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 |
|
---|
53 | //config:config TOP
|
---|
54 | //config: bool "top"
|
---|
55 | //config: default y
|
---|
56 | //config: help
|
---|
57 | //config: The top program provides a dynamic real-time view of a running
|
---|
58 | //config: system.
|
---|
59 | //config:
|
---|
60 | //config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
61 | //config: bool "Show CPU per-process usage percentage"
|
---|
62 | //config: default y
|
---|
63 | //config: depends on TOP
|
---|
64 | //config: help
|
---|
65 | //config: Make top display CPU usage for each process.
|
---|
66 | //config: This adds about 2k.
|
---|
67 | //config:
|
---|
68 | //config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
|
---|
69 | //config: bool "Show CPU global usage percentage"
|
---|
70 | //config: default y
|
---|
71 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
72 | //config: help
|
---|
73 | //config: Makes top display "CPU: NN% usr NN% sys..." line.
|
---|
74 | //config: This adds about 0.5k.
|
---|
75 | //config:
|
---|
76 | //config:config FEATURE_TOP_SMP_CPU
|
---|
77 | //config: bool "SMP CPU usage display ('c' key)"
|
---|
78 | //config: default y
|
---|
79 | //config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
|
---|
80 | //config: help
|
---|
81 | //config: Allow 'c' key to switch between individual/cumulative CPU stats
|
---|
82 | //config: This adds about 0.5k.
|
---|
83 | //config:
|
---|
84 | //config:config FEATURE_TOP_DECIMALS
|
---|
85 | //config: bool "Show 1/10th of a percent in CPU/mem statistics"
|
---|
86 | //config: default y
|
---|
87 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
88 | //config: help
|
---|
89 | //config: Show 1/10th of a percent in CPU/mem statistics.
|
---|
90 | //config: This adds about 0.3k.
|
---|
91 | //config:
|
---|
92 | //config:config FEATURE_TOP_SMP_PROCESS
|
---|
93 | //config: bool "Show CPU process runs on ('j' field)"
|
---|
94 | //config: default y
|
---|
95 | //config: depends on TOP
|
---|
96 | //config: help
|
---|
97 | //config: Show CPU where process was last found running on.
|
---|
98 | //config: This is the 'j' field.
|
---|
99 | //config:
|
---|
100 | //config:config FEATURE_TOPMEM
|
---|
101 | //config: bool "Topmem command ('s' key)"
|
---|
102 | //config: default y
|
---|
103 | //config: depends on TOP
|
---|
104 | //config: help
|
---|
105 | //config: Enable 's' in top (gives lots of memory info).
|
---|
106 |
|
---|
107 | #include "libbb.h"
|
---|
108 |
|
---|
109 |
|
---|
110 | typedef struct top_status_t {
|
---|
111 | unsigned long vsz;
|
---|
112 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
113 | unsigned long ticks;
|
---|
114 | unsigned pcpu; /* delta of ticks */
|
---|
115 | #endif
|
---|
116 | unsigned pid, ppid;
|
---|
117 | unsigned uid;
|
---|
118 | char state[4];
|
---|
119 | char comm[COMM_LEN];
|
---|
120 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
|
---|
121 | int last_seen_on_cpu;
|
---|
122 | #endif
|
---|
123 | } top_status_t;
|
---|
124 |
|
---|
125 | typedef struct jiffy_counts_t {
|
---|
126 | /* Linux 2.4.x has only first four */
|
---|
127 | unsigned long long usr, nic, sys, idle;
|
---|
128 | unsigned long long iowait, irq, softirq, steal;
|
---|
129 | unsigned long long total;
|
---|
130 | unsigned long long busy;
|
---|
131 | } jiffy_counts_t;
|
---|
132 |
|
---|
133 | /* This structure stores some critical information from one frame to
|
---|
134 | the next. Used for finding deltas. */
|
---|
135 | typedef struct save_hist {
|
---|
136 | unsigned long ticks;
|
---|
137 | pid_t pid;
|
---|
138 | } save_hist;
|
---|
139 |
|
---|
140 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
|
---|
141 |
|
---|
142 |
|
---|
143 | enum { SORT_DEPTH = 3 };
|
---|
144 |
|
---|
145 |
|
---|
146 | struct globals {
|
---|
147 | top_status_t *top;
|
---|
148 | int ntop;
|
---|
149 | smallint inverted;
|
---|
150 | #if ENABLE_FEATURE_TOPMEM
|
---|
151 | smallint sort_field;
|
---|
152 | #endif
|
---|
153 | #if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
154 | smallint smp_cpu_info; /* one/many cpu info lines? */
|
---|
155 | #endif
|
---|
156 | unsigned lines; /* screen height */
|
---|
157 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
158 | struct termios initial_settings;
|
---|
159 | int scroll_ofs;
|
---|
160 | #define G_scroll_ofs G.scroll_ofs
|
---|
161 | #else
|
---|
162 | #define G_scroll_ofs 0
|
---|
163 | #endif
|
---|
164 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
165 | cmp_funcp sort_function[1];
|
---|
166 | #else
|
---|
167 | cmp_funcp sort_function[SORT_DEPTH];
|
---|
168 | struct save_hist *prev_hist;
|
---|
169 | int prev_hist_count;
|
---|
170 | jiffy_counts_t cur_jif, prev_jif;
|
---|
171 | /* int hist_iterations; */
|
---|
172 | unsigned total_pcpu;
|
---|
173 | /* unsigned long total_vsz; */
|
---|
174 | #endif
|
---|
175 | #if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
176 | /* Per CPU samples: current and last */
|
---|
177 | jiffy_counts_t *cpu_jif, *cpu_prev_jif;
|
---|
178 | int num_cpus;
|
---|
179 | #endif
|
---|
180 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
181 | char kbd_input[KEYCODE_BUFFER_SIZE];
|
---|
182 | #endif
|
---|
183 | char line_buf[80];
|
---|
184 | }; //FIX_ALIASING; - large code growth
|
---|
185 | enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
|
---|
186 | #define G (*(struct globals*)&bb_common_bufsiz1)
|
---|
187 | struct BUG_bad_size {
|
---|
188 | char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
|
---|
189 | char BUG_line_buf_too_small[LINE_BUF_SIZE > 80 ? 1 : -1];
|
---|
190 | };
|
---|
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 { } while (0)
|
---|
208 |
|
---|
209 | enum {
|
---|
210 | OPT_d = (1 << 0),
|
---|
211 | OPT_n = (1 << 1),
|
---|
212 | OPT_b = (1 << 2),
|
---|
213 | OPT_m = (1 << 3),
|
---|
214 | OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
|
---|
215 | };
|
---|
216 | #define OPT_BATCH_MODE (option_mask32 & OPT_b)
|
---|
217 |
|
---|
218 |
|
---|
