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>
21 /* Original code Copyrights */
23 * Copyright (c) 1992 Branko Lankester
24 * Copyright (c) 1992 Roger Binns
25 * Copyright (C) 1994-1996 Charles L. Blake.
26 * Copyright (C) 1992-1998 Michael K. Johnson
27 * May be distributed under the conditions of the
28 * GNU Library General Public License
34 typedef struct top_status_t {
36 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
38 unsigned pcpu; /* delta of ticks */
46 typedef struct jiffy_counts_t {
47 unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
48 unsigned long long total;
49 unsigned long long busy;
52 /* This structure stores some critical information from one frame to
53 the next. Used for finding deltas. */
54 typedef struct save_hist {
59 typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
62 enum { SORT_DEPTH = 3 };
68 #if ENABLE_FEATURE_TOPMEM
72 #if ENABLE_FEATURE_USE_TERMIOS
73 struct termios initial_settings;
75 #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
76 cmp_funcp sort_function[1];
78 cmp_funcp sort_function[SORT_DEPTH];
79 struct save_hist *prev_hist;
81 jiffy_counts_t jif, prev_jif;
82 /* int hist_iterations; */
84 /* unsigned long total_vsz; */
88 enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
89 #define G (*(struct globals*)&bb_common_bufsiz1)
92 struct G_sizecheck { \
93 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
97 #define ntop (G.ntop )
98 #define sort_field (G.sort_field )
99 #define inverted (G.inverted )
100 #define initial_settings (G.initial_settings )
101 #define sort_function (G.sort_function )
102 #define prev_hist (G.prev_hist )
103 #define prev_hist_count (G.prev_hist_count )
105 #define prev_jif (G.prev_jif )
106 #define total_pcpu (G.total_pcpu )
107 #define line_buf (G.line_buf )
110 #define OPT_BATCH_MODE (option_mask32 & 0x4)
113 #if ENABLE_FEATURE_USE_TERMIOS
114 static int pid_sort(top_status_t *P, top_status_t *Q)
116 /* Buggy wrt pids with high bit set */
117 /* (linux pids are in [1..2^15-1]) */
118 return (Q->pid - P->pid);
122 static int mem_sort(top_status_t *P, top_status_t *Q)
124 /* We want to avoid unsigned->signed and truncation errors */
125 if (Q->vsz < P->vsz) return -1;
126 return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
130 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
132 static int pcpu_sort(top_status_t *P, top_status_t *Q)
134 /* Buggy wrt ticks with high bit set */
135 /* Affects only processes for which ticks overflow */
136 return (int)Q->pcpu - (int)P->pcpu;
139 static int time_sort(top_status_t *P, top_status_t *Q)
141 /* We want to avoid unsigned->signed and truncation errors */
142 if (Q->ticks < P->ticks) return -1;
143 return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
146 static int mult_lvl_cmp(void* a, void* b)
150 for (i = 0; i < SORT_DEPTH; i++) {
151 cmp_val = (*sort_function[i])(a, b);
159 static void get_jiffy_counts(void)
161 FILE* fp = xfopen("stat", "r");
163 if (fscanf(fp, "cpu %lld %lld %lld %lld %lld %lld %lld %lld",
164 &jif.usr,&jif.nic,&jif.sys,&jif.idle,
165 &jif.iowait,&jif.irq,&jif.softirq,&jif.steal) < 4) {
166 bb_error_msg_and_die("failed to read /proc/stat");
169 jif.total = jif.usr + jif.nic + jif.sys + jif.idle
170 + jif.iowait + jif.irq + jif.softirq + jif.steal;
171 /* procps 2.x does not count iowait as busy time */
172 jif.busy = jif.total - jif.idle - jif.iowait;
176 static void do_stats(void)
181 struct save_hist *new_hist;
186 new_hist = xmalloc(sizeof(struct save_hist)*ntop);
188 * Make a pass through the data to get stats.
190 /* hist_iterations = 0; */
192 for (n = 0; n < ntop; n++) {
196 * Calculate time in cur process. Time is sum of user time
200 new_hist[n].ticks = cur->ticks;
201 new_hist[n].pid = pid;
203 /* find matching entry from previous pass */
205 /* do not start at index 0, continue at last used one
206 * (brought hist_iterations from ~14000 down to 172) */
208 if (prev_hist_count) do {
209 if (prev_hist[i].pid == pid) {
210 cur->pcpu = cur->ticks - prev_hist[i].ticks;
211 total_pcpu += cur->pcpu;
214 i = (i+1) % prev_hist_count;
215 /* hist_iterations++; */
216 } while (i != last_i);
217 /* total_vsz += cur->vsz; */
221 * Save cur frame's information.
