blob: 71207bac17b44be0f73ca03597a5e041d882a0ab
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * A tiny 'top' utility. |
4 | * |
5 | * This is written specifically for the linux /proc/<PID>/stat(m) |
6 | * files format. |
7 | * |
8 | * This reads the PIDs of all processes and their status and shows |
9 | * the status of processes (first ones that fit to screen) at given |
10 | * intervals. |
11 | * |
12 | * NOTES: |
13 | * - At startup this changes to /proc, all the reads are then |
14 | * relative to that. |
15 | * |
16 | * (C) Eero Tamminen <oak at welho dot com> |
17 | * |
18 | * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru> |
19 | * |
20 | * Sept 2008: Vineet Gupta <vineet.gupta@arc.com> |
21 | * Added Support for reporting SMP Information |
22 | * - CPU where process was last seen running |
23 | * (to see effect of sched_setaffinity() etc) |
24 | * - CPU time split (idle/IO/wait etc) per CPU |
25 | * |
26 | * Copyright (c) 1992 Branko Lankester |
27 | * Copyright (c) 1992 Roger Binns |
28 | * Copyright (C) 1994-1996 Charles L. Blake. |
29 | * Copyright (C) 1992-1998 Michael K. Johnson |
30 | * |
31 | * Licensed under GPLv2, see file LICENSE in this source tree. |
32 | */ |
33 | /* How to snapshot /proc for debugging top problems: |
34 | * for f in /proc/[0-9]*""/stat; do |
35 | * n=${f#/proc/} |
36 | * n=${n%/stat}_stat |
37 | * cp $f $n |
38 | * done |
39 | * cp /proc/stat /proc/meminfo /proc/loadavg . |
40 | * top -bn1 >top.out |
41 | * |
42 | * ...and how to run top on it on another machine: |
43 | * rm -rf proc; mkdir proc |
44 | * for f in [0-9]*_stat; do |
45 | * p=${f%_stat} |
46 | * mkdir -p proc/$p |
47 | * cp $f proc/$p/stat |
48 | * done |
49 | * cp stat meminfo loadavg proc |
50 | * chroot . ./top -bn1 >top1.out |
51 | */ |
52 | //config:config TOP |
53 | //config: bool "top" |
54 | //config: default y |
55 | //config: help |
56 | //config: The top program provides a dynamic real-time view of a running |
57 | //config: system. |
58 | //config: |
59 | //config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE |
60 | //config: bool "Show CPU per-process usage percentage" |
61 | //config: default y |
62 | //config: depends on TOP |
63 | //config: help |
64 | //config: Make top display CPU usage for each process. |
65 | //config: This adds about 2k. |
66 | //config: |
67 | //config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS |
68 | //config: bool "Show CPU global usage percentage" |
69 | //config: default y |
70 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE |
71 | //config: help |
72 | //config: Makes top display "CPU: NN% usr NN% sys..." line. |
73 | //config: This adds about 0.5k. |
74 | //config: |
75 | //config:config FEATURE_TOP_SMP_CPU |
76 | //config: bool "SMP CPU usage display ('c' key)" |
77 | //config: default y |
78 | //config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS |
79 | //config: help |
80 | //config: Allow 'c' key to switch between individual/cumulative CPU stats |
81 | //config: This adds about 0.5k. |
82 | //config: |
83 | //config:config FEATURE_TOP_DECIMALS |
84 | //config: bool "Show 1/10th of a percent in CPU/mem statistics" |
85 | //config: default y |
86 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE |
87 | //config: help |
88 | //config: Show 1/10th of a percent in CPU/mem statistics. |
89 | //config: This adds about 0.3k. |
90 | //config: |
91 | //config:config FEATURE_TOP_SMP_PROCESS |
92 | //config: bool "Show CPU process runs on ('j' field)" |
93 | //config: default y |
94 | //config: depends on TOP |
95 | //config: help |
96 | //config: Show CPU where process was last found running on. |
97 | //config: This is the 'j' field. |
98 | //config: |
99 | //config:config FEATURE_TOPMEM |
100 | //config: bool "Topmem command ('s' key)" |
101 | //config: default y |
102 | //config: depends on TOP |
103 | //config: help |
104 | //config: Enable 's' in top (gives lots of memory info). |
105 | |
106 | //applet:IF_TOP(APPLET(top, BB_DIR_USR_BIN, BB_SUID_DROP)) |
107 | |
108 | //kbuild:lib-$(CONFIG_TOP) += top.o |
109 | |
110 | #include "libbb.h" |
111 | #include "common_bufsiz.h" |
112 | |
113 | |
114 | typedef struct top_status_t { |
115 | unsigned long vsz; |
116 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
117 | unsigned long ticks; |
118 | unsigned pcpu; /* delta of ticks */ |
119 | #endif |
120 | unsigned pid, ppid; |
121 | unsigned uid; |
122 | char state[4]; |
123 | char comm[COMM_LEN]; |
124 | #if ENABLE_FEATURE_TOP_SMP_PROCESS |
125 | int last_seen_on_cpu; |
126 | #endif |
127 | } top_status_t; |
128 | |
129 | typedef struct jiffy_counts_t { |
130 | /* Linux 2.4.x has only first four */ |
131 | unsigned long long usr, nic, sys, idle; |
132 | unsigned long long iowait, irq, softirq, steal; |
133 | unsigned long long total; |
134 | unsigned long long busy; |
135 | } jiffy_counts_t; |
136 | |
137 | /* This structure stores some critical information from one frame to |
138 | the next. Used for finding deltas. */ |
139 | typedef struct save_hist { |
140 | unsigned long ticks; |
141 | pid_t pid; |
142 | } save_hist; |
143 | |
144 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q); |
145 | |
146 | |
