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
56 //config: The top program provides a dynamic real-time view of a running
59 //config:config FEATURE_TOP_INTERACTIVE
60 //config: bool "Accept keyboard commands"
62 //config: depends on TOP
64 //config: Without this, top will only refresh display every 5 seconds.
65 //config: No keyboard commands will work, only ^C to terminate.
67 //config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
68 //config: bool "Show CPU per-process usage percentage"
70 //config: depends on TOP
72 //config: Make top display CPU usage for each process.
73 //config: This adds about 2k.
75 //config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
76 //config: bool "Show CPU global usage percentage"
78 //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
80 //config: Makes top display "CPU: NN% usr NN% sys..." line.
81 //config: This adds about 0.5k.
83 //config:config FEATURE_TOP_SMP_CPU
84 //config: bool "SMP CPU usage display ('c' key)"
86 //config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
88 //config: Allow 'c' key to switch between individual/cumulative CPU stats
89 //config: This adds about 0.5k.
91 //config:config FEATURE_TOP_DECIMALS
92 //config: bool "Show 1/10th of a percent in CPU/mem statistics"
94 //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
96 //config: Show 1/10th of a percent in CPU/mem statistics.
97 //config: This adds about 0.3k.
99 //config:config FEATURE_TOP_SMP_PROCESS
100 //config: bool "Show CPU process runs on ('j' field)"
102 //config: depends on TOP
104 //config: Show CPU where process was last found running on.
105 //config: This is the 'j' field.
107 //config:config FEATURE_TOPMEM
108 //config: bool "Topmem command ('s' key)"
110 //config: depends on TOP
112 //config: Enable 's' in top (gives lots of memory info).
114 //applet:IF_TOP(APPLET(top, BB_DIR_USR_BIN, BB_SUID_DROP))
116 //kbuild:lib-$(CONFIG_TOP) += top.o
119 #include "common_bufsiz.h"
122 typedef struct top_status_t {
124 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
126 unsigned pcpu; /* delta of ticks */
132 #if ENABLE_FEATURE_TOP_SMP_PROCESS
133 int last_seen_on_cpu;
137 typedef struct jiffy_counts_t {
138 /* Linux 2.4.x has only first four */
139 unsigned long long usr, nic, sys, idle;
140 unsigned long long iowait, irq, softirq, steal;
141 unsigned long long total;
142 unsigned long long busy;
145 /* This structure stores some critical information from one frame to
146 the next. Used for finding deltas. */
147 typedef struct save_hist {
152 typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
155 enum { SORT_DEPTH = 3 };
162 #if ENABLE_FEATURE_TOPMEM
165 #if ENABLE_FEATURE_TOP_SMP_CPU
166 smallint smp_cpu_info; /* one/many cpu info lines? */
168 unsigned lines; /* screen height */
169 #if ENABLE_FEATURE_TOP_INTERACTIVE
170 struct termios initial_settings;
172 #define G_scroll_ofs G.scroll_ofs
174 #define G_scroll_ofs 0
176 #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
177 cmp_funcp sort_function[1];
179 cmp_funcp sort_function[SORT_DEPTH];
180 struct save_hist *prev_hist;
182 jiffy_counts_t cur_jif, prev_jif;
183 /* int hist_iterations; */
185 /* unsigned long total_vsz; */
187 #if ENABLE_FEATURE_TOP_SMP_CPU
188 /* Per CPU samples: current and last */
189 jiffy_counts_t *cpu_jif, *cpu_prev_jif;
192 #if ENABLE_FEATURE_TOP_INTERACTIVE
193 char kbd_input[KEYCODE_BUFFER_SIZE];
196 }; //FIX_ALIASING; - large code growth
197 enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
198 #define G (*(struct globals*)bb_common_bufsiz1)
200 #define ntop (G.ntop )
201 #define sort_field (G.sort_field )
202 #define inverted (G.inverted )
203 #define smp_cpu_info (G.smp_cpu_info )
204 #define initial_settings (G.initial_settings )
205 #define sort_function (G.sort_function )
206 #define prev_hist (G.prev_hist )
207 #define prev_hist_count (G.prev_hist_count )
208 #define cur_jif (G.cur_jif )
209 #define prev_jif (G.prev_jif )
210 #define cpu_jif (G.cpu_jif )
211 #define cpu_prev_jif (G.cpu_prev_jif )
