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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 /* Compile-time symbols that this file uses:
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23
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24 FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
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25 KERNEL_FILE Pathname of the kernel to nlist.
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26 LDAV_CVT() Scale the load average from the kernel.
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27 Returns a double.
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28 LDAV_SYMBOL Name of kernel symbol giving load average.
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29 LOAD_AVE_TYPE Type of the load average array in the kernel.
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30 Must be defined unless one of
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31 apollo, DGUX, NeXT, or UMAX is defined;
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32 otherwise, no load average is available.
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33 NLIST_STRUCT Include nlist.h, not a.out.h, and
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34 the nlist n_name element is a pointer,
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35 not an array.
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36 NLIST_NAME_UNION struct nlist has an n_un member, not n_name.
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37 LINUX_LDAV_FILE [__linux__]: File containing load averages.
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38
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39 Specific system predefines this file uses, aside from setting
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40 default values if not emacs:
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41
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42 apollo
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43 BSD Real BSD, not just BSD-like.
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44 convex
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45 DGUX
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46 hpux
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412
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47 MSDOS No-op for MSDOS.
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0
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48 NeXT
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49 sgi
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50 sequent Sequent Dynix 3.x.x (BSD)
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51 _SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
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52 sony_news NEWS-OS (works at least for 4.1C)
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53 UMAX
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54 UMAX4_3
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412
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55 WIN32 No-op for Windows95/NT.
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0
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56 __linux__ Linux: assumes /proc filesystem mounted.
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57 Support from Michael K. Johnson.
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58 __NetBSD__ NetBSD: assumes /kern filesystem mounted.
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380
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59 __OpenBSD__ OpenBSD: ditto.
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0
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60
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61 In addition, to avoid nesting many #ifdefs, we internally set
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62 LDAV_DONE to indicate that the load average has been computed.
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63
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64 We also #define LDAV_PRIVILEGED if a program will require
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65 special installation to be able to call getloadavg. */
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66
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67 /* This should always be first. */
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68 #ifdef HAVE_CONFIG_H
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69 #include <config.h>
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70 #endif
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71
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412
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72 #ifndef WINDOWSNT
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73 #ifndef __CYGWIN32__
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398
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74
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0
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75 #include <sys/types.h>
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76
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77 /* Both the Emacs and non-Emacs sections want this. Some
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78 configuration files' definitions for the LOAD_AVE_CVT macro (like
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79 sparc.h's) use macros like FSCALE, defined here. */
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80 #ifdef unix
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81 #include <sys/param.h>
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82 #endif
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83
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412
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84 #ifdef XEMACS
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85 #include "lisp.h"
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86 #include "sysfile.h" /* for encapsulated open, close, read, write */
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87 #endif /* XEMACS */
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0
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88
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89 /* Exclude all the code except the test program at the end
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90 if the system has its own `getloadavg' function.
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91
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92 The declaration of `errno' is needed by the test program
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93 as well as the function itself, so it comes first. */
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94
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95 #include <errno.h>
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96
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412
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97 #ifndef errno
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98 extern int errno;
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99 #endif
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100
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0
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101 #ifndef HAVE_GETLOADAVG
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102
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103 /* The existing Emacs configuration files define a macro called
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104 LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
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105 returns the load average multiplied by 100. What we actually want
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106 is a macro called LDAV_CVT, which returns the load average as an
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107 unmultiplied double.
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108
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109 For backwards compatibility, we'll define LDAV_CVT in terms of
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110 LOAD_AVE_CVT, but future machine config files should just define
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111 LDAV_CVT directly. */
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112
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113 #if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
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114 #define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
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115 #endif
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116
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412
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117 #ifdef XEMACS
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48