147 | enum { SORT_DEPTH = 3 }; |
148 | |
149 | |
150 | struct globals { |
151 | top_status_t *top; |
152 | int ntop; |
153 | smallint inverted; |
154 | #if ENABLE_FEATURE_TOPMEM |
155 | smallint sort_field; |
156 | #endif |
157 | #if ENABLE_FEATURE_TOP_SMP_CPU |
158 | smallint smp_cpu_info; /* one/many cpu info lines? */ |
159 | #endif |
160 | unsigned lines; /* screen height */ |
161 | #if ENABLE_FEATURE_USE_TERMIOS |
162 | struct termios initial_settings; |
163 | int scroll_ofs; |
164 | #define G_scroll_ofs G.scroll_ofs |
165 | #else |
166 | #define G_scroll_ofs 0 |
167 | #endif |
168 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
169 | cmp_funcp sort_function[1]; |
170 | #else |
171 | cmp_funcp sort_function[SORT_DEPTH]; |
172 | struct save_hist *prev_hist; |
173 | int prev_hist_count; |
174 | jiffy_counts_t cur_jif, prev_jif; |
175 | /* int hist_iterations; */ |
176 | unsigned total_pcpu; |
177 | /* unsigned long total_vsz; */ |
178 | #endif |
179 | #if ENABLE_FEATURE_TOP_SMP_CPU |
180 | /* Per CPU samples: current and last */ |
181 | jiffy_counts_t *cpu_jif, *cpu_prev_jif; |
182 | int num_cpus; |
183 | #endif |
184 | #if ENABLE_FEATURE_USE_TERMIOS |
185 | char kbd_input[KEYCODE_BUFFER_SIZE]; |
186 | #endif |
187 | char line_buf[80]; |
188 | }; //FIX_ALIASING; - large code growth |
189 | enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) }; |
190 | #define G (*(struct globals*)bb_common_bufsiz1) |
191 | #define top (G.top ) |
192 | #define ntop (G.ntop ) |
193 | #define sort_field (G.sort_field ) |
194 | #define inverted (G.inverted ) |
195 | #define smp_cpu_info (G.smp_cpu_info ) |
196 | #define initial_settings (G.initial_settings ) |
197 | #define sort_function (G.sort_function ) |
198 | #define prev_hist (G.prev_hist ) |
199 | #define prev_hist_count (G.prev_hist_count ) |
200 | #define cur_jif (G.cur_jif ) |
201 | #define prev_jif (G.prev_jif ) |
202 | #define cpu_jif (G.cpu_jif ) |
203 | #define cpu_prev_jif (G.cpu_prev_jif ) |
204 | #define num_cpus (G.num_cpus ) |
205 | #define total_pcpu (G.total_pcpu ) |
206 | #define line_buf (G.line_buf ) |
207 | #define INIT_G() do { \ |
208 | setup_common_bufsiz(); \ |
209 | BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \ |
210 | BUILD_BUG_ON(LINE_BUF_SIZE <= 80); \ |
211 | } while (0) |
212 | |
213 | enum { |
214 | OPT_d = (1 << 0), |
215 | OPT_n = (1 << 1), |
216 | OPT_b = (1 << 2), |
217 | OPT_m = (1 << 3), |
218 | OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */ |
219 | }; |
220 | #define OPT_BATCH_MODE (option_mask32 & OPT_b) |
221 | |
222 | |
223 | #if ENABLE_FEATURE_USE_TERMIOS |
224 | static int pid_sort(top_status_t *P, top_status_t *Q) |
225 | { |
226 | /* Buggy wrt pids with high bit set */ |
227 | /* (linux pids are in [1..2^15-1]) */ |
228 | return (Q->pid - P->pid); |
229 | } |
230 | #endif |
231 | |
232 | static int mem_sort(top_status_t *P, top_status_t *Q) |
233 | { |
234 | /* We want to avoid unsigned->signed and truncation errors */ |
235 | if (Q->vsz < P->vsz) return -1; |
236 | return Q->vsz != P->vsz; /* 0 if ==, 1 if > */ |
237 | } |
238 | |
239 | |
240 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
241 | |
242 | static int pcpu_sort(top_status_t *P, top_status_t *Q) |
243 | { |
244 | /* Buggy wrt ticks with high bit set */ |
245 | /* Affects only processes for which ticks overflow */ |
246 | return (int)Q->pcpu - (int)P->pcpu; |
247 | } |
248 | |
249 | static int time_sort(top_status_t *P, top_status_t *Q) |
250 | { |
251 | /* We want to avoid unsigned->signed and truncation errors */ |
252 | if (Q->ticks < P->ticks) return -1; |
253 | return Q->ticks != P->ticks; /* 0 if ==, 1 if > */ |
254 | } |
255 | |
256 | static int mult_lvl_cmp(void* a, void* b) |
257 | { |
258 | int i, cmp_val; |
259 | |
260 | for (i = 0; i < SORT_DEPTH; i++) { |
261 | cmp_val = (*sort_function[i])(a, b); |
262 | if (cmp_val != 0) |
263 | break; |
264 | } |
265 | return inverted ? -cmp_val : cmp_val; |
266 | } |
267 | |
268 | static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif) |
269 | { |
270 | #if !ENABLE_FEATURE_TOP_SMP_CPU |
271 | static const char fmt[] ALIGN1 = "cpu %llu %llu %llu %llu %llu %llu %llu %llu"; |
272 | #else |
273 | static const char fmt[] ALIGN1 = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu"; |
274 | #endif |
275 | int ret; |
276 | |
277 | if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */) |
278 | return 0; |
279 | ret = sscanf(line_buf, fmt, |
280 | &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle, |
281 | &p_jif->iowait, &p_jif->irq, &p_jif->softirq, |
282 | &p_jif->steal); |
283 | if (ret >= 4) { |
284 | p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle |
285 | + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal; |
286 | /* procps 2.x does not count iowait as busy time */ |
287 | p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait; |
288 | } |
289 | |
290 | return ret; |
291 | } |
292 | |
293 | static void get_jiffy_counts(void) |
294 | { |
295 | FILE* fp = xfopen_for_read("stat"); |
296 | |
297 | /* We need to parse cumulative counts even if SMP CPU display is on, |
298 | * they are used to calculate per process CPU% */ |
299 | prev_jif = cur_jif; |