219 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
220 | static int pid_sort(top_status_t *P, top_status_t *Q)
|
---|
221 | {
|
---|
222 | /* Buggy wrt pids with high bit set */
|
---|
223 | /* (linux pids are in [1..2^15-1]) */
|
---|
224 | return (Q->pid - P->pid);
|
---|
225 | }
|
---|
226 | #endif
|
---|
227 |
|
---|
228 | static int mem_sort(top_status_t *P, top_status_t *Q)
|
---|
229 | {
|
---|
230 | /* We want to avoid unsigned->signed and truncation errors */
|
---|
231 | if (Q->vsz < P->vsz) return -1;
|
---|
232 | return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
|
---|
233 | }
|
---|
234 |
|
---|
235 |
|
---|
236 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
237 |
|
---|
238 | static int pcpu_sort(top_status_t *P, top_status_t *Q)
|
---|
239 | {
|
---|
240 | /* Buggy wrt ticks with high bit set */
|
---|
241 | /* Affects only processes for which ticks overflow */
|
---|
242 | return (int)Q->pcpu - (int)P->pcpu;
|
---|
243 | }
|
---|
244 |
|
---|
245 | static int time_sort(top_status_t *P, top_status_t *Q)
|
---|
246 | {
|
---|
247 | /* We want to avoid unsigned->signed and truncation errors */
|
---|
248 | if (Q->ticks < P->ticks) return -1;
|
---|
249 | return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
|
---|
250 | }
|
---|
251 |
|
---|
252 | static int mult_lvl_cmp(void* a, void* b)
|
---|
253 | {
|
---|
254 | int i, cmp_val;
|
---|
255 |
|
---|
256 | for (i = 0; i < SORT_DEPTH; i++) {
|
---|
257 | cmp_val = (*sort_function[i])(a, b);
|
---|
258 | if (cmp_val != 0)
|
---|
259 | break;
|
---|
260 | }
|
---|
261 | return inverted ? -cmp_val : cmp_val;
|
---|
262 | }
|
---|
263 |
|
---|
264 | static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
|
---|
265 | {
|
---|
266 | #if !ENABLE_FEATURE_TOP_SMP_CPU
|
---|
267 | static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
|
---|
268 | #else
|
---|
269 | static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
|
---|
270 | #endif
|
---|
271 | int ret;
|
---|
272 |
|
---|
273 | if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
|
---|
274 | return 0;
|
---|
275 | ret = sscanf(line_buf, fmt,
|
---|
276 | &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
|
---|
277 | &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
|
---|
278 | &p_jif->steal);
|
---|
279 | if (ret >= 4) {
|
---|
280 | p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
|
---|
281 | + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
|
---|
282 | /* procps 2.x does not count iowait as busy time */
|
---|
283 | p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
|
---|
284 | }
|
---|
285 |
|
---|
286 | return ret;
|
---|
287 | }
|
---|
288 |
|
---|
289 | static void get_jiffy_counts(void)
|
---|
290 | {
|
---|
291 | FILE* fp = xfopen_for_read("stat");
|
---|
292 |
|
---|
293 | /* We need to parse cumulative counts even if SMP CPU display is on,
|
---|
294 | * they are used to calculate per process CPU% */
|
---|
295 | prev_jif = cur_jif;
|
---|
296 | if (read_cpu_jiffy(fp, &cur_jif) < 4)
|
---|
297 | bb_error_msg_and_die("can't read /proc/stat");
|
---|
298 |
|
---|
299 | #if !ENABLE_FEATURE_TOP_SMP_CPU
|
---|
300 | fclose(fp);
|
---|
301 | return;
|
---|
302 | #else
|
---|
303 | if (!smp_cpu_info) {
|
---|
304 | fclose(fp);
|
---|
305 | return;
|
---|
306 | }
|
---|
307 |
|
---|
308 | if (!num_cpus) {
|
---|
309 | /* First time here. How many CPUs?
|
---|
310 | * There will be at least 1 /proc/stat line with cpu%d
|
---|
311 | */
|
---|
312 | while (1) {
|
---|
313 | cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
|
---|
314 | if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
|
---|
315 | break;
|
---|
316 | num_cpus++;
|
---|
317 | }
|
---|
318 | if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
|
---|
319 | smp_cpu_info = 0;
|
---|
320 |
|
---|
321 | cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
|
---|
322 |
|
---|
323 | /* Otherwise the first per cpu display shows all 100% idles */
|
---|
324 | usleep(50000);
|
---|
325 | } else { /* Non first time invocation */
|
---|
326 | jiffy_counts_t *tmp;
|
---|
327 | int i;
|
---|
328 |
|
---|
329 | /* First switch the sample pointers: no need to copy */
|
---|
330 | tmp = cpu_prev_jif;
|
---|
331 | cpu_prev_jif = cpu_jif;
|
---|
332 | cpu_jif = tmp;
|
---|
333 |
|
---|
334 | /* Get the new samples */
|
---|
335 | for (i = 0; i < num_cpus; i++)
|
---|
336 | read_cpu_jiffy(fp, &cpu_jif[i]);
|
---|
337 | }
|
---|
338 | #endif
|
---|
339 | fclose(fp);
|
---|
340 | }
|
---|
341 |
|
---|
342 | static void do_stats(void)
|
---|
343 | {
|
---|
344 | top_status_t *cur;
|
---|
345 | pid_t pid;
|
---|
346 | int i, last_i, n;
|
---|
347 | struct save_hist *new_hist;
|
---|
348 |
|
---|
349 | get_jiffy_counts();
|
---|
350 | total_pcpu = 0;
|
---|
351 | /* total_vsz = 0; */
|
---|
352 | new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
|
---|
353 | /*
|
---|
354 | * Make a pass through the data to get stats.
|
---|
355 | */
|
---|
356 | /* hist_iterations = 0; */
|
---|
357 | i = 0;
|
---|
358 | for (n = 0; n < ntop; n++) {
|
---|
359 | cur = top + n;
|
---|
360 |
|
---|
361 | /*
|
---|
362 | * Calculate time in cur process. Time is sum of user time
|
---|
363 | * and system time
|
---|
364 | */
|
---|
365 | pid = cur->pid;
|
---|
366 | new_hist[n].ticks = cur->ticks;
|
---|
367 | new_hist[n].pid = pid;
|
---|
368 |
|
---|
369 | /* find matching entry from previous pass */
|
---|
370 | cur->pcpu = 0;
|
---|
371 | /* do not start at index 0, continue at last used one
|
---|
372 | * (brought hist_iterations from ~14000 down to 172) */
|
---|
373 | last_i = i;
|
---|
374 | if (prev_hist_count) do {
|
---|
375 | if (prev_hist[i].pid == pid) {
|
---|
376 | cur->pcpu = cur->ticks - prev_hist[i].ticks;
|
---|
377 | total_pcpu += cur->pcpu;
|
---|
378 | break;
|
---|
379 | }
|
---|
380 | i = (i+1) % prev_hist_count;
|
---|
381 | /* hist_iterations++; */
|
---|
382 | } while (i != last_i);
|
---|
383 | /* total_vsz += cur->vsz; */
|
---|
384 | }
|
---|
385 |
|
---|
386 | /*
|
---|
387 | * Save cur frame's information.
