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0
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1 /* Get the system load averages.
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16
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2 Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93, 1994, 1995
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84
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3 Free Software Foundation, Inc.
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4
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5 This file is part of XEmacs.
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0
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6
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84
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7 XEmacs is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by the
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9 Free Software Foundation; either version 2, or (at your option) any
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10 later version.
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0
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11
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84
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12 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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0
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16
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84
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17 You should have received a copy of the GNU General Public License
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18 along with XEmacs; see the file COPYING. If not, write to
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19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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20 Boston, MA 02111-1307, USA. */
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21
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231
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22 #ifndef __CYGWIN32__
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0
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23
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24 /* Compile-time symbols that this file uses:
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25
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26 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
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27 KERNEL_FILE Pathname of the kernel to nlist.
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28 LDAV_CVT() Scale the load average from the kernel.
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29 Returns a double.
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30 LDAV_SYMBOL Name of kernel symbol giving load average.
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31 LOAD_AVE_TYPE Type of the load average array in the kernel.
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32 Must be defined unless one of
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33 apollo, DGUX, NeXT, or UMAX is defined;
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34 otherwise, no load average is available.
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35 NLIST_STRUCT Include nlist.h, not a.out.h, and
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36 the nlist n_name element is a pointer,
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37 not an array.
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38 NLIST_NAME_UNION struct nlist has an n_un member, not n_name.
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39 LINUX_LDAV_FILE [__linux__]: File containing load averages.
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40
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41 Specific system predefines this file uses, aside from setting
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42 default values if not emacs:
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43
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44 apollo
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45 BSD Real BSD, not just BSD-like.
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46 convex
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47 DGUX
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48 hpux
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49 MSDOS No-op for MSDOS.
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50 NeXT
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51 sgi
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52 sequent Sequent Dynix 3.x.x (BSD)
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53 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
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54 sony_news NEWS-OS (works at least for 4.1C)
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55 UMAX
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56 UMAX4_3
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57 WIN32 No-op for Windows95/NT.
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58 __linux__ Linux: assumes /proc filesystem mounted.
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59 Support from Michael K. Johnson.
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60 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
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286
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61 __OpenBSD__ OpenBSD: dito.
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0
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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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272
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84 #include "lisp.h"
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85 #include "sysfile.h" /* for encapsulated open, close, read, write */
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48
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86 #endif /* XEMACS */
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0
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87
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88 /* Exclude all the code except the test program at the end
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89 if the system has its own `getloadavg' function.
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90
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91 The declaration of `errno' is needed by the test program
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92 as well as the function itself, so it comes first. */
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93
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94 #include <errno.h>
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95
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96 #ifndef errno
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97 extern int errno;
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98 #endif
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99
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100 #ifndef HAVE_GETLOADAVG
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101
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102 /* The existing Emacs configuration files define a macro called
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103 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
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104 returns the load average multiplied by 100. What we actually want
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105 is a macro called LDAV_CVT, which returns the load average as an
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106 unmultiplied double.
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107
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108 For backwards compatibility, we'll define LDAV_CVT in terms of
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109 LOAD_AVE_CVT, but future machine config files should just define
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110 LDAV_CVT directly. */
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111
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112 #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
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113 #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
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114 #endif
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115
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48
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116 #ifdef XEMACS
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117 #if defined (HAVE_KSTAT_H)
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118 #include <kstat.h>
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119 #endif /* HAVE_KSTAT_H */
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120 #endif /* XEMACS */
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121
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0
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122 #if !defined (BSD) && defined (ultrix)
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123 /* Ultrix behaves like BSD on Vaxen. */
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124 #define BSD
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125 #endif
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126
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127 #ifdef NeXT
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128 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
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129 conflicts with the definition understood in this file, that this
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130 really is BSD. */
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131 #undef BSD
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132
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133 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
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134 defined to mean that the nlist method should be used, which is not true. */
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135 #undef FSCALE
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136 #endif
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137
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138 /* Set values that are different from the defaults, which are
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139 set a little farther down with #ifndef. */
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140
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141
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142 /* Some shorthands. */
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143
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144 #if defined (HPUX) && !defined (hpux)
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145 #define hpux
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146 #endif
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147
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148 #if defined(hp300) && !defined(hpux)
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149 #define MORE_BSD
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150 #endif
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151
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152 #if defined(ultrix) && defined(mips)
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153 #define decstation
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154 #endif
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155
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48
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156 #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
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0
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157 #define SUNOS_5
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158 #endif
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159
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160 #if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
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161 #define OSF_ALPHA
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151
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162 #include <netdb.h>
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163 #include <netinet/in.h> /* Needed for Digital UNIX V3 */
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164 #include <net/proto_net.h>
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0
