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Diffstat (limited to 'get_load.c')
| -rw-r--r-- | get_load.c | 1174 |
1 files changed, 1174 insertions, 0 deletions
diff --git a/get_load.c b/get_load.c new file mode 100644 index 0000000..09386dc --- /dev/null +++ b/get_load.c @@ -0,0 +1,1174 @@ +/* $XConsortium: get_load.c /main/37 1996/03/09 09:38:04 kaleb $ */ +/* $XFree86: xc/programs/xload/get_load.c,v 1.18 2002/09/18 17:11:57 tsi Exp $ */ +/* + +Copyright (c) 1989 X Consortium + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of the X Consortium shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from the X Consortium. + +*/ + +/* + * get_load - get system load + * + * Authors: Many and varied... + * + * Call InitLoadPoint() to initialize. + * GetLoadPoint() is a callback for the StripChart widget. + */ + +#include <X11/Xos.h> +#include <X11/Intrinsic.h> +#include <X11/Xlocale.h> +#include <stdio.h> +#include <stdlib.h> +#include "xload.h" + +#if !defined(DGUX) +#if defined(att) || defined(QNX4) +#define LOADSTUB +#endif + +#ifndef macII +#ifndef apollo +#ifndef LOADSTUB +#if !defined(linux) && !defined(__UNIXOS2__) && !defined(__GNU__) +#include <nlist.h> +#endif /* !linux && ... */ +#endif /* LOADSTUB */ +#endif /* apollo */ +#endif /* macII */ + +#if defined(MOTOROLA) && defined(SYSV) +#include <sys/sysinfo.h> +#endif + +#ifdef sun +# include <sys/param.h> +# if defined(SVR4) && (OSMAJORVERSION == 5) && (OSMINORVERSION > 3) +# include <kvm.h> +# endif +# if defined(i386) && !defined(SVR4) +# include <kvm.h> +# define KVM_ROUTINES +# endif /* i386 */ +#endif + +#ifdef CSRG_BASED +#include <sys/param.h> +#endif + +#if defined(umips) || (defined(ultrix) && defined(mips)) +#include <sys/fixpoint.h> +#endif + +#if defined(CRAY) || defined(AIXV3) +#include <sys/param.h> +#define word word_t +#include <sys/sysinfo.h> +#undef word +#undef n_type +#define n_type n_value +#endif /* CRAY */ + +#ifdef sequent +#include <sys/vm.h> +#endif /* sequent */ + +#ifdef macII +#include <a.out.h> +#include <sys/var.h> +#define X_AVENRUN 0 +#define fxtod(i) (vec[i].high+(vec[i].low/65536.0)) +struct lavnum { + unsigned short high; + unsigned short low; +}; +#endif /* macII */ + +#ifdef hcx +#include <sys/param.h> +#endif /* hcx */ + +#if defined(UTEK) || defined(alliant) || (defined(MOTOROLA) && defined(SVR4)) +#define FSCALE 100.0 +#endif + +#ifdef sequent +#define FSCALE 1000.0 +#endif + +#ifdef sgi +#define FSCALE 1024.0 +#endif + +#if defined(sony) && OSMAJORVERSION == 4 +#ifdef mips +#include <sys/fixpoint.h> +#else +#include <sys/param.h> +#endif +#endif + +#ifdef __osf__ +/* + * Use the table(2) interface; it doesn't require setuid root. + * + * Select 0, 1, or 2 for 5, 30, or 60 second load averages. + */ +#ifndef WHICH_AVG +#define WHICH_AVG 1 +#endif +#include <sys/table.h> +#endif + +#ifdef SVR4 +#ifndef FSCALE +#define FSCALE (1 << 8) +#endif +#endif + +#ifdef X_NOT_POSIX +extern long lseek(); +#endif + +static void xload_error( +#if NeedFunctionPrototypes +char *, char * +#endif +); + + +#ifdef apollo +#include <apollo/base.h> +#include <apollo/time.h> +typedef struct { + short state; /* ready, waiting, etc. */ + pinteger usr; /* user sr */ + linteger upc; /* user pc */ + linteger usp; /* user stack pointer */ + linteger usb; /* user sb ptr (A6) */ + time_$clock_t cpu_total; /* cumulative cpu used by process */ + unsigned short priority; /* process priority */ + } proc1_$info_t; + +void proc1_$get_cput( + time_$clock_t *cput +); + +void proc1_$get_info( + short &pid, + proc1_$info_t *info, + status_$t *sts +); + +static int lastNullCpu; +static int lastClock; + +void InitLoadPoint() /* Apollo version */ +{ + time_$clock_t timeNow; + proc1_$info_t info; + status_$t st; + + proc1_$get_info( (short) 2, &info, &st ); + time_$clock( &timeNow ); + + lastClock = timeNow.low32; + lastNullCpu = info.cpu_total.low32; +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) /* Apollo version */ + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + time_$clock_t timeNow; + double temp; + proc1_$info_t info; + status_$t st; + + proc1_$get_info( (short) 2, &info, &st ); + time_$clock( &timeNow ); + + temp = info.cpu_total.low32 - lastNullCpu; + *(double *)call_data = 1.0 - temp / (timeNow.low32 - lastClock); + + lastClock = timeNow.low32; + lastNullCpu = info.cpu_total.low32; +} +#else /* not apollo */ +#if defined(SYSV) && defined(i386) +/* + * inspired by 'avgload' by John F. Haugh II + */ +#include <sys/param.h> +#include <sys/buf.h> +#include <sys/immu.h> +#include <sys/region.h> +#include <sys/var.h> +#include <sys/proc.h> +#define KERNEL_FILE "/unix" +#define KMEM_FILE "/dev/kmem" +#define VAR_NAME "v" +#define PROC_NAME "proc" +#define BUF_NAME "buf" +#define DECAY 0.8 +struct nlist namelist[] = { + {VAR_NAME}, + {PROC_NAME}, + {BUF_NAME}, + {0}, +}; + +static int kmem; +static struct var v; +static struct proc *p; +static XtPointer first_buf, last_buf; + +void InitLoadPoint() /* SYSV386 version */ +{ + int i; + + nlist( KERNEL_FILE, namelist); + + for (i=0; namelist[i].n_name; i++) + if (namelist[i].n_value == 0) + xload_error("cannot get name list from", KERNEL_FILE); + + if ((kmem = open(KMEM_FILE, O_RDONLY)) < 0) + xload_error("cannot open", KMEM_FILE); + + if (lseek(kmem, namelist[0].n_value, 0) == -1) + xload_error("cannot seek", VAR_NAME); + + if (read(kmem, &v, sizeof(v)) != sizeof(v)) + xload_error("cannot read", VAR_NAME); + + if ((p=(struct proc *)malloc(v.v_proc*sizeof(*p))) == NULL) + xload_error("cannot allocat space for", PROC_NAME); + + first_buf = (XtPointer) namelist[2].n_value; + last_buf = first_buf + v.v_buf * sizeof(struct buf); +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) /* SYSV386 version */ +Widget w; /* unused */ +XtPointer closure; /* unused */ +XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + static double avenrun = 0.0; + int i, nproc, size; + + (void) lseek(kmem, namelist[0].n_value, 0); + (void) read(kmem, &v, sizeof(v)); + + size = (struct proc *)v.ve_proc - (struct proc *)namelist[1].n_value; + + (void) lseek(kmem, namelist[1].n_value, 0); + (void) read(kmem, p, size * sizeof(struct proc)); + + for (nproc = 0, i=0; i<size; i++) + if ((p[i].p_stat == SRUN) || + (p[i].p_stat == SIDL) || + (p[i].p_stat == SXBRK) || + (p[i].p_stat == SSLEEP && (p[i].p_pri < PZERO) && + (p[i].p_wchan >= first_buf) && (p[i].p_wchan < last_buf))) + nproc++; + + /* update the load average using a decay filter */ + avenrun = DECAY * avenrun + nproc * (1.0 - DECAY); + *loadavg = avenrun; + + return; +} +#else /* not (SYSV && i386) */ +#ifdef KVM_ROUTINES +/* + * Sun 386i Code - abstracted to see the wood for the trees + */ + +static struct nlist nl[2]; +static kvm_t *kd; + +void +InitLoadPoint() /* Sun 386i version */ +{ + kd = kvm_open("/vmunix", NULL, NULL, O_RDONLY, "Load Widget"); + if (kd == (kvm_t *)0) { + xload_error("cannot get access to kernel address space", ""); + } + + nl[0].n_name = "avenrun"; + nl[1].n_name = NULL; + + if (kvm_nlist(kd, nl) != 0) { + xload_error("cannot get name list", ""); + } + + if (nl[0].n_value == 0) { + xload_error("Cannot find address for avenrun in the kernel\n", ""); + } +} + +/* ARGSUSED */ +void +GetLoadPoint( w, closure, call_data ) /* Sun 386i version */ +Widget w; /* unused */ +XtPointer closure; /* unused */ +XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + long temp; + + if (kvm_read(kd, nl[0].n_value, (char *)&temp, sizeof (temp)) != + sizeof (temp)) { + xload_error("Kernel read error", ""); + } + *loadavg = (double)temp/FSCALE; +} +#else /* not KVM_ROUTINES */ + +#ifdef linux + +void InitLoadPoint() +{ + return; +} + +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + static int fd = -1; + int n; + char buf[10] = {0, }; +#ifndef X_LOCALE + char *dp; + static char ldp = 0; +#endif + + + if (fd < 0) + { + if (fd == -2 || + (fd = open("/proc/loadavg", O_RDONLY)) < 0) + { + fd = -2; + *(double *)call_data = 0.0; + return; + } +#ifndef X_LOCALE + ldp = *localeconv()->decimal_point; +#endif + } + else + lseek(fd, 0, 0); + + if ((n = read(fd, buf, sizeof(buf)-1)) > 0) { +#ifndef X_LOCALE + if (ldp != '.') + while ((dp = memchr(buf,'.',sizeof(buf)-1)) != NULL) { + *(char *)dp = ldp; + } + +#endif + if (sscanf(buf, "%lf", (double *)call_data) == 1) + return; + } + + + *(double *)call_data = 0.0; /* temporary hiccup */ + + return; +} + +#else /* linux */ + +#ifdef __GNU__ + +#include <mach.h> + +static processor_set_t default_set; + +void InitLoadPoint() +{ + if (processor_set_default (mach_host_self (), &default_set) != KERN_SUCCESS) + xload_error("cannot get processor_set_default", ""); +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + host_t host; + struct processor_set_basic_info info; + unsigned info_count; + + info_count = PROCESSOR_SET_BASIC_INFO_COUNT; + if (processor_set_info (default_set, PROCESSOR_SET_BASIC_INFO, &host, + (processor_set_info_t) &info, &info_count) + != KERN_SUCCESS) + { + InitLoadPoint(); + info.load_average = 0; + } + + *(double *)call_data = info.load_average * 1000 / LOAD_SCALE; + + return; +} + +#else /* __GNU__ */ + +#ifdef __DARWIN__ + +#include <mach/mach.h> + +static mach_port_t host_priv_port; + +void InitLoadPoint() +{ + host_priv_port = mach_host_self(); +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + + struct host_load_info load_data; + int host_count; + kern_return_t kr; + + host_count = sizeof(load_data)/sizeof(integer_t); + kr = host_statistics(host_priv_port, HOST_LOAD_INFO, + (host_info_t)&load_data, &host_count); + if (kr != KERN_SUCCESS) + xload_error("cannot get host statistics", ""); + *loadavg = (double)load_data.avenrun[0]/LOAD_SCALE; + return; +} + +#else /* __DARWIN__ */ + +#ifdef LOADSTUB + +void InitLoadPoint() +{ +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + *(double *)call_data = 1.0; +} + +#else /* not LOADSTUB */ + +#ifdef __osf__ + +void InitLoadPoint() +{ +} + +/*ARGSUSED*/ +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + struct tbl_loadavg load_data; + + if (table(TBL_LOADAVG, 0, (char *)&load_data, 1, sizeof(load_data)) < 0) + xload_error("error reading load average", ""); + *loadavg = (load_data.tl_lscale == 0) ? + load_data.tl_avenrun.d[WHICH_AVG] : + load_data.tl_avenrun.l[WHICH_AVG] / (double)load_data.tl_lscale; +} + +#else /* not __osf__ */ + +#ifdef __QNXNTO__ +#include <time.h> +#include <sys/neutrino.h> +static _Uint64t nto_idle = 0, nto_idle_last = 0; +static int nto_idle_id; +static struct timespec nto_now, nto_last; + +void +InitLoadPoint() +{ + nto_idle_id = ClockId(1, 1); /* Idle thread */ + ClockTime(nto_idle_id, NULL, &nto_idle_last); + clock_gettime( CLOCK_REALTIME, &nto_last); +} + +/* ARGSUSED */ +void +GetLoadPoint( w, closure, call_data ) /* QNX NTO version */ +Widget w; /* unused */ +XtPointer closure; /* unused */ +XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + double timediff; + double temp = 0.0; + + ClockTime(nto_idle_id, NULL, &nto_idle); + clock_gettime( CLOCK_REALTIME, &nto_now); + timediff = 1000000000.0 * (nto_now.tv_sec - nto_last.tv_sec) + + (nto_now.tv_nsec - nto_last.tv_nsec); + temp = 1.0 - (nto_idle-nto_idle_last)/timediff; + *loadavg = temp >= 0 ? temp : 0; + nto_idle_last = nto_idle; + nto_last = nto_now; +} +#else /* not __QNXNTO__ */ + +#ifdef __bsdi__ +#include <kvm.h> + +static struct nlist nl[] = { + { "_averunnable" }, +#define X_AVERUNNABLE 0 + { "_fscale" }, +#define X_FSCALE 1 + { "" }, +}; +static kvm_t *kd; +static int fscale; + +void InitLoadPoint() +{ + fixpt_t averunnable[3]; /* unused really */ + + if ((kd = kvm_openfiles(NULL, NULL, NULL, O_RDONLY, NULL)) == NULL) + xload_error("can't open kvm files", ""); + + if (kvm_nlist(kd, nl) != 0) + xload_error("can't read name list", ""); + + if (kvm_read(kd, (off_t)nl[X_AVERUNNABLE].n_value, (char *)averunnable, + sizeof(averunnable)) != sizeof(averunnable)) + xload_error("couldn't obtain _averunnable variable", ""); + + if (kvm_read(kd, (off_t)nl[X_FSCALE].n_value, (char *)&fscale, + sizeof(fscale)) != sizeof(fscale)) + xload_error("couldn't obtain _fscale variable", ""); + + return; +} + +void GetLoadPoint(w, closure, call_data) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* ptr to (double) return value */ +{ + double *loadavg = (double *)call_data; + fixpt_t t; + + if (kvm_read(kd, (off_t)nl[X_AVERUNNABLE].n_value, (char *)&t, + sizeof(t)) != sizeof(t)) + xload_error("couldn't obtain load average", ""); + + *loadavg = (double)t/fscale; + + return; +} + +#else /* not __bsdi__ */ +#if defined(BSD) && (BSD >= 199306) +#include <stdlib.h> + +void InitLoadPoint() +{ +} + +void GetLoadPoint(w, closure, call_data) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* ptr to (double) return value */ +{ + double *loadavg = (double *)call_data; + + if (getloadavg(loadavg, 1) < 0) + xload_error("couldn't obtain load average", ""); +} + +#else /* not BSD >= 199306 */ + +#ifndef KMEM_FILE +#define KMEM_FILE "/dev/kmem" +#endif + +#ifndef KERNEL_FILE + +#ifdef alliant +#define KERNEL_FILE "/vmunix" +#endif /* alliant */ + +#ifdef CRAY +#define KERNEL_FILE "/unicos" +#endif /* CRAY */ + +#ifdef hpux +#define KERNEL_FILE "/hp-ux" +#endif /* hpux */ + +#ifdef macII +#define KERNEL_FILE "/unix" +#endif /* macII */ + +#ifdef umips +# ifdef SYSTYPE_SYSV +# define KERNEL_FILE "/unix" +# else +# define KERNEL_FILE "/vmunix" +# endif /* SYSTYPE_SYSV */ +#endif /* umips */ + +#ifdef sequent +#define KERNEL_FILE "/dynix" +#endif /* sequent */ + +#ifdef hcx +#define KERNEL_FILE "/unix" +#endif /* hcx */ + +#ifdef MOTOROLA +#if defined(SYSV) && defined(m68k) +#define KERNEL_FILE "/sysV68" +#endif +#if defined(SYSV) && defined(m88k) +#define KERNEL_FILE "/unix" +#endif +#ifdef SVR4 +#define KERNEL_FILE "/unix" +#endif +#endif /* MOTOROLA */ + +#if defined(sun) && defined(SVR4) +#define KERNEL_FILE "/kernel/unix" +#endif + +#ifdef sgi +#if (OSMAJORVERSION > 4) +#define KERNEL_FILE "/unix" +#endif +#endif + +/* + * provide default for everyone else + */ +#ifndef KERNEL_FILE +#ifdef SVR4 +#define KERNEL_FILE "/stand/unix" +#else +#ifdef SYSV +#define KERNEL_FILE "/unix" +#else +/* If a BSD system, check in <paths.h> */ +# ifdef BSD +# include <paths.h> +# ifdef _PATH_UNIX +# define KERNEL_FILE _PATH_UNIX +# else +# ifdef _PATH_KERNEL +# define KERNEL_FILE _PATH_KERNEL +# else +# define KERNEL_FILE "/vmunix" +# endif +# endif +# else /* BSD */ +# define KERNEL_FILE "/vmunix" +# endif /* BSD */ +#endif /* SYSV */ +#endif /* SVR4 */ +#endif /* KERNEL_FILE */ +#endif /* KERNEL_FILE */ + + +#ifndef KERNEL_LOAD_VARIABLE +# if defined(BSD) && (BSD >= 199103) +# define KERNEL_LOAD_VARIABLE "_averunnable" +# endif /* BSD >= 199103 */ + +# ifdef alliant +# define KERNEL_LOAD_VARIABLE "_Loadavg" +# endif /* alliant */ + +# ifdef CRAY +# if defined(CRAY2) && OSMAJORVERSION == 4 +# define KERNEL_LOAD_VARIABLE "avenrun" +# else +# define KERNEL_LOAD_VARIABLE "sysinfo" +# define SYSINFO +# endif /* defined(CRAY2) && OSMAJORVERSION == 4 */ +# endif /* CRAY */ + +# ifdef hpux +# ifdef __hp9000s800 +# define KERNEL_LOAD_VARIABLE "avenrun" +# endif /* hp9000s800 */ +# endif /* hpux */ + +# ifdef umips +# ifdef SYSTYPE_SYSV +# define KERNEL_LOAD_VARIABLE "avenrun" +# else +# define KERNEL_LOAD_VARIABLE "_avenrun" +# endif /* SYSTYPE_SYSV */ +# endif /* umips */ + +# ifdef sgi +# define KERNEL_LOAD_VARIABLE "avenrun" +# endif /* sgi */ + +# ifdef AIXV3 +# define KERNEL_LOAD_VARIABLE "sysinfo" +# endif /* AIXV3 */ + +# ifdef MOTOROLA +# if defined(SYSV) && defined(m68k) +# define KERNEL_LOAD_VARIABLE "sysinfo" +# endif +# if defined(SYSV) && defined(m88k) +# define KERNEL_LOAD_VARIABLE "_sysinfo" +# endif +# ifdef SVR4 +# define KERNEL_LOAD_VARIABLE "avenrun" +# endif +# endif /* MOTOROLA */ + +#endif /* KERNEL_LOAD_VARIABLE */ + +/* + * provide default for everyone else + */ + +#ifndef KERNEL_LOAD_VARIABLE +# ifdef USG +# define KERNEL_LOAD_VARIABLE "sysinfo" +# define SYSINFO +# else +# ifdef SVR4 +# define KERNEL_LOAD_VARIABLE "avenrun" +# else +# define KERNEL_LOAD_VARIABLE "_avenrun" +# endif +# endif +#endif /* KERNEL_LOAD_VARIABLE */ + +#ifdef macII +static struct var v; +static int pad[2]; /* This padding is needed if xload compiled on */ + /* a/ux 1.1 is executed on a/ux 1.0, because */ + /* the var structure had too much padding in 1.0, */ + /* so the 1.0 kernel writes past the end of the 1.1 */ + /* var structure in the uvar() call. */ +static struct nlist nl[2]; +static struct lavnum vec[3]; +#else /* not macII */ +static struct nlist namelist[] = { /* namelist for vmunix grubbing */ +#define LOADAV 0 + {KERNEL_LOAD_VARIABLE}, + {0} +}; +#endif /* macII */ + +static int kmem; +static long loadavg_seek; + +void InitLoadPoint() +{ +#ifdef macII + extern nlist(); + + int i; + + strcpy(nl[0].n_name, "avenrun"); + nl[1].n_name[0] = '\0'; + + kmem = open(KMEM_FILE, O_RDONLY); + if (kmem < 0) { + xload_error("cannot open", KMEM_FILE); + } + + uvar(&v); + + if (nlist( KERNEL_FILE, nl) != 0) { + xload_error("cannot get name list from", KERNEL_FILE); + } + for (i = 0; i < 2; i++) { + nl[i].n_value = (int)nl[i].n_value - v.v_kvoffset; + } +#else /* not macII */ +#if defined(sun) && defined(SVR4) && (OSMAJORVERSION == 5) && (OSMINORVERSION > 3) + { + kvm_t *kd; + + kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "xload"); + if (kd == NULL) + { + xload_error("cannot get name list from", "kernel"); + exit(-1); + } + if (kvm_nlist (kd, namelist) < 0 ) + { + xload_error("cannot get name list from", "kernel"); + exit(-1); + } + if (namelist[LOADAV].n_type == 0 || + namelist[LOADAV].n_value == 0) { + xload_error("cannot get name list from", "kernel"); + exit(-1); + } + loadavg_seek = namelist[LOADAV].n_value; + } +#else /* sun svr4 5.5 or later */ + +#if (!defined(SVR4)) && !defined(sgi) && !defined(MOTOROLA) && !(BSD >= 199103) + extern void nlist(); +#endif + +#ifdef AIXV3 + knlist( namelist, 1, sizeof(struct nlist)); +#else + nlist( KERNEL_FILE, namelist); +#endif + /* + * Some systems appear to set only one of these to Zero if the entry could + * not be found, I hope no_one returns Zero as a good value, or bad things + * will happen to you. (I have a hard time believing the value will + * ever really be zero anyway). CDP 5/17/89. + */ +#ifdef hcx + if (namelist[LOADAV].n_type == 0 && +#else + if (namelist[LOADAV].n_type == 0 || +#endif /* hcx */ + namelist[LOADAV].n_value == 0) { + xload_error("cannot get name list from", KERNEL_FILE); + exit(-1); + } + loadavg_seek = namelist[LOADAV].n_value; +#if defined(umips) && defined(SYSTYPE_SYSV) + loadavg_seek &= 0x7fffffff; +#endif /* umips && SYSTYPE_SYSV */ +#if (defined(CRAY) && defined(SYSINFO)) + loadavg_seek += ((char *) (((struct sysinfo *)NULL)->avenrun)) - + ((char *) NULL); +#endif /* CRAY && SYSINFO */ +#endif /* sun svr4 5.5 or later */ + kmem = open(KMEM_FILE, O_RDONLY); + if (kmem < 0) xload_error("cannot open", KMEM_FILE); +#endif /* macII else */ +} + +/* ARGSUSED */ +void GetLoadPoint( w, closure, call_data ) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* pointer to (double) return value */ +{ + double *loadavg = (double *)call_data; + +#ifdef macII + lseek(kmem, (long)nl[X_AVENRUN].n_value, 0); +#else + (void) lseek(kmem, loadavg_seek, 0); +#endif + +#if defined(sun) || defined (UTEK) || defined(sequent) || defined(alliant) || defined(SVR4) || defined(sgi) || defined(hcx) || (BSD >= 199103) + { + long temp; + (void) read(kmem, (char *)&temp, sizeof(long)); + *loadavg = (double)temp/FSCALE; + } +#else /* else not sun or UTEK or sequent or alliant or SVR4 or sgi or hcx */ +# ifdef macII + { + read(kmem, vec, 3*sizeof(struct lavnum)); + *loadavg = fxtod(0); + } +# else /* else not macII */ +# if defined(umips) || (defined(ultrix) && defined(mips)) + { + fix temp; + (void) read(kmem, (char *)&temp, sizeof(fix)); + *loadavg = FIX_TO_DBL(temp); + } +# else /* not umips or ultrix risc */ +# ifdef AIXV3 + { + struct sysinfo sysinfo_now; + struct sysinfo sysinfo_last; + static firsttime = TRUE; + static double runavg = 0.0, swpavg = 0.0; + + (void) lseek(kmem, loadavg_seek, 0); + (void) read(kmem, (char *)&sysinfo_last, sizeof(struct sysinfo)); + if (firsttime) + { + *loadavg = 0.0; + firsttime = FALSE; + } + else + { + sleep(1); + (void) lseek(kmem, loadavg_seek, 0); + (void) read(kmem, (char *)&sysinfo_now, sizeof(struct sysinfo)); + runavg *= 0.8; swpavg *= 0.8; + if (sysinfo_now.runocc != sysinfo_last.runocc) + runavg += 0.2*((sysinfo_now.runque - sysinfo_last.runque - 1) + /(double)(sysinfo_now.runocc - sysinfo_last.runocc)); + if (sysinfo_now.swpocc != sysinfo_last.swpocc) + swpavg += 0.2*((sysinfo_now.swpque - sysinfo_last.swpque) + /(double)(sysinfo_now.swpocc - sysinfo_last.swpocc)); + *loadavg = runavg + swpavg; + sysinfo_last = sysinfo_now; + } + /* otherwise we leave load alone. */ + } +# else /* not AIXV3 */ +# if defined(MOTOROLA) && defined(SYSV) + { + static int init = 0; + static kmem; + static long loadavg_seek; + +#define CEXP 0.25 /* Constant used for load averaging */ + + struct sysinfo sysinfod; + static double oldloadavg; + static double cexp = CEXP; + static long sv_rq, sv_oc; /* save old values */ + double rq, oc; /* amount values have changed */ + + if (!init) + { + if (nlist(KERNEL_FILE,namelist) == -1) + { + perror("xload: nlist()"); + xload_error("cannot get name list from", KERNEL_FILE); + } + loadavg_seek = namelist[0].n_value; + + kmem = open(KMEM_FILE, O_RDONLY); + if (kmem < 0) + { + perror("xload: open()"); + xload_error("cannot open", KMEM_FILE); + } + } + + lseek(kmem, loadavg_seek, 0); + if (read(kmem, &sysinfod, (int) sizeof (struct sysinfo)) == -1) + { + perror("xload: read() SYSINFONL"); + xload_error("read failed from", KMEM_FILE); + } + + if (!init) + { + init = 1; + sv_rq = sysinfod.runque; + sv_oc = sysinfod.runocc; + oldloadavg = *loadavg = 0.0; + return; + } + /* + * calculate the amount the values have + * changed since last update + */ + rq = (double) sysinfod.runque - sv_rq; + oc = (double) sysinfod.runocc - sv_oc; + + /* + * save old values for next time + */ + sv_rq = sysinfod.runque; + sv_oc = sysinfod.runocc; + + if (oc == 0.0) /* avoid divide by zero */ + { + *loadavg = (1.0 - cexp) * oldloadavg; + + } + else + { + *loadavg = ((1.0 - cexp) * oldloadavg) + ((rq / oc) * cexp); + } + oldloadavg = *loadavg; + } +# else /* not MOTOROLA */ +# if defined(sony) && OSMAJORVERSION == 4 +# ifdef mips + { + fix temp; + (void) read(kmem, (char *)&temp, sizeof(fix)); + *loadavg = FIX_TO_DBL(temp); + } +# else /* not mips */ + { + long temp; + (void) read(kmem, (char *)&temp, sizeof(long)); + *loadavg = (double)temp/FSCALE; + } +# endif /* mips */ +# else /* not sony NEWSOS4 */ + (void) read(kmem, (char *)loadavg, sizeof(double)); +# endif /* sony NEWOS4 */ +# endif /* MOTOROLA else */ +# endif /* AIXV3 else */ +# endif /* umips else */ +# endif /* macII else */ +#endif /* sun else */ + return; +} +#endif /* BSD >= 199306 else */ +#endif /* __bsdi__ else */ +#endif /* __QNXNTO__ else */ +#endif /* __osf__ else */ +#endif /* LOADSTUB else */ +#endif /* __DARWIN__ else */ +#endif /* __GNU__ else */ +#endif /* linux else */ +#endif /* KVM_ROUTINES else */ +#endif /* SYSV && i386 else */ + +static void xload_error(str1, str2) +char *str1, *str2; +{ + (void) fprintf(stderr,"xload: %s %s\n", str1, str2); +#ifdef __bsdi__ + if (kd) + kvm_close(kd); +#endif + exit(-1); +} + +#endif /* apollo else */ + +#else /* !DGUX */ + +/* INTEL DGUX Release 4.20MU04 + * Copyright 1999 Takis Psarogiannakopoulos + * Cambridge, UK + * <takis@dpmms.cam.ac.uk> + */ + +#include <errno.h> +#include <nlist.h> +#include <sys/dg_sys_info.h> + +static struct dg_sys_info_load_info load_info; /* DG/ux */ + +#define KERNEL_FILE "/dgux" +#define LDAV_SYMBOL "_avenrun" + +void InitLoadPoint() +{ + +} + +void GetLoadPoint(w, closure, call_data) + Widget w; /* unused */ + XtPointer closure; /* unused */ + XtPointer call_data; /* ptr to (double) return value */ +{ + double *loadavg = (double *)call_data; + + if (getloadavg(loadavg, 1) < 0) + xload_error("couldn't obtain load average", ""); +} + +xload_error(str1, str2) +char *str1, *str2; +{ + (void) fprintf(stderr,"xload: %s %s\n", str1, str2); + exit(-1); +} + +#if !defined (LDAV_CVT) && defined (FSCALE) +#define LDAV_CVT(n) (((double) (n)) / FSCALE) +#endif +#if !defined(LDAV_CVT) && defined(LOAD_AVE_CVT) +#define LDAV_CVT(n) (LOAD_AVE_CVT (n) / 100.0) +#endif +#define LOAD_AVE_TYPE double +#ifndef LDAV_CVT +#define LDAV_CVT(n) ((double) (n)) +#endif /* !LDAV_CVT */ +static int channel; +static int getloadavg_initialized; +static long offset; +static struct nlist nl[2]; + + +/* GETLOADAVG FUNCTION FOR DG/ux R4.20MU04 */ + +int +getloadavg (double loadavg[], int nelem) +{ + int elem = 0; /* Return value. */ + int result =0 ; + + /* 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 *'. */ + result = dg_sys_info ((long int *) &load_info, + DG_SYS_INFO_LOAD_INFO_TYPE, DG_SYS_INFO_LOAD_VERSION_0); + if ( result == -1) + { + return(-1); + } + 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; + + return elem; +} + +#endif /* END OF DG/ux */ + + |