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Initial revision
This commit is contained in:
Roland McGrath
parent
e66d29867e
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737
getloadavg.c
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737
getloadavg.c
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@ -0,0 +1,737 @@
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/* Get the system load averages.
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Copyright (C) 1985, 86, 87, 88, 89, 91, 92, 93
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Compile-time symbols that this file uses:
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FIXUP_KERNEL_SYMBOL_ADDR() Adjust address in returned struct nlist.
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KERNEL_FILE Pathname of the kernel to nlist.
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LDAV_CVT() Scale the load average from the kernel.
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Returns a double.
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LDAV_SYMBOL Name of kernel symbol giving load average.
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LOAD_AVE_TYPE Type of the load average array in the kernel.
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Must be defined unless one of
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apollo, DGUX, NeXT, or UMAX is defined;
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otherwise, no load average is available.
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NLIST_STRUCT Include nlist.h, not a.out.h, and
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the nlist n_name element is a pointer,
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not an array.
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NLIST_NAME_UNION struct nlist has an n_un member, not n_name.
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LINUX_LDAV_FILE [LINUX]: Name of file containing load averages.
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Specific system predefines this file uses, aside from setting
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default values if not emacs:
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apollo
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BSD Real BSD, not just BSD-like.
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DGUX
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eunice UNIX emulator under VMS.
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hpux
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NeXT
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sgi
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sequent Sequent Dynix 3.x.x (BSD)
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_SEQUENT_ Sequent DYNIX/ptx 1.x.x (SYSV)
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sony_news NEWS-OS (works at least for 4.1C)
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UMAX
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UMAX4_3
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VMS
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LINUX Linux: assumes /proc filesystem mounted.
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Support from Michael K. Johnson.
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In addition, to avoid nesting many #ifdefs, we internally set
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LDAV_DONE to indicate that the load average has been computed.
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We also #define LDAV_PRIVILEGED if a program will require
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special installation to be able to call getloadavg. */
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#include <sys/types.h>
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/* Both the Emacs and non-Emacs sections want this. Some
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configuration files' definitions for the LOAD_AVE_CVT macro (like
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sparc.h's) use macros like FSCALE, defined here. */
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#ifdef unix
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#include <sys/param.h>
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/* The existing Emacs configuration files define a macro called
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LOAD_AVE_CVT, which accepts a value of type LOAD_AVE_TYPE, and
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returns the load average multiplied by 100. What we actually want
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is a macro called LDAV_CVT, which returns the load average as an
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unmultiplied double.
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For backwards compatibility, we'll define LDAV_CVT in terms of
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LOAD_AVE_CVT, but future machine config files should just define
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LDAV_CVT directly. */
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#if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT)
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#define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0)
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#endif
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#if !defined (BSD) && defined (ultrix)
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/* Ultrix behaves like BSD on Vaxen. */
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#define BSD
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#endif
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#ifdef NeXT
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/* NeXT in the 2.{0,1,2} releases defines BSD in <sys/param.h>, which
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conflicts with the definition understood in this file, that this
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really is BSD. */
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#undef BSD
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/* NeXT defines FSCALE in <sys/param.h>. However, we take FSCALE being
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defined to mean that the nlist method should be used, which is not true. */
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#undef FSCALE
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#endif
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/* Set values that are different from the defaults, which are
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set a little farther down with #ifndef. */
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/* Some shorthands. */
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#if defined (HPUX) && !defined (hpux)
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#define hpux
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#endif
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#if defined(hp300) && !defined(hpux)
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#define MORE_BSD
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#endif
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#if defined(ultrix) && defined(mips)
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#define decstation
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#endif
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#if defined(sun) && defined(SVR4)
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#define SUNOS_5
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#endif
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#if defined (__osf__) && defined (__alpha__)
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#define OSF_ALPHA
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#endif
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#if defined (__osf__) && (defined (mips) || defined (__mips__))
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#define OSF_MIPS
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#include <sys/table.h>
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#endif
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/* UTek's /bin/cc on the 4300 has no architecture specific cpp define by
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default, but _MACH_IND_SYS_TYPES is defined in <sys/types.h>. Combine
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that with a couple of other things and we'll have a unique match. */
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#if !defined (tek4300) && defined (unix) && defined (m68k) && defined (mc68000) && defined (mc68020) && defined (_MACH_IND_SYS_TYPES)
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#define tek4300 /* Define by emacs, but not by other users. */
