the load ave device. */
|
|
|
850 if (!getloadavg_initialized)
|
|
|
851 {
|
|
|
852 /* Attempt to open the channel. */
|
|
|
853 #ifdef eunice
|
|
|
854 descriptor.dsc$w_length = 18;
|
|
|
855 descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE";
|
|
|
856 #else
|
|
|
857 $DESCRIPTOR (descriptor, "LAV0:");
|
|
|
858 #endif
|
|
|
859 if (sys$assign (&descriptor, &channel, 0, 0) & 1)
|
|
|
860 getloadavg_initialized = 1;
|
|
|
861 }
|
|
|
862
|
|
|
863 /* Read the load average vector. */
|
|
|
864 if (getloadavg_initialized
|
|
|
865 && !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
|
|
|
866 load_ave, 12, 0, 0, 0, 0) & 1))
|
|
|
867 {
|
|
|
868 sys$dassgn (channel);
|
|
|
869 getloadavg_initialized = 0;
|
|
|
870 }
|
|
|
871
|
|
|
872 if (!getloadavg_initialized)
|
|
|
873 return -1;
|
|
|
874 #endif /* VMS */
|
|
|
875
|
|
|
876 #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS)
|
|
|
877
|
|
|
878 /* UNIX-specific code -- read the average from /dev/kmem. */
|
|
|
879
|
|
|
880 #define LDAV_PRIVILEGED /* This code requires special installation. */
|
|
|
881
|
|
|
882 LOAD_AVE_TYPE load_ave[3];
|
|
|
883
|
|
|
884 /* Get the address of LDAV_SYMBOL. */
|
|
|
885 if (offset == 0)
|
|
|
886 {
|
|
|
887 #ifndef sgi
|
|
|
888 #ifndef NLIST_STRUCT
|
|
|
889 strcpy (nl[0].n_name, LDAV_SYMBOL);
|
|
|
890 strcpy (nl[1].n_name, "");
|
|
|
891 #else /* NLIST_STRUCT */
|
|
|
892 #ifdef NLIST_NAME_UNION
|
|
|
893 nl[0].n_un.n_name = LDAV_SYMBOL;
|
|
|
894 nl[1].n_un.n_name = 0;
|
|
|
895 #else /* not NLIST_NAME_UNION */
|
|
84
|
896 nl[0].n_name = (char *) LDAV_SYMBOL;
|
|
0
|
897 nl[1].n_name = 0;
|
|
|
898 #endif /* not NLIST_NAME_UNION */
|
|
|
899 #endif /* NLIST_STRUCT */
|
|
|
900
|
|
|
901 #ifndef SUNOS_5
|
|
|
902 if (
|
|
|
903 #if !(defined (_AIX) && !defined (ps2))
|
|
|
904 nlist (KERNEL_FILE, nl)
|
|
|
905 #else /* _AIX */
|
|
|
906 knlist (nl, 1, sizeof (nl[0]))
|
|
|
907 #endif
|
|
|
908 >= 0)
|
|
|
909 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
|
|
910 {
|
|
|
911 #ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
|
|
912 FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
|
|
913 #endif
|
|
|
914 offset = nl[0].n_value;
|
|
|
915 }
|
|
|
916 #endif /* !SUNOS_5 */
|
|
|
917 #else /* sgi */
|
|
|
918 int ldav_off;
|
|
|
919
|
|
|
920 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
|
|
921 if (ldav_off != -1)
|
|
|
922 offset = (long) ldav_off & 0x7fffffff;
|
|
|
923 #endif /* sgi */
|
|
|
924 }
|
|
|
925
|
|
|
926 /* Make sure we have /dev/kmem open. */
|
|
|
927 if (!getloadavg_initialized)
|
|
|
928 {
|
|
|
929 #ifndef SUNOS_5
|
|
|
930 channel = open ("/dev/kmem", 0);
|
|
|
931 if (channel >= 0)
|
|
|
932 {
|
|
|
933 /* Set the channel to close on exec, so it does not
|
|
|
934 litter any child's descriptor table. */
|
|
|
935 #ifdef FD_SETFD
|
|
|
936 #ifndef FD_CLOEXEC
|
|
|
937 #define FD_CLOEXEC 1
|
|
|
938 #endif
|
|
|
939 (void) fcntl (channel, F_SETFD, FD_CLOEXEC);
|
|
|
940 #endif
|
|
|
941 getloadavg_initialized = 1;
|
|
|
942 }
|
|
|
