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-rw-r--r--procps/powertop.c880
-rw-r--r--procps/top.c3
2 files changed, 882 insertions, 1 deletions
diff --git a/procps/powertop.c b/procps/powertop.c
new file mode 100644
index 000000000..5e028f074
--- /dev/null
+++ b/procps/powertop.c
@@ -0,0 +1,880 @@
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_BIN, _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
47typedef unsigned long long ullong;
48
49struct line {
50 char *string;
51 int count;
52 /*int disk_count;*/
53};
54
55#if ENABLE_FEATURE_POWERTOP_PROCIRQ
56struct irqdata {
57 smallint active;
58 int number;
59 ullong count;
60 char irq_desc[32];
61};
62#endif
63
64struct 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
95static void reset_term(void)
96{
97 tcsetattr_stdin_TCSANOW(&G.init_settings);
98}
99
100static void sig_handler(int signo UNUSED_PARAM)
101{
102 reset_term();
103 _exit(EXIT_FAILURE);
104}
105#endif
106
107static 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
121static 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
133static 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
140static 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
147static 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. */
153static 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, "/proc/acpi/processor/%s/power", 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 */
210static 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
230static 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 */
278static 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 */
300static 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 /* Deal with non-maskable interrupts -- make up fake numbers */
325 nr = -1;
326 if (buf[0] != ' ' && !isdigit(buf[0])) {
327//TODO: optimize
328 if (strncmp(buf, "NMI:", 4) == 0)
329 nr = 20000;
330 if (strncmp(buf, "RES:", 4) == 0)
331 nr = 20001;
332 if (strncmp(buf, "CAL:", 4) == 0)
333 nr = 20002;
334 if (strncmp(buf, "TLB:", 4) == 0)
335 nr = 20003;
336 if (strncmp(buf, "TRM:", 4) == 0)
337 nr = 20004;
338 if (strncmp(buf, "THR:", 4) == 0)
339 nr = 20005;
340 if (strncmp(buf, "SPU:", 4) == 0)
341 nr = 20006;
342 } else {
343 /* bb_strtou doesn't eat leading spaces, using strtoul */
344 nr = strtoul(buf, NULL, 10);
345 }
346 if (nr == -1)
347 continue;
348
349 p++;
350 /* 0: 143646045 153901007 IO-APIC-edge timer
351 * ^
352 */
353 /* Sum counts for this IRQ */
354 count = 0;
355 while (1) {
356 char *tmp;
357 p = skip_whitespace(p);
358 if (!isdigit(*p))
359 break;
360 count += bb_strtoull(p, &tmp, 10);
361 p = tmp;
362 }
363 /* 0: 143646045 153901007 IO-APIC-edge timer
364 * NMI: 1 2 Non-maskable interrupts
365 * ^
366 */
367 if (nr < 20000) {
368 /* Skip to the interrupt name, e.g. 'timer' */
369 p = strchr(p, ' ');
370 if (!p)
371 continue;
372 p = skip_whitespace(p);
373 }
374
375 name = p;
376 strchrnul(name, '\n')[0] = '\0';
377 /* Save description of the interrupt */
378 if (nr >= 20000)
379 sprintf(irq_desc, " <kernel IPI> : %s", name);
380 else
381 sprintf(irq_desc, " <interrupt> : %s", name);
382
383 delta = save_irq_count(nr, count);
384
385 /* Skip per CPU timer interrupts */
386 if (is_hpet_irq(name))
387 continue;
388
389 if (nr != 0 && delta != 0)
390 save_line(irq_desc, delta);
391
392 if (nr == 0)
393 G.interrupt_0 = delta;
394 else
395 G.total_interrupt += delta;
396 }
397
398 fclose(fp);
399}
400#else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */
401# define process_irq_counts() ((void)0)
402#endif
403
404static NOINLINE int process_timer_stats(void)
405{
406 char buf[128];
407 char line[15 + 3 + 128];
408 int n;
409 ullong totalticks;
410 FILE *fp;
411
412 buf[0] = '\0';
413 totalticks = 0;
414
415 fp = NULL;
416 if (!G.cant_enable_timer_stats)
417 fp = fopen_for_read("/proc/timer_stats");
418 if (fp) {
419// Example file contents:
420// Timer Stats Version: v0.2
421// Sample period: 1.329 s
422// 76, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
423// 88, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
424// 24, 3787 firefox hrtimer_start_range_ns (hrtimer_wakeup)
425// 46D, 1136 kondemand/1 do_dbs_timer (delayed_work_timer_fn)
426// ...
