summaryrefslogtreecommitdiff
path: root/tools/power/cpupower/utils/idle_monitor/cpupower-monitor.c
blob: dd8e1ea6e6f20a2c6136688cc3f4d7af9b134358 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
/*
 *  (C) 2010,2011       Thomas Renninger <trenn@suse.de>, Novell Inc.
 *
 *  Licensed under the terms of the GNU GPL License version 2.
 *
 *  Output format inspired by Len Brown's <lenb@kernel.org> turbostat tool.
 *
 */


#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <signal.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <libgen.h>

#include "idle_monitor/cpupower-monitor.h"
#include "idle_monitor/idle_monitors.h"
#include "helpers/helpers.h"

/* Define pointers to all monitors.  */
#define DEF(x) & x ## _monitor ,
struct cpuidle_monitor *all_monitors[] = {
#include "idle_monitors.def"
0
};

static struct cpuidle_monitor *monitors[MONITORS_MAX];
static unsigned int avail_monitors;

static char *progname;

enum operation_mode_e { list = 1, show, show_all };
static int mode;
static int interval = 1;
static char *show_monitors_param;
static struct cpupower_topology cpu_top;

/* ToDo: Document this in the manpage */
static char range_abbr[RANGE_MAX] = { 'T', 'C', 'P', 'M', };

long long timespec_diff_us(struct timespec start, struct timespec end)
{
	struct timespec temp;
	if ((end.tv_nsec - start.tv_nsec) < 0) {
		temp.tv_sec = end.tv_sec - start.tv_sec - 1;
		temp.tv_nsec = 1000000000 + end.tv_nsec - start.tv_nsec;
	} else {
		temp.tv_sec = end.tv_sec - start.tv_sec;
		temp.tv_nsec = end.tv_nsec - start.tv_nsec;
	}
	return (temp.tv_sec * 1000000) + (temp.tv_nsec / 1000);
}

void monitor_help(void)
{
	printf(_("cpupower monitor: [-m <mon1>,[<mon2>],.. ] command\n"));
	printf(_("cpupower monitor: [-m <mon1>,[<mon2>],.. ] [ -i interval_sec ]\n"));
	printf(_("cpupower monitor: -l\n"));
	printf(_("\t command: pass an arbitrary command to measure specific workload\n"));
	printf(_("\t -i: time intervall to measure for in seconds (default 1)\n"));
	printf(_("\t -l: list available CPU sleep monitors (for use with -m)\n"));
	printf(_("\t -m: show specific CPU sleep monitors only (in same order)\n"));
	printf(_("\t -h: print this help\n"));
	printf("\n");
	printf(_("only one of: -l, -m are allowed\nIf none of them is passed,"));
	printf(_(" all supported monitors are shown\n"));
}

void print_n_spaces(int n)
{
	int x;
	for (x = 0; x < n; x++)
		printf(" ");
}

/* size of s must be at least n + 1 */
int fill_string_with_spaces(char *s, int n)
{
	int len = strlen(s);
	if (len > n)
		return -1;
	for (; len < n; len++)
		s[len] = ' ';
	s[len] = '\0';
	return 0;
}

void print_header(int topology_depth)
{
	int unsigned mon;
	int state, need_len, pr_mon_len;
	cstate_t s;
	char buf[128] = "";
	int percent_width = 4;

	fill_string_with_spaces(buf, topology_depth * 5 - 1);
	printf("%s|", buf);

	for (mon = 0; mon < avail_monitors; mon++) {
		pr_mon_len = 0;
		need_len = monitors[mon]->hw_states_num * (percent_width + 3)
			- 1;
		if (mon != 0) {
			printf("|| ");
			need_len--;
		}
		sprintf(buf, "%s", monitors[mon]->name);
		fill_string_with_spaces(buf, need_len);
		printf("%s", buf);
	}
	printf("\n");

	if (topology_depth > 2)
		printf("PKG |");
	if (topology_depth > 1)
		printf("CORE|");
	if (topology_depth > 0)
		printf("CPU |");

	for (mon = 0; mon < avail_monitors; mon++) {
		if (mon != 0)
			printf("|| ");
		else
			printf(" ");
		for (state = 0; state < monitors[mon]->hw_states_num; state++) {
			if (state != 0)
				printf(" | ");
			s = monitors[mon]->hw_states[state];
			sprintf(buf, "%s", s.name);
			fill_string_with_spaces(buf, percent_width);
			printf("%s", buf);
		}
		printf(" ");
	}
	printf("\n");
}