212 #define num_cpus (G.num_cpus )
213 #define total_pcpu (G.total_pcpu )
214 #define line_buf (G.line_buf )
215 #define INIT_G() do { \
216 setup_common_bufsiz(); \
217 BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
218 BUILD_BUG_ON(LINE_BUF_SIZE <= 80); \
226 OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
228 #define OPT_BATCH_MODE (option_mask32 & OPT_b)
231 #if ENABLE_FEATURE_TOP_INTERACTIVE
232 static int pid_sort(top_status_t *P, top_status_t *Q)
234 /* Buggy wrt pids with high bit set */
235 /* (linux pids are in [1..2^15-1]) */
236 return (Q->pid - P->pid);
240 static int mem_sort(top_status_t *P, top_status_t *Q)
242 /* We want to avoid unsigned->signed and truncation errors */
243 if (Q->vsz < P->vsz) return -1;
244 return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
248 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
250 static int pcpu_sort(top_status_t *P, top_status_t *Q)
252 /* Buggy wrt ticks with high bit set */
253 /* Affects only processes for which ticks overflow */
254 return (int)Q->pcpu - (int)P->pcpu;
257 static int time_sort(top_status_t *P, top_status_t *Q)
259 /* We want to avoid unsigned->signed and truncation errors */
260 if (Q->ticks < P->ticks) return -1;
261 return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
264 static int mult_lvl_cmp(void* a, void* b)
268 for (i = 0; i < SORT_DEPTH; i++) {
269 cmp_val = (*sort_function[i])(a, b);
273 return inverted ? -cmp_val : cmp_val;
276 static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
278 #if !ENABLE_FEATURE_TOP_SMP_CPU
279 static const char fmt[] ALIGN1 = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
281 static const char fmt[] ALIGN1 = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
285 if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
287 ret = sscanf(line_buf, fmt,
288 &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
289 &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
292 p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
293 + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
294 /* procps 2.x does not count iowait as busy time */
295 p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
301 static void get_jiffy_counts(void)
303 FILE* fp = xfopen_for_read("stat");
305 /* We need to parse cumulative counts even if SMP CPU display is on,
306 * they are used to calculate per process CPU% */
308 if (read_cpu_jiffy(fp, &cur_jif) < 4)
309 bb_error_msg_and_die("can't read '%s'", "/proc/stat");
311 #if !ENABLE_FEATURE_TOP_SMP_CPU
321 /* First time here. How many CPUs?
322 * There will be at least 1 /proc/stat line with cpu%d
325 cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
326 if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
330 if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
333 cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
335 /* Otherwise the first per cpu display shows all 100% idles */
337 } else { /* Non first time invocation */
341 /* First switch the sample pointers: no need to copy */
343 cpu_prev_jif = cpu_jif;
346 /* Get the new samples */
347 for (i = 0; i < num_cpus; i++)
348 read_cpu_jiffy(fp, &cpu_jif[i]);
354 static void do_stats(void)
359 struct save_hist *new_hist;
364 new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
366 * Make a pass through the data to get stats.
368 /* hist_iterations = 0; */
370 for (n = 0; n < ntop; n++) {
374 * Calculate time in cur process. Time is sum of user time
378 new_hist[n].ticks = cur->ticks;
379 new_hist[n].pid = pid;
381 /* find matching entry from previous pass */
383 /* do not start at index 0, continue at last used one
384 * (brought hist_iterations from ~14000 down to 172) */
386 if (prev_hist_count) do {
387 if (prev_hist[i].pid == pid) {
388 cur->pcpu = cur->ticks - prev_hist[i].ticks;
389 total_pcpu += cur->pcpu;
392 i = (i+1) % prev_hist_count;
393 /* hist_iterations++; */
394 } while (i != last_i);
395 /* total_vsz += cur->vsz; */
399 * Save cur frame's information.