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165 #include <sys/table.h>
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166 #endif
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167
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168 #if defined (__osf__) && (defined (mips) || defined (__mips__))
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169 #define OSF_MIPS
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170 #include <sys/table.h>
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171 #endif
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172
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173 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
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174 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
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175 that with a couple of other things and we'll have a unique match. */
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176 #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
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177 #define tek4300 /* Define by emacs, but not by other users. */
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178 #endif
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179
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180
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181 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
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182 #ifndef LOAD_AVE_TYPE
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183
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184 #ifdef MORE_BSD
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185 #define LOAD_AVE_TYPE long
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186 #endif
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187
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188 #ifdef sun
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189 #define LOAD_AVE_TYPE long
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190 #endif
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191
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192 #ifdef decstation
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193 #define LOAD_AVE_TYPE long
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194 #endif
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195
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196 #ifdef _SEQUENT_
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197 #define LOAD_AVE_TYPE long
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198 #endif
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199
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200 #ifdef sgi
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201 #define LOAD_AVE_TYPE long
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202 #endif
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203
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204 #ifdef SVR4
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205 #define LOAD_AVE_TYPE long
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206 #endif
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207
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208 #ifdef sony_news
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209 #define LOAD_AVE_TYPE long
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210 #endif
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211
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212 #ifdef sequent
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213 #define LOAD_AVE_TYPE long
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214 #endif
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215
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216 #ifdef OSF_ALPHA
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217 #define LOAD_AVE_TYPE long
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218 #endif
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219
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220 #if defined (ardent) && defined (titan)
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221 #define LOAD_AVE_TYPE long
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222 #endif
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223
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224 #ifdef tek4300
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225 #define LOAD_AVE_TYPE long
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226 #endif
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227
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228 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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229 #define LOAD_AVE_TYPE long
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230 #endif
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231
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232 #ifdef _AIX
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233 #define LOAD_AVE_TYPE long
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234 #endif
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235
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236 #ifdef convex
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237 #define LOAD_AVE_TYPE double
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238 #ifndef LDAV_CVT
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239 #define LDAV_CVT(n) (n)
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240 #endif
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241 #endif
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242
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243 #endif /* No LOAD_AVE_TYPE. */
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244
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245 #ifdef OSF_ALPHA
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246 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
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247 according to ghazi@noc.rutgers.edu. */
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248 #undef FSCALE
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249 #define FSCALE 1024.0
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250 #endif
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251
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252 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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253 /* <sys/param.h> defines an incorrect value for FSCALE on an
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254 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
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255 #undef FSCALE
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256 #define FSCALE 100.0
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257 #endif
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258
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259
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260 #ifndef FSCALE
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261
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262 /* SunOS and some others define FSCALE in sys/param.h. */
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263
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264 #ifdef MORE_BSD
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265 #define FSCALE 2048.0
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266 #endif
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267
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268 #if defined(MIPS) || defined(SVR4) || defined(decstation)
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269 #define FSCALE 256
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270 #endif
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271
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272 #if defined (sgi) || defined (sequent)
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273 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
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274 above under #ifdef MIPS. But we want the sgi value. */
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275 #undef FSCALE
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276 #define FSCALE 1000.0
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277 #endif
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278
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279 #if defined (ardent) && defined (titan)
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280 #define FSCALE 65536.0
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281 #endif
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282
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283 #ifdef tek4300
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284 #define FSCALE 100.0
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285 #endif
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286
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287 #ifdef _AIX
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288 #define FSCALE 65536.0
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289 #endif
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290
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291 #endif /* Not FSCALE. */
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292
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293 #if !defined (LDAV_CVT) && defined (FSCALE)
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294 #define LDAV_CVT(n) (((double) (n)) / FSCALE)
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295 #endif
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296
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297 /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
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298 #ifndef NLIST_STRUCT
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299
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300 #ifdef MORE_BSD
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301 #define NLIST_STRUCT
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302 #endif
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303
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304 #ifdef sun
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305 #define NLIST_STRUCT
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306 #endif
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307
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308 #ifdef decstation
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309 #define NLIST_STRUCT
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310 #endif
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311
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312 #ifdef hpux
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313 #define NLIST_STRUCT
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314 #endif
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315
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316 #if defined (_SEQUENT_) || defined (sequent)
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317 #define NLIST_STRUCT
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318 #endif
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319
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320 #ifdef sgi
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321 #define NLIST_STRUCT
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322 #endif
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323
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324 #ifdef SVR4
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325 #define NLIST_STRUCT
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326 #endif
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327
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328 #ifdef sony_news
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329 #define NLIST_STRUCT
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330 #endif
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331
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332 #ifdef OSF_ALPHA
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333 #define NLIST_STRUCT
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334 #endif
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335
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336 #if defined (ardent) && defined (titan)
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337 #define NLIST_STRUCT
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338 #endif
