blob: ce85f4191e0f605dfd67e1f00f072956201a4b92
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * A mini 'powertop' utility: |
4 | * Analyze power consumption on Intel-based laptops. |
5 | * Based on powertop 1.11. |
6 | * |
7 | * Copyright (C) 2010 Marek Polacek <mmpolacek@gmail.com> |
8 | * |
9 | * Licensed under GPLv2, see file LICENSE in this source tree. |
10 | */ |
11 | |
12 | //applet:IF_POWERTOP(APPLET(powertop, BB_DIR_USR_SBIN, BB_SUID_DROP)) |
13 | |
14 | //kbuild:lib-$(CONFIG_POWERTOP) += powertop.o |
15 | |
16 | //config:config POWERTOP |
17 | //config: bool "powertop" |
18 | //config: default y |
19 | //config: help |
20 | //config: Analyze power consumption on Intel-based laptops |
21 | |
22 | // XXX This should be configurable |
23 | #define ENABLE_FEATURE_POWERTOP_PROCIRQ 1 |
24 | |
25 | #include "libbb.h" |
26 | |
27 | |
28 | //#define debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__) |
29 | #define debug(fmt, ...) ((void)0) |
30 | |
31 | |
32 | #define BLOATY_HPET_IRQ_NUM_DETECTION 0 |
33 | #define MAX_CSTATE_COUNT 8 |
34 | #define IRQCOUNT 40 |
35 | |
36 | |
37 | #define DEFAULT_SLEEP 10 |
38 | #define DEFAULT_SLEEP_STR "10" |
39 | |
40 | /* Frequency of the ACPI timer */ |
41 | #define FREQ_ACPI 3579.545 |
42 | #define FREQ_ACPI_1000 3579545 |
43 | |
44 | /* Max filename length of entry in /sys/devices subsystem */ |
45 | #define BIG_SYSNAME_LEN 16 |
46 | |
47 | typedef unsigned long long ullong; |
48 | |
49 | struct line { |
50 | char *string; |
51 | int count; |
52 | /*int disk_count;*/ |
53 | }; |
54 | |
55 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ |
56 | struct irqdata { |
57 | smallint active; |
58 | int number; |
59 | ullong count; |
60 | char irq_desc[32]; |
61 | }; |
62 | #endif |
63 | |
64 | struct globals { |
65 | struct line *lines; /* the most often used member */ |
66 | int lines_cnt; |
67 | int lines_cumulative_count; |
68 | int maxcstate; |
69 | unsigned total_cpus; |
70 | smallint cant_enable_timer_stats; |
71 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ |
72 | # if BLOATY_HPET_IRQ_NUM_DETECTION |
73 | smallint scanned_timer_list; |
74 | int percpu_hpet_start; |
75 | int percpu_hpet_end; |
76 | # endif |
77 | int interrupt_0; |
78 | int total_interrupt; |
79 | struct irqdata interrupts[IRQCOUNT]; |
80 | #endif |
81 | ullong start_usage[MAX_CSTATE_COUNT]; |
82 | ullong last_usage[MAX_CSTATE_COUNT]; |
83 | ullong start_duration[MAX_CSTATE_COUNT]; |
84 | ullong last_duration[MAX_CSTATE_COUNT]; |
85 | #if ENABLE_FEATURE_USE_TERMIOS |
86 | struct termios init_settings; |
87 | #endif |
88 | }; |
89 | #define G (*ptr_to_globals) |
90 | #define INIT_G() do { \ |
91 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \ |
92 | } while (0) |
93 | |
94 | #if ENABLE_FEATURE_USE_TERMIOS |
95 | static void reset_term(void) |
96 | { |
97 | tcsetattr_stdin_TCSANOW(&G.init_settings); |
98 | } |
99 | |
100 | static void sig_handler(int signo UNUSED_PARAM) |
101 | { |
102 | reset_term(); |
103 | _exit(EXIT_FAILURE); |
104 | } |
105 | #endif |
106 | |
107 | static int write_str_to_file(const char *fname, const char *str) |
108 | { |
109 | FILE *fp = fopen_for_write(fname); |
110 | if (!fp) |
111 | return 1; |
112 | fputs(str, fp); |
113 | fclose(fp); |
