1 /* vi: set sw=4 ts=4: */
3 * A tiny 'top' utility.
5 * This is written specifically for the linux /proc/<PID>/stat(m)
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
13 * - At startup this changes to /proc, all the reads are then
16 * (C) Eero Tamminen <oak at welho dot com>
18 * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
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
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
31 * Licensed under GPLv2, see file LICENSE in this source tree.
33 /* How to snapshot /proc for debugging top problems:
34 * for f in /proc/[0-9]*""/stat; do
39 * cp /proc/stat /proc/meminfo /proc/loadavg .
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
49 * cp stat meminfo loadavg proc
50 * chroot . ./top -bn1 >top1.out
57 //config: The top program provides a dynamic real-time view of a running
60 //config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
61 //config: bool "Show CPU per-process usage percentage"
63 //config: depends on TOP
65 //config: Make top display CPU usage for each process.
66 //config: This adds about 2k.
68 //config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
69 //config: bool "Show CPU global usage percentage"
71 //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
73 //config: Makes top display "CPU: NN% usr NN% sys..." line.
74 //config: This adds about 0.5k.
76 //config:config FEATURE_TOP_SMP_CPU
77 //config: bool "SMP CPU usage display ('c' key)"
79 //config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
81 //config: Allow 'c' key to switch between individual/cumulative CPU stats
82 //config: This adds about 0.5k.
84 //config:config FEATURE_TOP_DECIMALS
85 //config: bool "Show 1/10th of a percent in CPU/mem statistics"
87 //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
89 //config: Show 1/10th of a percent in CPU/mem statistics.
90 //config: This adds about 0.3k.
92 //config:config FEATURE_TOP_SMP_PROCESS
93 //config: bool "Show CPU process runs on ('j' field)"
95 //config: depends on TOP
97 //config: Show CPU where process was last found running on.
98 //config: This is the 'j' field.
100 //config:config FEATURE_TOPMEM
101 //config: bool "Topmem command ('s' key)"
103 //config: depends on TOP
105 //config: Enable 's' in top (gives lots of memory info).
108 #include "common_bufsiz.h"
111 typedef struct top_status_t {
113 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
115 unsigned pcpu; /* delta of ticks */
121 #if ENABLE_FEATURE_TOP_SMP_PROCESS
122 int last_seen_on_cpu;
126 typedef struct jiffy_counts_t {
127 /* Linux 2.4.x has only first four */
128 unsigned long long usr, nic, sys, idle;
129 unsigned long long iowait, irq, softirq, steal;
130 unsigned long long total;
131 unsigned long long busy;
134 /* This structure stores some critical information from one frame to
135 the next. Used for finding deltas. */
136 typedef struct save_hist {
141 typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
144 enum { SORT_DEPTH = 3 };
151 #if ENABLE_FEATURE_TOPMEM
154 #if ENABLE_FEATURE_TOP_SMP_CPU
155 smallint smp_cpu_info; /* one/many cpu info lines? */
157 unsigned lines; /* screen height */
158 #if ENABLE_FEATURE_USE_TERMIOS
159 struct termios initial_settings;
161 #define G_scroll_ofs G.scroll_ofs
163 #define G_scroll_ofs 0
165 #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
166 cmp_funcp sort_function[1];
168 cmp_funcp sort_function[SORT_DEPTH];
169 struct save_hist *prev_hist;
171 jiffy_counts_t cur_jif, prev_jif;
172 /* int hist_iterations; */
174 /* unsigned long total_vsz; */
176 #if ENABLE_FEATURE_TOP_SMP_CPU
177 /* Per CPU samples: current and last */
178 jiffy_counts_t *cpu_jif, *cpu_prev_jif;
181 #if ENABLE_FEATURE_USE_TERMIOS
182 char kbd_input[KEYCODE_BUFFER_SIZE];
185 }; //FIX_ALIASING; - large code growth
186 enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
187 #define G (*(struct globals*)bb_common_bufsiz1)
189 #define ntop (G.ntop )
190 #define sort_field (G.sort_field )
191 #define inverted (G.inverted )
192 #define smp_cpu_info (G.smp_cpu_info )
193 #define initial_settings (G.initial_settings )
194 #define sort_function (G.sort_function )