402 prev_hist = new_hist;
403 prev_hist_count = ntop;
406 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
408 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
409 /* formats 7 char string (8 with terminating NUL) */
410 static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
413 if (value >= total) { /* 100% ? */
414 strcpy(pbuf, " 100% ");
417 /* else generate " [N/space]N.N% " string */
418 value = 1000 * value / total;
422 pbuf[1] = t ? t + '0' : ' ';
423 pbuf[2] = '0' + (value / 10);
425 pbuf[4] = '0' + (value % 10);
433 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
434 static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
437 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
440 jiffy_counts_t *p_jif, *p_prev_jif;
442 # if ENABLE_FEATURE_TOP_SMP_CPU
446 /* using (unsigned) casts to make operations cheaper */
447 # define CALC_TOTAL_DIFF do { \
448 total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
449 if (total_diff == 0) total_diff = 1; \
452 # if ENABLE_FEATURE_TOP_DECIMALS
453 # define CALC_STAT(xxx) char xxx[8]
454 # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
457 # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
458 # define SHOW_STAT(xxx) xxx
459 # define FMT "%4u%% "
462 # if !ENABLE_FEATURE_TOP_SMP_CPU
466 p_prev_jif = &prev_jif;
468 /* Loop thru CPU(s) */
469 n_cpu_lines = smp_cpu_info ? num_cpus : 1;
470 if (n_cpu_lines > *lines_rem_p)
471 n_cpu_lines = *lines_rem_p;
473 for (i = 0; i < n_cpu_lines; i++) {
475 p_prev_jif = &cpu_prev_jif[i];
479 { /* Need a block: CALC_STAT are declarations */
487 /*CALC_STAT(steal);*/
489 snprintf(scrbuf, scr_width,
490 /* Barely fits in 79 chars when in "decimals" mode. */
491 # if ENABLE_FEATURE_TOP_SMP_CPU
492 "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
493 (smp_cpu_info ? utoa(i) : ""),
495 "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
497 SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
498 SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
499 /*, SHOW_STAT(steal) - what is this 'steal' thing? */
500 /* I doubt anyone wants to know it */
510 #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
511 # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
531 static void parse_meminfo(unsigned long meminfo[MI_MAX])
533 static const char fields[] ALIGN1 =
547 char buf[60]; /* actual lines we expect are ~30 chars or less */
551 memset(meminfo, 0, sizeof(meminfo[0]) * MI_MAX);
552 f = xfopen_for_read("meminfo");
553 while (fgets(buf, sizeof(buf), f) != NULL) {
554 char *c = strchr(buf, ':');
558 i = index_in_strings(fields, buf);
560 meminfo[i] = strtoul(c+1, NULL, 10);
565 static unsigned long display_header(int scr_width, int *lines_rem_p)
567 char scrbuf[100]; /* [80] was a bit too low on 8Gb ram box */
569 unsigned long meminfo[MI_MAX];
571 parse_meminfo(meminfo);
573 /* Output memory info */
574 if (scr_width > (int)sizeof(scrbuf))
575 scr_width = sizeof(scrbuf);
576 snprintf(scrbuf, scr_width,
577 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
578 meminfo[MI_MEMTOTAL] - meminfo[MI_MEMFREE],
580 meminfo[MI_MEMSHARED] + meminfo[MI_SHMEM],
583 /* Go to top & clear to the end of screen */
584 printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
587 /* Display CPU time split as percentage of total time.
588 * This displays either a cumulative line or one line per CPU.
590 display_cpus(scr_width, scrbuf, lines_rem_p);
592 /* Read load average as a string */
593 buf = stpcpy(scrbuf, "Load average: ");
594 open_read_close("loadavg", buf, sizeof(scrbuf) - sizeof("Load average: "));
595 scrbuf[scr_width - 1] = '\0';
596 strchrnul(buf, '\n')[0] = '\0';
600 return meminfo[MI_MEMTOTAL];
603 static NOINLINE void display_process_list(int lines_rem, int scr_width)
606 BITS_PER_INT = sizeof(int) * 8
611 unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
612 /* xxx_shift and xxx_scale variables allow us to replace
613 * expensive divides with multiply and shift */
614 unsigned pmem_shift, pmem_scale, pmem_half;
615 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
616 unsigned tmp_unsigned;
617 unsigned pcpu_shift, pcpu_scale, pcpu_half;
621 /* what info of the processes is shown */
622 printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
623 " PID PPID USER STAT VSZ %VSZ"
624 IF_FEATURE_TOP_SMP_PROCESS(" CPU")
625 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
629 #if ENABLE_FEATURE_TOP_DECIMALS
630 # define UPSCALE 1000
631 # define CALC_STAT(name, val) div_t name = div((val), 10)
632 # define SHOW_STAT(name) name.quot, '0'+name.rem
633 # define FMT "%3u.%c"
636 # define CALC_STAT(name, val) unsigned name = (val)
637 # define SHOW_STAT(name) name
641 * %VSZ = s->vsz/MemTotal
643 pmem_shift = BITS_PER_INT-11;
644 pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
645 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
646 while (pmem_scale >= 512) {
650 pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
651 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
652 busy_jifs = cur_jif.busy - prev_jif.busy;
653 /* This happens if there were lots of short-lived processes
654 * between two top updates (e.g. compilation) */
655 if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
658 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
659 * (pcpu is delta of sys+user time between samples)
661 /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
662 * in 0..~64000 range (HZ*update_interval).