114 | return 0; |
115 | } |
116 | |
117 | /* Make it more readable */ |
118 | #define start_timer() write_str_to_file("/proc/timer_stats", "1\n") |
119 | #define stop_timer() write_str_to_file("/proc/timer_stats", "0\n") |
120 | |
121 | static NOINLINE void clear_lines(void) |
122 | { |
123 | int i; |
124 | if (G.lines) { |
125 | for (i = 0; i < G.lines_cnt; i++) |
126 | free(G.lines[i].string); |
127 | free(G.lines); |
128 | G.lines_cnt = 0; |
129 | G.lines = NULL; |
130 | } |
131 | } |
132 | |
133 | static void update_lines_cumulative_count(void) |
134 | { |
135 | int i; |
136 | for (i = 0; i < G.lines_cnt; i++) |
137 | G.lines_cumulative_count += G.lines[i].count; |
138 | } |
139 | |
140 | static int line_compare(const void *p1, const void *p2) |
141 | { |
142 | const struct line *a = p1; |
143 | const struct line *b = p2; |
144 | return (b->count /*+ 50 * b->disk_count*/) - (a->count /*+ 50 * a->disk_count*/); |
145 | } |
146 | |
147 | static void sort_lines(void) |
148 | { |
149 | qsort(G.lines, G.lines_cnt, sizeof(G.lines[0]), line_compare); |
150 | } |
151 | |
152 | /* Save C-state usage and duration. Also update maxcstate. */ |
153 | static void read_cstate_counts(ullong *usage, ullong *duration) |
154 | { |
155 | DIR *dir; |
156 | struct dirent *d; |
157 | |
158 | dir = opendir("/proc/acpi/processor"); |
159 | if (!dir) |
160 | return; |
161 | |
162 | while ((d = readdir(dir)) != NULL) { |
163 | FILE *fp; |
164 | char buf[192]; |
165 | int level; |
166 | int len; |
167 | |
168 | len = strlen(d->d_name); /* "CPUnn" */ |
169 | if (len < 3 || len > BIG_SYSNAME_LEN) |
170 | continue; |
171 | |
172 | sprintf(buf, "%s/%s/power", "/proc/acpi/processor", d->d_name); |
173 | fp = fopen_for_read(buf); |
174 | if (!fp) |
175 | continue; |
176 | |
177 | // Example file contents: |
178 | // active state: C0 |
179 | // max_cstate: C8 |
180 | // maximum allowed latency: 2000000000 usec |
181 | // states: |
182 | // C1: type[C1] promotion[--] demotion[--] latency[001] usage[00006173] duration[00000000000000000000] |
183 | // C2: type[C2] promotion[--] demotion[--] latency[001] usage[00085191] duration[00000000000083024907] |
184 | // C3: type[C3] promotion[--] demotion[--] latency[017] usage[01017622] duration[00000000017921327182] |
185 | level = 0; |
186 | while (fgets(buf, sizeof(buf), fp)) { |
187 | char *p = strstr(buf, "age["); |
188 | if (!p) |
189 | continue; |
190 | p += 4; |
191 | usage[level] += bb_strtoull(p, NULL, 10) + 1; |
192 | p = strstr(buf, "ation["); |
193 | if (!p) |
194 | continue; |
195 | p += 6; |
196 | duration[level] += bb_strtoull(p, NULL, 10); |
197 | |
198 | if (level >= MAX_CSTATE_COUNT-1) |
199 | break; |
200 | level++; |
201 | if (level > G.maxcstate) /* update maxcstate */ |
202 | G.maxcstate = level; |
203 | } |
204 | fclose(fp); |
205 | } |
206 | closedir(dir); |
207 | } |
208 | |
209 | /* Add line and/or update count */ |
210 | static void save_line(const char *string, int count) |
211 | { |
212 | int i; |
213 | for (i = 0; i < G.lines_cnt; i++) { |
214 | if (strcmp(string, G.lines[i].string) == 0) { |
215 | /* It's already there, only update count */ |
216 | G.lines[i].count += count; |
217 | return; |
218 | } |
219 | } |
220 | |
221 | /* Add new line */ |