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339
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340 #ifdef tek4300
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341 #define NLIST_STRUCT
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342 #endif
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343
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344 #ifdef butterfly
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345 #define NLIST_STRUCT
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346 #endif
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347
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348 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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349 #define NLIST_STRUCT
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350 #endif
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351
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352 #ifdef _AIX
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353 #define NLIST_STRUCT
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354 #endif
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355
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356 #endif /* defined (NLIST_STRUCT) */
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357
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358
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359 #if defined(sgi) || (defined(mips) && !defined(BSD))
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360 #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
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361 #endif
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362
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363
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364 #if !defined (KERNEL_FILE) && defined (sequent)
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365 #define KERNEL_FILE "/dynix"
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366 #endif
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367
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368 #if !defined (KERNEL_FILE) && defined (hpux)
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369 #define KERNEL_FILE "/hp-ux"
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370 #endif
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371
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372 #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
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373 #define KERNEL_FILE "/unix"
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374 #endif
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375
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376
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377 #if !defined (LDAV_SYMBOL) && defined (alliant)
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378 #define LDAV_SYMBOL "_Loadavg"
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379 #endif
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380
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381 #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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382 #define LDAV_SYMBOL "avenrun"
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383 #endif
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384
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48
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385 #ifdef HAVE_UNISTD_H
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0
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386 #include <unistd.h>
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48
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387 #endif
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0
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388
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389 #include <stdio.h>
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390
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391 /* LOAD_AVE_TYPE should only get defined if we're going to use the
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392 nlist method. */
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393 #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
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394 #define LOAD_AVE_TYPE double
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395 #endif
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396
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397 #ifdef LOAD_AVE_TYPE
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398
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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 #ifndef LDAV_CVT
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419 #define LDAV_CVT(n) ((double) (n))
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420 #endif /* !LDAV_CVT */
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421
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422 #endif /* LOAD_AVE_TYPE */
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423
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424 #ifdef NeXT
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425 #ifdef HAVE_MACH_MACH_H
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426 #include <mach/mach.h>
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427 #else
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428 #include <mach.h>
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429 #endif
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430 #endif /* NeXT */
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431
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432 #ifdef sgi
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433 #include <sys/sysmp.h>
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434 #endif /* sgi */
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435
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436 #ifdef UMAX
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437 #include <stdio.h>
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438 #include <signal.h>
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439 #include <sys/time.h>
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440 #include <sys/wait.h>
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441 #include <sys/syscall.h>
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442
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443 #ifdef UMAX_43
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444 #include <machine/cpu.h>
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445 #include <inq_stats/statistics.h>
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446 #include <inq_stats/sysstats.h>
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447 #include <inq_stats/cpustats.h>
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448 #include <inq_stats/procstats.h>
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449 #else /* Not UMAX_43. */
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450 #include <sys/sysdefs.h>
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451 #include <sys/statistics.h>
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452 #include <sys/sysstats.h>
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453 #include <sys/cpudefs.h>
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454 #include <sys/cpustats.h>
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455 #include <sys/procstats.h>
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456 #endif /* Not UMAX_43. */
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457 #endif /* UMAX */
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458
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459 #ifdef DGUX
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460 #include <sys/dg_sys_info.h>
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461 #endif
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462
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48
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463 #ifdef XEMACS
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464 #if defined (HAVE_SYS_PSTAT_H)
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0
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465 #include <sys/pstat.h>
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48
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466 #endif /* HAVE_SYS_PSTAT_H (on HPUX) */
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467 #endif /* XEMACS */
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0
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468
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469 #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
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470 #include <fcntl.h>
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471 #else
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472 #include <sys/file.h>
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473 #endif
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474
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475 /* Avoid static vars inside a function since in HPUX they dump as pure. */
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476
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477 #ifdef NeXT
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478 static processor_set_t default_set;
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479 static int getloadavg_initialized;
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480 #endif /* NeXT */
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481
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482 #ifdef UMAX
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483 static unsigned int cpus = 0;
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484 static unsigned int samples;
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485 #endif /* UMAX */
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486
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487 #ifdef DGUX
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488 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
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489 #endif /* DGUX */
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490
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491 #ifdef LOAD_AVE_TYPE
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209
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492 /* File descriptor open to /dev/kmem */
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0
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493 static int channel;
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494 /* Nonzero iff channel is valid. */
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495 static int getloadavg_initialized;
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496 /* Offset in kmem to seek to read load average, or 0 means invalid. */
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497 static long offset;
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498
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209
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499 #ifndef sgi
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0
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500 static struct nlist nl[2];
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209
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501 #endif /* not sgi */
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0
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502
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503 #ifdef SUNOS_5
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504 static kvm_t *kd;
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505 #endif /* SUNOS_5 */
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506
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278
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507 #ifndef countof
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508 # define countof(x) (sizeof (x) / sizeof (*(x)))
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509 #endif
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510
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0
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511 #endif /* LOAD_AVE_TYPE */
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512
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513 /* Put the 1 minute, 5 minute and 15 minute load averages
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514 into the first NELEM elements of LOADAVG.
