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 char			*optarg;
82 
83 static const int	true = 1;
84 
85 void
86 pt_sig_handler(int sig)
87 {
88 	switch (sig) {
89 	case SIGWINCH:
90 		g_sig_resize = B_TRUE;
91 		break;
92 	}
93 }
94 
95 int
96 main(int argc, char **argv)
97 {
98 	double		interval, interval_usr;
99 	hrtime_t 	interval_start;
100 	int		index2 = 0, c, dump_count = 0;
101 	char		*endptr, key;
102 	boolean_t	root_user = B_FALSE;
103 	struct pollfd	pollset;
104 
105 	static struct option opts[] = {
106 		{ "dump", 1, NULL, 'd' },
107 		{ "time", 1, NULL, 't' },
108 		{ "help", 0, NULL, 'h' },
109 		{ "cpu", 1, NULL, 'c' },
110 		{ "verbose", 0, NULL, 'v' },
111 		{ 0, 0, NULL, 0 }
112 	};
113 
114 	pt_set_progname(argv[0]);
115 
116 	/*
117 	 * Enumerate the system's CPUs, populate cpu_table, g_ncpus
118 	 */
119 	if ((g_ncpus = g_ncpus_observed = pt_enumerate_cpus()) == 0)
120 		exit(EXIT_FAILURE);
121 
122 	if ((g_bit_depth = pt_get_bit_depth()) < 0)
123 		exit(EXIT_FAILURE);
124 
125 	g_features = 0;
126 	interval = interval_usr = INTERVAL_DEFAULT;
127 	g_op_mode = PT_MODE_DEFAULT;
128 	g_max_cstate = 0;
129 	g_argv = NULL;
130 	g_argc = 0;
131 	g_observed_cpu = 0;
132 	g_turbo_supported = B_FALSE;
133 	g_sig_resize = B_FALSE;
134 	g_curr_sugg = NULL;
135 
136 	while ((c = getopt_long(argc, argv, "d:t:hvc:", opts, &index2))
137 	    != EOF) {
138 		if (c == -1)
139 			break;
140 
141 		switch (c) {
142 		case 'd':
143 			if (PT_ON_DUMP) {
144 				pt_usage();
145 				exit(EXIT_USAGE);
146 			}
147 
148 			g_op_mode |= PT_MODE_DUMP;
149 			g_gui = B_FALSE;
150 			dump_count = (int)strtod(optarg, &endptr);
151 
152 			if (dump_count <= 0 || *endptr != NULL) {
153 				pt_usage();
154 				exit(EXIT_USAGE);
155 			}
156 
157 			break;
158 		case 't':
159 			if (PT_ON_TIME) {
160 				pt_usage();
161 				exit(EXIT_USAGE);
162 			}
163 
164 			g_op_mode |= PT_MODE_TIME;
165 			interval = interval_usr = (double)strtod(optarg,
166 			    &endptr);
167 
168 			if (*endptr != NULL || interval < 1 ||
169 			    interval > INTERVAL_MAX) {
170 				pt_usage();
171 				exit(EXIT_USAGE);
172 			}
173 
174 			break;
175 		case 'v':
176 			if (PT_ON_CPU || PT_ON_VERBOSE) {
177 				pt_usage();
178 				exit(EXIT_USAGE);
179 			}
180 
181 			g_op_mode |= PT_MODE_VERBOSE;
182 			break;
183 		case 'c':
184 			if (PT_ON_CPU || PT_ON_VERBOSE) {
185 				pt_usage();
186 				exit(EXIT_USAGE);
187 			}
188 
189 			g_op_mode |= PT_MODE_CPU;
190 			g_observed_cpu = (uint_t)strtod(optarg, &endptr);
191 
192 			if (g_observed_cpu >= g_ncpus) {
193 				pt_usage();
194 				exit(EXIT_USAGE);
195 			}
196 
197 			g_argc = 1;
198 			g_ncpus_observed = 1;
199 
200 			if ((g_argv = malloc(sizeof (char *))) == NULL)
201 				return (EXIT_FAILURE);
202 
203 			if ((*g_argv = malloc(sizeof (char) * 5)) == NULL)
204 				return (EXIT_FAILURE);
205 
206 			(void) snprintf(*g_argv, 5, "%d\0", g_observed_cpu);
207 			break;
208 		case 'h':
209 			pt_usage();
210 			exit(EXIT_SUCCESS);
211 		default:
212 			pt_usage();
213 			exit(EXIT_USAGE);
214 		}
215 	}
216 
217 	if (optind < argc) {
218 		pt_usage();
219 		exit(EXIT_USAGE);
220 	}
221 
222 	(void) printf("%s   %s\n\n", TITLE, COPYRIGHT_INTEL);
223 
224 	(void) printf("Collecting data for %.2f second(s) \n",
225 	    (float)interval);
226 
227 	/* Prepare P-state statistics */
228 	if (pt_cpufreq_stat_prepare() == 0)
229 		g_features |= FEATURE_PSTATE;
230 
231 	/* Prepare C-state statistics */
232 	if (pt_cpuidle_stat_prepare() == 0)
233 		g_features |= FEATURE_CSTATE;
234 	else
235 		/*
236 		 * PowerTop was unable to run a DTrace program,
237 		 * most likely for lack of permissions.
238 		 */
239 		exit(EXIT_FAILURE);
240 
241 	/* Prepare event statistics */
242 	if (pt_events_stat_prepare() != -1)
243 		g_features |= FEATURE_EVENTS;
244 
245 	/*
246 	 * If the system is running on battery, find out what's
247 	 * the kstat module for it
248 	 */
249 	pt_battery_mod_lookup();
250 
251 	/* Prepare turbo statistics */
252 	if (pt_turbo_stat_prepare() == 0)
253 		g_features |= FEATURE_TURBO;
254 
255 	/*
256 	 * Initialize the display.