224 prev_hist = new_hist;
225 prev_hist_count = ntop;
227 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
229 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
230 /* formats 7 char string (8 with terminating NUL) */
231 static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
234 if (value >= total) { /* 100% ? */
235 strcpy(pbuf, " 100% ");
238 /* else generate " [N/space]N.N% " string */
239 value = 1000 * value / total;
243 pbuf[1] = t ? t + '0' : ' ';
244 pbuf[2] = '0' + (value / 10);
246 pbuf[4] = '0' + (value % 10);
254 static unsigned long display_header(int scr_width)
259 unsigned long total, used, mfree, shared, buffers, cached;
260 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
264 /* read memory info */
265 fp = xfopen("meminfo", "r");
268 * Old kernels (such as 2.4.x) had a nice summary of memory info that
269 * we could parse, however this is gone entirely in 2.6. Try parsing
270 * the old way first, and if that fails, parse each field manually.
272 * First, we read in the first line. Old kernels will have bogus
273 * strings we don't care about, whereas new kernels will start right
277 if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
278 fgets(buf, sizeof(buf), fp); /* skip first line */
280 fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
281 &total, &used, &mfree, &shared, &buffers, &cached);
282 /* convert to kilobytes */
291 * Revert to manual parsing, which incidentally already has the
292 * sizes in kilobytes. This should be safe for both 2.4 and
296 fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
299 * MemShared: is no longer present in 2.6. Report this as 0,
300 * to maintain consistent behavior with normal procps.
302 if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
305 fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
306 fscanf(fp, "Cached: %lu %s\n", &cached, buf);
308 used = total - mfree;
312 /* output memory info */
313 if (scr_width > sizeof(scrbuf))
314 scr_width = sizeof(scrbuf);
315 snprintf(scrbuf, scr_width,
316 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
317 used, mfree, shared, buffers, cached);
318 /* clear screen & go to top */
319 printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf);
321 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
323 * xxx% = (jif.xxx - prev_jif.xxx) / (jif.total - prev_jif.total) * 100%
325 /* using (unsigned) casts to make operations cheaper */
326 total_diff = ((unsigned)(jif.total - prev_jif.total) ? : 1);
327 #if ENABLE_FEATURE_TOP_DECIMALS
328 /* Generated code is approx +0.3k */
329 #define CALC_STAT(xxx) char xxx[8]
330 #define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(jif.xxx - prev_jif.xxx), total_diff)
333 #define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(jif.xxx - prev_jif.xxx) / total_diff
334 #define SHOW_STAT(xxx) xxx
337 { /* need block: CALC_STAT are declarations */
347 snprintf(scrbuf, scr_width,
348 /* Barely fits in 79 chars when in "decimals" mode. */
349 "CPU:"FMT"usr"FMT"sys"FMT"nice"FMT"idle"FMT"io"FMT"irq"FMT"softirq",
350 SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
351 SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
352 //, SHOW_STAT(steal) - what is this 'steal' thing?
353 // I doubt anyone wants to know it
362 /* read load average as a string */
364 open_read_close("loadavg", buf, sizeof("N.NN N.NN N.NN")-1);
365 buf[sizeof("N.NN N.NN N.NN")-1] = '\0';
366 snprintf(scrbuf, scr_width, "Load average: %s", buf);
372 static NOINLINE void display_process_list(int count, int scr_width)
375 BITS_PER_INT = sizeof(int)*8
378 top_status_t *s = top;
380 unsigned long total_memory = display_header(scr_width); /* or use total_vsz? */
381 /* xxx_shift and xxx_scale variables allow us to replace
382 * expensive divides with multiply and shift */
383 unsigned pmem_shift, pmem_scale, pmem_half;
384 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
385 unsigned pcpu_shift, pcpu_scale, pcpu_half;
388 /* what info of the processes is shown */
389 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
390 " PID PPID USER STAT VSZ %MEM %CPU COMMAND");
393 /* !CPU_USAGE_PERCENTAGE */
394 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
395 " PID PPID USER STAT VSZ %MEM COMMAND");
398 #if ENABLE_FEATURE_TOP_DECIMALS
400 #define CALC_STAT(name, val) div_t name = div((val), 10)
401 #define SHOW_STAT(name) name.quot, '0'+name.rem
405 #define CALC_STAT(name, val) unsigned name = (val)
406 #define SHOW_STAT(name) name
410 * MEM% = s->vsz/MemTotal
412 pmem_shift = BITS_PER_INT-11;
413 pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
414 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
415 while (pmem_scale >= 512) {
419 pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
420 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
421 busy_jifs = jif.busy - prev_jif.busy;
422 /* This happens if there were lots of short-lived processes
423 * between two top updates (e.g. compilation) */
424 if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
427 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
428 * (pcpu is delta of sys+user time between samples)
430 /* (jif.xxx - prev_jif.xxx) and s->pcpu are
431 * in 0..~64000 range (HZ*update_interval).