222 | G.lines = xrealloc_vector(G.lines, 4, G.lines_cnt); |
223 | G.lines[G.lines_cnt].string = xstrdup(string); |
224 | G.lines[G.lines_cnt].count = count; |
225 | /*G.lines[G.lines_cnt].disk_count = 0;*/ |
226 | G.lines_cnt++; |
227 | } |
228 | |
229 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ |
230 | static int is_hpet_irq(const char *name) |
231 | { |
232 | char *p; |
233 | # if BLOATY_HPET_IRQ_NUM_DETECTION |
234 | long hpet_chan; |
235 | |
236 | /* Learn the range of existing hpet timers. This is done once */ |
237 | if (!G.scanned_timer_list) { |
238 | FILE *fp; |
239 | char buf[80]; |
240 | |
241 | G.scanned_timer_list = true; |
242 | fp = fopen_for_read("/proc/timer_list"); |
243 | if (!fp) |
244 | return 0; |
245 | |
246 | while (fgets(buf, sizeof(buf), fp)) { |
247 | p = strstr(buf, "Clock Event Device: hpet"); |
248 | if (!p) |
249 | continue; |
250 | p += sizeof("Clock Event Device: hpet")-1; |
251 | if (!isdigit(*p)) |
252 | continue; |
253 | hpet_chan = xatoi_positive(p); |
254 | if (hpet_chan < G.percpu_hpet_start) |
255 | G.percpu_hpet_start = hpet_chan; |
256 | if (hpet_chan > G.percpu_hpet_end) |
257 | G.percpu_hpet_end = hpet_chan; |
258 | } |
259 | fclose(fp); |
260 | } |
261 | # endif |
262 | //TODO: optimize |
263 | p = strstr(name, "hpet"); |
264 | if (!p) |
265 | return 0; |
266 | p += 4; |
267 | if (!isdigit(*p)) |
268 | return 0; |
269 | # if BLOATY_HPET_IRQ_NUM_DETECTION |
270 | hpet_chan = xatoi_positive(p); |
271 | if (hpet_chan < G.percpu_hpet_start || hpet_chan > G.percpu_hpet_end) |
272 | return 0; |
273 | # endif |
274 | return 1; |
275 | } |
276 | |
277 | /* Save new IRQ count, return delta from old one */ |
278 | static int save_irq_count(int irq, ullong count) |
279 | { |
280 | int unused = IRQCOUNT; |
281 | int i; |
282 | for (i = 0; i < IRQCOUNT; i++) { |
283 | if (G.interrupts[i].active && G.interrupts[i].number == irq) { |
284 | ullong old = G.interrupts[i].count; |
285 | G.interrupts[i].count = count; |
286 | return count - old; |
287 | } |
288 | if (!G.interrupts[i].active && unused > i) |
289 | unused = i; |
290 | } |
291 | if (unused < IRQCOUNT) { |
292 | G.interrupts[unused].active = 1; |
293 | G.interrupts[unused].count = count; |
294 | G.interrupts[unused].number = irq; |
295 | } |
296 | return count; |
297 | } |
298 | |
299 | /* Read /proc/interrupts, save IRQ counts and IRQ description */ |
300 | static void process_irq_counts(void) |
301 | { |
302 | FILE *fp; |
303 | char buf[128]; |
304 | |
305 | /* Reset values */ |
306 | G.interrupt_0 = 0; |
307 | G.total_interrupt = 0; |
308 | |
309 | fp = xfopen_for_read("/proc/interrupts"); |
310 | while (fgets(buf, sizeof(buf), fp)) { |
311 | char irq_desc[sizeof(" <kernel IPI> : ") + sizeof(buf)]; |
312 | char *p; |
313 | const char *name; |
314 | int nr; |
315 | ullong count; |
316 | ullong delta; |
317 | |
318 | p = strchr(buf, ':'); |
319 | if (!p) |
320 | continue; |
321 | /* 0: 143646045 153901007 IO-APIC-edge timer |
322 | * ^ |
323 | */ |
324 | *p = '\0'; |
325 | /* Deal with non-maskable interrupts -- make up fake numbers */ |
326 | nr = index_in_strings("NMI\0RES\0CAL\0TLB\0TRM\0THR\0SPU\0", buf); |
327 | if (nr >= 0) { |
328 | nr += 20000; |
329 | } else { |