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#endif
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/* VAX C can't handle multi-line #ifs. */
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#if (defined(MORE_BSD) || defined(sun) || defined(decstation) || defined(_SEQUENT_) || defined(sgi) || defined(SVR4) || defined(sony_news) || defined(sequent) || defined (OSF_ALPHA) || (defined (ardent) && defined (titan)) || defined (tek4300))
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#define LOAD_AVE_TYPE long
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#endif
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#ifndef FSCALE
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/* SunOS and some others define FSCALE in sys/param.h. */
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#ifdef MORE_BSD
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#define FSCALE 2048.0
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#endif
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#if defined(MIPS) || defined(SVR4) || defined(decstation)
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#define FSCALE 256
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#endif
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#if defined (sgi) || defined (sequent)
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#define FSCALE 1000.0
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#endif
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#if defined (ardent) && defined (titan)
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#define FSCALE 65536.0
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#endif
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#ifdef tek4300
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#define FSCALE 100.0
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#endif
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#endif /* Not FSCALE. */
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#if !defined (LDAV_CVT) && defined (FSCALE)
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#define LDAV_CVT(n) (((double) (n)) / FSCALE)
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#endif
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/* VAX C can't handle multi-line #ifs. */
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#if !defined(NLIST_STRUCT) && (defined(MORE_BSD) || defined(sun) || defined(decstation) || defined(hpux) || defined(_SEQUENT_) || defined(sequent) || defined(sgi) || defined(SVR4) || defined(sony_news) || defined (OSF_ALPHA) || (defined (ardent) && defined (titan)) || defined (tek4300) || defined (butterfly))
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#define NLIST_STRUCT
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#endif
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#if defined(sgi) || (defined(mips) && !defined(BSD))
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#define FIXUP_KERNEL_SYMBOL_ADDR(nl) ((nl)[0].n_value &= ~(1 << 31))
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#endif
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#if !defined (KERNEL_FILE) && defined (sequent)
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#define KERNEL_FILE "/dynix"
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#endif
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#if !defined (KERNEL_FILE) && defined (hpux)
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#define KERNEL_FILE "/hp-ux"
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#endif
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#if !defined(KERNEL_FILE) && (defined(_SEQUENT_) || defined(MIPS) || defined(SVR4) || defined(ISC) || defined (sgi) || defined(SVR4) || (defined (ardent) && defined (titan)))
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#define KERNEL_FILE "/unix"
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#endif
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#if !defined (LDAV_SYMBOL) && defined (alliant)
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#define LDAV_SYMBOL "_Loadavg"
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#endif
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#if !defined(LDAV_SYMBOL) && ((defined(hpux) && !defined(hp9000s300)) || defined(_SEQUENT_) || defined(SVR4) || defined(ISC) || defined(sgi) || (defined (ardent) && defined (titan)))
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#define LDAV_SYMBOL "avenrun"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <stdio.h>
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#include <errno.h>
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#ifndef errno
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extern int errno;
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#endif
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/* LOAD_AVE_TYPE should only get defined if we're going to use the
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nlist method. */
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#if !defined(LOAD_AVE_TYPE) && (defined(BSD) || defined(LDAV_CVT) || defined(KERNEL_FILE) || defined(LDAV_SYMBOL))
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#define LOAD_AVE_TYPE double
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#endif
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#ifdef LOAD_AVE_TYPE
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#ifndef VMS
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#ifndef NLIST_STRUCT
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#include <a.out.h>
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#else /* NLIST_STRUCT */
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#include <nlist.h>
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#endif /* NLIST_STRUCT */
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#ifdef SUNOS_5
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#include <fcntl.h>
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#include <kvm.h>
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#endif
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#ifndef KERNEL_FILE
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#define KERNEL_FILE "/vmunix"
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#endif /* KERNEL_FILE */
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#ifndef LDAV_SYMBOL
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#define LDAV_SYMBOL "_avenrun"
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#endif /* LDAV_SYMBOL */
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#else /* VMS */
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#ifndef eunice
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#include <iodef.h>
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#include <descrip.h>
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#else /* eunice */
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#include <vms/iodef.h>
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#endif /* eunice */
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#endif /* VMS */
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#ifndef LDAV_CVT
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#define LDAV_CVT(n) ((double) (n))
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#endif /* !LDAV_CVT */
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#endif /* LOAD_AVE_TYPE */
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#ifdef NeXT
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#ifdef HAVE_MACH_MACH_H
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#include <mach/mach.h>
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#else
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#include <mach.h>
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#endif
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#endif /* NeXT */
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#ifdef sgi
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#include <sys/sysmp.h>
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#endif /* sgi */
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#ifdef UMAX
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#include <stdio.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/wait.h>
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#include <sys/syscall.h>
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#ifdef UMAX_43
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#include <machine/cpu.h>
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#include <inq_stats/statistics.h>
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#include <inq_stats/sysstats.h>
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#include <inq_stats/cpustats.h>
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#include <inq_stats/procstats.h>