432 * we assume that unsigned is at least 32-bit.
435 pcpu_scale = (UPSCALE*64*(uint16_t)busy_jifs ? : 1);
436 while (pcpu_scale < (1U<<(BITS_PER_INT-2))) {
440 pcpu_scale /= ( (uint16_t)(jif.total-prev_jif.total)*total_pcpu ? : 1);
441 /* we want (s->pcpu * pcpu_scale) to never overflow */
442 while (pcpu_scale >= 1024) {
446 pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
447 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
450 scr_width += 2; /* account for leading '\n' and trailing NUL */
451 /* Ok, all preliminary data is ready, go thru the list */
452 while (count-- > 0) {
454 CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
455 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
456 CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
459 if (s->vsz >= 100000)
460 sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
462 sprintf(vsz_str_buf, "%7ld", s->vsz);
463 // PID PPID USER STAT VSZ %MEM [%CPU] COMMAND
464 col = snprintf(line_buf, scr_width,
465 "\n" "%5u%6u %-8.8s %s%s" FMT
466 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
470 s->pid, s->ppid, get_cached_username(s->uid),
471 s->state, vsz_str_buf,
473 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
477 if (col + 1 < scr_width)
478 read_cmdline(line_buf + col, scr_width - col - 1, s->pid, s->comm);
479 fputs(line_buf, stdout);
480 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
481 jif.busy - prev_jif.busy, jif.total - prev_jif.total); */
484 /* printf(" %d", hist_iterations); */
485 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
493 static void clearmems(void)
495 clear_username_cache();
501 #if ENABLE_FEATURE_USE_TERMIOS
505 static void reset_term(void)
507 tcsetattr(0, TCSANOW, (void *) &initial_settings);
508 if (ENABLE_FEATURE_CLEAN_UP) {
510 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
516 static void sig_catcher(int sig ATTRIBUTE_UNUSED)
521 #endif /* FEATURE_USE_TERMIOS */
527 typedef unsigned long mem_t;
529 typedef struct topmem_status_t {
532 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
542 enum { NUM_SORT_FIELD = 7 };
544 #define topmem ((topmem_status_t*)top)
546 #if ENABLE_FEATURE_TOPMEM
547 static int topmem_sort(char *a, char *b)
552 n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
553 l = *(mem_t*)(a + n);
554 r = *(mem_t*)(b + n);
559 /* We want to avoid unsigned->signed and truncation errors */
560 /* l>r: -1, l=r: 0, l<r: 1 */
561 n = (l > r) ? -1 : (l != r);
562 return inverted ? -n : n;
565 /* Cut "NNNN " out of " NNNN kb" */
566 static char *grab_number(char *str, const char *match, unsigned sz)
568 if (strncmp(str, match, sz) == 0) {
569 str = skip_whitespace(str + sz);
570 (skip_non_whitespace(str))[1] = '\0';
576 /* display header info (meminfo / loadavg) */
577 static void display_topmem_header(int scr_width)
588 /* 5 */ char *swaptotal;
589 /* 6 */ char *swapfree;
591 /* 8 */ char *mwrite;
598 #define total Z.total
599 #define mfree Z.mfree
601 #define cache Z.cache
602 #define swaptotal Z.swaptotal
603 #define swapfree Z.swapfree
604 #define dirty Z.dirty
605 #define mwrite Z.mwrite
611 memset(&Z, 0, sizeof(Z));
613 /* read memory info */
614 fp = xfopen("meminfo", "r");
615 while (fgets(linebuf, sizeof(linebuf), fp)) {
618 #define SCAN(match, name) \
619 p = grab_number(linebuf, match, sizeof(match)-1); \
620 if (p) { name = p; continue; }
622 SCAN("MemTotal:", total);
623 SCAN("MemFree:", mfree);
624 SCAN("Buffers:", buf);
625 SCAN("Cached:", cache);
626 SCAN("SwapTotal:", swaptotal);
627 SCAN("SwapFree:", swapfree);
628 SCAN("Dirty:", dirty);
629 SCAN("Writeback:", mwrite);
630 SCAN("AnonPages:", anon);
631 SCAN("Mapped:", map);
637 #define S(s) (s ? s : "0")
638 snprintf(linebuf, sizeof(linebuf),
639 "Mem %stotal %sanon %smap %sfree",
640 S(total), S(anon), S(map), S(mfree));
641 printf(OPT_BATCH_MODE ? "%.*s\n" : "\e[H\e[J%.*s\n", scr_width, linebuf);
643 snprintf(linebuf, sizeof(linebuf),
644 " %sslab %sbuf %scache %sdirty %swrite",
645 S(slab), S(buf), S(cache), S(dirty), S(mwrite));
646 printf("%.*s\n", scr_width, linebuf);
648 snprintf(linebuf, sizeof(linebuf),
649 "Swap %stotal %sfree", // TODO: % used?