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118 #if defined (HAVE_KSTAT_H)
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119 #include <kstat.h>
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120 #endif /* HAVE_KSTAT_H */
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412
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121 #endif /* XEMACS */
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48
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122
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0
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123 #if !defined (BSD) && defined (ultrix)
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124 /* Ultrix behaves like BSD on Vaxen. */
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125 #define BSD
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126 #endif
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127
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128 #ifdef NeXT
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129 /* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
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130 conflicts with the definition understood in this file, that this
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131 really is BSD. */
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132 #undef BSD
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133
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134 /* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
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135 defined to mean that the nlist method should be used, which is not true. */
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136 #undef FSCALE
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137 #endif
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138
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139 /* Set values that are different from the defaults, which are
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140 set a little farther down with #ifndef. */
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141
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142
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143 /* Some shorthands. */
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144
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145 #if defined (HPUX) && !defined (hpux)
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146 #define hpux
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147 #endif
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148
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149 #if defined(hp300) && !defined(hpux)
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150 #define MORE_BSD
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151 #endif
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152
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153 #if defined(ultrix) && defined(mips)
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154 #define decstation
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155 #endif
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156
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48
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157 #if (defined(sun) && defined(SVR4)) || defined (SOLARIS2)
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0
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158 #define SUNOS_5
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159 #endif
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160
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161 #if defined (__osf__) && (defined (__alpha) || defined (__alpha__))
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162 #define OSF_ALPHA
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151
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163 #include <netdb.h>
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164 #include <netinet/in.h> /* Needed for Digital UNIX V3 */
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165 #include <net/proto_net.h>
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0
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166 #include <sys/table.h>
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167 #endif
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168
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169 #if defined (__osf__) && (defined (mips) || defined (__mips__))
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170 #define OSF_MIPS
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171 #include <sys/table.h>
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172 #endif
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173
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174 /* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
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175 default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
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176 that with a couple of other things and we'll have a unique match. */
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177 #if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
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178 #define tek4300 /* Define by emacs, but not by other users. */
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179 #endif
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180
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181
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182 /* VAX C can't handle multi-line #ifs, or lines longer than 256 chars. */
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183 #ifndef LOAD_AVE_TYPE
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184
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185 #ifdef MORE_BSD
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186 #define LOAD_AVE_TYPE long
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187 #endif
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188
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189 #ifdef sun
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190 #define LOAD_AVE_TYPE long
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191 #endif
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192
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193 #ifdef decstation
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194 #define LOAD_AVE_TYPE long
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195 #endif
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196
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197 #ifdef _SEQUENT_
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198 #define LOAD_AVE_TYPE long
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199 #endif
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200
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201 #ifdef sgi
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202 #define LOAD_AVE_TYPE long
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203 #endif
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204
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205 #ifdef SVR4
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206 #define LOAD_AVE_TYPE long
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207 #endif
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208
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209 #ifdef sony_news
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210 #define LOAD_AVE_TYPE long
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211 #endif
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212
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213 #ifdef sequent
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214 #define LOAD_AVE_TYPE long
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215 #endif
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216
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217 #ifdef OSF_ALPHA
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218 #define LOAD_AVE_TYPE long
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219 #endif
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220
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221 #if defined (ardent) && defined (titan)
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222 #define LOAD_AVE_TYPE long
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223 #endif
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224
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225 #ifdef tek4300
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226 #define LOAD_AVE_TYPE long
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227 #endif
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228
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229 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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230 #define LOAD_AVE_TYPE long