300 | if (read_cpu_jiffy(fp, &cur_jif) < 4) |
301 | bb_error_msg_and_die("can't read '%s'", "/proc/stat"); |
302 | |
303 | #if !ENABLE_FEATURE_TOP_SMP_CPU |
304 | fclose(fp); |
305 | return; |
306 | #else |
307 | if (!smp_cpu_info) { |
308 | fclose(fp); |
309 | return; |
310 | } |
311 | |
312 | if (!num_cpus) { |
313 | /* First time here. How many CPUs? |
314 | * There will be at least 1 /proc/stat line with cpu%d |
315 | */ |
316 | while (1) { |
317 | cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus); |
318 | if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4) |
319 | break; |
320 | num_cpus++; |
321 | } |
322 | if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */ |
323 | smp_cpu_info = 0; |
324 | |
325 | cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus); |
326 | |
327 | /* Otherwise the first per cpu display shows all 100% idles */ |
328 | usleep(50000); |
329 | } else { /* Non first time invocation */ |
330 | jiffy_counts_t *tmp; |
331 | int i; |
332 | |
333 | /* First switch the sample pointers: no need to copy */ |
334 | tmp = cpu_prev_jif; |
335 | cpu_prev_jif = cpu_jif; |
336 | cpu_jif = tmp; |
337 | |
338 | /* Get the new samples */ |
339 | for (i = 0; i < num_cpus; i++) |
340 | read_cpu_jiffy(fp, &cpu_jif[i]); |
341 | } |
342 | #endif |
343 | fclose(fp); |
344 | } |
345 | |
346 | static void do_stats(void) |
347 | { |
348 | top_status_t *cur; |
349 | pid_t pid; |
350 | int i, last_i, n; |
351 | struct save_hist *new_hist; |
352 | |
353 | get_jiffy_counts(); |
354 | total_pcpu = 0; |
355 | /* total_vsz = 0; */ |
356 | new_hist = xmalloc(sizeof(new_hist[0]) * ntop); |
357 | /* |
358 | * Make a pass through the data to get stats. |
359 | */ |
360 | /* hist_iterations = 0; */ |
361 | i = 0; |
362 | for (n = 0; n < ntop; n++) { |
363 | cur = top + n; |
364 | |
365 | /* |
366 | * Calculate time in cur process. Time is sum of user time |
367 | * and system time |
368 | */ |
369 | pid = cur->pid; |
370 | new_hist[n].ticks = cur->ticks; |
371 | new_hist[n].pid = pid; |
372 | |
373 | /* find matching entry from previous pass */ |
374 | cur->pcpu = 0; |
375 | /* do not start at index 0, continue at last used one |
376 | * (brought hist_iterations from ~14000 down to 172) */ |
377 | last_i = i; |
378 | if (prev_hist_count) do { |
379 | if (prev_hist[i].pid == pid) { |
380 | cur->pcpu = cur->ticks - prev_hist[i].ticks; |
381 | total_pcpu += cur->pcpu; |
382 | break; |
383 | } |
384 | i = (i+1) % prev_hist_count; |
385 | /* hist_iterations++; */ |
386 | } while (i != last_i); |
387 | /* total_vsz += cur->vsz; */ |
388 | } |
389 | |
390 | /* |
391 | * Save cur frame's information. |
392 | */ |
393 | free(prev_hist); |
394 | prev_hist = new_hist; |
395 | prev_hist_count = ntop; |
396 | } |
397 | |
398 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */ |
399 | |
400 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS |
401 | /* formats 7 char string (8 with terminating NUL) */ |
402 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total) |
403 | { |
404 | unsigned t; |
405 | if (value >= total) { /* 100% ? */ |
406 | strcpy(pbuf, " 100% "); |
407 | return pbuf; |
408 | } |
409 | /* else generate " [N/space]N.N% " string */ |
410 | value = 1000 * value / total; |
411 | t = value / 100; |
412 | value = value % 100; |
413 | pbuf[0] = ' '; |
414 | pbuf[1] = t ? t + '0' : ' '; |
415 | pbuf[2] = '0' + (value / 10); |
416 | pbuf[3] = '.'; |
417 | pbuf[4] = '0' + (value % 10); |
418 | pbuf[5] = '%'; |
419 | pbuf[6] = ' '; |
420 | pbuf[7] = '\0'; |
421 | return pbuf; |
422 | } |
423 | #endif |
424 | |
425 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS |
426 | static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p) |
427 | { |
428 | /* |
429 | * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100% |
430 | */ |
431 | unsigned total_diff; |
432 | jiffy_counts_t *p_jif, *p_prev_jif; |
433 | int i; |
434 | # if ENABLE_FEATURE_TOP_SMP_CPU |
435 | int n_cpu_lines; |
436 | # endif |
437 | |
438 | /* using (unsigned) casts to make operations cheaper */ |
439 | # define CALC_TOTAL_DIFF do { \ |
440 | total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \ |
441 | if (total_diff == 0) total_diff = 1; \ |
442 | } while (0) |
443 | |
444 | # if ENABLE_FEATURE_TOP_DECIMALS |
445 | # define CALC_STAT(xxx) char xxx[8] |
446 | # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff) |
447 | # define FMT "%s" |
448 | # else |
449 | # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff |
450 | # define SHOW_STAT(xxx) xxx |
451 | # define FMT "%4u%% " |
452 | # endif |
453 | |
454 | # if !ENABLE_FEATURE_TOP_SMP_CPU |
455 | { |
456 | i = 1; |
457 | p_jif = &cur_jif; |
458 | p_prev_jif = &prev_jif; |
459 | # else |
460 | /* Loop thru CPU(s) */ |
461 | n_cpu_lines = smp_cpu_info ? num_cpus : 1; |
462 | if (n_cpu_lines > *lines_rem_p) |
463 | n_cpu_lines = *lines_rem_p; |
464 | |
465 | for (i = 0; i < n_cpu_lines; i++) { |
466 | p_jif = &cpu_jif[i]; |
467 | p_prev_jif = &cpu_prev_jif[i]; |
468 | # endif |
469 | CALC_TOTAL_DIFF; |
470 | |
471 | { /* Need a block: CALC_STAT are declarations */ |
472 | CALC_STAT(usr); |
473 | CALC_STAT(sys); |
474 | CALC_STAT(nic); |
475 | CALC_STAT(idle); |