427// 1, 1656 Xorg hrtimer_start_range_ns (hrtimer_wakeup)
428// 1, 2159 udisks-daemon hrtimer_start_range_ns (hrtimer_wakeup)
429// 331 total events, 249.059 events/sec
430 while (fgets(buf, sizeof(buf), fp)) {
431 const char *count, *process, *func;
432 char *p;
433 int cnt;
434
435 count = skip_whitespace(buf);
436 p = strchr(count, ',');
437 if (!p)
438 continue;
439 *p++ = '\0';
440 if (strcmp(strchrnul(count, ' '), " total events") == 0)
441 break;
442 p = skip_whitespace(p); /* points to pid */
443
444/* Find char ' ', then eat remaining spaces */
445#define ADVANCE(p) do { \
446 (p) = strchr((p), ' '); \
447 if (!(p)) \
448 continue; \
449 *(p) = '\0'; \
450 (p)++; \
451 (p) = skip_whitespace(p); \
452} while (0)
453 /* Get process name */
454 ADVANCE(p);
455 process = p;
456 /* Get function */
457 ADVANCE(p);
458 func = p;
459#undef ADVANCE
460 //if (strcmp(process, "swapper") == 0
461 // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0
462 //) {
463 // process = "[kernel scheduler]";
464 // func = "Load balancing tick";
465 //}
466
467 if (strncmp(func, "tick_nohz_", 10) == 0)
468 continue;
469 if (strncmp(func, "tick_setup_sched_timer", 20) == 0)
470 continue;
471 //if (strcmp(process, "powertop") == 0)
472 // continue;
473
474 if (strcmp(process, "insmod") == 0)
475 process = "[kernel module]";
476 if (strcmp(process, "modprobe") == 0)
477 process = "[kernel module]";
478 if (strcmp(process, "swapper") == 0)
479 process = "<kernel core>";
480
481 strchrnul(p, '\n')[0] = '\0';
482
483 {
484 char *tmp;
485 cnt = bb_strtoull(count, &tmp, 10);
486 p = tmp;
487 }
488 while (*p != '\0') {
489 if (*p++ == 'D') /* deferred */
490 goto skip;
491 }
492
493 //if (strchr(process, '['))
494 sprintf(line, "%15.15s : %s", process, func);
495 //else
496 // sprintf(line, "%s", process);
497 save_line(line, cnt);
498 skip: ;
499 }
500 fclose(fp);
501 }
502
503 n = 0;
504#if ENABLE_FEATURE_POWERTOP_PROCIRQ
505 if (strstr(buf, "total events")) {
506 n = bb_strtoull(buf, NULL, 10) / G.total_cpus;
507 if (n > 0 && n < G.interrupt_0) {
508 sprintf(line, " <interrupt> : %s", "extra timer interrupt");
509 save_line(line, G.interrupt_0 - n);
510 }
511 }
512#endif
513 return n;
514}
515
516#ifdef __i386__
517/*
518 * Get information about CPU using CPUID opcode.