257 	 */
258 	if (!PT_ON_DUMP) {
259 		pt_display_init_curses();
260 		pt_display_setup(B_FALSE);
261 		(void) signal(SIGWINCH, pt_sig_handler);
262 
263 		pt_display_title_bar();
264 		pt_display_status_bar();
265 
266 		g_gui = B_TRUE;
267 		pollset.fd = STDIN_FILENO;
268 		pollset.events = POLLIN;
269 	}
270 
271 	/*
272 	 * Installs the initial suggestions, running as root and turning CPU
273 	 * power management ON.
274 	 */
275 	if (geteuid() != 0) {
276 		pt_sugg_as_root();
277 	} else {
278 		root_user = B_TRUE;
279 		pt_cpufreq_suggest();
280 	}
281 
282 	while (true) {
283 		key = 0;
284 
285 		if (g_sig_resize)
286 			pt_display_resize();
287 
288 		interval_start = gethrtime();
289 
290 		if (!PT_ON_DUMP) {
291 			if (poll(&pollset, (nfds_t)1,
292 			    (int)(interval * MILLISEC)) > 0)
293 				(void) read(STDIN_FILENO, &key, 1);
294 		} else {
295 			(void) sleep((int)interval);
296 		}
297 
298 		g_interval_length = (double)(gethrtime() - interval_start)
299 		    /NANOSEC;
300 
301 		g_top_events = 0;
302 		g_total_events = 0;
303 
304 		(void) memset(g_event_info, 0,
305 		    EVENT_NUM_MAX * sizeof (event_info_t));
306 		(void) memset(g_cstate_info, 0,
307 		    NSTATES * sizeof (state_info_t));
308 
309 		/* Collect idle state transition stats */
310 		if (g_features & FEATURE_CSTATE &&
311 		    pt_cpuidle_stat_collect(g_interval_length) < 0) {
312 			/* Reinitialize C-state statistics */
313 			if (pt_cpuidle_stat_prepare() != 0)
314 				exit(EXIT_FAILURE);
315 
316 			continue;
317 		}
318 
319 		/* Collect frequency change stats */
320 		if (g_features & FEATURE_PSTATE &&
321 		    pt_cpufreq_stat_collect(g_interval_length) < 0) {
322 			/* Reinitialize P-state statistics */
323 			if (pt_cpufreq_stat_prepare() != 0)
324 				exit(EXIT_FAILURE);
325 
326 			continue;
327 		}
328 
329 		/* Collect event statistics */
330 		if (g_features & FEATURE_EVENTS &&
331 		    pt_events_stat_collect() < 0) {
332 			/* Reinitialize event statistics */
333 			if (pt_events_stat_prepare() != 0)
334 				exit(EXIT_FAILURE);
335 
336 			continue;
337 		}
338 
339 		/* Collect turbo statistics */
340 		if (g_features & FEATURE_TURBO &&
341 		    pt_turbo_stat_collect() < 0)
342 			exit(EXIT_FAILURE);
343 
344 		/* Show CPU power states */
345 		pt_display_states();
346 
347 		/* Show wakeups events affecting PM */
348 		if (g_features & FEATURE_EVENTS) {
349 			pt_display_wakeups(g_interval_length);
350 			pt_display_events(g_interval_length);
351 		}
352 
353 		pt_battery_print();
354 
355 		if (key && !PT_ON_DUMP) {
356 			switch (toupper(key)) {
357 			case 'Q':
358 				exit(EXIT_SUCCESS);
359 				break;
360 
361 			case 'R':
362 				interval = 3;
363 				break;
364 			}
365 
366 			/*
367 			 * Check if the user has activated the current
368 			 * suggestion.
369 			 */
370 			if (g_curr_sugg != NULL &&
371 			    toupper(key) == g_curr_sugg->key &&
372 			    g_curr_sugg->func)
373 				g_curr_sugg->func();
374 		}
375 
376 		if (dump_count)
377 			dump_count--;
378 
379 		/* Exits if user requested a dump */
380 		if (PT_ON_DUMP && !dump_count)
381 			exit(EXIT_SUCCESS);
382 
383 		/* No key pressed, will suggest something */
384 		if (!key && !dump_count)
385 			pt_sugg_pick();
386 
387 		/* Refresh display */
388 		if (!PT_ON_DUMP)
389 			pt_display_update();
390 
391 		if (root_user)
392 			pt_cpufreq_suggest();
393 
394 		/*
395 		 * Update the interval based on how long the CPU was in the
396 		 * longest c-state during the last snapshot. If the user
397 		 * specified an interval we skip this bit and keep it fixed.
398 		 */
399 		if (g_features & FEATURE_CSTATE && !PT_ON_TIME &&
400 		    g_longest_cstate > 0) {
401 			double deep_idle_res = (((double)
402 			    g_cstate_info[g_longest_cstate].total_time/MICROSEC
403 			    /g_ncpus)/g_cstate_info[g_longest_cstate].events);
404 
405 			if (deep_idle_res < INTERVAL_DEFAULT ||
406 			    (g_total_events/interval) < 1)
407 				interval = INTERVAL_DEFAULT;
408 			else
409 				interval = INTERVAL_UPDATE(deep_idle_res);
410 		} else {
411 			/*
412 			 * Restore interval after a refresh.
413 			 */
414 			if (key)
415 				interval = interval_usr;
416 		}
417 	}
418 
419 	return (EXIT_SUCCESS);
420 }
421