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 <getopt.h>
41 #include <unistd.h>
42 #include <stdio.h>
43 #include <stdlib.h>
44 #include <signal.h>
45 #include <string.h>
46 #include <ctype.h>
47 #include <poll.h>
48 #include "powertop.h"
49 
50 /*
51  * Global variables, see powertop.h for comments and extern declarations.
52  * These are ordered by type, grouped by usage.
53  */
54 int			g_bit_depth;
55 int			g_total_events, g_top_events;
56 int			g_npstates, g_max_cstate, g_longest_cstate;
57 uint_t			g_features;
58 uint_t			g_ncpus;
59 uint_t			g_ncpus_observed;
60 
61 processorid_t		*g_cpu_table;
62 
63 double			g_interval_length;
64 hrtime_t		g_total_c_time;
65 
66 uchar_t			g_op_mode;
67 boolean_t		g_gui;
68 uint_t			g_observed_cpu;
69 
70 event_info_t		g_event_info[EVENT_NUM_MAX];
71 state_info_t		g_cstate_info[NSTATES];
72 freq_state_info_t	g_pstate_info[NSTATES];
73 cpu_power_info_t	*g_cpu_power_states;
74 
75 boolean_t		g_turbo_supported;
76 boolean_t		g_sig_resize;
77 
78 uint_t			g_argc;
79 char			**g_argv;
80 
81 static const int	true = 1;
82 
83 void
84 pt_sig_handler(int sig)
85 {
86 	switch (sig) {
87 	case SIGWINCH:
88 		g_sig_resize = B_TRUE;
89 		break;
90 	}
91 }
92 
93 int
94 main(int argc, char **argv)
95 {
96 	double		interval, interval_usr;
97 	hrtime_t	interval_start;
98 	int		index2 = 0, c, dump_count = 0;
99 	char		*endptr, key;
100 	boolean_t	root_user = B_FALSE;
101 	struct pollfd	pollset;
102 
103 	static struct option opts[] = {
104 		{ "dump", 1, NULL, 'd' },
105 		{ "time", 1, NULL, 't' },
106 		{ "help", 0, NULL, 'h' },
107 		{ "cpu", 1, NULL, 'c' },
108 		{ "verbose", 0, NULL, 'v' },
109 		{ 0, 0, NULL, 0 }
110 	};
111 
112 	pt_set_progname(argv[0]);
113 
114 	/*
115 	 * Enumerate the system's CPUs, populate cpu_table, g_ncpus
116 	 */
117 	if ((g_ncpus = g_ncpus_observed = pt_enumerate_cpus()) == 0)
118 		exit(EXIT_FAILURE);
119 
120 	if ((g_bit_depth = pt_get_bit_depth()) < 0)
121 		exit(EXIT_FAILURE);
122 
123 	g_features = 0;
124 	interval = interval_usr = INTERVAL_DEFAULT;
125 	g_op_mode = PT_MODE_DEFAULT;
126 	g_max_cstate = 0;
127 	g_argv = NULL;
128 	g_argc = 0;
129 	g_observed_cpu = 0;
130 	g_turbo_supported = B_FALSE;
131 	g_sig_resize = B_FALSE;
132 	g_curr_sugg = NULL;
133 
134 	while ((c = getopt_long(argc, argv, "d:t:hvc:", opts, &index2))
135 	    != EOF) {
136 		if (c == -1)
137 			break;
138 
139 		switch (c) {
140 		case 'd':
141 			if (PT_ON_DUMP) {
142 				pt_usage();
143 				exit(EXIT_USAGE);
144 			}
145 
146 			g_op_mode |= PT_MODE_DUMP;
147 			g_gui = B_FALSE;
148 			dump_count = (int)strtod(optarg, &endptr);
149 
150 			if (dump_count <= 0 || *endptr != '\0') {
151 				pt_usage();
152 				exit(EXIT_USAGE);
153 			}
154 
155 			break;
156 		case 't':