|
---|
388 | */
|
---|
389 | free(prev_hist);
|
---|
390 | prev_hist = new_hist;
|
---|
391 | prev_hist_count = ntop;
|
---|
392 | }
|
---|
393 |
|
---|
394 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
---|
395 |
|
---|
396 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
|
---|
397 | /* formats 7 char string (8 with terminating NUL) */
|
---|
398 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
|
---|
399 | {
|
---|
400 | unsigned t;
|
---|
401 | if (value >= total) { /* 100% ? */
|
---|
402 | strcpy(pbuf, " 100% ");
|
---|
403 | return pbuf;
|
---|
404 | }
|
---|
405 | /* else generate " [N/space]N.N% " string */
|
---|
406 | value = 1000 * value / total;
|
---|
407 | t = value / 100;
|
---|
408 | value = value % 100;
|
---|
409 | pbuf[0] = ' ';
|
---|
410 | pbuf[1] = t ? t + '0' : ' ';
|
---|
411 | pbuf[2] = '0' + (value / 10);
|
---|
412 | pbuf[3] = '.';
|
---|
413 | pbuf[4] = '0' + (value % 10);
|
---|
414 | pbuf[5] = '%';
|
---|
415 | pbuf[6] = ' ';
|
---|
416 | pbuf[7] = '\0';
|
---|
417 | return pbuf;
|
---|
418 | }
|
---|
419 | #endif
|
---|
420 |
|
---|
421 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
|
---|
422 | static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
|
---|
423 | {
|
---|
424 | /*
|
---|
425 | * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
|
---|
426 | */
|
---|
427 | unsigned total_diff;
|
---|
428 | jiffy_counts_t *p_jif, *p_prev_jif;
|
---|
429 | int i;
|
---|
430 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
431 | int n_cpu_lines;
|
---|
432 | # endif
|
---|
433 |
|
---|
434 | /* using (unsigned) casts to make operations cheaper */
|
---|
435 | # define CALC_TOTAL_DIFF do { \
|
---|
436 | total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
|
---|
437 | if (total_diff == 0) total_diff = 1; \
|
---|
438 | } while (0)
|
---|
439 |
|
---|
440 | # if ENABLE_FEATURE_TOP_DECIMALS
|
---|
441 | # define CALC_STAT(xxx) char xxx[8]
|
---|
442 | # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
|
---|
443 | # define FMT "%s"
|
---|
444 | # else
|
---|
445 | # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
|
---|
446 | # define SHOW_STAT(xxx) xxx
|
---|
447 | # define FMT "%4u%% "
|
---|
448 | # endif
|
---|
449 |
|
---|
450 | # if !ENABLE_FEATURE_TOP_SMP_CPU
|
---|
451 | {
|
---|
452 | i = 1;
|
---|
453 | p_jif = &cur_jif;
|
---|
454 | p_prev_jif = &prev_jif;
|
---|
455 | # else
|
---|
456 | /* Loop thru CPU(s) */
|
---|
457 | n_cpu_lines = smp_cpu_info ? num_cpus : 1;
|
---|
458 | if (n_cpu_lines > *lines_rem_p)
|
---|
459 | n_cpu_lines = *lines_rem_p;
|
---|
460 |
|
---|
461 | for (i = 0; i < n_cpu_lines; i++) {
|
---|
462 | p_jif = &cpu_jif[i];
|
---|
463 | p_prev_jif = &cpu_prev_jif[i];
|
---|
464 | # endif
|
---|
465 | CALC_TOTAL_DIFF;
|
---|
466 |
|
---|
467 | { /* Need a block: CALC_STAT are declarations */
|
---|
468 | CALC_STAT(usr);
|
---|
469 | CALC_STAT(sys);
|
---|
470 | CALC_STAT(nic);
|
---|
471 | CALC_STAT(idle);
|
---|
472 | CALC_STAT(iowait);
|
---|
473 | CALC_STAT(irq);
|
---|
474 | CALC_STAT(softirq);
|
---|
475 | /*CALC_STAT(steal);*/
|
---|
476 |
|
---|
477 | snprintf(scrbuf, scr_width,
|
---|
478 | /* Barely fits in 79 chars when in "decimals" mode. */
|
---|
479 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
480 | "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
---|
481 | (smp_cpu_info ? utoa(i) : ""),
|
---|
482 | # else
|
---|
483 | "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
---|
484 | # endif
|
---|
485 | SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
|
---|
486 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
|
---|
487 | /*, SHOW_STAT(steal) - what is this 'steal' thing? */
|
---|
488 | /* I doubt anyone wants to know it */
|
---|
489 | );
|
---|
490 | puts(scrbuf);
|
---|
491 | }
|
---|
492 | }
|
---|
493 | # undef SHOW_STAT
|
---|
494 | # undef CALC_STAT
|
---|
495 | # undef FMT
|
---|
496 | *lines_rem_p -= i;
|
---|
497 | }
|
---|
498 | #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
|
---|
499 | # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
|
---|
500 | #endif
|
---|
501 |
|
---|
502 | static unsigned long display_header(int scr_width, int *lines_rem_p)
|
---|
503 | {
|
---|
504 | FILE *fp;
|
---|
505 | char buf[80];
|
---|
506 | char scrbuf[80];
|
---|
507 | unsigned long total, used, mfree, shared, buffers, cached;
|
---|
508 |
|
---|
509 | /* read memory info */
|
---|
510 | fp = xfopen_for_read("meminfo");
|
---|
511 |
|
---|
512 | /*
|
---|
513 | * Old kernels (such as 2.4.x) had a nice summary of memory info that
|
---|
514 | * we could parse, however this is gone entirely in 2.6. Try parsing
|
---|
515 | * the old way first, and if that fails, parse each field manually.
|
---|
516 | *
|
---|
517 | * First, we read in the first line. Old kernels will have bogus
|
---|
518 | * strings we don't care about, whereas new kernels will start right
|
---|
519 | * out with MemTotal:
|
---|
520 | * -- PFM.
|
---|
521 | */
|
---|
522 | if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
|
---|
523 | fgets(buf, sizeof(buf), fp); /* skip first line */
|
---|
524 |
|
---|
525 | fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
|
---|
526 | &total, &used, &mfree, &shared, &buffers, &cached);
|
---|
527 | /* convert to kilobytes */
|
---|
528 | used /= 1024;
|
---|
529 | mfree /= 1024;
|
---|
530 | shared /= 1024;
|
---|
531 | buffers /= 1024;
|
---|
532 | cached /= 1024;
|
---|
533 | total /= 1024;
|
---|
534 | } else {
|
---|
535 | /*
|
---|
536 | * Revert to manual parsing, which incidentally already has the
|
---|
537 | * sizes in kilobytes. This should be safe for both 2.4 and
|
---|
538 | * 2.6.