663 * we assume that unsigned is at least 32-bit.
666 pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
669 while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
673 tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
674 if (tmp_unsigned != 0)
675 pcpu_scale /= tmp_unsigned;
676 /* we want (s->pcpu * pcpu_scale) to never overflow */
677 while (pcpu_scale >= 1024) {
681 pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
682 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
685 /* Ok, all preliminary data is ready, go through the list */
686 scr_width += 2; /* account for leading '\n' and trailing NUL */
687 if (lines_rem > ntop - G_scroll_ofs)
688 lines_rem = ntop - G_scroll_ofs;
689 s = top + G_scroll_ofs;
690 while (--lines_rem >= 0) {
692 CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
693 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
694 CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
697 if (s->vsz >= 100000)
698 sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
700 sprintf(vsz_str_buf, "%7lu", s->vsz);
701 /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
702 col = snprintf(line_buf, scr_width,
703 "\n" "%5u%6u %-8.8s %s%s" FMT
704 IF_FEATURE_TOP_SMP_PROCESS(" %3d")
705 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
707 s->pid, s->ppid, get_cached_username(s->uid),
708 s->state, vsz_str_buf,
710 IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
711 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
713 if ((int)(col + 1) < scr_width)
714 read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
715 fputs(line_buf, stdout);
716 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
717 cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
720 /* printf(" %d", hist_iterations); */
721 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
729 static void clearmems(void)
731 clear_username_cache();
736 #if ENABLE_FEATURE_TOP_INTERACTIVE
737 static void reset_term(void)
740 tcsetattr_stdin_TCSANOW(&initial_settings);
743 static void sig_catcher(int sig)
746 kill_myself_with_sig(sig);
748 #endif /* FEATURE_TOP_INTERACTIVE */
754 typedef unsigned long mem_t;
756 typedef struct topmem_status_t {
759 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
769 enum { NUM_SORT_FIELD = 7 };
771 #define topmem ((topmem_status_t*)top)
773 #if ENABLE_FEATURE_TOPMEM
775 static int topmem_sort(char *a, char *b)
780 n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
781 l = *(mem_t*)(a + n);
782 r = *(mem_t*)(b + n);
784 l = ((topmem_status_t*)a)->dirty;
785 r = ((topmem_status_t*)b)->dirty;
787 /* We want to avoid unsigned->signed and truncation errors */
788 /* l>r: -1, l=r: 0, l<r: 1 */
789 n = (l > r) ? -1 : (l != r);
790 return inverted ? -n : n;
793 /* display header info (meminfo / loadavg) */
794 static void display_topmem_header(int scr_width, int *lines_rem_p)
796 unsigned long meminfo[MI_MAX];
798 parse_meminfo(meminfo);
800 snprintf(line_buf, LINE_BUF_SIZE,
801 "Mem total:%lu anon:%lu map:%lu free:%lu",
802 meminfo[MI_MEMTOTAL],
803 meminfo[MI_ANONPAGES],
805 meminfo[MI_MEMFREE]);
806 printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
808 snprintf(line_buf, LINE_BUF_SIZE,
809 " slab:%lu buf:%lu cache:%lu dirty:%lu write:%lu",
814 meminfo[MI_WRITEBACK]);
815 printf("%.*s\n", scr_width, line_buf);
817 snprintf(line_buf, LINE_BUF_SIZE,
818 "Swap total:%lu free:%lu", // TODO: % used?