330 | /* bb_strtou doesn't eat leading spaces, using strtoul */ |
331 | errno = 0; |
332 | nr = strtoul(buf, NULL, 10); |
333 | if (errno) |
334 | continue; |
335 | } |
336 | p++; |
337 | /* 0: 143646045 153901007 IO-APIC-edge timer |
338 | * ^ |
339 | */ |
340 | /* Sum counts for this IRQ */ |
341 | count = 0; |
342 | while (1) { |
343 | char *tmp; |
344 | p = skip_whitespace(p); |
345 | if (!isdigit(*p)) |
346 | break; |
347 | count += bb_strtoull(p, &tmp, 10); |
348 | p = tmp; |
349 | } |
350 | /* 0: 143646045 153901007 IO-APIC-edge timer |
351 | * NMI: 1 2 Non-maskable interrupts |
352 | * ^ |
353 | */ |
354 | if (nr < 20000) { |
355 | /* Skip to the interrupt name, e.g. 'timer' */ |
356 | p = strchr(p, ' '); |
357 | if (!p) |
358 | continue; |
359 | p = skip_whitespace(p); |
360 | } |
361 | |
362 | name = p; |
363 | chomp(p); |
364 | /* Save description of the interrupt */ |
365 | if (nr >= 20000) |
366 | sprintf(irq_desc, " <kernel IPI> : %s", name); |
367 | else |
368 | sprintf(irq_desc, " <interrupt> : %s", name); |
369 | |
370 | delta = save_irq_count(nr, count); |
371 | |
372 | /* Skip per CPU timer interrupts */ |
373 | if (is_hpet_irq(name)) |
374 | continue; |
375 | |
376 | if (nr != 0 && delta != 0) |
377 | save_line(irq_desc, delta); |
378 | |
379 | if (nr == 0) |
380 | G.interrupt_0 = delta; |
381 | else |
382 | G.total_interrupt += delta; |
383 | } |
384 | |
385 | fclose(fp); |
386 | } |
387 | #else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */ |
388 | # define process_irq_counts() ((void)0) |
389 | #endif |
390 | |
391 | static NOINLINE int process_timer_stats(void) |
392 | { |
393 | char buf[128]; |
394 | char line[15 + 3 + 128]; |
395 | int n; |
396 | FILE *fp; |
397 | |
398 | buf[0] = '\0'; |
399 | |
400 | n = 0; |
401 | fp = NULL; |
402 | if (!G.cant_enable_timer_stats) |
403 | fp = fopen_for_read("/proc/timer_stats"); |
404 | if (fp) { |
405 | // Example file contents: |
406 | // Timer Stats Version: v0.2 |
407 | // Sample period: 1.329 s |
408 | // 76, 0 swapper hrtimer_start_range_ns (tick_sched_timer) |
409 | // 88, 0 swapper hrtimer_start_range_ns (tick_sched_timer) |
410 | // 24, 3787 firefox hrtimer_start_range_ns (hrtimer_wakeup) |
411 | // 46D, 1136 kondemand/1 do_dbs_timer (delayed_work_timer_fn) |
412 | // ... |
413 | // 1, 1656 Xorg hrtimer_start_range_ns (hrtimer_wakeup) |
414 | // 1, 2159 udisks-daemon hrtimer_start_range_ns (hrtimer_wakeup) |
415 | // 331 total events, 249.059 events/sec |
416 | while (fgets(buf, sizeof(buf), fp)) { |
417 | const char *count, *process, *func; |
418 | char *p; |
419 | int idx; |
420 | unsigned cnt; |
421 | |
422 | count = skip_whitespace(buf); |
423 | p = strchr(count, ','); |
424 | if (!p) |
425 | continue; |
426 | *p++ = '\0'; |
427 | cnt = bb_strtou(count, NULL, 10); |
428 | if (strcmp(skip_non_whitespace(count), " total events") == 0) { |
429 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ |
430 | n = cnt / G.total_cpus; |
431 | if (n > 0 && n < G.interrupt_0) { |
432 | sprintf(line, " <interrupt> : %s", "extra timer interrupt"); |
433 | save_line(line, G.interrupt_0 - n); |
434 | } |
435 | #endif |
436 | break; |
437 | } |
438 | if (strchr(count, 'D')) |
439 | continue; /* deferred */ |
440 | p = skip_whitespace(p); /* points to pid now */ |