195 #define prev_hist (G.prev_hist )
196 #define prev_hist_count (G.prev_hist_count )
197 #define cur_jif (G.cur_jif )
198 #define prev_jif (G.prev_jif )
199 #define cpu_jif (G.cpu_jif )
200 #define cpu_prev_jif (G.cpu_prev_jif )
201 #define num_cpus (G.num_cpus )
202 #define total_pcpu (G.total_pcpu )
203 #define line_buf (G.line_buf )
204 #define INIT_G() do { \
205 setup_common_bufsiz(); \
206 BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
207 BUILD_BUG_ON(LINE_BUF_SIZE <= 80); \
215 OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
217 #define OPT_BATCH_MODE (option_mask32 & OPT_b)
220 #if ENABLE_FEATURE_USE_TERMIOS
221 static int pid_sort(top_status_t *P, top_status_t *Q)
223 /* Buggy wrt pids with high bit set */
224 /* (linux pids are in [1..2^15-1]) */
225 return (Q->pid - P->pid);
229 static int mem_sort(top_status_t *P, top_status_t *Q)
231 /* We want to avoid unsigned->signed and truncation errors */
232 if (Q->vsz < P->vsz) return -1;
233 return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
237 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
239 static int pcpu_sort(top_status_t *P, top_status_t *Q)
241 /* Buggy wrt ticks with high bit set */
242 /* Affects only processes for which ticks overflow */
243 return (int)Q->pcpu - (int)P->pcpu;
246 static int time_sort(top_status_t *P, top_status_t *Q)
248 /* We want to avoid unsigned->signed and truncation errors */
249 if (Q->ticks < P->ticks) return -1;
250 return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
253 static int mult_lvl_cmp(void* a, void* b)
257 for (i = 0; i < SORT_DEPTH; i++) {
258 cmp_val = (*sort_function[i])(a, b);
262 return inverted ? -cmp_val : cmp_val;
265 static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
267 #if !ENABLE_FEATURE_TOP_SMP_CPU
268 static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
270 static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
274 if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
276 ret = sscanf(line_buf, fmt,
277 &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
278 &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
281 p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
282 + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
283 /* procps 2.x does not count iowait as busy time */
284 p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
290 static void get_jiffy_counts(void)
292 FILE* fp = xfopen_for_read("stat");
294 /* We need to parse cumulative counts even if SMP CPU display is on,
295 * they are used to calculate per process CPU% */
297 if (read_cpu_jiffy(fp, &cur_jif) < 4)
298 bb_error_msg_and_die("can't read '%s'", "/proc/stat");
300 #if !ENABLE_FEATURE_TOP_SMP_CPU
310 /* First time here. How many CPUs?
311 * There will be at least 1 /proc/stat line with cpu%d
314 cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
315 if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
319 if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
322 cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
324 /* Otherwise the first per cpu display shows all 100% idles */
326 } else { /* Non first time invocation */
330 /* First switch the sample pointers: no need to copy */
332 cpu_prev_jif = cpu_jif;
335 /* Get the new samples */
336 for (i = 0; i < num_cpus; i++)
337 read_cpu_jiffy(fp, &cpu_jif[i]);
343 static void do_stats(void)
348 struct save_hist *new_hist;
353 new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
355 * Make a pass through the data to get stats.
357 /* hist_iterations = 0; */
359 for (n = 0; n < ntop; n++) {
363 * Calculate time in cur process. Time is sum of user time
367 new_hist[n].ticks = cur->ticks;
368 new_hist[n].pid = pid;
370 /* find matching entry from previous pass */
372 /* do not start at index 0, continue at last used one
373 * (brought hist_iterations from ~14000 down to 172) */
375 if (prev_hist_count) do {
376 if (prev_hist[i].pid == pid) {
377 cur->pcpu = cur->ticks - prev_hist[i].ticks;
378 total_pcpu += cur->pcpu;
381 i = (i+1) % prev_hist_count;
382 /* hist_iterations++; */
383 } while (i != last_i);
384 /* total_vsz += cur->vsz; */
388 * Save cur frame's information.