|
---|
539 | */
|
---|
540 | fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
|
---|
541 |
|
---|
542 | /*
|
---|
543 | * MemShared: is no longer present in 2.6. Report this as 0,
|
---|
544 | * to maintain consistent behavior with normal procps.
|
---|
545 | */
|
---|
546 | if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
|
---|
547 | shared = 0;
|
---|
548 |
|
---|
549 | fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
|
---|
550 | fscanf(fp, "Cached: %lu %s\n", &cached, buf);
|
---|
551 |
|
---|
552 | used = total - mfree;
|
---|
553 | }
|
---|
554 | fclose(fp);
|
---|
555 |
|
---|
556 | /* output memory info */
|
---|
557 | if (scr_width > (int)sizeof(scrbuf))
|
---|
558 | scr_width = sizeof(scrbuf);
|
---|
559 | snprintf(scrbuf, scr_width,
|
---|
560 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
---|
561 | used, mfree, shared, buffers, cached);
|
---|
562 | /* go to top & clear to the end of screen */
|
---|
563 | printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
|
---|
564 | (*lines_rem_p)--;
|
---|
565 |
|
---|
566 | /* Display CPU time split as percentage of total time
|
---|
567 | * This displays either a cumulative line or one line per CPU
|
---|
568 | */
|
---|
569 | display_cpus(scr_width, scrbuf, lines_rem_p);
|
---|
570 |
|
---|
571 | /* read load average as a string */
|
---|
572 | buf[0] = '\0';
|
---|
573 | open_read_close("loadavg", buf, sizeof(buf) - 1);
|
---|
574 | buf[sizeof(buf) - 1] = '\n';
|
---|
575 | *strchr(buf, '\n') = '\0';
|
---|
576 | snprintf(scrbuf, scr_width, "Load average: %s", buf);
|
---|
577 | puts(scrbuf);
|
---|
578 | (*lines_rem_p)--;
|
---|
579 |
|
---|
580 | return total;
|
---|
581 | }
|
---|
582 |
|
---|
583 | static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
---|
584 | {
|
---|
585 | enum {
|
---|
586 | BITS_PER_INT = sizeof(int) * 8
|
---|
587 | };
|
---|
588 |
|
---|
589 | top_status_t *s;
|
---|
590 | char vsz_str_buf[8];
|
---|
591 | unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
|
---|
592 | /* xxx_shift and xxx_scale variables allow us to replace
|
---|
593 | * expensive divides with multiply and shift */
|
---|
594 | unsigned pmem_shift, pmem_scale, pmem_half;
|
---|
595 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
596 | unsigned tmp_unsigned;
|
---|
597 | unsigned pcpu_shift, pcpu_scale, pcpu_half;
|
---|
598 | unsigned busy_jifs;
|
---|
599 | #endif
|
---|
600 |
|
---|
601 | /* what info of the processes is shown */
|
---|
602 | printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
|
---|
603 | " PID PPID USER STAT VSZ %VSZ"
|
---|
604 | IF_FEATURE_TOP_SMP_PROCESS(" CPU")
|
---|
605 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
|
---|
606 | " COMMAND");
|
---|
607 | lines_rem--;
|
---|
608 |
|
---|
609 | #if ENABLE_FEATURE_TOP_DECIMALS
|
---|
610 | # define UPSCALE 1000
|
---|
611 | # define CALC_STAT(name, val) div_t name = div((val), 10)
|
---|
612 | # define SHOW_STAT(name) name.quot, '0'+name.rem
|
---|
613 | # define FMT "%3u.%c"
|
---|
614 | #else
|
---|
615 | # define UPSCALE 100
|
---|
616 | # define CALC_STAT(name, val) unsigned name = (val)
|
---|
617 | # define SHOW_STAT(name) name
|
---|
618 | # define FMT "%4u%%"
|
---|
619 | #endif
|
---|
620 | /*
|
---|
621 | * %VSZ = s->vsz/MemTotal
|
---|
622 | */
|
---|
623 | pmem_shift = BITS_PER_INT-11;
|
---|
624 | pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
|
---|
625 | /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
|
---|
626 | while (pmem_scale >= 512) {
|
---|
627 | pmem_scale /= 4;
|
---|
628 | pmem_shift -= 2;
|
---|
629 | }
|
---|
630 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
631 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
632 | busy_jifs = cur_jif.busy - prev_jif.busy;
|
---|
633 | /* This happens if there were lots of short-lived processes
|
---|
634 | * between two top updates (e.g. compilation) */
|
---|
635 | if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
|
---|
636 |
|
---|
637 | /*
|
---|
638 | * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
|
---|
639 | * (pcpu is delta of sys+user time between samples)
|
---|
640 | */
|
---|
641 | /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
|
---|
642 | * in 0..~64000 range (HZ*update_interval).
|
---|
643 | * we assume that unsigned is at least 32-bit.
|
---|
644 | */
|
---|
645 | pcpu_shift = 6;
|
---|
646 | pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
|
---|
647 | if (pcpu_scale == 0)
|
---|
648 | pcpu_scale = 1;
|
---|
649 | while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
|
---|
650 | pcpu_scale *= 4;
|
---|
651 | pcpu_shift += 2;
|
---|
652 | }
|
---|
653 | tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
|
---|
654 | if (tmp_unsigned != 0)
|
---|
655 | pcpu_scale /= tmp_unsigned;
|
---|
656 | /* we want (s->pcpu * pcpu_scale) to never overflow */
|
---|
657 | while (pcpu_scale >= 1024) {
|
---|
658 | pcpu_scale /= 4;
|
---|
659 | pcpu_shift -= 2;
|
---|
660 | }
|
---|
661 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
662 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
---|
663 | #endif
|
---|
664 |
|
---|
665 | /* Ok, all preliminary data is ready, go through the list */
|
---|
666 | scr_width += 2; /* account for leading '\n' and trailing NUL */
|
---|
667 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
668 | lines_rem = ntop - G_scroll_ofs;
|
---|
669 | s = top + G_scroll_ofs;
|
---|
670 | while (--lines_rem >= 0) {
|
---|
671 | unsigned col;
|
---|
672 | CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
|
---|
673 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
674 | CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
|
---|
675 | #endif
|
---|
676 |
|
---|
677 | if (s->vsz >= 100000)
|
---|
678 | sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