650 S(swaptotal), S(swapfree));
651 printf("%.*s\n", scr_width, linebuf);
654 for (i = 0; i < ARRAY_SIZE(str); i++)
670 // Converts unsigned long long value into compact 5-char
671 // representation. Sixth char is always ' '
672 static void smart_ulltoa6(unsigned long long ul, char buf[6])
676 unsigned v, u, idx = 0;
678 if (ul > 99999) { // do not scale if 99999 or less
683 } while (ul >= 100000);
685 v = ul; // ullong divisions are expensive, avoid them
691 // 99999 or less: use "12345" format
692 // u is value/10, v is last digit
693 c = buf[0] = " 123456789"[u/1000];
694 if (c != ' ') fmt = "0123456789";
695 c = buf[1] = fmt[u/100%10];
696 if (c != ' ') fmt = "0123456789";
697 c = buf[2] = fmt[u/10%10];
698 if (c != ' ') fmt = "0123456789";
700 buf[4] = "0123456789"[v];
702 // value has been scaled into 0..9999.9 range
703 // u is value, v is 1/10ths (allows for 92.1M format)
705 // value is >= 100: use "1234M', " 123M" formats
706 c = buf[0] = " 123456789"[u/1000];
707 if (c != ' ') fmt = "0123456789";
708 c = buf[1] = fmt[u/100%10];
709 if (c != ' ') fmt = "0123456789";
714 // value is < 100: use "92.1M" format
715 c = buf[0] = " 123456789"[u/10];
716 if (c != ' ') fmt = "0123456789";
720 buf[3] = "0123456789"[v];
721 // see http://en.wikipedia.org/wiki/Tera
722 buf[4] = " mgtpezy"[idx];
727 static NOINLINE void display_topmem_process_list(int count, int scr_width)
729 #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
730 #define MIN_WIDTH sizeof(HDR_STR)
731 const topmem_status_t *s = topmem;
733 display_topmem_header(scr_width);
734 strcpy(line_buf, HDR_STR " COMMAND");
735 line_buf[5 + sort_field * 6] = '*';
736 printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
738 while (--count >= 0) {
739 // PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND
740 smart_ulltoa6(s->pid , &line_buf[0*6]);
741 smart_ulltoa6(s->vsz , &line_buf[1*6]);
742 smart_ulltoa6(s->vszrw , &line_buf[2*6]);
743 smart_ulltoa6(s->rss , &line_buf[3*6]);
744 smart_ulltoa6(s->rss_sh , &line_buf[4*6]);
745 smart_ulltoa6(s->dirty , &line_buf[5*6]);
746 smart_ulltoa6(s->dirty_sh, &line_buf[6*6]);
747 smart_ulltoa6(s->stack , &line_buf[7*6]);
748 line_buf[8*6] = '\0';
749 if (scr_width > MIN_WIDTH) {
750 read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
752 printf("\n""%.*s", scr_width, line_buf);
755 bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
761 void display_topmem_process_list(int count, int scr_width);
762 int topmem_sort(char *a, char *b);
785 int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
786 int top_main(int argc, char **argv)
788 int count, lines, col;
791 char *sinterval, *siterations;
792 SKIP_FEATURE_TOPMEM(const) unsigned scan_mask = TOP_MASK;
793 #if ENABLE_FEATURE_USE_TERMIOS
794 struct termios new_settings;
795 struct pollfd pfd[1];
799 pfd[0].events = POLLIN;
800 #endif /* FEATURE_USE_TERMIOS */
804 interval = 5; /* default update rate is 5 seconds */
805 iterations = 0; /* infinite */
807 /* do normal option parsing */
808 opt_complementary = "-";
809 getopt32(argv, "d:n:b", &sinterval, &siterations);
810 if (option_mask32 & 0x1) {
811 /* Need to limit it to not overflow poll timeout */
812 interval = xatou16(sinterval); // -d
814 if (option_mask32 & 0x2)
815 iterations = xatoi_u(siterations); // -n
816 //if (option_mask32 & 0x4) // -b
818 /* change to /proc */
820 #if ENABLE_FEATURE_USE_TERMIOS
821 tcgetattr(0, (void *) &initial_settings);
822 memcpy(&new_settings, &initial_settings, sizeof(new_settings));
823 /* unbuffered input, turn off echo */