void print_results(int topology_depth, int cpu)
{
	unsigned int mon;
	int state, ret;
	double percent;
	unsigned long long result;
	cstate_t s;

	if (topology_depth > 2)
		printf("%4d|", cpu_top.core_info[cpu].pkg);
	if (topology_depth > 1)
		printf("%4d|", cpu_top.core_info[cpu].core);
	if (topology_depth > 0)
		printf("%4d|", cpu_top.core_info[cpu].cpu);

	for (mon = 0; mon < avail_monitors; mon++) {
		if (mon != 0)
			printf("||");

		for (state = 0; state < monitors[mon]->hw_states_num; state++) {
			if (state != 0)
				printf("|");

			s = monitors[mon]->hw_states[state];

			if (s.get_count_percent) {
				ret = s.get_count_percent(s.id, &percent,
						  cpu_top.core_info[cpu].cpu);
				if (ret)
					printf("******");
				else if (percent >= 100.0)
					printf("%6.1f", percent);
				else
					printf("%6.2f", percent);
			} else if (s.get_count) {
				ret = s.get_count(s.id, &result,
						  cpu_top.core_info[cpu].cpu);
				if (ret)
					printf("******");
				else
					printf("%6llu", result);
			} else {
				printf(_("Monitor %s, Counter %s has no count "
					 "function. Implementation error\n"),
				       monitors[mon]->name, s.name);
				exit(EXIT_FAILURE);
			}
		}
	}
	/*
	 * The monitor could still provide useful data, for example
	 * AMD HW counters partly sit in PCI config space.
	 * It's up to the monitor plug-in to check .is_online, this one
	 * is just for additional info.
	 */
	if (!cpu_top.core_info[cpu].is_online) {
		printf(_(" *is offline\n"));
		return;
	} else
		printf("\n");
}


/* param: string passed by -m param (The list of monitors to show)
 *
 * Monitors must have been registered already, matching monitors
 * are picked out and available monitors array is overridden
 * with matching ones
 *
 * Monitors get sorted in the same order the user passes them
*/

static void parse_monitor_param(char *param)
{
	unsigned int num;
	int mon, hits = 0;
	char *tmp = param, *token;
	struct cpuidle_monitor *tmp_mons[MONITORS_MAX];


	for (mon = 0; mon < MONITORS_MAX; mon++, tmp = NULL) {
		token = strtok(tmp, ",");
		if (token == NULL)
			break;
		if (strlen(token) >= MONITOR_NAME_LEN) {
			printf(_("%s: max monitor name length"
				 " (%d) exceeded\n"), token, MONITOR_NAME_LEN);
			continue;
		}

		for (num = 0; num < avail_monitors; num++) {
			if (!strcmp(monitors[num]->name, token)) {
				dprint("Found requested monitor: %s\n", token);
				tmp_mons[hits] = monitors[num];
				hits++;
			}
		}
	}
	if (hits == 0) {
		printf(_("No matching monitor found in %s, "
			 "try -l option\n"), param);
		monitor_help();
		exit(EXIT_FAILURE);
	}
	/* Override detected/registerd monitors array with requested one */
	memcpy(monitors, tmp_mons,
		sizeof(struct cpuidle_monitor *) * MONITORS_MAX);
	avail_monitors = hits;
}

void list_monitors(void)
{
	unsigned int mon;
	int state;
	cstate_t s;

	for (mon = 0; mon < avail_monitors; mon++) {
		printf(_("Monitor \"%s\" (%d states) - Might overflow after %u "
			 "s\n"),
			monitors[mon]->name, monitors[mon]->hw_states_num,
			monitors[mon]->overflow_s);

		for (state = 0; state < monitors[mon]->hw_states_num; state++) {
			s = monitors[mon]->hw_states[state];
			/*
			 * ToDo show more state capabilities:
			 * percent, time (granlarity)
			 */
			printf("%s\t[%c] -> %s\n", s.name, range_abbr[s.range],
			       gettext(s.desc));
		}
	}
}

int fork_it(char **argv)
{
	int status;
	unsigned int num;
	unsigned long long timediff;
	pid_t child_pid;
	struct timespec start, end;