|
---|
679 | else
|
---|
680 | sprintf(vsz_str_buf, "%7ld", s->vsz);
|
---|
681 | /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
|
---|
682 | col = snprintf(line_buf, scr_width,
|
---|
683 | "\n" "%5u%6u %-8.8s %s%s" FMT
|
---|
684 | IF_FEATURE_TOP_SMP_PROCESS(" %3d")
|
---|
685 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
|
---|
686 | " ",
|
---|
687 | s->pid, s->ppid, get_cached_username(s->uid),
|
---|
688 | s->state, vsz_str_buf,
|
---|
689 | SHOW_STAT(pmem)
|
---|
690 | IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
|
---|
691 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
|
---|
692 | );
|
---|
693 | if ((int)(col + 1) < scr_width)
|
---|
694 | read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
|
---|
695 | fputs(line_buf, stdout);
|
---|
696 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
---|
697 | cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
---|
698 | s++;
|
---|
699 | }
|
---|
700 | /* printf(" %d", hist_iterations); */
|
---|
701 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
702 | fflush_all();
|
---|
703 | }
|
---|
704 | #undef UPSCALE
|
---|
705 | #undef SHOW_STAT
|
---|
706 | #undef CALC_STAT
|
---|
707 | #undef FMT
|
---|
708 |
|
---|
709 | static void clearmems(void)
|
---|
710 | {
|
---|
711 | clear_username_cache();
|
---|
712 | free(top);
|
---|
713 | top = NULL;
|
---|
714 | }
|
---|
715 |
|
---|
716 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
717 |
|
---|
718 | static void reset_term(void)
|
---|
719 | {
|
---|
720 | if (!OPT_BATCH_MODE)
|
---|
721 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
722 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
723 | clearmems();
|
---|
724 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
725 | free(prev_hist);
|
---|
726 | # endif
|
---|
727 | }
|
---|
728 | }
|
---|
729 |
|
---|
730 | static void sig_catcher(int sig)
|
---|
731 | {
|
---|
732 | reset_term();
|
---|
733 | kill_myself_with_sig(sig);
|
---|
734 | }
|
---|
735 |
|
---|
736 | #endif /* FEATURE_USE_TERMIOS */
|
---|
737 |
|
---|
738 | /*
|
---|
739 | * TOPMEM support
|
---|
740 | */
|
---|
741 |
|
---|
742 | typedef unsigned long mem_t;
|
---|
743 |
|
---|
744 | typedef struct topmem_status_t {
|
---|
745 | unsigned pid;
|
---|
746 | char comm[COMM_LEN];
|
---|
747 | /* vsz doesn't count /dev/xxx mappings except /dev/zero */
|
---|
748 | mem_t vsz ;
|
---|
749 | mem_t vszrw ;
|
---|
750 | mem_t rss ;
|
---|
751 | mem_t rss_sh ;
|
---|
752 | mem_t dirty ;
|
---|
753 | mem_t dirty_sh;
|
---|
754 | mem_t stack ;
|
---|
755 | } topmem_status_t;
|
---|
756 |
|
---|
757 | enum { NUM_SORT_FIELD = 7 };
|
---|
758 |
|
---|
759 | #define topmem ((topmem_status_t*)top)
|
---|
760 |
|
---|
761 | #if ENABLE_FEATURE_TOPMEM
|
---|
762 |
|
---|
763 | static int topmem_sort(char *a, char *b)
|
---|
764 | {
|
---|
765 | int n;
|
---|
766 | mem_t l, r;
|
---|
767 |
|
---|
768 | n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
|
---|
769 | l = *(mem_t*)(a + n);
|
---|
770 | r = *(mem_t*)(b + n);
|
---|
771 | if (l == r) {
|
---|
772 | l = ((topmem_status_t*)a)->dirty;
|
---|
773 | r = ((topmem_status_t*)b)->dirty;
|
---|
774 | }
|
---|
775 | /* We want to avoid unsigned->signed and truncation errors */
|
---|
776 | /* l>r: -1, l=r: 0, l<r: 1 */
|
---|
777 | n = (l > r) ? -1 : (l != r);
|
---|
778 | return inverted ? -n : n;
|
---|
779 | }
|
---|
780 |
|
---|
781 | /* display header info (meminfo / loadavg) */
|
---|
782 | static void display_topmem_header(int scr_width, int *lines_rem_p)
|
---|
783 | {
|
---|
784 | enum {
|
---|
785 | TOTAL = 0, MFREE, BUF, CACHE,
|
---|
786 | SWAPTOTAL, SWAPFREE, DIRTY,
|
---|
787 | MWRITE, ANON, MAP, SLAB,
|
---|
788 | NUM_FIELDS
|
---|
789 | };
|
---|
790 | static const char match[NUM_FIELDS][12] = {
|
---|
791 | "\x09" "MemTotal:", // TOTAL
|
---|
792 | "\x08" "MemFree:", // MFREE
|
---|
793 | "\x08" "Buffers:", // BUF
|
---|
794 | "\x07" "Cached:", // CACHE
|
---|
795 | "\x0a" "SwapTotal:", // SWAPTOTAL
|
---|
796 | "\x09" "SwapFree:", // SWAPFREE
|
---|
797 | "\x06" "Dirty:", // DIRTY
|
---|
798 | "\x0a" "Writeback:", // MWRITE
|
---|
799 | "\x0a" "AnonPages:", // ANON
|
---|
800 | "\x07" "Mapped:", // MAP
|
---|
801 | "\x05" "Slab:", // SLAB
|
---|
802 | };
|
---|
803 | char meminfo_buf[4 * 1024];
|
---|
804 | const char *Z[NUM_FIELDS];
|
---|
805 | unsigned i;
|
---|
806 | int sz;
|
---|
807 |
|
---|
808 | for (i = 0; i < NUM_FIELDS; i++)
|
---|
809 | Z[i] = "?";
|
---|
810 |
|
---|
811 | /* read memory info */
|
---|
812 | sz = open_read_close("meminfo", meminfo_buf, sizeof(meminfo_buf) - 1);
|
---|
813 | if (sz >= 0) {
|
---|
814 | char *p = meminfo_buf;
|
---|
815 | meminfo_buf[sz] = '\0';
|
---|
816 | /* Note that fields always appear in the match[] order */
|
---|
817 | for (i = 0; i < NUM_FIELDS; i++) {
|
---|
818 | char *found = strstr(p, match[i] + 1);
|
---|
819 | if (found) {
|
---|
820 | /* Cut "NNNN" out of " NNNN kb" */
|
---|
821 | char *s = skip_whitespace(found + match[i][0]);
|
---|
822 | p = skip_non_whitespace(s);
|
---|
823 | *p++ = '\0';
|
---|
824 | Z[i] = s;
|
---|
825 | }
|
---|
826 | }
|
---|
827 | }
|
---|
828 |
|
---|
829 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
830 | "Mem total:%s anon:%s map:%s free:%s",
|
---|
831 | Z[TOTAL], Z[ANON], Z[MAP], Z[MFREE]);
|
---|
832 | printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
|
---|
833 |
|
---|
834 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
835 | " slab:%s buf:%s cache:%s dirty:%s write:%s",
|
---|
836 | Z[SLAB], Z[BUF], Z[CACHE], Z[DIRTY], Z[MWRITE]);
|
---|
837 | printf("%.*s\n", scr_width, line_buf);
|
---|
838 |
|
---|
839 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
840 | "Swap total:%s free:%s", // TODO: % used?