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#else /* Not UMAX_43. */
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#include <sys/sysdefs.h>
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#include <sys/statistics.h>
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#include <sys/sysstats.h>
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#include <sys/cpudefs.h>
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#include <sys/cpustats.h>
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#include <sys/procstats.h>
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#endif /* Not UMAX_43. */
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#endif /* UMAX */
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#ifdef DGUX
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#include <sys/dg_sys_info.h>
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#endif
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#if defined(HAVE_FCNTL_H) || defined(_POSIX_VERSION)
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#include <fcntl.h>
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#else
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#include <sys/file.h>
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#endif
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/* Avoid static vars inside a function since in HPUX they dump as pure. */
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#ifdef NeXT
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static processor_set_t default_set;
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static int getloadavg_initialized;
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#endif /* NeXT */
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#ifdef UMAX
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static unsigned int cpus = 0;
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static unsigned int samples;
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#endif /* UMAX */
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#ifdef DGUX
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static struct dg_sys_info_load_info load_info; /* what-a-mouthful! */
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#endif /* DGUX */
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#ifdef LOAD_AVE_TYPE
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/* File descriptor open to /dev/kmem or VMS load ave driver. */
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static int channel;
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/* Nonzero iff channel is valid. */
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static int getloadavg_initialized;
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/* Offset in kmem to seek to read load average, or 0 means invalid. */
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static long offset;
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#if !defined(VMS) && !defined(sgi)
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static struct nlist nl[2];
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#endif /* Not VMS or sgi */
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#ifdef SUNOS_5
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static kvm_t *kd;
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#endif /* SUNOS_5 */
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#endif /* LOAD_AVE_TYPE */
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/* Put the 1 minute, 5 minute and 15 minute load averages
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into the first NELEM elements of LOADAVG.
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Return the number written (never more than 3),
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or -1 if an error occurred. */
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int
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getloadavg (loadavg, nelem)
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double loadavg[];
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int nelem;
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{
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int elem = 0; /* Return value. */
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#if !defined (LDAV_DONE) && defined (LINUX)
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#define LDAV_DONE
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#undef LOAD_AVE_TYPE
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#ifndef LINUX_LDAV_FILE
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#define LINUX_LDAV_FILE "/proc/loadavg"
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#endif
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char ldavgbuf[40];
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double load_ave[3];
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int fd, count;
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fd = open (LINUX_LDAV_FILE, O_RDONLY);
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if (fd == -1)
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return -1;
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count = read (fd, ldavgbuf, 40);
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(void) close (fd);
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if (count <= 0)
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return -1;
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count = sscanf (ldavgbuf, "%lf %lf %lf",
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&load_ave[0], &load_ave[1], &load_ave[2]);
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if (count < 1)
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return -1;
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for (elem = 0; elem < nelem && elem < count; elem++)
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loadavg[elem] = load_ave[elem];
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return elem;
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#endif /* LINUX */
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#if !defined (LDAV_DONE) && defined (NeXT)
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#define LDAV_DONE
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/* The NeXT code was adapted from iscreen 3.2. */
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host_t host;
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struct processor_set_basic_info info;
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unsigned info_count;
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if (nelem > 1)
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{
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/* We only know how to get the 1-minute average for this system. */
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errno = EINVAL;
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return -1;
|
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}
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|
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if (!getloadavg_initialized)
|
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{
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if (processor_set_default (host_self (), &default_set) == KERN_SUCCESS)
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getloadavg_initialized = 1;
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}
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if (getloadavg_initialized)
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{
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info_count = PROCESSOR_SET_BASIC_INFO_COUNT;
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if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host,
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(processor_set_info_t) &info, &info_count)
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!= KERN_SUCCESS)
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getloadavg_initialized = 0;
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||||
else
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{
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if (nelem > 0)
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loadavg[elem++] = (double) info.load_average / LOAD_SCALE;
|
||||
}
|
||||
}
|
||||
|
||||
if (!getloadavg_initialized)
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return -1;
|
||||
#endif /* NeXT */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (UMAX)
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||||
#define LDAV_DONE
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/* UMAX 4.2, which runs on the Encore Multimax multiprocessor, does not
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have a /dev/kmem. Information about the workings of the running kernel
|
||||
can be gathered with inq_stats system calls.