391 prev_hist = new_hist;
392 prev_hist_count = ntop;
395 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
397 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
398 /* formats 7 char string (8 with terminating NUL) */
399 static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
402 if (value >= total) { /* 100% ? */
403 strcpy(pbuf, " 100% ");
406 /* else generate " [N/space]N.N% " string */
407 value = 1000 * value / total;
411 pbuf[1] = t ? t + '0' : ' ';
412 pbuf[2] = '0' + (value / 10);
414 pbuf[4] = '0' + (value % 10);
422 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
423 static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
426 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
429 jiffy_counts_t *p_jif, *p_prev_jif;
431 # if ENABLE_FEATURE_TOP_SMP_CPU
435 /* using (unsigned) casts to make operations cheaper */
436 # define CALC_TOTAL_DIFF do { \
437 total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
438 if (total_diff == 0) total_diff = 1; \
441 # if ENABLE_FEATURE_TOP_DECIMALS
442 # define CALC_STAT(xxx) char xxx[8]
443 # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
446 # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
447 # define SHOW_STAT(xxx) xxx
448 # define FMT "%4u%% "
451 # if !ENABLE_FEATURE_TOP_SMP_CPU
455 p_prev_jif = &prev_jif;
457 /* Loop thru CPU(s) */
458 n_cpu_lines = smp_cpu_info ? num_cpus : 1;
459 if (n_cpu_lines > *lines_rem_p)
460 n_cpu_lines = *lines_rem_p;
462 for (i = 0; i < n_cpu_lines; i++) {
464 p_prev_jif = &cpu_prev_jif[i];
468 { /* Need a block: CALC_STAT are declarations */
476 /*CALC_STAT(steal);*/
478 snprintf(scrbuf, scr_width,
479 /* Barely fits in 79 chars when in "decimals" mode. */
480 # if ENABLE_FEATURE_TOP_SMP_CPU
481 "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
482 (smp_cpu_info ? utoa(i) : ""),
484 "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
486 SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
487 SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
488 /*, SHOW_STAT(steal) - what is this 'steal' thing? */
489 /* I doubt anyone wants to know it */
499 #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
500 # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
520 static void parse_meminfo(unsigned long meminfo[MI_MAX])
522 static const char fields[] =
536 char buf[60]; /* actual lines we expect are ~30 chars or less */
540 memset(meminfo, 0, sizeof(meminfo[0]) * MI_MAX);
541 f = xfopen_for_read("meminfo");
542 while (fgets(buf, sizeof(buf), f) != NULL) {
543 char *c = strchr(buf, ':');
547 i = index_in_strings(fields, buf);
549 meminfo[i] = strtoul(c+1, NULL, 10);
554 static unsigned long display_header(int scr_width, int *lines_rem_p)
556 char scrbuf[100]; /* [80] was a bit too low on 8Gb ram box */
558 unsigned long meminfo[MI_MAX];
560 parse_meminfo(meminfo);
562 /* Output memory info */
563 if (scr_width > (int)sizeof(scrbuf))
564 scr_width = sizeof(scrbuf);
565 snprintf(scrbuf, scr_width,
566 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
567 meminfo[MI_MEMTOTAL] - meminfo[MI_MEMFREE],
569 meminfo[MI_MEMSHARED] + meminfo[MI_SHMEM],
572 /* Go to top & clear to the end of screen */
573 printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
576 /* Display CPU time split as percentage of total time.
577 * This displays either a cumulative line or one line per CPU.