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231 #endif
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232
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233 #ifdef _AIX
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234 #define LOAD_AVE_TYPE long
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235 #endif
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236
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237 #ifdef convex
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238 #define LOAD_AVE_TYPE double
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239 #ifndef LDAV_CVT
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240 #define LDAV_CVT(n) (n)
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241 #endif
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242 #endif
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243
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244 #endif /* No LOAD_AVE_TYPE. */
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245
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246 #ifdef OSF_ALPHA
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247 /* <sys/param.h> defines an incorrect value for FSCALE on Alpha OSF/1,
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248 according to ghazi@noc.rutgers.edu. */
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249 #undef FSCALE
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250 #define FSCALE 1024.0
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251 #endif
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252
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253 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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254 /* <sys/param.h> defines an incorrect value for FSCALE on an
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255 Alliant FX/2800 Concentrix 2.2, according to ghazi@noc.rutgers.edu. */
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256 #undef FSCALE
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257 #define FSCALE 100.0
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258 #endif
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259
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260
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261 #ifndef FSCALE
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262
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263 /* SunOS and some others define FSCALE in sys/param.h. */
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264
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265 #ifdef MORE_BSD
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266 #define FSCALE 2048.0
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267 #endif
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268
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269 #if defined(MIPS) || defined(SVR4) || defined(decstation)
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270 #define FSCALE 256
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271 #endif
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272
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273 #if defined (sgi) || defined (sequent)
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274 /* Sometimes both MIPS and sgi are defined, so FSCALE was just defined
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275 above under #ifdef MIPS. But we want the sgi value. */
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276 #undef FSCALE
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277 #define FSCALE 1000.0
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278 #endif
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279
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280 #if defined (ardent) && defined (titan)
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281 #define FSCALE 65536.0
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282 #endif
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283
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284 #ifdef tek4300
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285 #define FSCALE 100.0
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286 #endif
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287
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288 #ifdef _AIX
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289 #define FSCALE 65536.0
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290 #endif
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291
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292 #endif /* Not FSCALE. */
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293
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294 #if !defined (LDAV_CVT) && defined (FSCALE)
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295 #define LDAV_CVT(n) (((double) (n)) / FSCALE)
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296 #endif
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297
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298 /* VAX C can't handle multi-line #ifs, or lines longer that 256 characters. */
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299 #ifndef NLIST_STRUCT
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300
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301 #ifdef MORE_BSD
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302 #define NLIST_STRUCT
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303 #endif
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304
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305 #ifdef sun
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306 #define NLIST_STRUCT
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307 #endif
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308
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309 #ifdef decstation
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310 #define NLIST_STRUCT
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311 #endif
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312
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313 #ifdef hpux
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314 #define NLIST_STRUCT
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315 #endif
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316
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317 #if defined (_SEQUENT_) || defined (sequent)
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318 #define NLIST_STRUCT
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319 #endif
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320
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321 #ifdef sgi
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322 #define NLIST_STRUCT
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323 #endif
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324
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325 #ifdef SVR4
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326 #define NLIST_STRUCT
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327 #endif
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328
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329 #ifdef sony_news
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330 #define NLIST_STRUCT
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331 #endif
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332
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333 #ifdef OSF_ALPHA
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334 #define NLIST_STRUCT
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335 #endif
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336
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337 #if defined (ardent) && defined (titan)
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338 #define NLIST_STRUCT
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339 #endif
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340
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341 #ifdef tek4300
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342 #define NLIST_STRUCT
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343 #endif
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344
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345 #ifdef butterfly
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346 #define NLIST_STRUCT
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347 #endif
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348
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349 #if defined(alliant) && defined(i860) /* Alliant FX/2800 */
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350 #define NLIST_STRUCT
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351 #endif
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352
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353 #ifdef _AIX
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354 #define NLIST_STRUCT