476 | CALC_STAT(iowait); |
477 | CALC_STAT(irq); |
478 | CALC_STAT(softirq); |
479 | /*CALC_STAT(steal);*/ |
480 | |
481 | snprintf(scrbuf, scr_width, |
482 | /* Barely fits in 79 chars when in "decimals" mode. */ |
483 | # if ENABLE_FEATURE_TOP_SMP_CPU |
484 | "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq", |
485 | (smp_cpu_info ? utoa(i) : ""), |
486 | # else |
487 | "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq", |
488 | # endif |
489 | SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle), |
490 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq) |
491 | /*, SHOW_STAT(steal) - what is this 'steal' thing? */ |
492 | /* I doubt anyone wants to know it */ |
493 | ); |
494 | puts(scrbuf); |
495 | } |
496 | } |
497 | # undef SHOW_STAT |
498 | # undef CALC_STAT |
499 | # undef FMT |
500 | *lines_rem_p -= i; |
501 | } |
502 | #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */ |
503 | # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0) |
504 | #endif |
505 | |
506 | enum { |
507 | MI_MEMTOTAL, |
508 | MI_MEMFREE, |
509 | MI_MEMSHARED, |
510 | MI_SHMEM, |
511 | MI_BUFFERS, |
512 | MI_CACHED, |
513 | MI_SWAPTOTAL, |
514 | MI_SWAPFREE, |
515 | MI_DIRTY, |
516 | MI_WRITEBACK, |
517 | MI_ANONPAGES, |
518 | MI_MAPPED, |
519 | MI_SLAB, |
520 | MI_MAX |
521 | }; |
522 | |
523 | static void parse_meminfo(unsigned long meminfo[MI_MAX]) |
524 | { |
525 | static const char fields[] ALIGN1 = |
526 | "MemTotal\0" |
527 | "MemFree\0" |
528 | "MemShared\0" |
529 | "Shmem\0" |
530 | "Buffers\0" |
531 | "Cached\0" |
532 | "SwapTotal\0" |
533 | "SwapFree\0" |
534 | "Dirty\0" |
535 | "Writeback\0" |
536 | "AnonPages\0" |
537 | "Mapped\0" |
538 | "Slab\0"; |
539 | char buf[60]; /* actual lines we expect are ~30 chars or less */ |
540 | FILE *f; |
541 | int i; |
542 | |
543 | memset(meminfo, 0, sizeof(meminfo[0]) * MI_MAX); |
544 | f = xfopen_for_read("meminfo"); |
545 | while (fgets(buf, sizeof(buf), f) != NULL) { |
546 | char *c = strchr(buf, ':'); |
547 | if (!c) |
548 | continue; |
549 | *c = '\0'; |
550 | i = index_in_strings(fields, buf); |
551 | if (i >= 0) |
552 | meminfo[i] = strtoul(c+1, NULL, 10); |
553 | } |
554 | fclose(f); |
555 | } |
556 | |
557 | static unsigned long display_header(int scr_width, int *lines_rem_p) |
558 | { |
559 | char scrbuf[100]; /* [80] was a bit too low on 8Gb ram box */ |
560 | char *buf; |
561 | unsigned long meminfo[MI_MAX]; |
562 | |
563 | parse_meminfo(meminfo); |
564 | |
565 | /* Output memory info */ |
566 | if (scr_width > (int)sizeof(scrbuf)) |
567 | scr_width = sizeof(scrbuf); |
568 | snprintf(scrbuf, scr_width, |
569 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached", |
570 | meminfo[MI_MEMTOTAL] - meminfo[MI_MEMFREE], |
571 | meminfo[MI_MEMFREE], |
572 | meminfo[MI_MEMSHARED] + meminfo[MI_SHMEM], |
573 | meminfo[MI_BUFFERS], |
574 | meminfo[MI_CACHED]); |
575 | /* Go to top & clear to the end of screen */ |
576 | printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf); |
577 | (*lines_rem_p)--; |
578 | |
579 | /* Display CPU time split as percentage of total time. |
580 | * This displays either a cumulative line or one line per CPU. |
581 | */ |
582 | display_cpus(scr_width, scrbuf, lines_rem_p); |
583 | |
584 | /* Read load average as a string */ |
585 | buf = stpcpy(scrbuf, "Load average: "); |
586 | open_read_close("loadavg", buf, sizeof(scrbuf) - sizeof("Load average: ")); |
587 | scrbuf[scr_width - 1] = '\0'; |
588 | strchrnul(buf, '\n')[0] = '\0'; |
589 | puts(scrbuf); |
590 | (*lines_rem_p)--; |
591 | |
592 | return meminfo[MI_MEMTOTAL]; |
593 | } |
594 | |
595 | static NOINLINE void display_process_list(int lines_rem, int scr_width) |
596 | { |
597 | enum { |
598 | BITS_PER_INT = sizeof(int) * 8 |
599 | }; |
600 | |
601 | top_status_t *s; |
602 | char vsz_str_buf[8]; |
603 | unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */ |
604 | /* xxx_shift and xxx_scale variables allow us to replace |
605 | * expensive divides with multiply and shift */ |
606 | unsigned pmem_shift, pmem_scale, pmem_half; |
607 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
608 | unsigned tmp_unsigned; |
609 | unsigned pcpu_shift, pcpu_scale, pcpu_half; |
610 | unsigned busy_jifs; |
611 | #endif |
612 | |
613 | /* what info of the processes is shown */ |
614 | printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width, |
615 | " PID PPID USER STAT VSZ %VSZ" |
616 | IF_FEATURE_TOP_SMP_PROCESS(" CPU") |
617 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU") |
618 | " COMMAND"); |
619 | lines_rem--; |
620 | |
621 | #if ENABLE_FEATURE_TOP_DECIMALS |
622 | # define UPSCALE 1000 |
623 | # define CALC_STAT(name, val) div_t name = div((val), 10) |
624 | # define SHOW_STAT(name) name.quot, '0'+name.rem |
625 | # define FMT "%3u.%c" |
626 | #else |
627 | # define UPSCALE 100 |
628 | # define CALC_STAT(name, val) unsigned name = (val) |
629 | # define SHOW_STAT(name) name |
630 | # define FMT "%4u%%" |
631 | #endif |
632 | /* |
633 | * %VSZ = s->vsz/MemTotal |
634 | */ |
635 | pmem_shift = BITS_PER_INT-11; |
636 | pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory; |
637 | /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */ |
638 | while (pmem_scale >= 512) { |
639 | pmem_scale /= 4; |
640 | pmem_shift -= 2; |
641 | } |
642 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2); |
643 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
644 | busy_jifs = cur_jif.busy - prev_jif.busy; |
645 | /* This happens if there were lots of short-lived processes |
646 | * between two top updates (e.g. compilation) */ |
647 | if (total_pcpu < busy_jifs) total_pcpu = busy_jifs; |
648 | |
649 | /* |
650 | * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks |
651 | * (pcpu is delta of sys+user time between samples) |
652 | */ |
653 | /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are |
654 | * in 0..~64000 range (HZ*update_interval). |
655 | * we assume that unsigned is at least 32-bit. |
656 | */ |
657 | pcpu_shift = 6; |
658 | pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs; |
659 | if (pcpu_scale == 0) |
660 | pcpu_scale = 1; |
661 | while (pcpu_scale < (1U << (BITS_PER_INT-2))) { |
662 | pcpu_scale *= 4; |
663 | pcpu_shift += 2; |
664 | } |
665 | tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu; |
666 | if (tmp_unsigned != 0) |
667 | pcpu_scale /= tmp_unsigned; |
668 | /* we want (s->pcpu * pcpu_scale) to never overflow */ |
669 | while (pcpu_scale >= 1024) { |
670 | pcpu_scale /= 4; |
671 | pcpu_shift -= 2; |
672 | } |
673 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2); |
674 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */ |
675 | #endif |
676 | |
677 | /* Ok, all preliminary data is ready, go through the list */ |
678 | scr_width += 2; /* account for leading '\n' and trailing NUL */ |
679 | if (lines_rem > ntop - G_scroll_ofs) |
680 | lines_rem = ntop - G_scroll_ofs; |
681 | s = top + G_scroll_ofs; |
682 | while (--lines_rem >= 0) { |
683 | unsigned col; |
684 | CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift); |
685 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
686 | CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift); |
687 | #endif |
688 | |
689 | if (s->vsz >= 100000) |
690 | sprintf(vsz_str_buf, "%6ldm", s->vsz/1024); |
691 | else |
692 | sprintf(vsz_str_buf, "%7lu", s->vsz); |
693 | /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */ |
694 | col = snprintf(line_buf, scr_width, |
695 | "\n" "%5u%6u %-8.8s %s%s" FMT |
696 | IF_FEATURE_TOP_SMP_PROCESS(" %3d") |
697 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT) |
698 | " ", |
699 | s->pid, s->ppid, get_cached_username(s->uid), |
700 | s->state, vsz_str_buf, |
701 | SHOW_STAT(pmem) |
702 | IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu) |
703 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu)) |
704 | ); |
705 | if ((int)(col + 1) < scr_width) |
706 | read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm); |
707 | fputs(line_buf, stdout); |
708 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu, |
709 | cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */ |
710 | s++; |
711 | } |
712 | /* printf(" %d", hist_iterations); */ |
713 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r'); |
714 | fflush_all(); |
715 | } |
716 | #undef UPSCALE |
717 | #undef SHOW_STAT |
718 | #undef CALC_STAT |
719 | #undef FMT |
720 | |
721 | static void clearmems(void) |
722 | { |
723 | clear_username_cache(); |
724 | free(top); |
725 | top = NULL; |
726 | } |
727 | |
728 | #if ENABLE_FEATURE_USE_TERMIOS |
729 | |
730 | static void reset_term(void) |
731 | { |
732 | if (!OPT_BATCH_MODE) |
733 | tcsetattr_stdin_TCSANOW(&initial_settings); |
734 | } |
735 | |
736 | static void sig_catcher(int sig) |
737 | { |
738 | reset_term(); |
739 | kill_myself_with_sig(sig); |
740 | } |
741 | |
742 | #endif /* FEATURE_USE_TERMIOS */ |
743 | |
744 | /* |
745 | * TOPMEM support |
746 | */ |
747 | |
748 | typedef unsigned long mem_t; |
749 | |
750 | typedef struct topmem_status_t { |
751 | unsigned pid; |
752 | char comm[COMM_LEN]; |
753 | /* vsz doesn't count /dev/xxx mappings except /dev/zero */ |
754 | mem_t vsz ; |
755 | mem_t vszrw ; |
756 | mem_t rss ; |
757 | mem_t rss_sh ; |
758 | mem_t dirty ; |
759 | mem_t dirty_sh; |
760 | mem_t stack ; |
761 | } topmem_status_t; |
762 | |
763 | enum { NUM_SORT_FIELD = 7 }; |
764 | |
765 | #define topmem ((topmem_status_t*)top) |
766 | |
767 | #if ENABLE_FEATURE_TOPMEM |
768 | |
769 | static int topmem_sort(char *a, char *b) |
770 | { |
771 | int n; |
772 | mem_t l, r; |
773 | |
774 | n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t)); |
775 | l = *(mem_t*)(a + n); |
776 | r = *(mem_t*)(b + n); |
777 | if (l == r) { |
778 | l = ((topmem_status_t*)a)->dirty; |
779 | r = ((topmem_status_t*)b)->dirty; |
780 | } |
781 | /* We want to avoid unsigned->signed and truncation errors */ |
782 | /* l>r: -1, l=r: 0, l<r: 1 */ |
783 | n = (l > r) ? -1 : (l != r); |
784 | return inverted ? -n : n; |
785 | } |
786 | |
787 | /* display header info (meminfo / loadavg) */ |
788 | static void display_topmem_header(int scr_width, int *lines_rem_p) |
789 | { |
790 | unsigned long meminfo[MI_MAX]; |
791 | |
792 | parse_meminfo(meminfo); |
793 | |
794 | snprintf(line_buf, LINE_BUF_SIZE, |
795 | "Mem total:%lu anon:%lu map:%lu free:%lu", |
796 | meminfo[MI_MEMTOTAL], |