579 display_cpus(scr_width, scrbuf, lines_rem_p);
581 /* Read load average as a string */
582 buf = stpcpy(scrbuf, "Load average: ");
583 open_read_close("loadavg", buf, sizeof(scrbuf) - sizeof("Load average: "));
584 scrbuf[scr_width - 1] = '\0';
585 strchrnul(buf, '\n')[0] = '\0';
589 return meminfo[MI_MEMTOTAL];
592 static NOINLINE void display_process_list(int lines_rem, int scr_width)
595 BITS_PER_INT = sizeof(int) * 8
600 unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
601 /* xxx_shift and xxx_scale variables allow us to replace
602 * expensive divides with multiply and shift */
603 unsigned pmem_shift, pmem_scale, pmem_half;
604 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
605 unsigned tmp_unsigned;
606 unsigned pcpu_shift, pcpu_scale, pcpu_half;
610 /* what info of the processes is shown */
611 printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
612 " PID PPID USER STAT VSZ %VSZ"
613 IF_FEATURE_TOP_SMP_PROCESS(" CPU")
614 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
618 #if ENABLE_FEATURE_TOP_DECIMALS
619 # define UPSCALE 1000
620 # define CALC_STAT(name, val) div_t name = div((val), 10)
621 # define SHOW_STAT(name) name.quot, '0'+name.rem
622 # define FMT "%3u.%c"
625 # define CALC_STAT(name, val) unsigned name = (val)
626 # define SHOW_STAT(name) name
630 * %VSZ = s->vsz/MemTotal
632 pmem_shift = BITS_PER_INT-11;
633 pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
634 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
635 while (pmem_scale >= 512) {
639 pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
640 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
641 busy_jifs = cur_jif.busy - prev_jif.busy;
642 /* This happens if there were lots of short-lived processes
643 * between two top updates (e.g. compilation) */
644 if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
647 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
648 * (pcpu is delta of sys+user time between samples)
650 /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
651 * in 0..~64000 range (HZ*update_interval).
652 * we assume that unsigned is at least 32-bit.
655 pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
658 while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
662 tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
663 if (tmp_unsigned != 0)
664 pcpu_scale /= tmp_unsigned;
665 /* we want (s->pcpu * pcpu_scale) to never overflow */
666 while (pcpu_scale >= 1024) {
670 pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
671 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
674 /* Ok, all preliminary data is ready, go through the list */
675 scr_width += 2; /* account for leading '\n' and trailing NUL */
676 if (lines_rem > ntop - G_scroll_ofs)
677 lines_rem = ntop - G_scroll_ofs;
678 s = top + G_scroll_ofs;
679 while (--lines_rem >= 0) {
681 CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
682 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
683 CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
686 if (s->vsz >= 100000)
687 sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
689 sprintf(vsz_str_buf, "%7lu", s->vsz);
690 /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
691 col = snprintf(line_buf, scr_width,
692 "\n" "%5u%6u %-8.8s %s%s" FMT
693 IF_FEATURE_TOP_SMP_PROCESS(" %3d")
694 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
696 s->pid, s->ppid, get_cached_username(s->uid),
697 s->state, vsz_str_buf,
699 IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
700 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
702 if ((int)(col + 1) < scr_width)
703 read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
704 fputs(line_buf, stdout);
705 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
706 cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
709 /* printf(" %d", hist_iterations); */
710 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
718 static void clearmems(void)
720 clear_username_cache();
725 #if ENABLE_FEATURE_USE_TERMIOS
727 static void reset_term(void)
730 tcsetattr_stdin_TCSANOW(&initial_settings);
731 if (ENABLE_FEATURE_CLEAN_UP) {
733 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
739 static void sig_catcher(int sig)
742 kill_myself_with_sig(sig);
745 #endif /* FEATURE_USE_TERMIOS */
751 typedef unsigned long mem_t;
753 typedef struct topmem_status_t {
756 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
766 enum { NUM_SORT_FIELD = 7 };
768 #define topmem ((topmem_status_t*)top)
770 #if ENABLE_FEATURE_TOPMEM
772 static int topmem_sort(char *a, char *b)
777 n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
778 l = *(mem_t*)(a + n);
779 r = *(mem_t*)(b + n);
781 l = ((topmem_status_t*)a)->dirty;
782 r = ((topmem_status_t*)b)->dirty;
784 /* We want to avoid unsigned->signed and truncation errors */
785 /* l>r: -1, l=r: 0, l<r: 1 */
786 n = (l > r) ? -1 : (l != r);
787 return inverted ? -n : n;
790 /* display header info (meminfo / loadavg) */
791 static void display_topmem_header(int scr_width, int *lines_rem_p)
793 unsigned long meminfo[MI_MAX];
795 parse_meminfo(meminfo);
797 snprintf(line_buf, LINE_BUF_SIZE,
798 "Mem total:%lu anon:%lu map:%lu free:%lu",
799 meminfo[MI_MEMTOTAL],
800 meminfo[MI_ANONPAGES],
802 meminfo[MI_MEMFREE]);
803 printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
805 snprintf(line_buf, LINE_BUF_SIZE,
806 " slab:%lu buf:%lu cache:%lu dirty:%lu write:%lu",
811 meminfo[MI_WRITEBACK]);
812 printf("%.*s\n", scr_width, line_buf);
814 snprintf(line_buf, LINE_BUF_SIZE,
815 "Swap total:%lu free:%lu", // TODO: % used?