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355 #endif
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356
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357 #endif /* defined (NLIST_STRUCT) */
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358
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359
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360 #if defined(sgi) || (defined(mips) && !defined(BSD))
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361 #define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
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362 #endif
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363
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364
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365 #if !defined (KERNEL_FILE) && defined (sequent)
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366 #define KERNEL_FILE "/dynix"
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367 #endif
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368
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369 #if !defined (KERNEL_FILE) && defined (hpux)
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370 #define KERNEL_FILE "/hp-ux"
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371 #endif
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372
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373 #if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
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374 #define KERNEL_FILE "/unix"
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375 #endif
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376
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377
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378 #if !defined (LDAV_SYMBOL) && defined (alliant)
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379 #define LDAV_SYMBOL "_Loadavg"
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380 #endif
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381
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382 #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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383 #define LDAV_SYMBOL "avenrun"
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384 #endif
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385
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48
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386 #ifdef HAVE_UNISTD_H
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0
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387 #include <unistd.h>
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48
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388 #endif
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0
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389
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390 #include <stdio.h>
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391
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392 /* LOAD_AVE_TYPE should only get defined if we're going to use the
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393 nlist method. */
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394 #if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
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395 #define LOAD_AVE_TYPE double
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396 #endif
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397
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398 #ifdef LOAD_AVE_TYPE
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399
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400 #ifndef NLIST_STRUCT
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401 #include <a.out.h>
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402 #else /* NLIST_STRUCT */
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403 #include <nlist.h>
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404 #endif /* NLIST_STRUCT */
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405
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406 #ifdef SUNOS_5
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407 #include <fcntl.h>
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408 #include <kvm.h>
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409 #endif
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410
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411 #ifndef KERNEL_FILE
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412 #define KERNEL_FILE "/vmunix"
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413 #endif /* KERNEL_FILE */
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414
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415 #ifndef LDAV_SYMBOL
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416 #define LDAV_SYMBOL "_avenrun"
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417 #endif /* LDAV_SYMBOL */
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418
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419 #ifndef LDAV_CVT
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420 #define LDAV_CVT(n) ((double) (n))
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421 #endif /* !LDAV_CVT */
|
|
|
422
|
|
|
423 #endif /* LOAD_AVE_TYPE */
|
|
|
424
|
|
|
425 #ifdef NeXT
|
|
|
426 #ifdef HAVE_MACH_MACH_H
|
|
|
427 #include <mach/mach.h>
|
|
|
428 #else
|
|
|
429 #include <mach.h>
|
|
|
430 #endif
|
|
|
431 #endif /* NeXT */
|
|
|
432
|
|
|
433 #ifdef sgi
|
|
|
434 #include <sys/sysmp.h>
|
|
|
435 #endif /* sgi */
|
|
|
436
|
|
|
437 #ifdef UMAX
|
|
|
438 #include <stdio.h>
|
|
|
439 #include <signal.h>
|
|
|
440 #include <sys/time.h>
|
|
|
441 #include <sys/wait.h>
|
|
|
442 #include <sys/syscall.h>
|
|
|
443
|
|
|
444 #ifdef UMAX_43
|
|
|
445 #include <machine/cpu.h>
|
|
|
446 #include <inq_stats/statistics.h>
|
|
|
447 #include <inq_stats/sysstats.h>
|
|
|
448 #include <inq_stats/cpustats.h>
|
|
|
449 #include <inq_stats/procstats.h>
|
|
|
450 #else /* Not UMAX_43. */
|
|
|
451 #include <sys/sysdefs.h>
|
|
|
452 #include <sys/statistics.h>
|
|
|
453 #include <sys/sysstats.h>
|
|
|
454 #include <sys/cpudefs.h>
|
|
|
455 #include <sys/cpustats.h>
|
|
|
456 #include <sys/procstats.h>
|
|
|
457 #endif /* Not UMAX_43. */
|
|
|
458 #endif /* UMAX */
|
|
|
459
|
|
|
460 #ifdef DGUX
|
|
|
461 #include <sys/dg_sys_info.h>
|
|
|
462 #endif
|
|
|
463
|
|
412
|
464 #ifdef XEMACS
|
|
48
|
465 #if defined (HAVE_SYS_PSTAT_H)
|
|
0
|
466 #include <sys/pstat.h>
|
|
48
|
467 #endif /* HAVE_SYS_PSTAT_H (on HPUX) */
|
|
412
|
468 #endif /* XEMACS */
|
|
0
|
469
|
|
|
470 #if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
|
|
|
471 #include <fcntl.h>
|
|
|
472 #else
|
|
|
473 #include <sys/file.h>
|
|
|
474 #endif
|
|
|
475
|
|
|
476 /* Avoid static vars inside a function since in HPUX they dump as pure. */
|
|
|
477
|
|
|
478 #ifdef NeXT
|
|
|
479 static processor_set_t default_set;
|
|
|
480 static int getloadavg_initialized;
|
|
|
481 #endif /* NeXT */
|
|
|
482
|
|
|
483 #ifdef UMAX
|
|
|
484 static unsigned int cpus = 0;
|
|
|
485 static unsigned int samples;
|
|
|
486 #endif /* UMAX */
|
|
|
487
|
|
|
488 #ifdef DGUX
|
|
|
489 static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
|
|
|
490 #endif /* DGUX */
|
|
|
491
|
|
|
492 #ifdef LOAD_AVE_TYPE
|
|
209
|
493 /* File descriptor open to /dev/kmem */
|
|
0
|
494 static int channel;
|
|
|
495 /* Nonzero iff channel is valid. */
|
|
|
496 static int getloadavg_initialized;
|
|
|
497 /* Offset in kmem to seek to read load average, or 0 means invalid. */
|
|
|
498 static long offset;
|
|
|
499
|
|
209
|
500 #ifndef sgi
|
|
0
|
501 static struct nlist nl[2];
|
|
209
|
502 #endif /* not sgi */
|
|
0
|
503
|
|
|
504 #ifdef SUNOS_5
|
|
|
505 static kvm_t *kd;
|
|
|
506 #endif /* SUNOS_5 */
|
|
|
507
|
|
278
|
508 #ifndef countof
|
|
|
509 # define countof(x) (sizeof (x) / sizeof (*(x)))
|
|
|
510 #endif
|
|
|
511
|
|
0
|
512 #endif /* LOAD_AVE_TYPE */
|
|
|
513
|
|
|
514 /* Put the 1 minute, 5 minute and 15 minute load averages
|
|
|
515 into the first NELEM elements of LOADAVG.
|
|
|
516 Return the number written (never more than 3, but may be less than NELEM),
|
|
|
517 or -1 if an error occurred. */
|
|
|
518
|
|
|
519 int
|
|
84
|
520 getloadavg (double loadavg[], int nelem)
|
|
0
|
521 {
|
|
|
522 int elem = 0; /* Return value. */
|
|
|
523
|
|
|
524 #ifdef NO_GET_LOAD_AVG
|
|
|
525 #define LDAV_DONE
|
|
|
526 /* Set errno to zero to indicate that there was no particular error;
|
|
|
527 this function just can't work at all on this system. */
|
|
|
528 errno = 0;
|
|
278
|
529 elem = -2;
|
|
280
|
530 #endif /* NO_GET_LOAD_AVG */
|
|
0
|
531
|
|
48
|
532 #if ! defined (LDAV_DONE) && defined (HAVE_KSTAT_H) && defined (HAVE_LIBKSTAT)
|
|
|
533 #define LDAV_DONE
|
|
278
|
534 /* getloadavg is best implemented using kstat (kernel stats), on
|
|
|
535 systems (like SunOS5) that support it, since you don't need special
|
|
|
536 privileges to use it.