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515 Return the number written (never more than 3, but may be less than NELEM),
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516 or -1 if an error occurred. */
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517
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518 int
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84
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519 getloadavg (double loadavg[], int nelem)
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0
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520 {
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521 int elem = 0; /* Return value. */
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522
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523 #ifdef NO_GET_LOAD_AVG
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524 #define LDAV_DONE
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525 /* Set errno to zero to indicate that there was no particular error;
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526 this function just can't work at all on this system. */
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527 errno = 0;
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278
|
528 elem = -2;
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|
280
|
529 #endif /* NO_GET_LOAD_AVG */
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0
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530
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48
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531 #if ! defined (LDAV_DONE) && defined (HAVE_KSTAT_H) && defined (HAVE_LIBKSTAT)
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532 #define LDAV_DONE
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278
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533 /* getloadavg is best implemented using kstat (kernel stats), on
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534 systems (like SunOS5) that support it, since you don't need special
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535 privileges to use it.
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|
185
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536
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278
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537 Initial implementation courtesy Zlatko Calusic <zcalusic@carnet.hr>.
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538 Integrated to XEmacs by Hrvoje Niksic <hniksic@srce.hr>.
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|
539 Additional cleanup by Hrvoje Niksic, based on code published by
|
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|
540 Casper Dik <Casper.Dik@Holland.Sun.Com>. */
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|
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541 kstat_ctl_t *kc;
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542 kstat_t *ksp;
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543 static char *avestrings[] = { "avenrun_1min",
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544 "avenrun_5min",
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545 "avenrun_15min" };
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48
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546
|
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278
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547 if (nelem > countof (avestrings))
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548 nelem = countof (avestrings);
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549
|
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280
|
550 kc = kstat_open ();
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278
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551 if (!kc)
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552 return -1;
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|
553 ksp = kstat_lookup (kc, "unix", 0, "system_misc");
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554 if (!ksp)
|
|
48
|
555 {
|
|
278
|
556 kstat_close (kc);
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|
557 return -1;
|
|
48
|
558 }
|
|
278
|
559 if (kstat_read (kc, ksp, 0) < 0)
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|
560 {
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|
|
561 kstat_close (kc);
|
|
48
|
562 return -1;
|
|
278
|
563 }
|
|
48
|
564 for (elem = 0; elem < nelem; elem++)
|
|
278
|
565 {
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|
|
566 kstat_named_t *kn = kstat_data_lookup (ksp, avestrings[elem]);
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|
567 if (!kn)
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568 {
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|
|
569 kstat_close (kc);
