121 lines
2.9 KiB
C
121 lines
2.9 KiB
C
/* $NetBSD: rf_cpuutil.c,v 1.3 1999/02/05 00:06:07 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Authors: Mark Holland, Jim Zelenka
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* rf_cpuutil.c
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*
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* track cpu utilization
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*/
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#include "rf_cpuutil.h"
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#include "rf_types.h"
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#include "rf_general.h"
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#include "rf_shutdown.h"
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#include "rf_sys.h"
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int
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rf_ConfigureCpuMonitor(listp)
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RF_ShutdownList_t **listp;
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{
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#ifdef AIX
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int rc;
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rc = knlist(namelist, 1, sizeof(struct nlist));
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if (rc) {
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RF_ERRORMSG("Could not knlist() to config CPU monitor\n");
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return (errno);
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}
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if (namelist[0].n_value == 0) {
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RF_ERRORMSG("Got bogus results from knlist() for CPU monitor\n");
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return (EIO);
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}
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sysinfo_offset = namelist[0].n_value;
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kmem_fd = open("/dev/kmem", O_RDONLY);
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if (kmem_fd < 0) {
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perror("/dev/kmem");
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return (errno);
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}
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rc = rf_ShutdownCreate(listp, rf_ShutdownCpuMonitor, NULL);
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if (rc) {
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RF_ERRORMSG3("Unable to add to shutdown list file %s line %d rc=%d\n", __FILE__,
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__LINE__, rc);
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rf_ShutdownCpuMonitor(NULL);
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return (rc);
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}
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#endif /* AIX */
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return (0);
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}
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void
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rf_start_cpu_monitor()
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{
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#ifdef AIX
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off_t off;
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int rc;
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off = lseek(kmem_fd, sysinfo_offset, SEEK_SET);
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RF_ASSERT(off == sysinfo_offset);
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rc = read(kmem_fd, &sysinfo_start, sizeof(struct sysinfo));
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if (rc != sizeof(struct sysinfo)) {
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RF_ERRORMSG2("Starting CPU monitor: rc=%d != %d\n", rc,
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sizeof(struct sysinfo));
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}
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#endif /* AIX */
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}
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void
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rf_stop_cpu_monitor()
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{
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#ifdef AIX
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off_t off;
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int rc;
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off = lseek(kmem_fd, sysinfo_offset, SEEK_SET);
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RF_ASSERT(off == sysinfo_offset);
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rc = read(kmem_fd, &sysinfo_stop, sizeof(struct sysinfo));
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if (rc != sizeof(struct sysinfo)) {
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RF_ERRORMSG2("Stopping CPU monitor: rc=%d != %d\n", rc,
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sizeof(struct sysinfo));
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}
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#endif /* AIX */
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}
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void
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rf_print_cpu_util(s)
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char *s;
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{
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#ifdef AIX
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long idle;
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/* XXX compute a percentage here */
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idle = (long) (sysinfo_stop.cpu[CPU_IDLE] - sysinfo_start.cpu[CPU_IDLE]);
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printf("%ld idle ticks during %s.\n", idle, s);
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#endif /* AIX */
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}
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