|
|
185
|
537
|
|
278
|
538 Initial implementation courtesy Zlatko Calusic <zcalusic@carnet.hr>.
|
|
412
|
539 Integrated to XEmacs by Hrvoje Niksic <hniksic@srce.hr>.
|
|
278
|
540 Additional cleanup by Hrvoje Niksic, based on code published by
|
|
|
541 Casper Dik <Casper.Dik@Holland.Sun.Com>. */
|
|
|
542 kstat_ctl_t *kc;
|
|
|
543 kstat_t *ksp;
|
|
|
544 static char *avestrings[] = { "avenrun_1min",
|
|
|
545 "avenrun_5min",
|
|
|
546 "avenrun_15min" };
|
|
48
|
547
|
|
278
|
548 if (nelem > countof (avestrings))
|
|
|
549 nelem = countof (avestrings);
|
|
|
550
|
|
280
|
551 kc = kstat_open ();
|
|
278
|
552 if (!kc)
|
|
|
553 return -1;
|
|
|
554 ksp = kstat_lookup (kc, "unix", 0, "system_misc");
|
|
|
555 if (!ksp)
|
|
48
|
556 {
|
|
278
|
557 kstat_close (kc);
|
|
|
558 return -1;
|
|
48
|
559 }
|
|
278
|
560 if (kstat_read (kc, ksp, 0) < 0)
|
|
|
561 {
|
|
|
562 kstat_close (kc);
|
|
48
|
563 return -1;
|
|
278
|
564 }
|
|
48
|
565 for (elem = 0; elem < nelem; elem++)
|
|
278
|
566 {
|
|
380
|
567 kstat_named_t *kn =
|
|
|
568 (kstat_named_t *) kstat_data_lookup (ksp, avestrings[elem]);
|
|
278
|
569 if (!kn)
|
|
|
570 {
|
|
|
571 kstat_close (kc);
|
|
|
572 return -1;
|
|
|
573 }
|
|
280
|
574 loadavg[elem] = (double)kn->value.ul / FSCALE;
|
|
278
|
575 }
|
|
|
576 kstat_close (kc);
|
|
48
|
577 #endif /* HAVE_KSTAT_H && HAVE_LIBKSTAT */
|
|
82
|
578
|
|
|
579 #if !defined (LDAV_DONE) && defined (HAVE_SYS_PSTAT_H)
|
|
|
580 #define LDAV_DONE
|
|
|
581 /* This is totally undocumented, and is not guaranteed to work, but
|
|
|
582 mayhap it might .... If it does work, it will work only on HP-UX
|
|
|
583 8.0 or later. -- Darryl Okahata <darrylo@sr.hp.com> */
|
|
|
584 #undef LOAD_AVE_TYPE /* Make sure these don't exist. */
|
|
|
585 #undef LOAD_AVE_CVT
|
|
|
586 #undef LDAV_SYMBOL
|
|
|
587 struct pst_dynamic procinfo;
|
|
|
588 union pstun statbuf;
|
|
|
589
|
|
|
590 statbuf.pst_dynamic = &procinfo;
|
|
|
591 if (pstat (PSTAT_DYNAMIC, statbuf, sizeof (struct pst_dynamic), 0, 0) == -1)
|
|
|
592 return (-1);
|
|
|
593 loadavg[elem++] = procinfo.psd_avg_1_min;
|
|
|
594 loadavg[elem++] = procinfo.psd_avg_5_min;
|
|
|
595 loadavg[elem++] = procinfo.psd_avg_15_min;
|
|
|
596 #endif /* HPUX */
|
|
|
597
|
|
0
|
598 #if !defined (LDAV_DONE) && defined (__linux__)
|
|
|
599 #define LDAV_DONE
|
|
|
600 #undef LOAD_AVE_TYPE
|
|
|
601
|
|
|
602 #ifndef LINUX_LDAV_FILE
|
|
|
603 #define LINUX_LDAV_FILE "/proc/loadavg"
|
|
|
604 #endif
|
|
|
605
|
|
|
606 char ldavgbuf[40];
|
|
|
607 double load_ave[3];
|
|
|
608 int fd, count;
|
|
|
609
|
|
|
610 fd = open (LINUX_LDAV_FILE, O_RDONLY);
|
|
|
611 if (fd == -1)
|
|
|
612 return -1;
|
|
|
613 count = read (fd, ldavgbuf, 40);
|
|
|
614 (void) close (fd);
|
|
|
615 if (count <= 0)
|
|
|
616 return -1;
|
|
|
617
|
|
|
618 count = sscanf (ldavgbuf, "%lf %lf %lf",
|
|
|
619 &load_ave[0], &load_ave[1], &load_ave[2]);
|
|
|
620 if (count < 1)
|
|
|
621 return -1;
|
|
|
622
|
|
|
623 for (elem = 0; elem < nelem && elem < count; elem++)
|
|
|
624 loadavg[elem] = load_ave[elem];
|
|
|
625 #endif /* __linux__ */
|
|
|
626
|
|
286
|
627 #if !defined (LDAV_DONE) && defined (__NetBSD__) || defined (__OpenBSD__)
|
|
0
|
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;
|
|
286
|
651 #endif /* __NetBSD__ or __OpenBSD__ */
|
|
0
|
652
|
|
|
653 #if !defined (LDAV_DONE) && defined (NeXT)
|
|
|
654 #define LDAV_DONE
|
|
|
655 /* The NeXT code was adapted from iscreen 3.2. */
|
|
|
656
|
|
|
657 host_t host;
|
|
|
658 struct processor_set_basic_info info;
|
|
|
659 unsigned info_count;
|
|
|
660
|
|
48
|
661 /* We only know how to get the 1-minute average for this system,
|
|
|
662 so even if the caller asks for more than 1, we only return 1. */
|
|
0
|
663
|
|
|
664 if (!getloadavg_initialized)
|
|
|
665 {
|
|
|
666 if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
|
|
|
667 getloadavg_initialized = 1;
|
|
|
668 }
|
|
|
669
|
|
|
670 if (getloadavg_initialized)
|
|
|
671 {
|
|
|
672 info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
|
|
|
673 if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
|
|
|
674 (processor_set_info_t) &info, &info_count)
|
|
|
675 != KERN_SUCCESS)
|
|
|
676 getloadavg_initialized = 0;
|
|
|
677 else
|
|
|
678 {
|
|
|
679 if (nelem > 0)
|
|
|
680 loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
|
|
681 }
|
|
|
682 }
|
|
|
683
|
|
|
684 if (!getloadavg_initialized)
|
|
|
685 return -1;
|
|
|
686 #endif /* NeXT */
|
|
|
687
|
|
|
688 #if !defined (LDAV_DONE) && defined (UMAX)
|
|
|
689 #define LDAV_DONE
|
|
|
690 /* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
|
|
|
691 have a /dev/kmem. Information about the workings of the running kernel
|
|
|
692 can be gathered with inq_stats system calls.