797 | meminfo[MI_ANONPAGES], |
798 | meminfo[MI_MAPPED], |
799 | meminfo[MI_MEMFREE]); |
800 | printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf); |
801 | |
802 | snprintf(line_buf, LINE_BUF_SIZE, |
803 | " slab:%lu buf:%lu cache:%lu dirty:%lu write:%lu", |
804 | meminfo[MI_SLAB], |
805 | meminfo[MI_BUFFERS], |
806 | meminfo[MI_CACHED], |
807 | meminfo[MI_DIRTY], |
808 | meminfo[MI_WRITEBACK]); |
809 | printf("%.*s\n", scr_width, line_buf); |
810 | |
811 | snprintf(line_buf, LINE_BUF_SIZE, |
812 | "Swap total:%lu free:%lu", // TODO: % used? |
813 | meminfo[MI_SWAPTOTAL], |
814 | meminfo[MI_SWAPFREE]); |
815 | printf("%.*s\n", scr_width, line_buf); |
816 | |
817 | (*lines_rem_p) -= 3; |
818 | } |
819 | |
820 | static void ulltoa6_and_space(unsigned long long ul, char buf[6]) |
821 | { |
822 | /* see http://en.wikipedia.org/wiki/Tera */ |
823 | smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' '; |
824 | } |
825 | |
826 | static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width) |
827 | { |
828 | #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK" |
829 | #define MIN_WIDTH sizeof(HDR_STR) |
830 | const topmem_status_t *s = topmem + G_scroll_ofs; |
831 | char *cp, ch; |
832 | |
833 | display_topmem_header(scr_width, &lines_rem); |
834 | |
835 | strcpy(line_buf, HDR_STR " COMMAND"); |
836 | /* Mark the ^FIELD^ we sort by */ |
837 | cp = &line_buf[5 + sort_field * 6]; |
838 | ch = "^_"[inverted]; |
839 | cp[6] = ch; |
840 | do *cp++ = ch; while (*cp == ' '); |
841 | |
842 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf); |
843 | lines_rem--; |
844 | |
845 | if (lines_rem > ntop - G_scroll_ofs) |
846 | lines_rem = ntop - G_scroll_ofs; |
847 | while (--lines_rem >= 0) { |
848 | /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */ |
849 | ulltoa6_and_space(s->pid , &line_buf[0*6]); |
850 | ulltoa6_and_space(s->vsz , &line_buf[1*6]); |
851 | ulltoa6_and_space(s->vszrw , &line_buf[2*6]); |
852 | ulltoa6_and_space(s->rss , &line_buf[3*6]); |
853 | ulltoa6_and_space(s->rss_sh , &line_buf[4*6]); |
854 | ulltoa6_and_space(s->dirty , &line_buf[5*6]); |
855 | ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]); |
856 | ulltoa6_and_space(s->stack , &line_buf[7*6]); |
857 | line_buf[8*6] = '\0'; |
858 | if (scr_width > (int)MIN_WIDTH) { |
859 | read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm); |
860 | } |
861 | printf("\n""%.*s", scr_width, line_buf); |
862 | s++; |
863 | } |
864 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r'); |
865 | fflush_all(); |
866 | #undef HDR_STR |
867 | #undef MIN_WIDTH |
868 | } |
869 | |
870 | #else |
871 | void display_topmem_process_list(int lines_rem, int scr_width); |
872 | int topmem_sort(char *a, char *b); |
873 | #endif /* TOPMEM */ |
874 | |
875 | /* |
876 | * end TOPMEM support |
877 | */ |
878 | |
879 | enum { |
880 | TOP_MASK = 0 |
881 | | PSSCAN_PID |
882 | | PSSCAN_PPID |
883 | | PSSCAN_VSZ |
884 | | PSSCAN_STIME |
885 | | PSSCAN_UTIME |
886 | | PSSCAN_STATE |
887 | | PSSCAN_COMM |
888 | | PSSCAN_CPU |
889 | | PSSCAN_UIDGID, |
890 | TOPMEM_MASK = 0 |
891 | | PSSCAN_PID |
892 | | PSSCAN_SMAPS |
893 | | PSSCAN_COMM, |
894 | EXIT_MASK = (unsigned)-1, |
895 | }; |
896 | |
897 | #if ENABLE_FEATURE_USE_TERMIOS |
898 | static unsigned handle_input(unsigned scan_mask, unsigned interval) |
899 | { |
900 | if (option_mask32 & OPT_EOF) { |
901 | /* EOF on stdin ("top </dev/null") */ |
902 | sleep(interval); |
903 | return scan_mask; |
904 | } |
905 | |
906 | while (1) { |
907 | int32_t c; |
908 | |
909 | c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000); |
910 | if (c == -1 && errno != EAGAIN) { |
911 | /* error/EOF */ |
912 | option_mask32 |= OPT_EOF; |
913 | break; |
914 | } |
915 | interval = 0; |
916 | |
917 | if (c == initial_settings.c_cc[VINTR]) |
918 | return EXIT_MASK; |
919 | if (c == initial_settings.c_cc[VEOF]) |
920 | return EXIT_MASK; |
921 | |
922 | if (c == KEYCODE_UP) { |
923 | G_scroll_ofs--; |
924 | goto normalize_ofs; |
925 | } |
926 | if (c == KEYCODE_DOWN) { |
927 | G_scroll_ofs++; |
928 | goto normalize_ofs; |
929 | } |
930 | if (c == KEYCODE_HOME) { |
931 | G_scroll_ofs = 0; |
932 | break; |
933 | } |
934 | if (c == KEYCODE_END) { |
935 | G_scroll_ofs = ntop - G.lines / 2; |
936 | goto normalize_ofs; |
937 | } |
938 | if (c == KEYCODE_PAGEUP) { |
939 | G_scroll_ofs -= G.lines / 2; |
940 | goto normalize_ofs; |
941 | } |
942 | if (c == KEYCODE_PAGEDOWN) { |
943 | G_scroll_ofs += G.lines / 2; |
944 | normalize_ofs: |
945 | if (G_scroll_ofs >= ntop) |
946 | G_scroll_ofs = ntop - 1; |
947 | if (G_scroll_ofs < 0) |
948 | G_scroll_ofs = 0; |
949 | break; |
950 | } |
951 | |
952 | c |= 0x20; /* lowercase */ |
953 | if (c == 'q') |
954 | return EXIT_MASK; |
955 | |
956 | if (c == 'n') { |
957 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;) |
958 | sort_function[0] = pid_sort; |
959 | continue; |
960 | } |
961 | if (c == 'm') { |
962 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;) |
963 | sort_function[0] = mem_sort; |
964 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
965 | sort_function[1] = pcpu_sort; |
966 | sort_function[2] = time_sort; |
967 | # endif |
968 | continue; |
969 | } |