157 			if (PT_ON_TIME) {
158 				pt_usage();
159 				exit(EXIT_USAGE);
160 			}
161 
162 			g_op_mode |= PT_MODE_TIME;
163 			interval = interval_usr = (double)strtod(optarg,
164 			    &endptr);
165 
166 			if (*endptr != '\0' || interval < 1 ||
167 			    interval > INTERVAL_MAX) {
168 				pt_usage();
169 				exit(EXIT_USAGE);
170 			}
171 
172 			break;
173 		case 'v':
174 			if (PT_ON_CPU || PT_ON_VERBOSE) {
175 				pt_usage();
176 				exit(EXIT_USAGE);
177 			}
178 
179 			g_op_mode |= PT_MODE_VERBOSE;
180 			break;
181 		case 'c':
182 			if (PT_ON_CPU || PT_ON_VERBOSE) {
183 				pt_usage();
184 				exit(EXIT_USAGE);
185 			}
186 
187 			g_op_mode |= PT_MODE_CPU;
188 			g_observed_cpu = (uint_t)strtod(optarg, &endptr);
189 
190 			if (g_observed_cpu >= g_ncpus) {
191 				pt_usage();
192 				exit(EXIT_USAGE);
193 			}
194 
195 			g_argc = 1;
196 			g_ncpus_observed = 1;
197 
198 			if ((g_argv = malloc(sizeof (char *))) == NULL)
199 				return (EXIT_FAILURE);
200 
201 			if ((*g_argv = malloc(sizeof (char) * 5)) == NULL)
202 				return (EXIT_FAILURE);
203 
204 			(void) snprintf(*g_argv, 5, "%d\0", g_observed_cpu);
205 			break;
206 		case 'h':
207 			pt_usage();
208 			exit(EXIT_SUCCESS);
209 		default:
210 			pt_usage();
211 			exit(EXIT_USAGE);
212 		}
213 	}
214 
215 	if (optind < argc) {
216 		pt_usage();
217 		exit(EXIT_USAGE);
218 	}
219 
220 	(void) printf("%s   %s\n\n", TITLE, COPYRIGHT_INTEL);
221 
222 	(void) printf("Collecting data for %.2f second(s) \n",
223 	    (float)interval);
224 
225 	/* Prepare P-state statistics */
226 	if (pt_cpufreq_stat_prepare() == 0)
227 		g_features |= FEATURE_PSTATE;
228 
229 	/* Prepare C-state statistics */
230 	if (pt_cpuidle_stat_prepare() == 0)
231 		g_features |= FEATURE_CSTATE;
232 	else
233 		/*
234 		 * PowerTop was unable to run a DTrace program,
235 		 * most likely for lack of permissions.
236 		 */
237 		exit(EXIT_FAILURE);
238 
239 	/* Prepare event statistics */
240 	if (pt_events_stat_prepare() != -1)
241 		g_features |= FEATURE_EVENTS;
242 
243 	/*
244 	 * If the system is running on battery, find out what's
245 	 * the kstat module for it
246 	 */
247 	pt_battery_mod_lookup();
248 
249 	/* Prepare turbo statistics */
250 	if (pt_turbo_stat_prepare() == 0)
251 		g_features |= FEATURE_TURBO;
252 
253 	/*
254 	 * Initialize the display.
255 	 */
256 	if (!PT_ON_DUMP) {
257 		pt_display_init_curses();
258 		pt_display_setup(B_FALSE);
259 		(void) signal(SIGWINCH, pt_sig_handler);
260 
261 		pt_display_title_bar();
262 		pt_display_status_bar();
263 
264 		g_gui = B_TRUE;
265 		pollset.fd = STDIN_FILENO;
266 		pollset.events = POLLIN;
267 	}
268 
269 	/*
270 	 * Installs the initial suggestions, running as root and turning CPU
271 	 * power management ON.