|
---|
841 | Z[SWAPTOTAL], Z[SWAPFREE]);
|
---|
842 | printf("%.*s\n", scr_width, line_buf);
|
---|
843 |
|
---|
844 | (*lines_rem_p) -= 3;
|
---|
845 | }
|
---|
846 |
|
---|
847 | static void ulltoa6_and_space(unsigned long long ul, char buf[6])
|
---|
848 | {
|
---|
849 | /* see http://en.wikipedia.org/wiki/Tera */
|
---|
850 | smart_ulltoa5(ul, buf, " mgtpezy");
|
---|
851 | buf[5] = ' ';
|
---|
852 | }
|
---|
853 |
|
---|
854 | static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
|
---|
855 | {
|
---|
856 | #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
|
---|
857 | #define MIN_WIDTH sizeof(HDR_STR)
|
---|
858 | const topmem_status_t *s = topmem + G_scroll_ofs;
|
---|
859 |
|
---|
860 | display_topmem_header(scr_width, &lines_rem);
|
---|
861 | strcpy(line_buf, HDR_STR " COMMAND");
|
---|
862 | line_buf[11 + sort_field * 6] = "^_"[inverted];
|
---|
863 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
---|
864 | lines_rem--;
|
---|
865 |
|
---|
866 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
867 | lines_rem = ntop - G_scroll_ofs;
|
---|
868 | while (--lines_rem >= 0) {
|
---|
869 | /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
|
---|
870 | ulltoa6_and_space(s->pid , &line_buf[0*6]);
|
---|
871 | ulltoa6_and_space(s->vsz , &line_buf[1*6]);
|
---|
872 | ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
|
---|
873 | ulltoa6_and_space(s->rss , &line_buf[3*6]);
|
---|
874 | ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
|
---|
875 | ulltoa6_and_space(s->dirty , &line_buf[5*6]);
|
---|
876 | ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
|
---|
877 | ulltoa6_and_space(s->stack , &line_buf[7*6]);
|
---|
878 | line_buf[8*6] = '\0';
|
---|
879 | if (scr_width > (int)MIN_WIDTH) {
|
---|
880 | read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
|
---|
881 | }
|
---|
882 | printf("\n""%.*s", scr_width, line_buf);
|
---|
883 | s++;
|
---|
884 | }
|
---|
885 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
886 | fflush_all();
|
---|
887 | #undef HDR_STR
|
---|
888 | #undef MIN_WIDTH
|
---|
889 | }
|
---|
890 |
|
---|
891 | #else
|
---|
892 | void display_topmem_process_list(int lines_rem, int scr_width);
|
---|
893 | int topmem_sort(char *a, char *b);
|
---|
894 | #endif /* TOPMEM */
|
---|
895 |
|
---|
896 | /*
|
---|
897 | * end TOPMEM support
|
---|
898 | */
|
---|
899 |
|
---|
900 | enum {
|
---|
901 | TOP_MASK = 0
|
---|
902 | | PSSCAN_PID
|
---|
903 | | PSSCAN_PPID
|
---|
904 | | PSSCAN_VSZ
|
---|
905 | | PSSCAN_STIME
|
---|
906 | | PSSCAN_UTIME
|
---|
907 | | PSSCAN_STATE
|
---|
908 | | PSSCAN_COMM
|
---|
909 | | PSSCAN_CPU
|
---|
910 | | PSSCAN_UIDGID,
|
---|
911 | TOPMEM_MASK = 0
|
---|
912 | | PSSCAN_PID
|
---|
913 | | PSSCAN_SMAPS
|
---|
914 | | PSSCAN_COMM,
|
---|
915 | EXIT_MASK = (unsigned)-1,
|
---|
916 | };
|
---|
917 |
|
---|
918 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
919 | static unsigned handle_input(unsigned scan_mask, unsigned interval)
|
---|
920 | {
|
---|
921 | struct pollfd pfd[1];
|
---|
922 |
|
---|
923 | if (option_mask32 & OPT_EOF) {
|
---|
924 | /* EOF on stdin ("top </dev/null") */
|
---|
925 | sleep(interval);
|
---|
926 | return scan_mask;
|
---|
927 | }
|
---|
928 |
|
---|
929 | pfd[0].fd = 0;
|
---|
930 | pfd[0].events = POLLIN;
|
---|
931 |
|
---|
932 | while (1) {
|
---|
933 | int32_t c;
|
---|
934 |
|
---|
935 | c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
|
---|
936 | if (c == -1 && errno != EAGAIN) {
|
---|
937 | /* error/EOF */
|
---|
938 | option_mask32 |= OPT_EOF;
|
---|
939 | break;
|
---|
940 | }
|
---|
941 | interval = 0;
|
---|
942 |
|
---|
943 | if (c == initial_settings.c_cc[VINTR])
|
---|
944 | return EXIT_MASK;
|
---|
945 | if (c == initial_settings.c_cc[VEOF])
|
---|
946 | return EXIT_MASK;
|
---|
947 |
|
---|
948 | if (c == KEYCODE_UP) {
|
---|
949 | G_scroll_ofs--;
|
---|
950 | goto normalize_ofs;
|
---|
951 | }
|
---|
952 | if (c == KEYCODE_DOWN) {
|
---|
953 | G_scroll_ofs++;
|
---|
954 | goto normalize_ofs;
|
---|
955 | }
|
---|
956 | if (c == KEYCODE_HOME) {
|
---|
957 | G_scroll_ofs = 0;
|
---|
958 | break;
|
---|
959 | }
|
---|
960 | if (c == KEYCODE_END) {
|
---|
961 | G_scroll_ofs = ntop - G.lines / 2;
|
---|
962 | goto normalize_ofs;
|
---|
963 | }
|
---|
964 | if (c == KEYCODE_PAGEUP) {
|
---|
965 | G_scroll_ofs -= G.lines / 2;
|
---|
966 | goto normalize_ofs;
|
---|
967 | }
|
---|
968 | if (c == KEYCODE_PAGEDOWN) {
|
---|
969 | G_scroll_ofs += G.lines / 2;
|
---|
970 | normalize_ofs:
|
---|
971 | if (G_scroll_ofs >= ntop)
|
---|
972 | G_scroll_ofs = ntop - 1;
|
---|
973 | if (G_scroll_ofs < 0)
|
---|
974 | G_scroll_ofs = 0;
|
---|
975 | break;
|
---|
976 | }
|
---|
977 |
|
---|
978 | c |= 0x20; /* lowercase */
|
---|
979 | if (c == 'q')
|
---|
980 | return EXIT_MASK;
|
---|
981 |
|
---|
982 | if (c == 'n') {
|
---|
983 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