519 */
520static void cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx,
521 unsigned int *edx)
522{
523 /* EAX value specifies what information to return */
524 __asm__(
525 " pushl %%ebx\n" /* Save EBX */
526 " cpuid\n"
527 " movl %%ebx, %1\n" /* Save content of EBX */
528 " popl %%ebx\n" /* Restore EBX */
529 : "=a"(*eax), /* Output */
530 "=r"(*ebx),
531 "=c"(*ecx),
532 "=d"(*edx)
533 : "0"(*eax), /* Input */
534 "1"(*ebx),
535 "2"(*ecx),
536 "3"(*edx)
537 /* No clobbered registers */
538 );
539}
540#endif
541
542static NOINLINE void print_intel_cstates(void)
543{
544#ifdef __i386__
545 int bios_table[8] = { 0 };
546 int nbios = 0;
547 DIR *cpudir;
548 struct dirent *d;
549 int i;
550 unsigned eax, ebx, ecx, edx;
551
552 cpudir = opendir("/sys/devices/system/cpu");
553 if (!cpudir)
554 return;
555
556 /* Loop over cpuN entries */
557 while ((d = readdir(cpudir)) != NULL) {
558 DIR *dir;
559 int len;
560 char fname[sizeof("/sys/devices/system/cpu//cpuidle//desc") + 2*BIG_SYSNAME_LEN];
561
562 len = strlen(d->d_name);
563 if (len < 3 || len > BIG_SYSNAME_LEN)
564 continue;
565
566 if (!isdigit(d->d_name[3]))
567 continue;
568
569 len = sprintf(fname, "/sys/devices/system/cpu/%s/cpuidle", d->d_name);
570 dir = opendir(fname);
571 if (!dir)
572 continue;
573
574 /*
575 * Every C-state has its own stateN directory, that
576 * contains a 'time' and a 'usage' file.
577 */
578 while ((d = readdir(dir)) != NULL) {
579 FILE *fp;
580 char buf[64];
581 int n;
582
583 n = strlen(d->d_name);
584 if (n < 3 || n > BIG_SYSNAME_LEN)
585 continue;
586
587 sprintf(fname + len, "/%s/desc", d->d_name);
588 fp = fopen_for_read(fname);
589 if (fp) {
590 char *p = fgets(buf, sizeof(buf), fp);
591 fclose(fp);
592 if (!p)
593 break;
594 p = strstr(p, "MWAIT ");
595 if (p) {
596 int pos;
597 p += sizeof("MWAIT ") - 1;
598 pos = (bb_strtoull(p, NULL, 16) >> 4) + 1;
599 if (pos >= ARRAY_SIZE(bios_table))
600 continue;
601 bios_table[pos]++;
602 nbios++;
603 }
604 }
605 }
606 closedir(dir);
607 }
608 closedir(cpudir);
609
610 if (!nbios)
611 return;
612
613 eax = 5;
614 ebx = ecx = edx = 0;
615 cpuid(&eax, &ebx, &ecx, &edx);
616 if (!edx || !(ecx & 1))
617 return;
618
619 printf("Your CPU supports the following C-states: ");
620 i = 0;
621 while (edx) {
622 if (edx & 7)
623 printf("C%u ", i);
624 edx >>= 4;
625 i++;
626 }
627 bb_putchar('\n');
628
629 /* Print BIOS C-States */
630 printf("Your BIOS reports the following C-states: ");
631 for (i = 0; i < 8; i++)
632 if (bios_table[i])
633 printf("C%u ", i);
634
635 bb_putchar('\n');
636#endif
637}
638
639static void show_timerstats(void)
640{
641 unsigned lines;
642
643 /* Get terminal height */
644 get_terminal_width_height(STDOUT_FILENO, NULL, &lines);
645
646 /* We don't have whole terminal just for timerstats */
647 lines -= 12;
648
649 if (!G.cant_enable_timer_stats) {
650 int i, n = 0;
651 char strbuf6[6];
652
653 strbuf6[5] = '\0';
654 puts("\nTop causes for wakeups:");
655 for (i = 0; i < G.lines_cnt; i++) {
656 if ((G.lines[i].count > 0 /*|| G.lines[i].disk_count > 0*/)
657 && n++ < lines
658 ) {
659 /* NB: upstream powertop prints "(wakeups/sec)",
660 * we print just "(wakeup counts)".