272 	 */
273 	if (geteuid() != 0) {
274 		pt_sugg_as_root();
275 	} else {
276 		root_user = B_TRUE;
277 		pt_cpufreq_suggest();
278 	}
279 
280 	while (true) {
281 		key = 0;
282 
283 		if (g_sig_resize)
284 			pt_display_resize();
285 
286 		interval_start = gethrtime();
287 
288 		if (!PT_ON_DUMP) {
289 			if (poll(&pollset, (nfds_t)1,
290 			    (int)(interval * MILLISEC)) > 0)
291 				(void) read(STDIN_FILENO, &key, 1);
292 		} else {
293 			(void) sleep((int)interval);
294 		}
295 
296 		g_interval_length = (double)(gethrtime() - interval_start)
297 		    /NANOSEC;
298 
299 		g_top_events = 0;
300 		g_total_events = 0;
301 
302 		(void) memset(g_event_info, 0,
303 		    EVENT_NUM_MAX * sizeof (event_info_t));
304 		(void) memset(g_cstate_info, 0,
305 		    NSTATES * sizeof (state_info_t));
306 
307 		/* Collect idle state transition stats */
308 		if (g_features & FEATURE_CSTATE &&
309 		    pt_cpuidle_stat_collect(g_interval_length) < 0) {
310 			/* Reinitialize C-state statistics */
311 			if (pt_cpuidle_stat_prepare() != 0)
312 				exit(EXIT_FAILURE);
313 
314 			continue;
315 		}
316 
317 		/* Collect frequency change stats */
318 		if (g_features & FEATURE_PSTATE &&
319 		    pt_cpufreq_stat_collect(g_interval_length) < 0) {
320 			/* Reinitialize P-state statistics */
321 			if (pt_cpufreq_stat_prepare() != 0)
322 				exit(EXIT_FAILURE);
323 
324 			continue;
325 		}
326 
327 		/* Collect event statistics */
328 		if (g_features & FEATURE_EVENTS &&
329 		    pt_events_stat_collect() < 0) {
330 			/* Reinitialize event statistics */
331 			if (pt_events_stat_prepare() != 0)
332 				exit(EXIT_FAILURE);
333 
334 			continue;
335 		}
336 
337 		/* Collect turbo statistics */
338 		if (g_features & FEATURE_TURBO &&
339 		    pt_turbo_stat_collect() < 0)
340 			exit(EXIT_FAILURE);
341 
342 		/* Show CPU power states */
343 		pt_display_states();
344 
345 		/* Show wakeups events affecting PM */
346 		if (g_features & FEATURE_EVENTS) {
347 			pt_display_wakeups(g_interval_length);
348 			pt_display_events(g_interval_length);
349 		}
350 
351 		pt_battery_print();
352 
353 		if (key && !PT_ON_DUMP) {
354 			switch (toupper(key)) {
355 			case 'Q':
356 				exit(EXIT_SUCCESS);
357 				break;
358 
359 			case 'R':
360 				interval = 3;
361 				break;
362 			}
363 
364 			/*
365 			 * Check if the user has activated the current
366 			 * suggestion.
367 			 */
368 			if (g_curr_sugg != NULL &&
369 			    toupper(key) == g_curr_sugg->key &&
370 			    g_curr_sugg->func)
371 				g_curr_sugg->func();
372 		}
373 
374 		if (dump_count)
375 			dump_count--;
376 
377 		/* Exits if user requested a dump */
378 		if (PT_ON_DUMP && !dump_count)
379 			exit(EXIT_SUCCESS);
380 
381 		/* No key pressed, will suggest something */
382 		if (!key && !dump_count)
383 			pt_sugg_pick();
384 
385 		/* Refresh display */
386 		if (!PT_ON_DUMP)
387 			pt_display_update();
388 
389 		if (root_user)
390 			pt_cpufreq_suggest();
391 
392 		/*
393 		 * Update the interval based on how long the CPU was in the
394 		 * longest c-state during the last snapshot. If the user
395 		 * specified an interval we skip this bit and keep it fixed.
396 		 */
397 		if (g_features & FEATURE_CSTATE && !PT_ON_TIME &&
398 		    g_longest_cstate > 0 &&
399 		    g_cstate_info[g_longest_cstate].events > 0) {
400 			double deep_idle_res = (((double)
401 			    g_cstate_info[g_longest_cstate].total_time/MICROSEC
402 			    /g_ncpus)/g_cstate_info[g_longest_cstate].events);
403 
404 			if (deep_idle_res < INTERVAL_DEFAULT ||
405 			    (g_total_events/interval) < 1)
406 				interval = INTERVAL_DEFAULT;
407 			else
408 				interval = INTERVAL_UPDATE(deep_idle_res);
409 		} else {
410 			/*
411 			 * Restore interval after a refresh.
412 			 */
413 			if (key)
414 				interval = interval_usr;
415 		}
416 	}
417 
418 	return (EXIT_SUCCESS);
419 }
420