984 | sort_function[0] = pid_sort;
|
---|
985 | continue;
|
---|
986 | }
|
---|
987 | if (c == 'm') {
|
---|
988 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
989 | sort_function[0] = mem_sort;
|
---|
990 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
991 | sort_function[1] = pcpu_sort;
|
---|
992 | sort_function[2] = time_sort;
|
---|
993 | # endif
|
---|
994 | continue;
|
---|
995 | }
|
---|
996 | # if ENABLE_FEATURE_SHOW_THREADS
|
---|
997 | if (c == 'h'
|
---|
998 | IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
|
---|
999 | ) {
|
---|
1000 | scan_mask ^= PSSCAN_TASKS;
|
---|
1001 | continue;
|
---|
1002 | }
|
---|
1003 | # endif
|
---|
1004 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1005 | if (c == 'p') {
|
---|
1006 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
1007 | sort_function[0] = pcpu_sort;
|
---|
1008 | sort_function[1] = mem_sort;
|
---|
1009 | sort_function[2] = time_sort;
|
---|
1010 | continue;
|
---|
1011 | }
|
---|
1012 | if (c == 't') {
|
---|
1013 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
1014 | sort_function[0] = time_sort;
|
---|
1015 | sort_function[1] = mem_sort;
|
---|
1016 | sort_function[2] = pcpu_sort;
|
---|
1017 | continue;
|
---|
1018 | }
|
---|
1019 | # if ENABLE_FEATURE_TOPMEM
|
---|
1020 | if (c == 's') {
|
---|
1021 | scan_mask = TOPMEM_MASK;
|
---|
1022 | free(prev_hist);
|
---|
1023 | prev_hist = NULL;
|
---|
1024 | prev_hist_count = 0;
|
---|
1025 | sort_field = (sort_field + 1) % NUM_SORT_FIELD;
|
---|
1026 | continue;
|
---|
1027 | }
|
---|
1028 | # endif
|
---|
1029 | if (c == 'r') {
|
---|
1030 | inverted ^= 1;
|
---|
1031 | continue;
|
---|
1032 | }
|
---|
1033 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1034 | /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
|
---|
1035 | if (c == 'c' || c == '1') {
|
---|
1036 | /* User wants to toggle per cpu <> aggregate */
|
---|
1037 | if (smp_cpu_info) {
|
---|
1038 | free(cpu_prev_jif);
|
---|
1039 | free(cpu_jif);
|
---|
1040 | cpu_jif = &cur_jif;
|
---|
1041 | cpu_prev_jif = &prev_jif;
|
---|
1042 | } else {
|
---|
1043 | /* Prepare for xrealloc() */
|
---|
1044 | cpu_jif = cpu_prev_jif = NULL;
|
---|
1045 | }
|
---|
1046 | num_cpus = 0;
|
---|
1047 | smp_cpu_info = !smp_cpu_info;
|
---|
1048 | get_jiffy_counts();
|
---|
1049 | continue;
|
---|
1050 | }
|
---|
1051 | # endif
|
---|
1052 | # endif
|
---|
1053 | break; /* unknown key -> force refresh */
|
---|
1054 | }
|
---|
1055 |
|
---|
1056 | return scan_mask;
|
---|
1057 | }
|
---|
1058 | #endif
|
---|
1059 |
|
---|
1060 | //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1061 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
|
---|
1062 | //usage:#else
|
---|
1063 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
|
---|
1064 | //usage:#endif
|
---|
1065 | //usage:#define top_trivial_usage
|
---|
1066 | //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
|
---|
1067 | //usage:#define top_full_usage "\n\n"
|
---|
1068 | //usage: "Provide a view of process activity in real time."
|
---|
1069 | //usage: "\n""Read the status of all processes from /proc each SECONDS"
|
---|
1070 | //usage: "\n""and display a screenful of them."
|
---|
1071 | //usage: "\n""Keys:"
|
---|
1072 | //usage: "\n"" N/M"
|
---|
1073 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
|
---|
1074 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
|
---|
1075 | //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
|
---|
1076 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
|
---|
1077 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
|
---|
1078 | //usage: IF_FEATURE_TOPMEM(
|
---|
1079 | //usage: "\n"" S: show memory"
|
---|
1080 | //usage: )
|
---|
1081 | //usage: "\n"" R: reverse sort"
|
---|
1082 | //usage: IF_SHOW_THREADS_OR_TOP_SMP(
|
---|
1083 | //usage: "\n"" "
|
---|
1084 | //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
|
---|
1085 | //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
|
---|
1086 | //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
|
---|
1087 | //usage: )
|
---|
1088 | //usage: "\n"" Q,^C: exit"
|
---|
1089 | //usage: "\n"
|
---|
1090 | //usage: "\n""Options:"
|
---|
1091 | //usage: "\n"" -b Batch mode"
|
---|
1092 | //usage: "\n"" -n N Exit after N iterations"
|
---|
1093 | //usage: "\n"" -d N Delay between updates"
|
---|
1094 | //usage: IF_FEATURE_TOPMEM(
|
---|
1095 | //usage: "\n"" -m Same as 's' key"
|
---|
1096 | //usage: )
|
---|
1097 |
|
---|
1098 | /* Interactive testing:
|
---|
1099 | * echo sss | ./busybox top
|
---|
1100 | * - shows memory screen
|
---|
1101 | * echo sss | ./busybox top -bn1 >mem
|
---|
1102 | * - saves memory screen - the *whole* list, not first NROWS processes!
|
---|
1103 | * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
|
---|
1104 | * - saves several different screens, and exits
|
---|
1105 | *
|
---|
1106 | * TODO: -i STRING param as a better alternative?