441 | process = NULL; |
442 | get_func_name: |
443 | p = strchr(p, ' '); |
444 | if (!p) |
445 | continue; |
446 | *p++ = '\0'; |
447 | p = skip_whitespace(p); |
448 | if (process == NULL) { |
449 | process = p; |
450 | goto get_func_name; |
451 | } |
452 | func = p; |
453 | |
454 | //if (strcmp(process, "swapper") == 0 |
455 | // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0 |
456 | //) { |
457 | // process = "[kernel scheduler]"; |
458 | // func = "Load balancing tick"; |
459 | //} |
460 | |
461 | if (is_prefixed_with(func, "tick_nohz_")) |
462 | continue; |
463 | if (is_prefixed_with(func, "tick_setup_sched_timer")) |
464 | continue; |
465 | //if (strcmp(process, "powertop") == 0) |
466 | // continue; |
467 | |
468 | idx = index_in_strings("insmod\0modprobe\0swapper\0", process); |
469 | if (idx != -1) { |
470 | process = idx < 2 ? "[kernel module]" : "<kernel core>"; |
471 | } |
472 | |
473 | chomp(p); |
474 | |
475 | // 46D\01136\0kondemand/1\0do_dbs_timer (delayed_work_timer_fn) |
476 | // ^ ^ ^ |
477 | // count process func |
478 | |
479 | //if (strchr(process, '[')) |
480 | sprintf(line, "%15.15s : %s", process, func); |
481 | //else |
482 | // sprintf(line, "%s", process); |
483 | save_line(line, cnt); |
484 | } |
485 | fclose(fp); |
486 | } |
487 | |
488 | return n; |
489 | } |
490 | |
491 | #ifdef __i386__ |
492 | /* |
493 | * Get information about CPU using CPUID opcode. |
494 | */ |
495 | static void cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx, |
496 | unsigned int *edx) |
497 | { |
498 | /* EAX value specifies what information to return */ |
499 | __asm__( |
500 | " pushl %%ebx\n" /* Save EBX */ |
501 | " cpuid\n" |
502 | " movl %%ebx, %1\n" /* Save content of EBX */ |
503 | " popl %%ebx\n" /* Restore EBX */ |
504 | : "=a"(*eax), /* Output */ |
505 | "=r"(*ebx), |
506 | "=c"(*ecx), |
507 | "=d"(*edx) |
508 | : "0"(*eax), /* Input */ |
509 | "1"(*ebx), |
510 | "2"(*ecx), |
511 | "3"(*edx) |
512 | /* No clobbered registers */ |
513 | ); |
514 | } |
515 | #endif |
516 | |
517 | #ifdef __i386__ |
518 | static NOINLINE void print_intel_cstates(void) |
519 | { |
520 | int bios_table[8] = { 0 }; |
521 | int nbios = 0; |
522 | DIR *cpudir; |
523 | struct dirent *d; |
524 | int i; |
525 | unsigned eax, ebx, ecx, edx; |
526 | |
527 | cpudir = opendir("/sys/devices/system/cpu"); |
528 | if (!cpudir) |
529 | return; |
530 | |
531 | /* Loop over cpuN entries */ |
532 | while ((d = readdir(cpudir)) != NULL) { |
533 | DIR *dir; |
534 | int len; |
535 | char fname[sizeof("/sys/devices/system/cpu//cpuidle//desc") + 2*BIG_SYSNAME_LEN]; |
536 | |
537 | len = strlen(d->d_name); |
538 | if (len < 3 || len > BIG_SYSNAME_LEN) |
539 | continue; |
540 | |
541 | if (!isdigit(d->d_name[3])) |
542 | continue; |
543 | |
544 | len = sprintf(fname, "%s/%s/cpuidle", "/sys/devices/system/cpu", d->d_name); |
545 | dir = opendir(fname); |
546 | if (!dir) |
547 | continue; |
548 | |
549 | /* |
550 | * Every C-state has its own stateN directory, that |
551 | * contains a 'time' and a 'usage' file. |
552 | */ |
553 | while ((d = readdir(dir)) != NULL) { |
554 | FILE *fp; |
555 | char buf[64]; |
556 | int n; |
557 | |
558 | n = strlen(d->d_name); |
559 | if (n < 3 || n > BIG_SYSNAME_LEN) |