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|
|
570 return -1;
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|
|
571 }
|
|
280
|
572 loadavg[elem] = (double)kn->value.ul / FSCALE;
|
|
278
|
573 }
|
|
|
574 kstat_close (kc);
|
|
48
|
575 #endif /* HAVE_KSTAT_H && HAVE_LIBKSTAT */
|
|
82
|
576
|
|
|
577 #if !defined (LDAV_DONE) && defined (HAVE_SYS_PSTAT_H)
|
|
|
578 #define LDAV_DONE
|
|
|
579 /* This is totally undocumented, and is not guaranteed to work, but
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|
580 mayhap it might .... If it does work, it will work only on HP-UX
|
|
|
581 8.0 or later. -- Darryl Okahata <darrylo@sr.hp.com> */
|
|
|
582 #undef LOAD_AVE_TYPE /* Make sure these don't exist. */
|
|
|
583 #undef LOAD_AVE_CVT
|
|
|
584 #undef LDAV_SYMBOL
|
|
|
585 struct pst_dynamic procinfo;
|
|
|
586 union pstun statbuf;
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|
|
587
|
|
|
588 statbuf.pst_dynamic = &procinfo;
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|
|
589 if (pstat (PSTAT_DYNAMIC, statbuf, sizeof (struct pst_dynamic), 0, 0) == -1)
|
|
|
590 return (-1);
|
|
|
591 loadavg[elem++] = procinfo.psd_avg_1_min;
|
|
|
592 loadavg[elem++] = procinfo.psd_avg_5_min;
|
|
|
593 loadavg[elem++] = procinfo.psd_avg_15_min;
|
|
|
594 #endif /* HPUX */
|
|
|
595
|
|
0
|
596 #if !defined (LDAV_DONE) && defined (__linux__)
|
|
|
597 #define LDAV_DONE
|
|
|
598 #undef LOAD_AVE_TYPE
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|
|
599
|
|
|
600 #ifndef LINUX_LDAV_FILE
|
|
|
601 #define LINUX_LDAV_FILE "/proc/loadavg"
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|
|
602 #endif
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|
|
603
|
|
|
604 char ldavgbuf[40];
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|
|
605 double load_ave[3];
|
|
|
606 int fd, count;
|
|
|
607
|
|
|
608 fd = open (LINUX_LDAV_FILE, O_RDONLY);
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|
|
609 if (fd == -1)
|
|
|
610 return -1;
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|
|
611 count = read (fd, ldavgbuf, 40);
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|
|
612 (void) close (fd);
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|
|
613 if (count <= 0)
|
|
|
614 return -1;
|
|
|
615
|
|
|
616 count = sscanf (ldavgbuf, "%lf %lf %lf",
|
|
|
617 &load_ave[0], &load_ave[1], &load_ave[2]);
|
|
|
618 if (count < 1)
|
|
|
619 return -1;
|
|
|
620
|
|
|
621 for (elem = 0; elem < nelem && elem < count; elem++)
|
|
|
622 loadavg[elem] = load_ave[elem];
|
|
|
623 #endif /* __linux__ */
|
|
|
624
|
|
286
|
625 #if !defined (LDAV_DONE) && defined (__NetBSD__) || defined (__OpenBSD__)
|
|
0
|
626 #define LDAV_DONE
|
|
|
627 #undef LOAD_AVE_TYPE
|
|
|
628
|
|
|
629 #ifndef NETBSD_LDAV_FILE
|
|
|
630 #define NETBSD_LDAV_FILE "/kern/loadavg"
|
|
|
631 #endif
|
|
|
632
|
|
|
633 unsigned long int load_ave[3], scale;
|
|
|
634 int count;
|
|
|
635 FILE *fp;
|
|
|
636
|
|
|
637 fp = fopen (NETBSD_LDAV_FILE, "r");
|
|
|
638 if (fp == NULL)
|
|
|
639 return -1;
|
|
|
640 count = fscanf (fp, "%lu %lu %lu %lu\n",
|
|
|
641 &load_ave[0], &load_ave[1], &load_ave[2],
|
|
|
642 &scale);
|
|
|
643 (void) fclose (fp);
|
|
|
644 if (count != 4)
|
|
|
645 return -1;
|
|
|
646
|
|
|
647 for (elem = 0; elem < nelem; elem++)
|
|
|
648 loadavg[elem] = (double) load_ave[elem] / (double) scale;
|
|
286
|
649 #endif /* __NetBSD__ or __OpenBSD__ */
|
|
0
|
650
|
|
|
651 #if !defined (LDAV_DONE) && defined (NeXT)
|
|
|
652 #define LDAV_DONE
|
|
|
653 /* The NeXT code was adapted from iscreen 3.2. */
|
|
|
654
|
|
|
655 host_t host;
|
|
|
656 struct processor_set_basic_info info;
|
|
|
657 unsigned info_count;
|
|
|
658
|
|
48
|
659 /* We only know how to get the 1-minute average for this system,
|
|
|
660 so even if the caller asks for more than 1, we only return 1. */
|
|
0
|
661
|
|
|
662 if (!getloadavg_initialized)
|
|
|
663 {
|
|
|
664 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
|
|
|
665 getloadavg_initialized = 1;
|
|
|
666 }
|
|
|
667
|
|
|
668 if (getloadavg_initialized)
|
|
|
669 {
|
|
|
670 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
|
|
|
671 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
|
|
|
672 (processor_set_info_t) &info, &info_count)
|
|
|
673 != KERN_SUCCESS)
|
|
|
674 getloadavg_initialized = 0;
|
|
|
675 else
|
|
|
676 {
|
|
|
677 if (nelem > 0)
|
|
|
678 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
|
|
679 }
|
|
|
680 }
|
|
|
681
|
|
|
682 if (!getloadavg_initialized)
|
|
|
683 return -1;
|
|
|
684 #endif /* NeXT */
|
|
|
685
|
|
|
686 #if !defined (LDAV_DONE) && defined (UMAX)
|
|
|
687 #define LDAV_DONE
|
|
|
688 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
|
|
|
689 have a /dev/kmem. Information about the workings of the running kernel
|
|
|
690 can be gathered with inq_stats system calls.