|
||||
We only know how to get the 1-minute average for this system. */
|
||||
|
||||
struct proc_summary proc_sum_data;
|
||||
struct stat_descr proc_info;
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||||
double load;
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||||
register unsigned int i, j;
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||||
|
||||
if (cpus == 0)
|
||||
{
|
||||
register unsigned int c, i;
|
||||
struct cpu_config conf;
|
||||
struct stat_descr desc;
|
||||
|
||||
desc.sd_next = 0;
|
||||
desc.sd_subsys = SUBSYS_CPU;
|
||||
desc.sd_type = CPUTYPE_CONFIG;
|
||||
desc.sd_addr = (char *) &conf;
|
||||
desc.sd_size = sizeof conf;
|
||||
|
||||
if (inq_stats (1, &desc))
|
||||
return -1;
|
||||
|
||||
c = 0;
|
||||
for (i = 0; i < conf.config_maxclass; ++i)
|
||||
{
|
||||
struct class_stats stats;
|
||||
bzero ((char *) &stats, sizeof stats);
|
||||
|
||||
desc.sd_type = CPUTYPE_CLASS;
|
||||
desc.sd_objid = i;
|
||||
desc.sd_addr = (char *) &stats;
|
||||
desc.sd_size = sizeof stats;
|
||||
|
||||
if (inq_stats (1, &desc))
|
||||
return -1;
|
||||
|
||||
c += stats.class_numcpus;
|
||||
}
|
||||
cpus = c;
|
||||
samples = cpus < 2 ? 3 : (2 * cpus / 3);
|
||||
}
|
||||
|
||||
proc_info.sd_next = 0;
|
||||
proc_info.sd_subsys = SUBSYS_PROC;
|
||||
proc_info.sd_type = PROCTYPE_SUMMARY;
|
||||
proc_info.sd_addr = (char *) &proc_sum_data;
|
||||
proc_info.sd_size = sizeof (struct proc_summary);
|
||||
proc_info.sd_sizeused = 0;
|
||||
|
||||
if (inq_stats (1, &proc_info) != 0)
|
||||
return -1;
|
||||
|
||||
load = proc_sum_data.ps_nrunnable;
|
||||
j = 0;
|
||||
for (i = samples - 1; i > 0; --i)
|
||||
{
|
||||
load += proc_sum_data.ps_nrun[j];
|
||||
if (j++ == PS_NRUNSIZE)
|
||||
j = 0;
|
||||
}
|
||||
|
||||
if (nelem > 0)
|
||||
loadavg[elem++] = load / samples / cpus;
|
||||
#endif /* UMAX */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (DGUX)
|
||||
#define LDAV_DONE
|
||||
/* This call can return -1 for an error, but with good args
|
||||
it's not supposed to fail. The first argument is for no
|
||||
apparent reason of type `long int *'. */
|
||||
dg_sys_info ((long int *) &load_info,
|
||||
DG_SYS_INFO_LOAD_INFO_TYPE,
|
||||
DG_SYS_INFO_LOAD_VERSION_0);
|
||||
|
||||
if (nelem > 0)
|
||||
loadavg[elem++] = load_info.one_minute;
|
||||
if (nelem > 1)
|
||||
loadavg[elem++] = load_info.five_minute;
|
||||
if (nelem > 2)
|
||||
loadavg[elem++] = load_info.fifteen_minute;
|
||||
#endif /* DGUX */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (apollo)
|
||||
#define LDAV_DONE
|
||||
/* Apollo code from lisch@mentorg.com (Ray Lischner).
|
||||
|
||||
This system call is not documented. The load average is obtained as
|
||||
three long integers, for the load average over the past minute,
|
||||
five minutes, and fifteen minutes. Each value is a scaled integer,
|
||||
with 16 bits of integer part and 16 bits of fraction part.