970 | # if ENABLE_FEATURE_SHOW_THREADS |
971 | if (c == 'h' |
972 | IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK) |
973 | ) { |
974 | scan_mask ^= PSSCAN_TASKS; |
975 | continue; |
976 | } |
977 | # endif |
978 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
979 | if (c == 'p') { |
980 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;) |
981 | sort_function[0] = pcpu_sort; |
982 | sort_function[1] = mem_sort; |
983 | sort_function[2] = time_sort; |
984 | continue; |
985 | } |
986 | if (c == 't') { |
987 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;) |
988 | sort_function[0] = time_sort; |
989 | sort_function[1] = mem_sort; |
990 | sort_function[2] = pcpu_sort; |
991 | continue; |
992 | } |
993 | # if ENABLE_FEATURE_TOPMEM |
994 | if (c == 's') { |
995 | scan_mask = TOPMEM_MASK; |
996 | free(prev_hist); |
997 | prev_hist = NULL; |
998 | prev_hist_count = 0; |
999 | sort_field = (sort_field + 1) % NUM_SORT_FIELD; |
1000 | continue; |
1001 | } |
1002 | # endif |
1003 | if (c == 'r') { |
1004 | inverted ^= 1; |
1005 | continue; |
1006 | } |
1007 | # if ENABLE_FEATURE_TOP_SMP_CPU |
1008 | /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */ |
1009 | if (c == 'c' || c == '1') { |
1010 | /* User wants to toggle per cpu <> aggregate */ |
1011 | if (smp_cpu_info) { |
1012 | free(cpu_prev_jif); |
1013 | free(cpu_jif); |
1014 | cpu_jif = &cur_jif; |
1015 | cpu_prev_jif = &prev_jif; |
1016 | } else { |
1017 | /* Prepare for xrealloc() */ |
1018 | cpu_jif = cpu_prev_jif = NULL; |
1019 | } |
1020 | num_cpus = 0; |
1021 | smp_cpu_info = !smp_cpu_info; |
1022 | get_jiffy_counts(); |
1023 | continue; |
1024 | } |
1025 | # endif |
1026 | # endif |
1027 | break; /* unknown key -> force refresh */ |
1028 | } |
1029 | |
1030 | return scan_mask; |
1031 | } |
1032 | #endif |
1033 | |
1034 | //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU |
1035 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__ |
1036 | //usage:#else |
1037 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) |
1038 | //usage:#endif |
1039 | //usage:#define top_trivial_usage |
1040 | //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]") |
1041 | //usage:#define top_full_usage "\n\n" |
1042 | //usage: "Provide a view of process activity in real time." |
1043 | //usage: "\n""Read the status of all processes from /proc each SECONDS" |
1044 | //usage: "\n""and display a screenful of them." |
1045 | //usage: "\n" |
1046 | //usage: IF_FEATURE_USE_TERMIOS( |
1047 | //usage: "Keys:" |
1048 | //usage: "\n"" N/M" |
1049 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P") |
1050 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T") |
1051 | //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem" |
1052 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu") |
1053 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time") |
1054 | //usage: IF_FEATURE_TOPMEM( |
1055 | //usage: "\n"" S: show memory" |
1056 | //usage: ) |
1057 | //usage: "\n"" R: reverse sort" |
1058 | //usage: IF_SHOW_THREADS_OR_TOP_SMP( |
1059 | //usage: "\n"" " |
1060 | //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads") |
1061 | //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", ")) |
1062 | //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP") |
1063 | //usage: ) |
1064 | //usage: "\n"" Q,^C: exit" |
1065 | //usage: "\n" |
1066 | //usage: "\n""Options:" |
1067 | //usage: ) |
1068 | //usage: "\n"" -b Batch mode" |
1069 | //usage: "\n"" -n N Exit after N iterations" |
1070 | //usage: "\n"" -d N Delay between updates" |
1071 | //usage: IF_FEATURE_TOPMEM( |
1072 | //usage: "\n"" -m Same as 's' key" |
1073 | //usage: ) |
1074 | |
1075 | /* Interactive testing: |
1076 | * echo sss | ./busybox top |
1077 | * - shows memory screen |
1078 | * echo sss | ./busybox top -bn1 >mem |
1079 | * - saves memory screen - the *whole* list, not first NROWS processes! |
1080 | * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z |
1081 | * - saves several different screens, and exits |
1082 | * |
1083 | * TODO: -i STRING param as a better alternative? |
1084 | */ |
1085 | |
1086 | int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
1087 | int top_main(int argc UNUSED_PARAM, char **argv) |
1088 | { |
1089 | int iterations; |
1090 | unsigned col; |
1091 | unsigned interval; |
1092 | char *str_interval, *str_iterations; |
1093 | unsigned scan_mask = TOP_MASK; |
1094 | #if ENABLE_FEATURE_USE_TERMIOS |
1095 | struct termios new_settings; |
1096 | #endif |
1097 | |
1098 | INIT_G(); |
1099 | |
1100 | interval = 5; /* default update interval is 5 seconds */ |
1101 | iterations = 0; /* infinite */ |
1102 | #if ENABLE_FEATURE_TOP_SMP_CPU |
1103 | /*num_cpus = 0;*/ |
1104 | /*smp_cpu_info = 0;*/ /* to start with show aggregate */ |
1105 | cpu_jif = &cur_jif; |
1106 | cpu_prev_jif = &prev_jif; |
1107 | #endif |
1108 | |
1109 | /* all args are options; -n NUM */ |
1110 | opt_complementary = "-"; /* options can be specified w/o dash */ |
1111 | col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations); |
1112 | #if ENABLE_FEATURE_TOPMEM |
1113 | if (col & OPT_m) /* -m (busybox specific) */ |
1114 | scan_mask = TOPMEM_MASK; |
1115 | #endif |