560 | continue; |
561 | |
562 | sprintf(fname + len, "/%s/desc", d->d_name); |
563 | fp = fopen_for_read(fname); |
564 | if (fp) { |
565 | char *p = fgets(buf, sizeof(buf), fp); |
566 | fclose(fp); |
567 | if (!p) |
568 | break; |
569 | p = strstr(p, "MWAIT "); |
570 | if (p) { |
571 | int pos; |
572 | p += sizeof("MWAIT ") - 1; |
573 | pos = (bb_strtoull(p, NULL, 16) >> 4) + 1; |
574 | if (pos >= ARRAY_SIZE(bios_table)) |
575 | continue; |
576 | bios_table[pos]++; |
577 | nbios++; |
578 | } |
579 | } |
580 | } |
581 | closedir(dir); |
582 | } |
583 | closedir(cpudir); |
584 | |
585 | if (!nbios) |
586 | return; |
587 | |
588 | eax = 5; |
589 | ebx = ecx = edx = 0; |
590 | cpuid(&eax, &ebx, &ecx, &edx); |
591 | if (!edx || !(ecx & 1)) |
592 | return; |
593 | |
594 | printf("Your %s the following C-states: ", "CPU supports"); |
595 | i = 0; |
596 | while (edx) { |
597 | if (edx & 7) |
598 | printf("C%u ", i); |
599 | edx >>= 4; |
600 | i++; |
601 | } |
602 | bb_putchar('\n'); |
603 | |
604 | /* Print BIOS C-States */ |
605 | printf("Your %s the following C-states: ", "BIOS reports"); |
606 | for (i = 0; i < ARRAY_SIZE(bios_table); i++) |
607 | if (bios_table[i]) |
608 | printf("C%u ", i); |
609 | |
610 | bb_putchar('\n'); |
611 | } |
612 | #else |
613 | # define print_intel_cstates() ((void)0) |
614 | #endif |
615 | |
616 | static void show_timerstats(void) |
617 | { |
618 | unsigned lines; |
619 | |
620 | /* Get terminal height */ |
621 | get_terminal_width_height(STDOUT_FILENO, NULL, &lines); |
622 | |
623 | /* We don't have whole terminal just for timerstats */ |
624 | lines -= 12; |
625 | |
626 | if (!G.cant_enable_timer_stats) { |
627 | int i, n = 0; |
628 | char strbuf6[6]; |
629 | |
630 | puts("\nTop causes for wakeups:"); |
631 | for (i = 0; i < G.lines_cnt; i++) { |
632 | if ((G.lines[i].count > 0 /*|| G.lines[i].disk_count > 0*/) |
633 | && n++ < lines |
634 | ) { |
635 | /* NB: upstream powertop prints "(wakeups/sec)", |
636 | * we print just "(wakeup counts)". |
637 | */ |
638 | /*char c = ' '; |
639 | if (G.lines[i].disk_count) |
640 | c = 'D';*/ |
641 | smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY")[0] = '\0'; |
642 | printf(/*" %5.1f%% (%s)%c %s\n"*/ |
643 | " %5.1f%% (%s) %s\n", |
644 | G.lines[i].count * 100.0 / G.lines_cumulative_count, |
645 | strbuf6, /*c,*/ |
646 | G.lines[i].string); |
647 | } |
648 | } |
649 | } else { |
650 | bb_putchar('\n'); |
651 | bb_error_msg("no stats available; run as root or" |
652 | " enable the timer_stats module"); |
653 | } |
654 | } |
655 | |
656 | // Example display from powertop version 1.11 |
657 | // Cn Avg residency P-states (frequencies) |
658 | // C0 (cpu running) ( 0.5%) 2.00 Ghz 0.0% |
659 | // polling 0.0ms ( 0.0%) 1.67 Ghz 0.0% |
660 | // C1 mwait 0.0ms ( 0.0%) 1333 Mhz 0.1% |
661 | // C2 mwait 0.1ms ( 0.1%) 1000 Mhz 99.9% |
662 | // C3 mwait 12.1ms (99.4%) |
663 | // |
664 | // Wakeups-from-idle per second : 93.6 interval: 15.0s |
665 | // no ACPI power usage estimate available |
666 | // |
667 | // Top causes for wakeups: |
668 | // 32.4% ( 26.7) <interrupt> : extra timer interrupt |
669 | // 29.0% ( 23.9) <kernel core> : hrtimer_start_range_ns (tick_sched_timer) |
670 | // 9.0% ( 7.5) <kernel core> : hrtimer_start (tick_sched_timer) |
