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/* $OpenBSD: rf_cpuutil.c,v 1.1 1999/01/11 14:29:03 niklas Exp $ */
/* $NetBSD: rf_cpuutil.c,v 1.1 1998/11/13 04:20:27 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Authors: Mark Holland, Jim Zelenka
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* rf_cpuutil.c
*
* track cpu utilization
*/
#ifdef _KERNEL
#define KERNEL
#endif
#include "rf_cpuutil.h"
#ifndef KERNEL
#include <errno.h>
#endif /* !KERNEL */
#include "rf_types.h"
#include "rf_general.h"
#include "rf_shutdown.h"
#include "rf_sys.h"
#ifdef __osf__
#include <sys/table.h>
#endif /* __osf__ */
#ifdef AIX
#include <nlist.h>
#include <sys/sysinfo.h>
#endif /* AIX */
#ifdef KERNEL
#if !defined(__NetBSD__) && !defined(__OpenBSD__)
#include <sys/dk.h>
#endif /* __NetBSD__ && !__OpenBSD__ */
#else /* KERNEL */
extern int table(int id, int index, void *addr, int nel, u_int lel);
#endif /* KERNEL */
#ifdef __osf__
static struct tbl_sysinfo start, stop;
#endif /* __osf__ */
#ifdef AIX
static int kmem_fd;
static off_t sysinfo_offset;
static struct sysinfo sysinfo_start, sysinfo_stop;
static struct nlist namelist[] = {
{{"sysinfo"}},
{{""}},
};
#endif /* AIX */
#ifdef AIX
static void rf_ShutdownCpuMonitor(ignored)
void *ignored;
{
close(kmem_fd);
}
#endif /* AIX */
int rf_ConfigureCpuMonitor(listp)
RF_ShutdownList_t **listp;
{
#ifdef AIX
int rc;
rc = knlist(namelist, 1, sizeof(struct nlist));
if (rc) {
RF_ERRORMSG("Could not knlist() to config CPU monitor\n");
return(errno);
}
if (namelist[0].n_value == 0) {
RF_ERRORMSG("Got bogus results from knlist() for CPU monitor\n");
return(EIO);
}
sysinfo_offset = namelist[0].n_value;
kmem_fd = open("/dev/kmem", O_RDONLY);
if (kmem_fd < 0) {
perror("/dev/kmem");
return(errno);
}
rc = rf_ShutdownCreate(listp, rf_ShutdownCpuMonitor, NULL);
if (rc) {
RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__,
__LINE__, rc);
rf_ShutdownCpuMonitor(NULL);
return(rc);
}
#endif /* AIX */
return(0);
}
void rf_start_cpu_monitor()
{
#ifdef __osf__
#ifndef KERNEL
if (table(TBL_SYSINFO, 0, &start, 1, sizeof(start)) != 1) {
printf("Unable to get sysinfo for cpu utilization monitor\n");
perror("start_cpu_monitor");
}
#else /* !KERNEL */
/* start.si_user = cp_time[CP_USER];
start.si_nice = cp_time[CP_NICE];
start.si_sys = cp_time[CP_SYS];
start.si_idle = cp_time[CP_IDLE];
start.wait = cp_time[CP_WAIT]; */
#endif /* !KERNEL */
#endif /* __osf__ */
#ifdef AIX
off_t off;
int rc;
off = lseek(kmem_fd, sysinfo_offset, SEEK_SET);
RF_ASSERT(off == sysinfo_offset);
rc = read(kmem_fd, &sysinfo_start, sizeof(struct sysinfo));
if (rc != sizeof(struct sysinfo)) {
RF_ERRORMSG2("Starting CPU monitor: rc=%d != %d\n", rc,
sizeof(struct sysinfo));
}
#endif /* AIX */
}
void rf_stop_cpu_monitor()
{
#ifdef __osf__
#ifndef KERNEL
if (table(TBL_SYSINFO, 0, &stop, 1, sizeof(stop)) != 1) {
printf("Unable to get sysinfo for cpu utilization monitor\n");
perror("stop_cpu_monitor");
}
#else /* !KERNEL */
/* stop.si_user = cp_time[CP_USER];
stop.si_nice = cp_time[CP_NICE];
stop.si_sys = cp_time[CP_SYS];
stop.si_idle = cp_time[CP_IDLE];
stop.wait = cp_time[CP_WAIT]; */
#endif /* !KERNEL */
#endif /* __osf__ */
#ifdef AIX
off_t off;
int rc;
off = lseek(kmem_fd, sysinfo_offset, SEEK_SET);
RF_ASSERT(off == sysinfo_offset);
rc = read(kmem_fd, &sysinfo_stop, sizeof(struct sysinfo));
if (rc != sizeof(struct sysinfo)) {
RF_ERRORMSG2("Stopping CPU monitor: rc=%d != %d\n", rc,
sizeof(struct sysinfo));
}
#endif /* AIX */
}
void rf_print_cpu_util(s)
char *s;
{
#ifdef __osf__
long totalticks, idleticks;
idleticks = stop.si_idle - start.si_idle + stop.wait - start.wait;
totalticks = stop.si_user - start.si_user + stop.si_nice - start.si_nice +
stop.si_sys - start.si_sys + idleticks;
printf("CPU utilization during %s was %d %%\n", s, 100 - 100*idleticks/totalticks);
#endif /* __osf__ */
#ifdef AIX
long idle;
/* XXX compute a percentage here */
idle = (long)(sysinfo_stop.cpu[CPU_IDLE] - sysinfo_start.cpu[CPU_IDLE]);
printf("%ld idle ticks during %s.\n", idle, s);
#endif /* AIX */
}
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