819 meminfo[MI_SWAPTOTAL],
820 meminfo[MI_SWAPFREE]);
821 printf("%.*s\n", scr_width, line_buf);
826 static void ulltoa6_and_space(unsigned long long ul, char buf[6])
828 /* see http://en.wikipedia.org/wiki/Tera */
829 smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
832 static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
834 #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
835 #define MIN_WIDTH sizeof(HDR_STR)
836 const topmem_status_t *s = topmem + G_scroll_ofs;
839 display_topmem_header(scr_width, &lines_rem);
841 strcpy(line_buf, HDR_STR " COMMAND");
842 /* Mark the ^FIELD^ we sort by */
843 cp = &line_buf[5 + sort_field * 6];
846 do *cp++ = ch; while (*cp == ' ');
848 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
851 if (lines_rem > ntop - G_scroll_ofs)
852 lines_rem = ntop - G_scroll_ofs;
853 while (--lines_rem >= 0) {
854 /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
855 ulltoa6_and_space(s->pid , &line_buf[0*6]);
856 ulltoa6_and_space(s->vsz , &line_buf[1*6]);
857 ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
858 ulltoa6_and_space(s->rss , &line_buf[3*6]);
859 ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
860 ulltoa6_and_space(s->dirty , &line_buf[5*6]);
861 ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
862 ulltoa6_and_space(s->stack , &line_buf[7*6]);
863 line_buf[8*6] = '\0';
864 if (scr_width > (int)MIN_WIDTH) {
865 read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
867 printf("\n""%.*s", scr_width, line_buf);
870 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
877 void display_topmem_process_list(int lines_rem, int scr_width);
878 int topmem_sort(char *a, char *b);
900 EXIT_MASK = (unsigned)-1,
903 #if ENABLE_FEATURE_TOP_INTERACTIVE
904 static unsigned handle_input(unsigned scan_mask, unsigned interval)
906 if (option_mask32 & OPT_EOF) {
907 /* EOF on stdin ("top </dev/null") */
915 c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
916 if (c == -1 && errno != EAGAIN) {
918 option_mask32 |= OPT_EOF;
923 if (c == initial_settings.c_cc[VINTR])
925 if (c == initial_settings.c_cc[VEOF])
928 if (c == KEYCODE_UP) {
932 if (c == KEYCODE_DOWN) {
936 if (c == KEYCODE_HOME) {
940 if (c == KEYCODE_END) {
941 G_scroll_ofs = ntop - G.lines / 2;
944 if (c == KEYCODE_PAGEUP) {
945 G_scroll_ofs -= G.lines / 2;
948 if (c == KEYCODE_PAGEDOWN) {
949 G_scroll_ofs += G.lines / 2;
951 if (G_scroll_ofs >= ntop)
952 G_scroll_ofs = ntop - 1;
953 if (G_scroll_ofs < 0)
958 c |= 0x20; /* lowercase */
963 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
964 sort_function[0] = pid_sort;
968 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
969 sort_function[0] = mem_sort;
970 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
971 sort_function[1] = pcpu_sort;
972 sort_function[2] = time_sort;
976 # if ENABLE_FEATURE_SHOW_THREADS
978 IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
980 scan_mask ^= PSSCAN_TASKS;
984 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
986 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
987 sort_function[0] = pcpu_sort;
988 sort_function[1] = mem_sort;
989 sort_function[2] = time_sort;
993 IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
994 sort_function[0] = time_sort;
995 sort_function[1] = mem_sort;
996 sort_function[2] = pcpu_sort;
999 # if ENABLE_FEATURE_TOPMEM
1001 scan_mask = TOPMEM_MASK;
1004 prev_hist_count = 0;
1005 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
1013 # if ENABLE_FEATURE_TOP_SMP_CPU
1014 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
1015 if (c == 'c' || c == '1') {
1016 /* User wants to toggle per cpu <> aggregate */
1021 cpu_prev_jif = &prev_jif;
1023 /* Prepare for xrealloc() */
1024 cpu_jif = cpu_prev_jif = NULL;
1027 smp_cpu_info = !smp_cpu_info;
1033 break; /* unknown key -> force refresh */
1040 //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
1041 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
1043 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
1045 //usage:#define top_trivial_usage
1046 //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
1047 //usage:#define top_full_usage "\n\n"
1048 //usage: "Provide a view of process activity in real time."
1049 //usage: "\n""Read the status of all processes from /proc each SECONDS"
1050 //usage: "\n""and display a screenful of them."
1052 //usage: IF_FEATURE_TOP_INTERACTIVE(
1055 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
1056 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
1057 //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
1058 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
1059 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
1060 //usage: IF_FEATURE_TOPMEM(
1061 //usage: "\n"" S: show memory"
1063 //usage: "\n"" R: reverse sort"
1064 //usage: IF_SHOW_THREADS_OR_TOP_SMP(
1066 //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
1067 //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
1068 //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
1070 //usage: "\n"" Q,^C: exit"
1072 //usage: "\n""Options:"
1074 //usage: "\n"" -b Batch mode"
1075 //usage: "\n"" -n N Exit after N iterations"
1076 //usage: "\n"" -d N Delay between updates"
1077 //usage: IF_FEATURE_TOPMEM(
1078 //usage: "\n"" -m Same as 's' key"
1081 /* Interactive testing:
1082 * echo sss | ./busybox top
1083 * - shows memory screen
1084 * echo sss | ./busybox top -bn1 >mem
1085 * - saves memory screen - the *whole* list, not first NROWS processes!