|
|
|
693 We only know how to get the 1-minute average for this system. */
|
|
|
694
|
|
|
695 struct proc_summary proc_sum_data;
|
|
|
696 struct stat_descr proc_info;
|
|
|
697 double load;
|
|
203
|
698 REGISTER unsigned int i, j;
|
|
0
|
699
|
|
|
700 if (cpus == 0)
|
|
|
701 {
|
|
203
|
702 REGISTER unsigned int c, i;
|
|
0
|
703 struct cpu_config conf;
|
|
|
704 struct stat_descr desc;
|
|
|
705
|
|
|
706 desc.sd_next = 0;
|
|
|
707 desc.sd_subsys = SUBSYS_CPU;
|
|
|
708 desc.sd_type = CPUTYPE_CONFIG;
|
|
|
709 desc.sd_addr = (char *) &conf;
|
|
|
710 desc.sd_size = sizeof conf;
|
|
|
711
|
|
|
712 if (inq_stats (1, &desc))
|
|
|
713 return -1;
|
|
|
714
|
|
|
715 c = 0;
|
|
|
716 for (i = 0; i < conf.config_maxclass; ++i)
|
|
|
717 {
|
|
|
718 struct class_stats stats;
|
|
282
|
719 memset ((char *) &stats, 0, sizeof stats);
|
|
0
|
720
|
|
|
721 desc.sd_type = CPUTYPE_CLASS;
|
|
|
722 desc.sd_objid = i;
|
|
|
723 desc.sd_addr = (char *) &stats;
|
|
|
724 desc.sd_size = sizeof stats;
|
|
|
725
|
|
|
726 if (inq_stats (1, &desc))
|
|
|
727 return -1;
|
|
|
728
|
|
|
729 c += stats.class_numcpus;
|
|
|
730 }
|
|
|
731 cpus = c;
|
|
|
732 samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
|
|
733 }
|
|
|
734
|
|
|
735 proc_info.sd_next = 0;
|
|
|
736 proc_info.sd_subsys = SUBSYS_PROC;
|
|
|
737 proc_info.sd_type = PROCTYPE_SUMMARY;
|
|
|
738 proc_info.sd_addr = (char *) &proc_sum_data;
|
|
|
739 proc_info.sd_size = sizeof (struct proc_summary);
|
|
|
740 proc_info.sd_sizeused = 0;
|
|
|
741
|
|
|
742 if (inq_stats (1, &proc_info) != 0)
|
|
|
743 return -1;
|
|
|
744
|
|
|
745 load = proc_sum_data.ps_nrunnable;
|
|
|
746 j = 0;
|
|
|
747 for (i = samples - 1; i > 0; --i)
|
|
|
748 {
|
|
|
749 load += proc_sum_data.ps_nrun[j];
|
|
|
750 if (j++ == PS_NRUNSIZE)
|
|
|
751 j = 0;
|
|
|
752 }
|
|
|
753
|
|
|
754 if (nelem > 0)
|
|
|
755 loadavg[elem++] = load / samples / cpus;
|
|
|
756 #endif /* UMAX */
|
|
|
757
|
|
|
758 #if !defined (LDAV_DONE) && defined (DGUX)
|
|
|
759 #define LDAV_DONE
|
|
|
760 /* This call can return -1 for an error, but with good args
|
|
|
761 it's not supposed to fail. The first argument is for no
|
|
|
762 apparent reason of type `long int *'. */
|
|
|
763 dg_sys_info ((long int *) &load_info,
|
|
|
764 DG_SYS_INFO_LOAD_INFO_TYPE,
|
|
|
765 DG_SYS_INFO_LOAD_VERSION_0);
|
|
|
766
|
|
|
767 if (nelem > 0)
|
|
|
768 loadavg[elem++] = load_info.one_minute;
|
|
|
769 if (nelem > 1)
|
|
|
770 loadavg[elem++] = load_info.five_minute;
|
|
|
771 if (nelem > 2)
|
|
|
772 loadavg[elem++] = load_info.fifteen_minute;
|
|
|
773 #endif /* DGUX */
|
|
|
774
|
|
412
|
775 #if !defined (LDAV_DONE) && defined (apollo)
|
|
|
776 #define LDAV_DONE
|
|
|
777 /* Apollo code from lisch@mentorg.com (Ray Lischner).
|
|
|
778
|
|
|
779 This system call is not documented. The load average is obtained as
|
|
|
780 three long integers, for the load average over the past minute,
|
|
|
781 five minutes, and fifteen minutes. Each value is a scaled integer,
|
|
|
782 with 16 bits of integer part and 16 bits of fraction part.
