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
pt_set_progname(char * name)55 pt_set_progname(char *name)
56 {
57 progname = basename(name);
58 }
59
60 /*PRINTFLIKE1*/
61 void
pt_error(char * format,...)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
pt_enumerate_cpus(void)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
pt_usage(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
pt_get_bit_depth(void)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
pt_event_compare(const void * p1,const void * p2)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 }
170