816 meminfo[MI_SWAPTOTAL],
817 meminfo[MI_SWAPFREE]);
818 printf("%.*s\n", scr_width, line_buf);
823 static void ulltoa6_and_space(unsigned long long ul, char buf[6])
825 /* see http://en.wikipedia.org/wiki/Tera */
826 smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
829 static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
831 #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
832 #define MIN_WIDTH sizeof(HDR_STR)
833 const topmem_status_t *s = topmem + G_scroll_ofs;
836 display_topmem_header(scr_width, &lines_rem);
838 strcpy(line_buf, HDR_STR " COMMAND");
839 /* Mark the ^FIELD^ we sort by */
840 cp = &line_buf[5 + sort_field * 6];
843 do *cp++ = ch; while (*cp == ' ');
845 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
848 if (lines_rem > ntop - G_scroll_ofs)
849 lines_rem = ntop - G_scroll_ofs;
850 while (--lines_rem >= 0) {
851 /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
852 ulltoa6_and_space(s->pid , &line_buf[0*6]);
853 ulltoa6_and_space(s->vsz , &line_buf[1*6]);
854 ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
855 ulltoa6_and_space(s->rss , &line_buf[3*6]);
856 ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
857 ulltoa6_and_space(s->dirty , &line_buf[5*6]);
858 ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
859 ulltoa6_and_space(s->stack , &line_buf[7*6]);
860 line_buf[8*6] = '\0';
861 if (scr_width > (int)MIN_WIDTH) {
862 read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
864 printf("\n""%.*s", scr_width, line_buf);
867 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
874 void display_topmem_process_list(int lines_rem, int scr_width);
875 int topmem_sort(char *a, char *b);
897 EXIT_MASK = (unsigned)-1,
900 #if ENABLE_FEATURE_USE_TERMIOS
901 static unsigned handle_input(unsigned scan_mask, unsigned interval)
903 if (option_mask32 & OPT_EOF) {
904 /* EOF on stdin ("top </dev/null") */
912 c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
913 if (c == -1 && errno != EAGAIN) {
915 option_mask32 |= OPT_EOF;
920 if (c == initial_settings.c_cc[VINTR])
922 if (c == initial_settings.c_cc[VEOF])
925 if (c == KEYCODE_UP) {
929 if (c == KEYCODE_DOWN) {
933 if (c == KEYCODE_HOME) {
937 if (c == KEYCODE_END) {
938 G_scroll_ofs = ntop - G.lines / 2;
941 if (c == KEYCODE_PAGEUP) {
942 G_scroll_ofs -= G.lines / 2;
945 if (c == KEYCODE_PAGEDOWN) {
946 G_scroll_ofs += G.lines / 2;
948 if (G_scroll_ofs >= ntop)
949 G_scroll_ofs = ntop - 1;
950 if (G_scroll_ofs < 0)
955 c |= 0x20; /* lowercase */
960 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
961 sort_function[0] = pid_sort;
965 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
966 sort_function[0] = mem_sort;
967 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
968 sort_function[1] = pcpu_sort;
969 sort_function[2] = time_sort;
973 # if ENABLE_FEATURE_SHOW_THREADS
975 IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
977 scan_mask ^= PSSCAN_TASKS;
981 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
983 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
984 sort_function[0] = pcpu_sort;
985 sort_function[1] = mem_sort;
986 sort_function[2] = time_sort;
990 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
991 sort_function[0] = time_sort;
992 sort_function[1] = mem_sort;
993 sort_function[2] = pcpu_sort;
996 # if ENABLE_FEATURE_TOPMEM
998 scan_mask = TOPMEM_MASK;
1001 prev_hist_count = 0;
1002 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
1010 # if ENABLE_FEATURE_TOP_SMP_CPU
1011 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
1012 if (c == 'c' || c == '1') {
1013 /* User wants to toggle per cpu <> aggregate */
1018 cpu_prev_jif = &prev_jif;
1020 /* Prepare for xrealloc() */
1021 cpu_jif = cpu_prev_jif = NULL;
1024 smp_cpu_info = !smp_cpu_info;
1030 break; /* unknown key -> force refresh */
1037 //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
1038 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
1040 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
1042 //usage:#define top_trivial_usage
1043 //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
1044 //usage:#define top_full_usage "\n\n"
1045 //usage: "Provide a view of process activity in real time."