|
|
|
783
|
|
|
784 I'm not sure which operating system first supported this system call,
|
|
|
785 but I know that SR10.2 supports it. */
|
|
|
786
|
|
|
787 extern void proc1_$get_loadav ();
|
|
|
788 unsigned long load_ave[3];
|
|
|
789
|
|
|
790 proc1_$get_loadav (load_ave);
|
|
|
791
|
|
|
792 if (nelem > 0)
|
|
|
793 loadavg[elem++] = load_ave[0] / 65536.0;
|
|
|
794 if (nelem > 1)
|
|
|
795 loadavg[elem++] = load_ave[1] / 65536.0;
|
|
|
796 if (nelem > 2)
|
|
|
797 loadavg[elem++] = load_ave[2] / 65536.0;
|
|
|
798 #endif /* apollo */
|
|
|
799
|
|
0
|
800 #if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
|
|
801 #define LDAV_DONE
|
|
|
802
|
|
|
803 struct tbl_loadavg load_ave;
|
|
|
804 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
48
|
805 loadavg[elem++]
|
|
|
806 = (load_ave.tl_lscale == 0
|
|
|
807 ? load_ave.tl_avenrun.d[0]
|
|
|
808 : (load_ave.tl_avenrun.l[0] / (double) load_ave.tl_lscale));
|
|
0
|
809 #endif /* OSF_MIPS */
|
|
|
810
|
|
412
|
811 #if !defined (LDAV_DONE) && (defined (MSDOS) || defined (WIN32))
|
|
0
|
812 #define LDAV_DONE
|
|
|
813
|
|
|
814 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
815 for ( ; elem < nelem; elem++)
|
|
|
816 {
|
|
|
817 loadavg[elem] = 0.0;
|
|
|
818 }
|
|
412
|
819 #endif /* MSDOS */
|
|
0
|
820
|
|
|
821 #if !defined (LDAV_DONE) && defined (OSF_ALPHA)
|
|
|
822 #define LDAV_DONE
|
|
|
823
|
|
|
824 struct tbl_loadavg load_ave;
|
|
|
825 table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
|
|
826 for (elem = 0; elem < nelem; elem++)
|
|
|
827 loadavg[elem]
|
|
|
828 = (load_ave.tl_lscale == 0
|
|
|
829 ? load_ave.tl_avenrun.d[elem]
|
|
|
830 : (load_ave.tl_avenrun.l[elem] / (double) load_ave.tl_lscale));
|
|
|
831 #endif /* OSF_ALPHA */
|
|
|
832
|
|
209
|
833 #if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE)
|
|
0
|
834
|
|
|
835 /* UNIX-specific code -- read the average from /dev/kmem. */
|
|
|
836
|
|
|
837 #define LDAV_PRIVILEGED /* This code requires special installation. */
|
|
|
838
|
|
|
839 LOAD_AVE_TYPE load_ave[3];
|
|
|
840
|
|
|
841 /* Get the address of LDAV_SYMBOL. */
|
|
|
842 if (offset == 0)
|
|
|
843 {
|
|
|
844 #ifndef sgi
|
|
|
845 #ifndef NLIST_STRUCT
|
|
|
846 strcpy (nl[0].n_name, LDAV_SYMBOL);
|
|
|
847 strcpy (nl[1].n_name, "");
|
|
|
848 #else /* NLIST_STRUCT */
|
|
|
849 #ifdef NLIST_NAME_UNION
|
|
|
850 nl[0].n_un.n_name = LDAV_SYMBOL;
|
|
|
851 nl[1].n_un.n_name = 0;
|
|
|
852 #else /* not NLIST_NAME_UNION */
|
|
84
|
853 nl[0].n_name = (char *) LDAV_SYMBOL;
|
|
0
|
854 nl[1].n_name = 0;
|
|
|
855 #endif /* not NLIST_NAME_UNION */
|
|
|
856 #endif /* NLIST_STRUCT */
|
|
|
857
|
|
|
858 #ifndef SUNOS_5
|
|
|
859 if (
|
|
|
860 #if !(defined (_AIX) && !defined (ps2))
|
|
|
861 nlist (KERNEL_FILE, nl)
|
|
|
862 #else /* _AIX */
|
|
|
863 knlist (nl, 1, sizeof (nl[0]))
|
|
|
864 #endif
|
|
|
865 >= 0)
|
|
|
866 /* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
|
|
867 {
|
|
|
868 #ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
|
|
869 FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
|
|
870 #endif
|
|
|
871 offset = nl[0].n_value;
|
|
|
872 }
|
|
|
873 #endif /* !SUNOS_5 */
|
|
|
874 #else /* sgi */
|
|
|
875 int ldav_off;
|
|
|
876
|
|
|
877 ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
|
|
878 if (ldav_off != -1)
|
|
|
879 offset = (long) ldav_off & 0x7fffffff;
|
|
|
880 #endif /* sgi */
|
|
|
881 }
|
|
|
882
|
|
|
883 /* Make sure we have /dev/kmem open. */
|
|
|
884 if (!getloadavg_initialized)
|
|
|
885 {
|
|
|
886 #ifndef SUNOS_5