661 */
662 /*char c = ' ';
663 if (G.lines[i].disk_count)
664 c = 'D';*/
665 smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY");
666 printf(/*" %5.1f%% (%s)%c %s\n"*/
667 " %5.1f%% (%s) %s\n",
668 G.lines[i].count * 100.0 / G.lines_cumulative_count,
669 strbuf6, /*c,*/
670 G.lines[i].string);
671 }
672 }
673 } else {
674 bb_putchar('\n');
675 bb_error_msg("no stats available; run as root or"
676 " enable the cpufreq_stats module");
677 }
678}
679
680// Example display from powertop version 1.11
681// Cn Avg residency P-states (frequencies)
682// C0 (cpu running) ( 0.5%) 2.00 Ghz 0.0%
683// polling 0.0ms ( 0.0%) 1.67 Ghz 0.0%
684// C1 mwait 0.0ms ( 0.0%) 1333 Mhz 0.1%
685// C2 mwait 0.1ms ( 0.1%) 1000 Mhz 99.9%
686// C3 mwait 12.1ms (99.4%)
687//
688// Wakeups-from-idle per second : 93.6 interval: 15.0s
689// no ACPI power usage estimate available
690//
691// Top causes for wakeups:
692// 32.4% ( 26.7) <interrupt> : extra timer interrupt
693// 29.0% ( 23.9) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
694// 9.0% ( 7.5) <kernel core> : hrtimer_start (tick_sched_timer)
695// 6.5% ( 5.3) <interrupt> : ata_piix
696// 5.0% ( 4.1) inetd : hrtimer_start_range_ns (hrtimer_wakeup)
697
698//usage:#define powertop_trivial_usage
699//usage: ""
700//usage:#define powertop_full_usage "\n\n"
701//usage: "Analyze power consumption on Intel-based laptops\n"
702
703int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
704int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)
705{
706 ullong cur_usage[MAX_CSTATE_COUNT];
707 ullong cur_duration[MAX_CSTATE_COUNT];
708 char cstate_lines[MAX_CSTATE_COUNT + 2][64];
709#if ENABLE_FEATURE_USE_TERMIOS
710 struct termios new_settings;
711 struct pollfd pfd[1];
712
713 pfd[0].fd = 0;
714 pfd[0].events = POLLIN;
715#endif
716
717 INIT_G();
718
719#if ENABLE_FEATURE_POWERTOP_PROCIRQ && BLOATY_HPET_IRQ_NUM_DETECTION
720 G.percpu_hpet_start = INT_MAX;
721 G.percpu_hpet_end = INT_MIN;
722#endif
723
724 /* Print warning when we don't have superuser privileges */
725 if (geteuid() != 0)
726 bb_error_msg("run as root to collect enough information");
727
728 /* Get number of CPUs */
729 G.total_cpus = get_cpu_count();
730
731 printf("Collecting data for "DEFAULT_SLEEP_STR" seconds\n");
732
733#if ENABLE_FEATURE_USE_TERMIOS
734 tcgetattr(0, (void *)&G.init_settings);
735 memcpy(&new_settings, &G.init_settings, sizeof(new_settings));
736 /* Turn on unbuffered input, turn off echoing */
737 new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
738 /* So we don't forget to reset term settings */
739 atexit(reset_term);
740 bb_signals(BB_FATAL_SIGS, sig_handler);
741 tcsetattr_stdin_TCSANOW(&new_settings);
742#endif
743
744 /* Collect initial data */
745 process_irq_counts();
746
747 /* Read initial usage and duration */
748 read_cstate_counts(G.start_usage, G.start_duration);
749
750 /* Copy them to "last" */
751 memcpy(G.last_usage, G.start_usage, sizeof(G.last_usage));
752 memcpy(G.last_duration, G.start_duration, sizeof(G.last_duration));
753
754 /* Display C-states */
755 print_intel_cstates();
756
757 G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
758
759 /* The main loop */
760 for (;;) {
761 //double maxsleep = 0.0;
762 ullong totalticks, totalevents;
763 int i;
764
765 G.cant_enable_timer_stats |= start_timer(); /* 1 on error */
766#if !ENABLE_FEATURE_USE_TERMIOS
767 sleep(DEFAULT_SLEEP);
768#else
769 if (safe_poll(pfd, 1, DEFAULT_SLEEP * 1000) > 0) {
770 unsigned char c;
771 if (safe_read(STDIN_FILENO, &c, 1) != 1)
772 break; /* EOF/error */
773 if (c == G.init_settings.c_cc[VINTR])
774 break; /* ^C */
775 if ((c | 0x20) == 'q')