824 new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
826 signal(SIGTERM, sig_catcher);
827 signal(SIGINT, sig_catcher);
828 tcsetattr(0, TCSANOW, (void *) &new_settings);
830 #endif /* FEATURE_USE_TERMIOS */
832 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
833 sort_function[0] = pcpu_sort;
834 sort_function[1] = mem_sort;
835 sort_function[2] = time_sort;
837 sort_function[0] = mem_sort;
838 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
841 procps_status_t *p = NULL;
843 lines = 24; /* default */
845 #if ENABLE_FEATURE_USE_TERMIOS
846 get_terminal_width_height(0, &col, &lines);
847 if (lines < 5 || col < 10) {
851 #endif /* FEATURE_USE_TERMIOS */
852 if (col > LINE_BUF_SIZE-2) /* +2 bytes for '\n', NUL, */
853 col = LINE_BUF_SIZE-2;
854 if (!ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && scan_mask == TOP_MASK)
859 /* read process IDs & status for all the processes */
860 while ((p = procps_scan(p, scan_mask)) != NULL) {
862 if (scan_mask == TOP_MASK) {
864 top = xrealloc(top, (++ntop) * sizeof(*top));
866 top[n].ppid = p->ppid;
868 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
869 top[n].ticks = p->stime + p->utime;
872 strcpy(top[n].state, p->state);
873 strcpy(top[n].comm, p->comm);
874 } else { /* TOPMEM */
875 #if ENABLE_FEATURE_TOPMEM
876 if (!(p->mapped_ro | p->mapped_rw))
877 continue; /* kernel threads are ignored */
879 top = xrealloc(topmem, (++ntop) * sizeof(*topmem));
880 strcpy(topmem[n].comm, p->comm);
881 topmem[n].pid = p->pid;
882 topmem[n].vsz = p->mapped_rw + p->mapped_ro;
883 topmem[n].vszrw = p->mapped_rw;
884 topmem[n].rss_sh = p->shared_clean + p->shared_dirty;
885 topmem[n].rss = p->private_clean + p->private_dirty + topmem[n].rss_sh;
886 topmem[n].dirty = p->private_dirty + p->shared_dirty;
887 topmem[n].dirty_sh = p->shared_dirty;
888 topmem[n].stack = p->stack;
893 bb_error_msg_and_die("no process info in /proc");
896 if (scan_mask == TOP_MASK) {
897 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
898 if (!prev_hist_count) {
905 /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
906 qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
908 qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
909 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
910 } else { /* TOPMEM */
911 qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
914 if (OPT_BATCH_MODE || count > ntop) {
917 if (scan_mask == TOP_MASK)
918 display_process_list(count, col);
920 display_topmem_process_list(count, col);
922 if (iterations >= 0 && !--iterations)
924 #if !ENABLE_FEATURE_USE_TERMIOS
927 if (safe_poll(pfd, 1, interval * 1000) > 0) {
928 if (read(0, &c, 1) != 1) /* signal */
930 if (c == initial_settings.c_cc[VINTR])
932 c |= 0x20; /* lowercase */
936 USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
937 sort_function[0] = pid_sort;
940 USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
941 sort_function[0] = mem_sort;
942 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
943 sort_function[1] = pcpu_sort;
944 sort_function[2] = time_sort;
947 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
949 USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
950 sort_function[0] = pcpu_sort;
951 sort_function[1] = mem_sort;
952 sort_function[2] = time_sort;
955 USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
956 sort_function[0] = time_sort;
957 sort_function[1] = mem_sort;
958 sort_function[2] = pcpu_sort;
960 #if ENABLE_FEATURE_TOPMEM
962 scan_mask = TOPMEM_MASK;
966 sort_field = (sort_field + 1) % NUM_SORT_FIELD;
973 #endif /* FEATURE_USE_TERMIOS */