|
|
|
887 channel = open ("/dev/kmem", 0);
|
|
|
888 if (channel >= 0)
|
|
|
889 {
|
|
|
890 /* Set the channel to close on exec, so it does not
|
|
|
891 litter any child's descriptor table. */
|
|
|
892 #ifdef FD_SETFD
|
|
|
893 #ifndef FD_CLOEXEC
|
|
|
894 #define FD_CLOEXEC 1
|
|
|
895 #endif
|
|
|
896 (void) fcntl (channel, F_SETFD, FD_CLOEXEC);
|
|
|
897 #endif
|
|
|
898 getloadavg_initialized = 1;
|
|
|
899 }
|
|
|
900 #else /* SUNOS_5 */
|
|
|
901 /* We pass 0 for the kernel, corefile, and swapfile names
|
|
|
902 to use the currently running kernel. */
|
|
|
903 kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
|
|
904 if (kd != 0)
|
|
|
905 {
|
|
|
906 /* nlist the currently running kernel. */
|
|
|
907 kvm_nlist (kd, nl);
|
|
|
908 offset = nl[0].n_value;
|
|
|
909 getloadavg_initialized = 1;
|
|
|
910 }
|
|
|
911 #endif /* SUNOS_5 */
|
|
|
912 }
|
|
|
913
|
|
|
914 /* If we can, get the load average values. */
|
|
|
915 if (offset && getloadavg_initialized)
|
|
|
916 {
|
|
|
917 /* Try to read the load. */
|
|
|
918 #ifndef SUNOS_5
|
|
|
919 if (lseek (channel, offset, 0) == -1L
|
|
|
920 || read (channel, (char *) load_ave, sizeof (load_ave))
|
|
|
921 != sizeof (load_ave))
|
|
|
922 {
|
|
|
923 close (channel);
|
|
|
924 getloadavg_initialized = 0;
|
|
|
925 }
|
|
|
926 #else /* SUNOS_5 */
|
|
|
927 if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
|
|
928 != sizeof (load_ave))
|
|
|
929 {
|
|
|
930 kvm_close (kd);
|
|
|
931 getloadavg_initialized = 0;
|
|
|
932 }
|
|
|
933 #endif /* SUNOS_5 */
|
|
|
934 }
|
|
|
935
|
|
|
936 if (offset == 0 || !getloadavg_initialized)
|
|
|
937 return -1;
|
|
|
938
|
|
|
939 if (nelem > 0)
|
|
|
940 loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
|
|
941 if (nelem > 1)
|
|
|
942 loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
|
|
943 if (nelem > 2)
|
|
|
944 loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
|
|
945
|
|
|
946 #define LDAV_DONE
|
|
|
947 #endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
|
|
948
|
|
|
949 return elem;
|
|
|
950 }
|
|
|
951
|
|
|
952 #endif /* ! HAVE_GETLOADAVG */
|
|
|
953
|
|
|
954 #ifdef TEST
|
|
|
955 void
|
|
84
|
956 main (int argc, char **argv)
|
|
0
|
957 {
|
|
|
958 int naptime = 0;
|
|
|
959
|
|
|
960 if (argc > 1)
|
|
|
961 naptime = atoi (argv[1]);
|
|
|
962
|
|
|
963 while (1)
|
|
|
964 {
|
|
|
965 double avg[3];
|
|
|
966 int loads;
|
|
|
967
|
|
|
968 errno = 0; /* Don't be misled if it doesn't set errno. */
|
|
|
969 loads = getloadavg (avg, 3);
|
|
|
970 if (loads == -1)
|
|
|
971 {
|
|
|
972 perror ("Error getting load average");
|
|
|
973 exit (1);
|
|
|
974 }
|
|
|
975 if (loads > 0)
|
|
|
976 printf ("1-minute: %f ", avg[0]);
|
|
|
977 if (loads > 1)
|
|
|
978 printf ("5-minute: %f ", avg[1]);
|
|
|
979 if (loads > 2)
|
|
|
980 printf ("15-minute: %f ", avg[2]);
|
|
|
981 if (loads > 0)
|
|
|
982 putchar ('\n');
|
|
|
983
|
|
|
984 if (naptime == 0)
|
|
|
985 break;
|
|
|
986 sleep (naptime);
|
|
|
987 }
|
|
|
988
|
|
|
989 exit (0);
|
|
|
990 }
|
|
|
991 #endif /* TEST */
|
|
231
|
992
|
|
|
993 #else
|
|
|
994
|
|
|
995 /* Emulate getloadavg. */
|
|
|
996 int
|
|
|
997 getloadavg (double loadavg[], int nelem)
|
|
|
998 {
|
|
|
999 int i;
|
|
|
1000
|
|
|
1001 /* A faithful emulation is going to have to be saved for a rainy day. */
|
|
|
1002 for (i = 0; i < nelem; i++)
|
|
|
1003 {
|
|
|
1004 loadavg[i] = 0.0;
|
|
|
1005 }
|
|
|
1006 return i;
|
|
|
1007 }
|
|
|
1008
|
|
|
1009 #endif /*__GNUWIN32__*/
|
|
412
|
1010 #endif /* WINDOWSNT */
|