943 #else /* SUNOS_5 */
|
|
|
944 /* We pass 0 for the kernel, corefile, and swapfile names
|
|
|
945 to use the currently running kernel. */
|
|
|
946 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
|
|
947 if (kd != 0)
|
|
|
948 {
|
|
|
949 /* nlist the currently running kernel. */
|
|
|
950 kvm_nlist (kd, nl);
|
|
|
951 offset = nl[0].n_value;
|
|
|
952 getloadavg_initialized = 1;
|
|
|
953 }
|
|
|
954 #endif /* SUNOS_5 */
|
|
|
955 }
|
|
|
956
|
|
|
957 /* If we can, get the load average values. */
|
|
|
958 if (offset && getloadavg_initialized)
|
|
|
959 {
|
|
|
960 /* Try to read the load. */
|
|
|
961 #ifndef SUNOS_5
|
|
|
962 if (lseek (channel, offset, 0) == -1L
|
|
|
963 || read (channel, (char *) load_ave, sizeof (load_ave))
|
|
|
964 != sizeof (load_ave))
|
|
|
965 {
|
|
|
966 close (channel);
|
|
|
967 getloadavg_initialized = 0;
|
|
|
968 }
|
|
|
969 #else /* SUNOS_5 */
|
|
|
970 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
|
|
971 != sizeof (load_ave))
|
|
|
972 {
|
|
|
973 kvm_close (kd);
|
|
|
974 getloadavg_initialized = 0;
|
|
|
975 }
|
|
|
976 #endif /* SUNOS_5 */
|
|
|
977 }
|
|
|
978
|
|
|
979 if (offset == 0 || !getloadavg_initialized)
|
|
|
980 return -1;
|
|
|
981 #endif /* LOAD_AVE_TYPE and not VMS */
|
|
|
982
|
|
|
983 #if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
|
|
|
984 if (nelem > 0)
|
|
|
985 loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
|
|
986 if (nelem > 1)
|
|
|
987 loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
|
|
988 if (nelem > 2)
|
|
|
989 loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
|
|
990
|
|
|
991 #define LDAV_DONE
|
|
|
992 #endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
|
|
993
|
|
|
994 #ifdef LDAV_DONE
|
|
|
995 return elem;
|
|
|
996 #else
|
|
|
997 /* Set errno to zero to indicate that there was no particular error;
|
|
|
998 this function just can't work at all on this system. */
|
|
|
999 errno = 0;
|
|
|
1000 return -1;
|
|
|
1001 #endif
|
|
|
1002 }
|
|
|
1003
|
|
|
1004 #endif /* ! HAVE_GETLOADAVG */
|
|
|
1005
|
|
|
1006 #ifdef TEST
|
|
|
1007 void
|
|
84
|
1008 main (int argc, char **argv)
|
|
0
|
1009 {
|
|
|
1010 int naptime = 0;
|
|
|
1011
|
|
|
1012 if (argc > 1)
|
|
|
1013 naptime = atoi (argv[1]);
|
|
|
1014
|
|
|
1015 while (1)
|
|
|
1016 {
|
|
|
1017 double avg[3];
|
|
|
1018 int loads;
|
|
|
1019
|
|
|
1020 errno = 0; /* Don't be misled if it doesn't set errno. */
|
|
|
1021 loads = getloadavg (avg, 3);
|
|
|
1022 if (loads == -1)
|
|
|
1023 {
|
|
|
1024 perror ("Error getting load average");
|
|
|
1025 exit (1);
|
|
|
1026 }
|
|
|
1027 if (loads > 0)
|
|
|
1028 printf ("1-minute: %f ", avg[0]);
|
|
|
1029 if (loads > 1)
|
|
|
1030 printf ("5-minute: %f ", avg[1]);
|
|
|
1031 if (loads > 2)
|
|
|
1032 printf ("15-minute: %f ", avg[2]);
|
|
|
1033 if (loads > 0)
|
|
|
1034 putchar ('\n');
|
|
|
1035
|
|
|
1036 if (naptime == 0)
|
|
|
1037 break;
|
|
|
1038 sleep (naptime);
|
|
|
1039 }
|
|
|
1040
|
|
|
1041 exit (0);
|
|
|
1042 }
|
|
|
1043 #endif /* TEST */
|
