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/* $OpenBSD: rf_cpuutil.c,v 1.2 1999/02/16 00:02:27 niklas Exp $ */
/* $NetBSD: rf_cpuutil.c,v 1.3 1999/02/05 00:06:07 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
*/
#include "rf_cpuutil.h"
#include "rf_types.h"
#include "rf_general.h"
#include "rf_shutdown.h"
#include "rf_sys.h"
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 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 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 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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