	child_pid = fork();
	clock_gettime(CLOCK_REALTIME, &start);

	for (num = 0; num < avail_monitors; num++)
		monitors[num]->start();

	if (!child_pid) {
		/* child */
		execvp(argv[0], argv);
	} else {
		/* parent */
		if (child_pid == -1) {
			perror("fork");
			exit(1);
		}

		signal(SIGINT, SIG_IGN);
		signal(SIGQUIT, SIG_IGN);
		if (waitpid(child_pid, &status, 0) == -1) {
			perror("wait");
			exit(1);
		}
	}
	clock_gettime(CLOCK_REALTIME, &end);
	for (num = 0; num < avail_monitors; num++)
		monitors[num]->stop();

	timediff = timespec_diff_us(start, end);
	if (WIFEXITED(status))
		printf(_("%s took %.5f seconds and exited with status %d\n"),
			argv[0], timediff / (1000.0 * 1000),
			WEXITSTATUS(status));
	return 0;
}

int do_interval_measure(int i)
{
	unsigned int num;

	for (num = 0; num < avail_monitors; num++) {
		dprint("HW C-state residency monitor: %s - States: %d\n",
		       monitors[num]->name, monitors[num]->hw_states_num);
		monitors[num]->start();
	}
	sleep(i);
	for (num = 0; num < avail_monitors; num++)
		monitors[num]->stop();

	return 0;
}

static void cmdline(int argc, char *argv[])
{
	int opt;
	progname = basename(argv[0]);

	while ((opt = getopt(argc, argv, "+hli:m:")) != -1) {
		switch (opt) {
		case 'h':
			monitor_help();
			exit(EXIT_SUCCESS);
		case 'l':
			if (mode) {
				monitor_help();
				exit(EXIT_FAILURE);
			}
			mode = list;
			break;
		case 'i':
			/* only allow -i with -m or no option */
			if (mode && mode != show) {
				monitor_help();
				exit(EXIT_FAILURE);
			}
			interval = atoi(optarg);
			break;
		case 'm':
			if (mode) {
				monitor_help();
				exit(EXIT_FAILURE);
			}
			mode = show;
			show_monitors_param = optarg;
			break;
		default:
			monitor_help();
			exit(EXIT_FAILURE);
		}
	}
	if (!mode)
		mode = show_all;
}

int cmd_monitor(int argc, char **argv)
{
	unsigned int num;
	struct cpuidle_monitor *test_mon;
	int cpu;

	cmdline(argc, argv);
	cpu_count = get_cpu_topology(&cpu_top);
	if (cpu_count < 0) {
		printf(_("Cannot read number of available processors\n"));
		return EXIT_FAILURE;
	}

	dprint("System has up to %d CPU cores\n", cpu_count);

	for (num = 0; all_monitors[num]; num++) {
		dprint("Try to register: %s\n", all_monitors[num]->name);
		test_mon = all_monitors[num]->do_register();
		if (test_mon) {
			if (test_mon->needs_root && !run_as_root) {
				fprintf(stderr, _("Available monitor %s needs "
					  "root access\n"), test_mon->name);
				continue;
			}
			monitors[avail_monitors] = test_mon;
			dprint("%s registered\n", all_monitors[num]->name);
			avail_monitors++;
		}
	}

	if (avail_monitors == 0) {
		printf(_("No HW Cstate monitors found\n"));
		return 1;
	}

	if (mode == list) {
		list_monitors();
		exit(EXIT_SUCCESS);
	}

	if (mode == show)
		parse_monitor_param(show_monitors_param);

	dprint("Packages: %d - Cores: %d - CPUs: %d\n",
	       cpu_top.pkgs, cpu_top.cores, cpu_count);

	/*
	 * if any params left, it must be a command to fork
	 */
	if (argc - optind)
		fork_it(argv + optind);
	else
		do_interval_measure(interval);

	/* ToDo: Topology parsing needs fixing first to do
	   this more generically */
	if (cpu_top.pkgs > 1)
		print_header(3);
	else
		print_header(1);

	for (cpu = 0; cpu < cpu_count; cpu++) {
		if (cpu_top.pkgs > 1)
			print_results(3, cpu);
		else
			print_results(1, cpu);
	}

	for (num = 0; num < avail_monitors; num++)
		monitors[num]->unregister();

	cpu_topology_release(cpu_top);
	return 0;
}