776 break;
777 }
778#endif
779 G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
780
781 clear_lines();
782 process_irq_counts();
783
784 /* Clear the stats */
785 memset(cur_duration, 0, sizeof(cur_duration));
786 memset(cur_usage, 0, sizeof(cur_usage));
787
788 /* Read them */
789 read_cstate_counts(cur_usage, cur_duration);
790
791 /* Count totalticks and totalevents */
792 totalticks = totalevents = 0;
793 for (i = 0; i < MAX_CSTATE_COUNT; i++) {
794 if (cur_usage[i] != 0) {
795 totalticks += cur_duration[i] - G.last_duration[i];
796 totalevents += cur_usage[i] - G.last_usage[i];
797 }
798 }
799
800 /* Clear the screen */
801 printf("\033[H\033[J");
802
803 /* Clear C-state lines */
804 memset(&cstate_lines, 0, sizeof(cstate_lines));
805
806 if (totalevents == 0 && G.maxcstate <= 1) {
807 /* This should not happen */
808 strcpy(cstate_lines[0], "C-state information is not available\n");
809 } else {
810 double percentage;
811 unsigned newticks;
812
813 newticks = G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000 - totalticks;
814 /* Handle rounding errors: do not display negative values */
815 if ((int)newticks < 0)
816 newticks = 0;
817
818 sprintf(cstate_lines[0], "Cn\t\t Avg residency\n");
819 percentage = newticks * 100.0 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
820 sprintf(cstate_lines[1], "C0 (cpu running) (%4.1f%%)\n", percentage);
821
822 /* Compute values for individual C-states */
823 for (i = 0; i < MAX_CSTATE_COUNT; i++) {
824 if (cur_usage[i] != 0) {
825 double slept;
826 slept = (cur_duration[i] - G.last_duration[i])
827 / (cur_usage[i] - G.last_usage[i] + 0.1) / FREQ_ACPI;
828 percentage = (cur_duration[i] - G.last_duration[i]) * 100
829 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
830 sprintf(cstate_lines[i + 2], "C%u\t\t%5.1fms (%4.1f%%)\n",
831 i + 1, slept, percentage);
832 //if (maxsleep < slept)
833 // maxsleep = slept;
834 }
835 }
836 }
837
838 for (i = 0; i < MAX_CSTATE_COUNT + 2; i++)
839 if (cstate_lines[i][0])
840 fputs(cstate_lines[i], stdout);
841
842 i = process_timer_stats();
843#if ENABLE_FEATURE_POWERTOP_PROCIRQ
844 if (totalevents == 0) {
845 /* No C-state info available, use timerstats */
846 totalevents = i * G.total_cpus + G.total_interrupt;
847 if (i < 0)
848 totalevents += G.interrupt_0 - i;
849 }
850#endif
851 /* Upstream powertop prints wakeups per sec per CPU,
852 * we print just raw wakeup counts.
853 */
854//TODO: show real seconds (think about manual refresh)
855 printf("\nWakeups-from-idle in %u seconds: %llu\n",
856 DEFAULT_SLEEP,
857 totalevents
858 );
859
860 update_lines_cumulative_count();
861 sort_lines();
862 show_timerstats();
863 fflush(stdout);
864
865 /* Clear the stats */
866 memset(cur_duration, 0, sizeof(cur_duration));
867 memset(cur_usage, 0, sizeof(cur_usage));
868
869 /* Get new values */
870 read_cstate_counts(cur_usage, cur_duration);
871
872 /* Save them */
873 memcpy(G.last_usage, cur_usage, sizeof(G.last_usage));
874 memcpy(G.last_duration, cur_duration, sizeof(G.last_duration));
875 } /* for (;;) */
876
877 bb_putchar('\n');
878
879 return EXIT_SUCCESS;
880}
diff --git a/procps/top.c b/procps/top.c
index 4f37878de..f9106fac7 100644
--- a/procps/top.c
+++ b/procps/top.c
@@ -649,8 +649,9 @@ static void reset_term(void)
649static void sig_catcher(int sig UNUSED_PARAM) 649static void sig_catcher(int sig UNUSED_PARAM)
650{ 650{
651 reset_term(); 651 reset_term();
652 exit(EXIT_FAILURE); 652 _exit(EXIT_FAILURE);
653} 653}
654
654#endif /* FEATURE_USE_TERMIOS */ 655#endif /* FEATURE_USE_TERMIOS */
655 656
656/* 657/*
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-03-29 11:34:59 +0000