usr/src/cmd/powertop/common/util.c

   1 /*
   2  * Copyright 2009, Intel Corporation
   3  * Copyright 2009, Sun Microsystems, Inc
   4  *
   5  * This file is part of PowerTOP
   6  *
   7  * This program file is free software; you can redistribute it and/or modify it
   8  * under the terms of the GNU General Public License as published by the
   9  * Free Software Foundation; version 2 of the License.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program in a file named COPYING; if not, write to the
  18  * Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor,
  20  * Boston, MA 02110-1301 USA
  21  *
  22  * Authors:
  23  *      Arjan van de Ven <arjan@linux.intel.com>
  24  *      Eric C Saxe <eric.saxe@sun.com>
  25  *      Aubrey Li <aubrey.li@intel.com>
  26  */
  27
  28 /*
  29  * GPL Disclaimer
  30  *
  31  * For the avoidance of doubt, except that if any license choice other
  32  * than GPL or LGPL is available it will apply instead, Sun elects to
  33  * use only the General Public License version 2 (GPLv2) at this time
  34  * for any software where a choice of GPL license versions is made
  35  * available with the language indicating that GPLv2 or any later
  36  * version may be used, or where a choice of which version of the GPL
  37  * is applied is otherwise unspecified.
  38  */
  39
  40 #include <stdarg.h>
  41 #include <stdlib.h>
  42 #include <libgen.h>
  43 #include <unistd.h>
  44 #include <strings.h>
  45 #include <sys/systeminfo.h>
  46 #include <kstat.h>
  47 #include <errno.h>
  48 #include "powertop.h"
  49
  50 static char     PROG_FMT[] = "%s: ";
  51 static char     ERR_FMT[] = ": %s";
  52 static char     *progname;
  53
  54 void
  55 pt_set_progname(char *name)
  56 {
  57         progname = basename(name);
  58 }
  59
  60 /*PRINTFLIKE1*/
  61 void
  62 pt_error(char *format, ...)
  63 {
  64         int     err = errno;
  65         va_list alist;
  66
  67         if (g_gui)
  68                 return;
  69
  70         if (progname != NULL)
  71                 (void) fprintf(stderr, PROG_FMT, progname);
  72
  73         va_start(alist, format);
  74         (void) vfprintf(stderr, format, alist);
  75         va_end(alist);
  76
  77         if (strchr(format, '\n') == NULL)
  78                 (void) fprintf(stderr, ERR_FMT, strerror(err));
  79 }
  80
  81 /*
  82  * Returns the number of online CPUs.
  83  */
  84 uint_t
  85 pt_enumerate_cpus(void)
  86 {
  87         int     cpuid;
  88         int     max, cpus_conf;
  89         uint_t  ncpus = 0;
  90
  91         max             = sysconf(_SC_CPUID_MAX);
  92         cpus_conf       = sysconf(_SC_NPROCESSORS_CONF);
  93
  94         /* Fall back to one CPU if any of the sysconf calls above failed */
  95         if (max == -1 || cpus_conf == -1) {
  96                 max = cpus_conf = 1;
  97         }
  98
  99         if ((g_cpu_table = malloc(cpus_conf * sizeof (processorid_t))) == NULL)
 100                 return (0);
 101
 102         for (cpuid = 0; cpuid < max; cpuid++) {
 103                 if (p_online(cpuid, P_STATUS) != -1) {
 104                         g_cpu_table[ncpus] = cpuid;
 105                         ncpus++;
 106                 }
 107         }
 108         return (ncpus);
 109 }
 110
 111 void
 112 pt_usage(void)
 113 {
 114         (void) fprintf(stderr, "%s   %s\n\n", TITLE, COPYRIGHT_INTEL);
 115         (void) fprintf(stderr, "usage: powertop [option]\n");
 116         (void) fprintf(stderr, "  -d, --dump [count]    Read wakeups count "
 117             "times and print list of top offenders\n");
 118         (void) fprintf(stderr, "  -t, --time [interval] Default time to gather "
 119             "data in seconds [1-30s]\n");
 120         (void) fprintf(stderr, "  -v, --verbose         Verbose mode, reports "
 121             "kernel cyclic activity\n");
 122         (void) fprintf(stderr, "  -c, --cpu [CPU]       Only observe a specific"
 123             " CPU\n");
 124         (void) fprintf(stderr, "  -h, --help            Show this help "
 125             "message\n");
 126 }
 127
 128 int
 129 pt_get_bit_depth(void)
 130 {
 131         /*
 132          * This little routine was derived from isainfo.c to look up
 133          * the system's bit depth. It feeds a 10 byte long buffer to
 134          * sysinfo (we only need the first word, sysinfo truncates and
 135          * \0 terminates the rest) from which we figure out which isa
 136          * we're running on.
 137          */
 138         char    buf[BIT_DEPTH_BUF];
 139
 140         if (sysinfo(SI_ARCHITECTURE_64, buf, BIT_DEPTH_BUF) == -1)
 141                 if (sysinfo(SI_ARCHITECTURE_32, buf, BIT_DEPTH_BUF) == -1)
 142                         return (-2);
 143
 144         if (strcmp(buf, "sparc") == 0 || strcmp(buf, "i386") == 0)
 145                 return (32);
 146
 147         if (strcmp(buf, "sparcv9") == 0 || strcmp(buf, "amd64") == 0)
 148                 return (64);
 149
 150         return (-3);
 151 }
 152
 153 /*
 154  * Simple integer comparison routine for the event report qsort(3C).
 155  */
 156 int
 157 pt_event_compare(const void *p1, const void *p2)
 158 {
 159         event_info_t i = *((event_info_t *)p1);
 160         event_info_t j = *((event_info_t *)p2);
 161
 162         if (i.total_count > j.total_count)
 163                 return (-1);
 164
 165         if (i.total_count < j.total_count)
 166                 return (1);
 167
 168         return (0);
 169 }