|
---|
1107 | */
|
---|
1108 |
|
---|
1109 | int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1110 | int top_main(int argc UNUSED_PARAM, char **argv)
|
---|
1111 | {
|
---|
1112 | int iterations;
|
---|
1113 | unsigned col;
|
---|
1114 | unsigned interval;
|
---|
1115 | char *str_interval, *str_iterations;
|
---|
1116 | unsigned scan_mask = TOP_MASK;
|
---|
1117 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1118 | struct termios new_settings;
|
---|
1119 | #endif
|
---|
1120 |
|
---|
1121 | INIT_G();
|
---|
1122 |
|
---|
1123 | interval = 5; /* default update interval is 5 seconds */
|
---|
1124 | iterations = 0; /* infinite */
|
---|
1125 | #if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1126 | /*num_cpus = 0;*/
|
---|
1127 | /*smp_cpu_info = 0;*/ /* to start with show aggregate */
|
---|
1128 | cpu_jif = &cur_jif;
|
---|
1129 | cpu_prev_jif = &prev_jif;
|
---|
1130 | #endif
|
---|
1131 |
|
---|
1132 | /* all args are options; -n NUM */
|
---|
1133 | opt_complementary = "-"; /* options can be specified w/o dash */
|
---|
1134 | col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
|
---|
1135 | #if ENABLE_FEATURE_TOPMEM
|
---|
1136 | if (col & OPT_m) /* -m (busybox specific) */
|
---|
1137 | scan_mask = TOPMEM_MASK;
|
---|
1138 | #endif
|
---|
1139 | if (col & OPT_d) {
|
---|
1140 | /* work around for "-d 1" -> "-d -1" done by getopt32
|
---|
1141 | * (opt_complementary == "-" does this) */
|
---|
1142 | if (str_interval[0] == '-')
|
---|
1143 | str_interval++;
|
---|
1144 | /* Need to limit it to not overflow poll timeout */
|
---|
1145 | interval = xatou16(str_interval);
|
---|
1146 | }
|
---|
1147 | if (col & OPT_n) {
|
---|
1148 | if (str_iterations[0] == '-')
|
---|
1149 | str_iterations++;
|
---|
1150 | iterations = xatou(str_iterations);
|
---|
1151 | }
|
---|
1152 |
|
---|
1153 | /* change to /proc */
|
---|
1154 | xchdir("/proc");
|
---|
1155 |
|
---|
1156 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1157 | sort_function[0] = pcpu_sort;
|
---|
1158 | sort_function[1] = mem_sort;
|
---|
1159 | sort_function[2] = time_sort;
|
---|
1160 | #else
|
---|
1161 | sort_function[0] = mem_sort;
|
---|
1162 | #endif
|
---|
1163 |
|
---|
1164 | if (OPT_BATCH_MODE) {
|
---|
1165 | option_mask32 |= OPT_EOF;
|
---|
1166 | }
|
---|
1167 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1168 | else {
|
---|
1169 | tcgetattr(0, (void *) &initial_settings);
|
---|
1170 | memcpy(&new_settings, &initial_settings, sizeof(new_settings));
|
---|
1171 | /* unbuffered input, turn off echo */
|
---|
1172 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
---|
1173 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
1174 | }
|
---|
1175 |
|
---|
1176 | bb_signals(BB_FATAL_SIGS, sig_catcher);
|
---|
1177 |
|
---|
1178 | /* Eat initial input, if any */
|
---|
1179 | scan_mask = handle_input(scan_mask, 0);
|
---|
1180 | #endif
|
---|
1181 |
|
---|
1182 | while (scan_mask != EXIT_MASK) {
|
---|
1183 | procps_status_t *p = NULL;
|
---|
1184 |
|
---|
1185 | if (OPT_BATCH_MODE) {
|
---|
1186 | G.lines = INT_MAX;
|
---|
1187 | col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
|
---|
1188 | } else {
|
---|
1189 | G.lines = 24; /* default */
|
---|
1190 | col = 79;
|
---|
1191 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1192 | /* We output to stdout, we need size of stdout (not stdin)! */
|
---|
1193 | get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
|
---|
1194 | if (G.lines < 5 || col < 10) {
|
---|
1195 | sleep(interval);
|
---|
1196 | continue;
|
---|
1197 | }
|
---|
1198 | #endif
|
---|
1199 | if (col > LINE_BUF_SIZE - 2)
|
---|
1200 | col = LINE_BUF_SIZE - 2;
|
---|
1201 | }
|
---|
1202 |
|
---|
1203 | /* read process IDs & status for all the processes */
|
---|
1204 | ntop = 0;
|
---|
1205 | while ((p = procps_scan(p, scan_mask)) != NULL) {
|
---|
1206 | int n;
|
---|
1207 | #if ENABLE_FEATURE_TOPMEM
|
---|
1208 | if (scan_mask != TOPMEM_MASK)
|
---|
1209 | #endif
|
---|
1210 | {
|
---|
1211 | n = ntop;
|
---|
1212 | top = xrealloc_vector(top, 6, ntop++);
|
---|
1213 | top[n].pid = p->pid;
|
---|
1214 | top[n].ppid = p->ppid;
|
---|
1215 | top[n].vsz = p->vsz;
|
---|
1216 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1217 | top[n].ticks = p->stime + p->utime;
|
---|
1218 | #endif
|
---|
1219 | top[n].uid = p->uid;
|
---|
1220 | strcpy(top[n].state, p->state);
|
---|
1221 | strcpy(top[n].comm, p->comm);
|
---|
1222 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
|
---|
1223 | top[n].last_seen_on_cpu = p->last_seen_on_cpu;
|
---|
1224 | #endif
|
---|
1225 | }
|
---|
1226 | #if ENABLE_FEATURE_TOPMEM
|
---|
1227 | else { /* TOPMEM */
|
---|
1228 | if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
|
---|
1229 | continue; /* kernel threads are ignored */
|
---|
1230 | n = ntop;
|
---|
1231 | /* No bug here - top and topmem are the same */
|
---|
1232 | top = xrealloc_vector(topmem, 6, ntop++);
|
---|
1233 | strcpy(topmem[n].comm, p->comm);
|
---|
1234 | topmem[n].pid = p->pid;
|
---|
1235 | topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
|
---|
1236 | topmem[n].vszrw = p->smaps.mapped_rw;
|
---|
1237 | topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
|
---|
1238 | topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
|
---|
1239 | topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
|
---|
1240 | topmem[n].dirty_sh = p->smaps.shared_dirty;
|
---|
1241 | topmem[n].stack = p->smaps.stack;
|
---|
1242 | }
|
---|
1243 | #endif
|
---|
1244 | } /* end of "while we read /proc" */
|
---|
1245 | if (ntop == 0) {
|
---|
1246 | bb_error_msg("no process info in /proc");
|
---|
1247 | break;
|
---|
1248 | }
|
---|
1249 |
|
---|
1250 | if (scan_mask != TOPMEM_MASK) {
|
---|
1251 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1252 | if (!prev_hist_count) {
|
---|
1253 | do_stats();
|
---|
1254 | usleep(100000);
|
---|
1255 | clearmems();
|
---|
1256 | continue;
|
---|
1257 | }
|
---|
1258 | do_stats();
|
---|
1259 | /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
---|
1260 | qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
---|
1261 | #else
|
---|
1262 | qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
---|
1263 | #endif
|
---|
1264 | }
|
---|
1265 | #if ENABLE_FEATURE_TOPMEM
|
---|
1266 | else { /* TOPMEM */
|
---|
1267 | qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
---|
1268 | }
|
---|
1269 | #endif
|
---|
1270 | if (scan_mask != TOPMEM_MASK)
|
---|
1271 | display_process_list(G.lines, col);
|
---|
1272 | #if ENABLE_FEATURE_TOPMEM
|
---|
1273 | else
|
---|
1274 | display_topmem_process_list(G.lines, col);
|
---|
1275 | #endif
|
---|
1276 | clearmems();
|
---|
1277 | if (iterations >= 0 && !--iterations)
|
---|
1278 | break;
|
---|
1279 | #if !ENABLE_FEATURE_USE_TERMIOS
|
---|
1280 | sleep(interval);
|
---|
1281 | #else
|
---|
1282 | scan_mask = handle_input(scan_mask, interval);
|
---|
1283 | #endif /* FEATURE_USE_TERMIOS */
|
---|
1284 | } /* end of "while (not Q)" */
|
---|
1285 |
|
---|
1286 | bb_putchar('\n');
|
---|
1287 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1288 | reset_term();
|
---|
1289 | #endif
|
---|
1290 | return EXIT_SUCCESS;
|
---|
1291 | }
|
---|