1046 //usage: "\n""Read the status of all processes from /proc each SECONDS"
1047 //usage: "\n""and display a screenful of them."
1048 //usage: "\n""Keys:"
1050 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
1051 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
1052 //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
1053 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
1054 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
1055 //usage: IF_FEATURE_TOPMEM(
1056 //usage: "\n"" S: show memory"
1058 //usage: "\n"" R: reverse sort"
1059 //usage: IF_SHOW_THREADS_OR_TOP_SMP(
1061 //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
1062 //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
1063 //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
1065 //usage: "\n"" Q,^C: exit"
1067 //usage: "\n""Options:"
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"
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
1083 * TODO: -i STRING param as a better alternative?
1086 int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1087 int top_main(int argc UNUSED_PARAM, char **argv)
1092 char *str_interval, *str_iterations;
1093 unsigned scan_mask = TOP_MASK;
1094 #if ENABLE_FEATURE_USE_TERMIOS
1095 struct termios new_settings;
1100 interval = 5; /* default update interval is 5 seconds */
1101 iterations = 0; /* infinite */
1102 #if ENABLE_FEATURE_TOP_SMP_CPU
1104 /*smp_cpu_info = 0;*/ /* to start with show aggregate */
1106 cpu_prev_jif = &prev_jif;
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;
1117 /* work around for "-d 1" -> "-d -1" done by getopt32
1118 * (opt_complementary == "-" does this) */
1119 if (str_interval[0] == '-')
1121 /* Need to limit it to not overflow poll timeout */
1122 interval = xatou16(str_interval);
1125 if (str_iterations[0] == '-')
1127 iterations = xatou(str_iterations);
1130 /* change to /proc */
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;
1138 sort_function[0] = mem_sort;
1141 if (OPT_BATCH_MODE) {
1142 option_mask32 |= OPT_EOF;
1144 #if ENABLE_FEATURE_USE_TERMIOS
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);
1153 bb_signals(BB_FATAL_SIGS, sig_catcher);
1155 /* Eat initial input, if any */
1156 scan_mask = handle_input(scan_mask, 0);
1159 while (scan_mask != EXIT_MASK) {
1160 procps_status_t *p = NULL;
1162 if (OPT_BATCH_MODE) {
1164 col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
1166 G.lines = 24; /* default */
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) {
1176 if (col > LINE_BUF_SIZE - 2)
1177 col = LINE_BUF_SIZE - 2;
1180 /* read process IDs & status for all the processes */
1182 while ((p = procps_scan(p, scan_mask)) != NULL) {
1185 IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
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;
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;
1201 #if ENABLE_FEATURE_TOPMEM
1203 if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
1204 continue; /* kernel threads are ignored */
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;
1219 } /* end of "while we read /proc" */
1221 bb_error_msg("no process info in /proc");
1225 IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
1226 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1227 if (!prev_hist_count) {
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);
1237 qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
1239 display_process_list(G.lines, col);
1241 #if ENABLE_FEATURE_TOPMEM
1243 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
1244 display_topmem_process_list(G.lines, col);
1248 if (iterations >= 0 && !--iterations)
1250 #if !ENABLE_FEATURE_USE_TERMIOS
1253 scan_mask = handle_input(scan_mask, interval);
1255 } /* end of "while (not Q)" */
1258 #if ENABLE_FEATURE_USE_TERMIOS
1261 return EXIT_SUCCESS;