1086 * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
1087 * - saves several different screens, and exits
1089 * TODO: -i STRING param as a better alternative?
1092 int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1093 int top_main(int argc UNUSED_PARAM, char **argv)
1098 char *str_interval, *str_iterations;
1099 unsigned scan_mask = TOP_MASK;
1103 interval = 5; /* default update interval is 5 seconds */
1104 iterations = 0; /* infinite */
1105 #if ENABLE_FEATURE_TOP_SMP_CPU
1107 /*smp_cpu_info = 0;*/ /* to start with show aggregate */
1109 cpu_prev_jif = &prev_jif;
1112 /* all args are options; -n NUM */
1113 opt_complementary = "-"; /* options can be specified w/o dash */
1114 col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
1115 #if ENABLE_FEATURE_TOPMEM
1116 if (col & OPT_m) /* -m (busybox specific) */
1117 scan_mask = TOPMEM_MASK;
1120 /* work around for "-d 1" -> "-d -1" done by getopt32
1121 * (opt_complementary == "-" does this) */
1122 if (str_interval[0] == '-')
1124 /* Need to limit it to not overflow poll timeout */
1125 interval = xatou16(str_interval);
1128 if (str_iterations[0] == '-')
1130 iterations = xatou(str_iterations);
1133 /* change to /proc */
1136 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1137 sort_function[0] = pcpu_sort;
1138 sort_function[1] = mem_sort;
1139 sort_function[2] = time_sort;
1141 sort_function[0] = mem_sort;
1144 if (OPT_BATCH_MODE) {
1145 option_mask32 |= OPT_EOF;
1147 #if ENABLE_FEATURE_TOP_INTERACTIVE
1149 /* Turn on unbuffered input; turn off echoing, ^C ^Z etc */
1150 set_termios_to_raw(STDIN_FILENO, &initial_settings, TERMIOS_CLEAR_ISIG);
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 /* We output to stdout, we need size of stdout (not stdin)! */
1169 get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
1170 if (G.lines < 5 || col < 10) {
1174 if (col > LINE_BUF_SIZE - 2)
1175 col = LINE_BUF_SIZE - 2;
1178 /* read process IDs & status for all the processes */
1180 while ((p = procps_scan(p, scan_mask)) != NULL) {
1183 IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
1185 top = xrealloc_vector(top, 6, ntop++);
1186 top[n].pid = p->pid;
1187 top[n].ppid = p->ppid;
1188 top[n].vsz = p->vsz;
1189 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1190 top[n].ticks = p->stime + p->utime;
1192 top[n].uid = p->uid;
1193 strcpy(top[n].state, p->state);
1194 strcpy(top[n].comm, p->comm);
1195 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1196 top[n].last_seen_on_cpu = p->last_seen_on_cpu;
1199 #if ENABLE_FEATURE_TOPMEM
1201 if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
1202 continue; /* kernel threads are ignored */
1204 /* No bug here - top and topmem are the same */
1205 top = xrealloc_vector(topmem, 6, ntop++);
1206 strcpy(topmem[n].comm, p->comm);
1207 topmem[n].pid = p->pid;
1208 topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
1209 topmem[n].vszrw = p->smaps.mapped_rw;
1210 topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
1211 topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
1212 topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
1213 topmem[n].dirty_sh = p->smaps.shared_dirty;
1214 topmem[n].stack = p->smaps.stack;
1217 } /* end of "while we read /proc" */
1219 bb_error_msg("no process info in /proc");
1223 IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
1224 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1225 if (!prev_hist_count) {
1232 /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
1233 qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
1235 qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
1237 display_process_list(G.lines, col);
1239 #if ENABLE_FEATURE_TOPMEM
1241 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
1242 display_topmem_process_list(G.lines, col);
1246 if (iterations >= 0 && !--iterations)
1248 #if !ENABLE_FEATURE_TOP_INTERACTIVE
1251 scan_mask = handle_input(scan_mask, interval);
1253 } /* end of "while (not Q)" */
1256 #if ENABLE_FEATURE_TOP_INTERACTIVE
1259 if (ENABLE_FEATURE_CLEAN_UP) {
1261 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1265 return EXIT_SUCCESS;