|
|
|
691 We only know how to get the 1-minute average for this system. */
|
|
|
692
|
|
|
693 struct proc_summary proc_sum_data;
|
|
|
694 struct stat_descr proc_info;
|
|
|
695 double load;
|
|
203
|
696 REGISTER unsigned int i, j;
|
|
0
|
697
|
|
|
698 if (cpus == 0)
|
|
|
699 {
|
|
203
|
700 REGISTER unsigned int c, i;
|
|
0
|
701 struct cpu_config conf;
|
|
|
702 struct stat_descr desc;
|
|
|
703
|
|
|
704 desc.sd_next = 0;
|
|
|
705 desc.sd_subsys = SUBSYS_CPU;
|
|
|
706 desc.sd_type = CPUTYPE_CONFIG;
|
|
|
707 desc.sd_addr = (char *) &conf;
|
|
|
708 desc.sd_size = sizeof conf;
|
|
|
709
|
|
|
710 if (inq_stats (1, &desc))
|
|
|
711 return -1;
|
|
|
712
|
|
|
713 c = 0;
|
|
|
714 for (i = 0; i < conf.config_maxclass; ++i)
|
|
|
715 {
|
|
|
716 struct class_stats stats;
|
|
282
|
717 memset ((char *) &stats, 0, sizeof stats);
|
|
0
|
718
|
|
|
719 desc.sd_type = CPUTYPE_CLASS;
|
|
|
720 desc.sd_objid = i;
|
|
|
721 desc.sd_addr = (char *) &stats;
|
|
|
722 desc.sd_size = sizeof stats;
|
|
|
723
|
|
|
724 if (inq_stats (1, &desc))
|
|
|
725 return -1;
|
|
|
726
|
|
|
727 c += stats.class_numcpus;
|
|
|
728 }
|
|
|
729 cpus = c;
|
|
|
730 samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
|
|
731 }
|
|
|
732
|
|
|
733 proc_info.sd_next = 0;
|
|
|
734 proc_info.sd_subsys = SUBSYS_PROC;
|
|
|
735 proc_info.sd_type = PROCTYPE_SUMMARY;
|
|
|
736 proc_info.sd_addr = (char *) &proc_sum_data;
|
|
|
737 proc_info.sd_size = sizeof (struct proc_summary);
|
|
|
738 proc_info.sd_sizeused = 0;
|
|
|
739
|
|
|
740 if (inq_stats (1, &proc_info) != 0)
|
|
|
741 return -1;
|
|
|
742
|
|
|
743 load = proc_sum_data.ps_nrunnable;
|
|
|
744 j = 0;
|
|
|
745 for (i = samples - 1; i > 0; --i)
|
|
|
746 {
|
|
|
747 load += proc_sum_data.ps_nrun[j];
|
|
|
748 if (j++ == PS_NRUNSIZE)
|
|
|
749 j = 0;
|
|
|
750 }
|
|
|
751
|
|
|
752 if (nelem > 0)
|
|
|
753 loadavg[elem++] = load / samples / cpus;
|
|
|
754 #endif /* UMAX */
|
|
|
755
|
|
|
756 #if !defined (LDAV_DONE) && defined (DGUX)
|
|
|
757 #define LDAV_DONE
|
|
|
758 /* This call can return -1 for an error, but with good args
|
|
|
759 it's not supposed to fail. The first argument is for no
|
|
|
760 apparent reason of type `long int *'. */
|
|
|
761 dg_sys_info ((long int *) &load_info,
|
|
|
762 DG_SYS_INFO_LOAD_INFO_TYPE,
|
|
|
763 DG_SYS_INFO_LOAD_VERSION_0);
|
|
|
764
|
|
|
765 if (nelem > 0)
|
|
|
766 loadavg[elem++] = load_info.one_minute;
|
|
|
767 if (nelem > 1)
|
|
|
768 loadavg[elem++] = load_info.five_minute;
|
|
|
769 if (nelem > 2)
|
|
|
770 loadavg[elem++] = load_info.fifteen_minute;
|
|
|
771 #endif /* DGUX */
|
|
|
772
|
|
|
773 #if !defined (LDAV_DONE) && defined (apollo)
|
|
|
774 #define LDAV_DONE
|
|
|
775 /* Apollo code from lisch@mentorg.com (Ray Lischner).
|
|
|
776
|
|
|
777 This system call is not documented. The load average is obtained as
|
|
|
778 three long integers, for the load average over the past minute,
|
|
|
779 five minutes, and fifteen minutes. Each value is a scaled integer,
|
|
|
780 with 16 bits of integer part and 16 bits of fraction part.