1116 | if (col & OPT_d) { |
1117 | /* work around for "-d 1" -> "-d -1" done by getopt32 |
1118 | * (opt_complementary == "-" does this) */ |
1119 | if (str_interval[0] == '-') |
1120 | str_interval++; |
1121 | /* Need to limit it to not overflow poll timeout */ |
1122 | interval = xatou16(str_interval); |
1123 | } |
1124 | if (col & OPT_n) { |
1125 | if (str_iterations[0] == '-') |
1126 | str_iterations++; |
1127 | iterations = xatou(str_iterations); |
1128 | } |
1129 | |
1130 | /* change to /proc */ |
1131 | xchdir("/proc"); |
1132 | |
1133 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
1134 | sort_function[0] = pcpu_sort; |
1135 | sort_function[1] = mem_sort; |
1136 | sort_function[2] = time_sort; |
1137 | #else |
1138 | sort_function[0] = mem_sort; |
1139 | #endif |
1140 | |
1141 | if (OPT_BATCH_MODE) { |
1142 | option_mask32 |= OPT_EOF; |
1143 | } |
1144 | #if ENABLE_FEATURE_USE_TERMIOS |
1145 | else { |
1146 | tcgetattr(0, (void *) &initial_settings); |
1147 | memcpy(&new_settings, &initial_settings, sizeof(new_settings)); |
1148 | /* unbuffered input, turn off echo */ |
1149 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL); |
1150 | tcsetattr_stdin_TCSANOW(&new_settings); |
1151 | } |
1152 | |
1153 | bb_signals(BB_FATAL_SIGS, sig_catcher); |
1154 | |
1155 | /* Eat initial input, if any */ |
1156 | scan_mask = handle_input(scan_mask, 0); |
1157 | #endif |
1158 | |
1159 | while (scan_mask != EXIT_MASK) { |
1160 | procps_status_t *p = NULL; |
1161 | |
1162 | if (OPT_BATCH_MODE) { |
1163 | G.lines = INT_MAX; |
1164 | col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */ |
1165 | } else { |
1166 | G.lines = 24; /* default */ |
1167 | col = 79; |
1168 | #if ENABLE_FEATURE_USE_TERMIOS |
1169 | /* We output to stdout, we need size of stdout (not stdin)! */ |
1170 | get_terminal_width_height(STDOUT_FILENO, &col, &G.lines); |
1171 | if (G.lines < 5 || col < 10) { |
1172 | sleep(interval); |
1173 | continue; |
1174 | } |
1175 | #endif |
1176 | if (col > LINE_BUF_SIZE - 2) |
1177 | col = LINE_BUF_SIZE - 2; |
1178 | } |
1179 | |
1180 | /* read process IDs & status for all the processes */ |
1181 | ntop = 0; |
1182 | while ((p = procps_scan(p, scan_mask)) != NULL) { |
1183 | int n; |
1184 | |
1185 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) { |
1186 | n = ntop; |
1187 | top = xrealloc_vector(top, 6, ntop++); |
1188 | top[n].pid = p->pid; |
1189 | top[n].ppid = p->ppid; |
1190 | top[n].vsz = p->vsz; |
1191 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
1192 | top[n].ticks = p->stime + p->utime; |
1193 | #endif |
1194 | top[n].uid = p->uid; |
1195 | strcpy(top[n].state, p->state); |
1196 | strcpy(top[n].comm, p->comm); |
1197 | #if ENABLE_FEATURE_TOP_SMP_PROCESS |
1198 | top[n].last_seen_on_cpu = p->last_seen_on_cpu; |
1199 | #endif |
1200 | } |
1201 | #if ENABLE_FEATURE_TOPMEM |
1202 | else { /* TOPMEM */ |
1203 | if (!(p->smaps.mapped_ro | p->smaps.mapped_rw)) |
1204 | continue; /* kernel threads are ignored */ |
1205 | n = ntop; |
1206 | /* No bug here - top and topmem are the same */ |
1207 | top = xrealloc_vector(topmem, 6, ntop++); |
1208 | strcpy(topmem[n].comm, p->comm); |
1209 | topmem[n].pid = p->pid; |
1210 | topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro; |
1211 | topmem[n].vszrw = p->smaps.mapped_rw; |
1212 | topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty; |
1213 | topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh; |
1214 | topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty; |
1215 | topmem[n].dirty_sh = p->smaps.shared_dirty; |
1216 | topmem[n].stack = p->smaps.stack; |
1217 | } |
1218 | #endif |
1219 | } /* end of "while we read /proc" */ |
1220 | if (ntop == 0) { |
1221 | bb_error_msg("no process info in /proc"); |
1222 | break; |
1223 | } |
1224 | |
1225 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) { |
1226 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
1227 | if (!prev_hist_count) { |
1228 | do_stats(); |
1229 | usleep(100000); |
1230 | clearmems(); |
1231 | continue; |
1232 | } |
1233 | do_stats(); |
1234 | /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */ |
1235 | qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp); |
1236 | #else |
1237 | qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0])); |
1238 | #endif |
1239 | display_process_list(G.lines, col); |
1240 | } |
1241 | #if ENABLE_FEATURE_TOPMEM |
1242 | else { /* TOPMEM */ |
1243 | qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort); |
1244 | display_topmem_process_list(G.lines, col); |
1245 | } |
1246 | #endif |
1247 | clearmems(); |
1248 | if (iterations >= 0 && !--iterations) |
1249 | break; |
1250 | #if !ENABLE_FEATURE_USE_TERMIOS |
1251 | sleep(interval); |
1252 | #else |
1253 | scan_mask = handle_input(scan_mask, interval); |
1254 | #endif |
1255 | } /* end of "while (not Q)" */ |
1256 | |
1257 | bb_putchar('\n'); |
1258 | #if ENABLE_FEATURE_USE_TERMIOS |
1259 | reset_term(); |
1260 | #endif |
1261 | if (ENABLE_FEATURE_CLEAN_UP) { |
1262 | clearmems(); |
1263 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE |
1264 | free(prev_hist); |
1265 | #endif |
1266 | } |
1267 | return EXIT_SUCCESS; |
1268 | } |
1269 |