671 | // 6.5% ( 5.3) <interrupt> : ata_piix |
672 | // 5.0% ( 4.1) inetd : hrtimer_start_range_ns (hrtimer_wakeup) |
673 | |
674 | //usage:#define powertop_trivial_usage |
675 | //usage: "" |
676 | //usage:#define powertop_full_usage "\n\n" |
677 | //usage: "Analyze power consumption on Intel-based laptops" |
678 | |
679 | int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
680 | int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv) |
681 | { |
682 | ullong cur_usage[MAX_CSTATE_COUNT]; |
683 | ullong cur_duration[MAX_CSTATE_COUNT]; |
684 | char cstate_lines[MAX_CSTATE_COUNT + 2][64]; |
685 | #if ENABLE_FEATURE_USE_TERMIOS |
686 | struct termios new_settings; |
687 | struct pollfd pfd[1]; |
688 | |
689 | pfd[0].fd = 0; |
690 | pfd[0].events = POLLIN; |
691 | #endif |
692 | |
693 | INIT_G(); |
694 | |
695 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ && BLOATY_HPET_IRQ_NUM_DETECTION |
696 | G.percpu_hpet_start = INT_MAX; |
697 | G.percpu_hpet_end = INT_MIN; |
698 | #endif |
699 | |
700 | /* Print warning when we don't have superuser privileges */ |
701 | if (geteuid() != 0) |
702 | bb_error_msg("run as root to collect enough information"); |
703 | |
704 | /* Get number of CPUs */ |
705 | G.total_cpus = get_cpu_count(); |
706 | |
707 | puts("Collecting data for "DEFAULT_SLEEP_STR" seconds"); |
708 | |
709 | #if ENABLE_FEATURE_USE_TERMIOS |
710 | tcgetattr(0, (void *)&G.init_settings); |
711 | memcpy(&new_settings, &G.init_settings, sizeof(new_settings)); |
712 | /* Turn on unbuffered input, turn off echoing */ |
713 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL); |
714 | /* So we don't forget to reset term settings */ |
715 | atexit(reset_term); |
716 | bb_signals(BB_FATAL_SIGS, sig_handler); |
717 | tcsetattr_stdin_TCSANOW(&new_settings); |
718 | #endif |
719 | |
720 | /* Collect initial data */ |
721 | process_irq_counts(); |
722 | |
723 | /* Read initial usage and duration */ |
724 | read_cstate_counts(G.start_usage, G.start_duration); |
725 | |
726 | /* Copy them to "last" */ |
727 | memcpy(G.last_usage, G.start_usage, sizeof(G.last_usage)); |
728 | memcpy(G.last_duration, G.start_duration, sizeof(G.last_duration)); |
729 | |
730 | /* Display C-states */ |
731 | print_intel_cstates(); |
732 | |
733 | G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */ |
734 | |
735 | /* The main loop */ |
736 | for (;;) { |
737 | //double maxsleep = 0.0; |
738 | ullong totalticks, totalevents; |
739 | int i; |
740 | |
741 | G.cant_enable_timer_stats |= start_timer(); /* 1 on error */ |
742 | #if !ENABLE_FEATURE_USE_TERMIOS |
743 | sleep(DEFAULT_SLEEP); |
744 | #else |
745 | if (safe_poll(pfd, 1, DEFAULT_SLEEP * 1000) > 0) { |
746 | unsigned char c; |
747 | if (safe_read(STDIN_FILENO, &c, 1) != 1) |
748 | break; /* EOF/error */ |
749 | if (c == G.init_settings.c_cc[VINTR]) |
750 | break; /* ^C */ |
751 | if ((c | 0x20) == 'q') |
752 | break; |
753 | } |
754 | #endif |
755 | G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */ |
756 | |
757 | clear_lines(); |
758 | process_irq_counts(); |
759 | |
760 | /* Clear the stats */ |
761 | memset(cur_duration, 0, sizeof(cur_duration)); |
762 | memset(cur_usage, 0, sizeof(cur_usage)); |
763 | |