|
|
|
781
|
|
|
782 I'm not sure which operating system first supported this system call,
|
|
|
783 but I know that SR10.2 supports it. */
|
|
|
784
|
|
|
785 extern void proc1_$get_loadav ();
|
|
|
786 unsigned long load_ave[3];
|
|
|
787
|
|
|
788 proc1_$get_loadav (load_ave);
|
|
|
789
|
|
|
790 if (nelem > 0)
|
|
|
791 loadavg[elem++] = load_ave[0] / 65536.0;
|
|
|
792 if (nelem > 1)
|
|
|
793 loadavg[elem++] = load_ave[1] / 65536.0;
|
|
|
794 if (nelem > 2)
|
|
|
795 loadavg[elem++] = load_ave[2] / 65536.0;
|
|
|
796 #endif /* apollo */
|
|
|
797
|
|
|
798 #if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
|
|
799 #define LDAV_DONE
|
|
|
800
|
|
|
801 struct tbl_loadavg load_ave;
|
|
|
802 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
48
|
803 loadavg[elem++]
|
|
|
804 = (load_ave.tl_lscale == 0
|
|
|
805 ? load_ave.tl_avenrun.d[0]
|
|
|
806 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
|
|
0
|
807 #endif /* OSF_MIPS */
|
|
|
808
|
|
|
809 #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32))
|
|
|
810 #define LDAV_DONE
|
|
|
811
|
|
|
812 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
813 for ( ; elem < nelem; elem++)
|
|
|
814 {
|
|
|
815 loadavg[elem] = 0.0;
|
|
|
816 }
|
|
|
817 #endif /* MSDOS */
|
|
|
818
|
|
|
819 #if !defined (LDAV_DONE) && defined (OSF_ALPHA)
|
|
|
820 #define LDAV_DONE
|
|
|
821
|
|
|
822 struct tbl_loadavg load_ave;
|
|
|
823 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
824 for (elem = 0; elem < nelem; elem++)
|
|
|
825 loadavg[elem]
|
|
|
826 = (load_ave.tl_lscale == 0
|
|
|
827 ? load_ave.tl_avenrun.d[elem]
|
|
|
828 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
|
|
|
829 #endif /* OSF_ALPHA */
|
|
|
830
|
|
209
|
831 #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE)
|
|
0
|
832
|
|
|
833 /* UNIX-specific code -- read the average from /dev/kmem. */
|
|
|
834
|
|
|
835 #define LDAV_PRIVILEGED /* This code requires special installation. */
|
|
|
836
|
|
|
837 LOAD_AVE_TYPE load_ave[3];
|
|
|
838
|
|
|
839 /* Get the address of LDAV_SYMBOL. */
|
|
|
840 if (offset == 0)
|
|
|
841 {
|
|
|
842 #ifndef sgi
|
|
|
843 #ifndef NLIST_STRUCT
|
|
|
844 strcpy (nl[0].n_name, LDAV_SYMBOL);
|
|
|
845 strcpy (nl[1].n_name, "");
|
|
|
846 #else /* NLIST_STRUCT */
|
|
|
847 #ifdef NLIST_NAME_UNION
|
|
|
848 nl[0].n_un.n_name = LDAV_SYMBOL;
|
|
|
849 nl[1].n_un.n_name = 0;
|
|
|
850 #else /* not NLIST_NAME_UNION */
|
|
84
|
851 nl[0].n_name = (char *) LDAV_SYMBOL;
|
|
0
|
852 nl[1].n_name = 0;
|
|
|
853 #endif /* not NLIST_NAME_UNION */
|
|
|
854 #endif /* NLIST_STRUCT */
|
|
|
855
|
|
|
856 #ifndef SUNOS_5
|
|
|
857 if (
|
|
|
858 #if !(defined (_AIX) && !defined (ps2))
|
|
|
859 nlist (KERNEL_FILE, nl)
|
|
|
860 #else /* _AIX */
|
|
|
861 knlist (nl, 1, sizeof (nl[0]))
|
|
|
862 #endif
|
|
|
863 >= 0)
|
|
|
864 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
|
|
865 {
|
|
|
866 #ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
|
|
867 FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
|
|
868 #endif
|
|
|
869 offset = nl[0].n_value;
|
|
|
870 }
|
|
|
871 #endif /* !SUNOS_5 */
|
|
|
872 #else /* sgi */
|
|
|
873 int ldav_off;
|
|
|
874
|
|
|
875 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
|
|
876 if (ldav_off != -1)
|
|
|
877 offset = (long) ldav_off & 0x7fffffff;
|
|
|
878 #endif /* sgi */
|
|
|
879 }
|
|
|
880
|
|
|
881 /* Make sure we have /dev/kmem open. */
|
|
|
882 if (!getloadavg_initialized)
|
|
|
883 {
|
|
|
884 #ifndef SUNOS_5