|
||||
|
||||
I'm not sure which operating system first supported this system call,
|
||||
but I know that SR10.2 supports it. */
|
||||
|
||||
extern void proc1_$get_loadav ();
|
||||
unsigned long load_ave[3];
|
||||
|
||||
proc1_$get_loadav (load_ave);
|
||||
|
||||
if (nelem > 0)
|
||||
loadavg[elem++] = load_ave[0] / 65536.0;
|
||||
if (nelem > 1)
|
||||
loadavg[elem++] = load_ave[1] / 65536.0;
|
||||
if (nelem > 2)
|
||||
loadavg[elem++] = load_ave[2] / 65536.0;
|
||||
#endif /* apollo */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (OSF_MIPS)
|
||||
#define LDAV_DONE
|
||||
#define LDAV_PRIVILEGED
|
||||
|
||||
struct tbl_loadavg load_ave;
|
||||
table (TBL_LOADAVG, 0, &load_ave, 1, sizeof (load_ave));
|
||||
loadavg[elem++] = (load_ave.tl_lscale == 0
|
||||
? load_ave.tl_avenrun.d[0]
|
||||
: (load_ave.tl_avenrun.l[0] / load_ave.tl_lscale));
|
||||
#endif /* OSF_MIPS */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (VMS)
|
||||
/* VMS specific code -- read from the Load Ave driver. */
|
||||
|
||||
LOAD_AVE_TYPE load_ave[3];
|
||||
static int getloadavg_initialized = 0;
|
||||
#ifdef eunice
|
||||
struct
|
||||
{
|
||||
int dsc$w_length;
|
||||
char *dsc$a_pointer;
|
||||
} descriptor;
|
||||
#endif
|
||||
|
||||
/* Ensure that there is a channel open to the load ave device. */
|
||||
if (!getloadavg_initialized)
|
||||
{
|
||||
/* Attempt to open the channel. */
|
||||
#ifdef eunice
|
||||
descriptor.dsc$w_length = 18;
|
||||
descriptor.dsc$a_pointer = "$$VMS_LOAD_AVERAGE";
|
||||
#else
|
||||
$DESCRIPTOR (descriptor, "LAV0:");
|
||||
#endif
|
||||
if (sys$assign (&descriptor, &channel, 0, 0) & 1)
|
||||
getloadavg_initialized = 1;
|
||||
}
|
||||
|
||||
/* Read the load average vector. */
|
||||
if (getloadavg_initialized
|
||||
&& !(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
|
||||
load_ave, 12, 0, 0, 0, 0) & 1))
|
||||
{
|
||||
sys$dassgn (channel);
|
||||
getloadavg_initialized = 0;
|
||||
}
|
||||
|
||||
if (!getloadavg_initialized)
|
||||
return -1;
|
||||
#endif /* VMS */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined(LOAD_AVE_TYPE) && !defined(VMS)
|
||||
|
||||
/* UNIX-specific code -- read the average from /dev/kmem. */
|
||||
|
||||
#define LDAV_PRIVILEGED /* This code requires special installation. */
|
||||
|
||||
LOAD_AVE_TYPE load_ave[3];
|
||||
|
||||
/* Get the address of LDAV_SYMBOL. */
|
||||
if (offset == 0)
|
||||
{
|
||||
#ifndef SUNOS_5
|
||||
#ifndef sgi
|
||||
#ifndef NLIST_STRUCT
|
||||
strcpy (nl[0].n_name, LDAV_SYMBOL);
|
||||
strcpy (nl[1].n_name, "");
|
||||
#else /* NLIST_STRUCT */
|
||||
#ifdef NLIST_NAME_UNION
|
||||
nl[0].n_un.n_name = LDAV_SYMBOL;
|
||||
nl[1].n_un.n_name = 0;
|
||||
#else /* not NLIST_NAME_UNION */
|
||||
nl[0].n_name = LDAV_SYMBOL;
|
||||
nl[1].n_name = 0;
|
||||
#endif /* not NLIST_NAME_UNION */
|
||||
#endif /* NLIST_STRUCT */
|
||||
|
||||
if (nlist (KERNEL_FILE, nl) >= 0)
|
||||
/* Omit "&& nl[0].n_type != 0 " -- it breaks on Sun386i. */
|
||||
{
|
||||
#ifdef FIXUP_KERNEL_SYMBOL_ADDR