764 | /* Read them */ |
765 | read_cstate_counts(cur_usage, cur_duration); |
766 | |
767 | /* Count totalticks and totalevents */ |
768 | totalticks = totalevents = 0; |
769 | for (i = 0; i < MAX_CSTATE_COUNT; i++) { |
770 | if (cur_usage[i] != 0) { |
771 | totalticks += cur_duration[i] - G.last_duration[i]; |
772 | totalevents += cur_usage[i] - G.last_usage[i]; |
773 | } |
774 | } |
775 | |
776 | /* Clear the screen */ |
777 | printf("\033[H\033[J"); |
778 | |
779 | /* Clear C-state lines */ |
780 | memset(&cstate_lines, 0, sizeof(cstate_lines)); |
781 | |
782 | if (totalevents == 0 && G.maxcstate <= 1) { |
783 | /* This should not happen */ |
784 | strcpy(cstate_lines[0], "C-state information is not available\n"); |
785 | } else { |
786 | double percentage; |
787 | unsigned newticks; |
788 | |
789 | newticks = G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000 - totalticks; |
790 | /* Handle rounding errors: do not display negative values */ |
791 | if ((int)newticks < 0) |
792 | newticks = 0; |
793 | |
794 | sprintf(cstate_lines[0], "Cn\t\t Avg residency\n"); |
795 | percentage = newticks * 100.0 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000); |
796 | sprintf(cstate_lines[1], "C0 (cpu running) (%4.1f%%)\n", percentage); |
797 | |
798 | /* Compute values for individual C-states */ |
799 | for (i = 0; i < MAX_CSTATE_COUNT; i++) { |
800 | if (cur_usage[i] != 0) { |
801 | double slept; |
802 | slept = (cur_duration[i] - G.last_duration[i]) |
803 | / (cur_usage[i] - G.last_usage[i] + 0.1) / FREQ_ACPI; |
804 | percentage = (cur_duration[i] - G.last_duration[i]) * 100 |
805 | / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000); |
806 | sprintf(cstate_lines[i + 2], "C%u\t\t%5.1fms (%4.1f%%)\n", |
807 | i + 1, slept, percentage); |
808 | //if (maxsleep < slept) |
809 | // maxsleep = slept; |
810 | } |
811 | } |
812 | } |
813 | |
814 | for (i = 0; i < MAX_CSTATE_COUNT + 2; i++) |
815 | if (cstate_lines[i][0]) |
816 | fputs(cstate_lines[i], stdout); |
817 | |
818 | i = process_timer_stats(); |
819 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ |
820 | if (totalevents == 0) { |
821 | /* No C-state info available, use timerstats */ |
822 | totalevents = i * G.total_cpus + G.total_interrupt; |
823 | if (i < 0) |
824 | totalevents += G.interrupt_0 - i; |
825 | } |
826 | #endif |
827 | /* Upstream powertop prints wakeups per sec per CPU, |
828 | * we print just raw wakeup counts. |
829 | */ |
830 | //TODO: show real seconds (think about manual refresh) |
831 | printf("\nWakeups-from-idle in %u seconds: %llu\n", |
832 | DEFAULT_SLEEP, |
833 | totalevents |
834 | ); |
835 | |
836 | update_lines_cumulative_count(); |
837 | sort_lines(); |
838 | show_timerstats(); |
839 | fflush(stdout); |
840 | |
841 | /* Clear the stats */ |
842 | memset(cur_duration, 0, sizeof(cur_duration)); |
843 | memset(cur_usage, 0, sizeof(cur_usage)); |
844 | |
845 | /* Get new values */ |
846 | read_cstate_counts(cur_usage, cur_duration); |
847 | |
848 | /* Save them */ |
849 | memcpy(G.last_usage, cur_usage, sizeof(G.last_usage)); |
850 | memcpy(G.last_duration, cur_duration, sizeof(G.last_duration)); |
851 | } /* for (;;) */ |
852 | |
853 | bb_putchar('\n'); |
854 | |
855 | return EXIT_SUCCESS; |
856 | } |
857 |