|
|
|
885 channel = open ("/dev/kmem", 0);
|
|
|
886 if (channel >= 0)
|
|
|
887 {
|
|
|
888 /* Set the channel to close on exec, so it does not
|
|
|
889 litter any child's descriptor table. */
|
|
|
890 #ifdef FD_SETFD
|
|
|
891 #ifndef FD_CLOEXEC
|
|
|
892 #define FD_CLOEXEC 1
|
|
|
893 #endif
|
|
|
894 (void) fcntl (channel, F_SETFD, FD_CLOEXEC);
|
|
|
895 #endif
|
|
|
896 getloadavg_initialized = 1;
|
|
|
897 }
|
|
|
898 #else /* SUNOS_5 */
|
|
|
899 /* We pass 0 for the kernel, corefile, and swapfile names
|
|
|
900 to use the currently running kernel. */
|
|
|
901 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
|
|
902 if (kd != 0)
|
|
|
903 {
|
|
|
904 /* nlist the currently running kernel. */
|
|
|
905 kvm_nlist (kd, nl);
|
|
|
906 offset = nl[0].n_value;
|
|
|
907 getloadavg_initialized = 1;
|
|
|
908 }
|
|
|
909 #endif /* SUNOS_5 */
|
|
|
910 }
|
|
|
911
|
|
|
912 /* If we can, get the load average values. */
|
|
|
913 if (offset && getloadavg_initialized)
|
|
|
914 {
|
|
|
915 /* Try to read the load. */
|
|
|
916 #ifndef SUNOS_5
|
|
|
917 if (lseek (channel, offset, 0) == -1L
|
|
|
918 || read (channel, (char *) load_ave, sizeof (load_ave))
|
|
|
919 != sizeof (load_ave))
|
|
|
920 {
|
|
|
921 close (channel);
|
|
|
922 getloadavg_initialized = 0;
|
|
|
923 }
|
|
|
924 #else /* SUNOS_5 */
|
|
|
925 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
|
|
926 != sizeof (load_ave))
|
|
|
927 {
|
|
|
928 kvm_close (kd);
|
|
|
929 getloadavg_initialized = 0;
|
|
|
930 }
|
|
|
931 #endif /* SUNOS_5 */
|
|
|
932 }
|
|
|
933
|
|
|
934 if (offset == 0 || !getloadavg_initialized)
|
|
|
935 return -1;
|
|
|
936
|
|
|
937 if (nelem > 0)
|
|
|
938 loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
|
|
939 if (nelem > 1)
|
|
|
940 loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
|
|
941 if (nelem > 2)
|
|
|
942 loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
|
|
943
|
|
|
944 #define LDAV_DONE
|
|
|
945 #endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
|
|
946
|
|
|
947 return elem;
|
|
|
948 }
|
|
|
949
|
|
|
950 #endif /* ! HAVE_GETLOADAVG */
|
|
|
951
|
|
|
952 #ifdef TEST
|
|
|
953 void
|
|
84
|
954 main (int argc, char **argv)
|
|
0
|
955 {
|
|
|
956 int naptime = 0;
|
|
|
957
|
|
|
958 if (argc > 1)
|
|
|
959 naptime = atoi (argv[1]);
|
|
|
960
|
|
|
961 while (1)
|
|
|
962 {
|
|
|
963 double avg[3];
|
|
|
964 int loads;
|
|
|
965
|
|
|
966 errno = 0; /* Don't be misled if it doesn't set errno. */
|
|
|
967 loads = getloadavg (avg, 3);
|
|
|
968 if (loads == -1)
|
|
|
969 {
|
|
|
970 perror ("Error getting load average");
|
|
|
971 exit (1);
|
|
|
972 }
|
|
|
973 if (loads > 0)
|
|
|
974 printf ("1-minute: %f ", avg[0]);
|
|
|
975 if (loads > 1)
|
|
|
976 printf ("5-minute: %f ", avg[1]);
|
|
|
977 if (loads > 2)
|
|
|
978 printf ("15-minute: %f ", avg[2]);
|
|
|
979 if (loads > 0)
|
|
|
980 putchar ('\n');
|
|
|
981
|
|
|
982 if (naptime == 0)
|
|
|
983 break;
|
|
|
984 sleep (naptime);
|
|
|
985 }
|
|
|
986
|
|
|
987 exit (0);
|
|
|
988 }
|
|
|
989 #endif /* TEST */
|
|
231
|
990
|
|
|
991 #else
|
|
|
992
|
|
|
993 /* Emulate getloadavg. */
|
|
|
994 int
|
|
|
995 getloadavg (double loadavg[], int nelem)
|
|
|
996 {
|
|
|
997 int i;
|
|
|
998
|
|
|
999 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
1000 for (i = 0; i < nelem; i++)
|
|
|
1001 {
|
|
|
1002 loadavg[i] = 0.0;
|
|
|
1003 }
|
|
|
1004 return i;
|
|
|
1005 }
|
|
|
1006
|
|
|
1007 #endif /*__GNUWIN32__*/
|
|
|
1008
|