|
||||
FIXUP_KERNEL_SYMBOL_ADDR (nl);
|
||||
#endif
|
||||
offset = nl[0].n_value;
|
||||
}
|
||||
#else /* sgi */
|
||||
int ldav_off;
|
||||
|
||||
ldav_off = sysmp (MP_KERNADDR, MPKA_AVENRUN);
|
||||
if (ldav_off != -1)
|
||||
offset = (long) ldav_off & 0x7fffffff;
|
||||
#endif /* sgi */
|
||||
#endif /* !SUNOS_5 */
|
||||
}
|
||||
|
||||
/* Make sure we have /dev/kmem open. */
|
||||
if (!getloadavg_initialized)
|
||||
{
|
||||
#ifndef SUNOS_5
|
||||
channel = open ("/dev/kmem", 0);
|
||||
if (channel >= 0)
|
||||
getloadavg_initialized = 1;
|
||||
#else /* SUNOS_5 */
|
||||
kd = kvm_open (0, 0, 0, O_RDONLY, 0);
|
||||
if (kd != 0)
|
||||
{
|
||||
kvm_nlist (kd, nl);
|
||||
getloadavg_initialized = 1;
|
||||
}
|
||||
#endif /* SUNOS_5 */
|
||||
}
|
||||
|
||||
/* If we can, get the load average values. */
|
||||
if (offset && getloadavg_initialized)
|
||||
{
|
||||
/* Try to read the load. */
|
||||
#ifndef SUNOS_5
|
||||
if (lseek (channel, offset, 0) == -1L
|
||||
|| read (channel, (char *) load_ave, sizeof (load_ave))
|
||||
!= sizeof (load_ave))
|
||||
{
|
||||
close (channel);
|
||||
getloadavg_initialized = 0;
|
||||
}
|
||||
#else /* SUNOS_5 */
|
||||
if (kvm_read (kd, offset, (char *) load_ave, sizeof (load_ave))
|
||||
!= sizeof (load_ave))
|
||||
{
|
||||
kvm_close (kd);
|
||||
getloadavg_initialized = 0;
|
||||
}
|
||||
#endif /* SUNOS_5 */
|
||||
}
|
||||
|
||||
if (offset == 0 || !getloadavg_initialized)
|
||||
return -1;
|
||||
#endif /* LOAD_AVE_TYPE and not VMS */
|
||||
|
||||
#if !defined (LDAV_DONE) && defined (LOAD_AVE_TYPE) /* Including VMS. */
|
||||
if (nelem > 0)
|
||||
loadavg[elem++] = LDAV_CVT (load_ave[0]);
|
||||
if (nelem > 1)
|
||||
loadavg[elem++] = LDAV_CVT (load_ave[1]);
|
||||
if (nelem > 2)
|
||||
loadavg[elem++] = LDAV_CVT (load_ave[2]);
|
||||
|
||||
#define LDAV_DONE
|
||||
#endif /* !LDAV_DONE && LOAD_AVE_TYPE */
|
||||
|
||||
#ifdef LDAV_DONE
|
||||
return elem;
|
||||
#else
|
||||
/* Set errno to zero to indicate that there was no particular error;
|
||||
this function just can't work at all on this system. */
|
||||
errno = 0;
|
||||
return -1;
|
||||
#endif
|
||||
}
|
||||
|
||||
#ifdef TEST
|
||||
void
|
||||
main (argc, argv)
|
||||
int argc;
|
||||
char **argv;
|
||||
{
|
||||
int naptime = 0;
|
||||
|
||||
if (argc > 1)
|
||||
naptime = atoi (argv[1]);
|
||||
|
||||
if (naptime == 0)
|
||||
naptime = 5;
|
||||
|
||||
while (1)
|
||||
{
|
||||
double avg[3];
|
||||
int loads;
|
||||
|
||||
errno = 0; /* Don't be misled if it doesn't set errno. */
|
||||
loads = getloadavg (avg, 3);
|
||||
if (loads == -1)
|
||||
{
|
||||
perror ("Error getting load average");
|
||||
exit (1);
|
||||
}
|
||||
if (loads > 0)
|
||||
printf ("1-minute: %f ", avg[0]);
|
||||
if (loads > 1)
|
||||
printf ("5-minute: %f ", avg[1]);
|
||||
if (loads > 2)
|
||||
printf ("15-minute: %f ", avg[2]);
|
||||
if (loads > 0)
|
||||
putchar ('\n');
|
||||
sleep (naptime);
|
||||
}
|
||||
}
|
||||
#endif /* TEST */
|
||||
Loading…
Reference in New Issue
Block a user