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 tarball for details.
37 typedef struct top_status_t
{
39 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
41 unsigned pcpu
; /* delta of ticks */
47 #if ENABLE_FEATURE_TOP_SMP_PROCESS
52 typedef struct jiffy_counts_t
{
53 /* Linux 2.4.x has only first four */
54 unsigned long long usr
, nic
, sys
, idle
;
55 unsigned long long iowait
, irq
, softirq
, steal
;
56 unsigned long long total
;
57 unsigned long long busy
;
60 /* This structure stores some critical information from one frame to
61 the next. Used for finding deltas. */
62 typedef struct save_hist
{
67 typedef int (*cmp_funcp
)(top_status_t
*P
, top_status_t
*Q
);
70 enum { SORT_DEPTH
= 3 };
76 #if ENABLE_FEATURE_TOPMEM
80 #if ENABLE_FEATURE_TOP_SMP_CPU
81 smallint smp_cpu_info
; /* one/many cpu info lines? */
83 #if ENABLE_FEATURE_USE_TERMIOS
84 struct termios initial_settings
;
86 #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
87 cmp_funcp sort_function
[1];
89 cmp_funcp sort_function
[SORT_DEPTH
];
90 struct save_hist
*prev_hist
;
92 jiffy_counts_t cur_jif
, prev_jif
;
93 /* int hist_iterations; */
95 /* unsigned long total_vsz; */
97 #if ENABLE_FEATURE_TOP_SMP_CPU
98 /* Per CPU samples: current and last */
99 jiffy_counts_t
*cpu_jif
, *cpu_prev_jif
;
105 enum { LINE_BUF_SIZE
= COMMON_BUFSIZE
- offsetof(struct globals
, line_buf
) };
107 #define G (*(struct globals*)&bb_common_bufsiz1)
108 #define INIT_G() do { \
109 struct G_sizecheck { \
110 char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
114 #define ntop (G.ntop )
115 #define sort_field (G.sort_field )
116 #define inverted (G.inverted )
117 #define smp_cpu_info (G.smp_cpu_info )
118 #define initial_settings (G.initial_settings )
119 #define sort_function (G.sort_function )
120 #define prev_hist (G.prev_hist )
121 #define prev_hist_count (G.prev_hist_count )
122 #define cur_jif (G.cur_jif )
123 #define prev_jif (G.prev_jif )
124 #define cpu_jif (G.cpu_jif )
125 #define cpu_prev_jif (G.cpu_prev_jif )
126 #define num_cpus (G.num_cpus )
127 #define total_pcpu (G.total_pcpu )
128 #define line_buf (G.line_buf )
134 OPT_EOF
= (1 << 3), /* pseudo: "we saw EOF in stdin" */
136 #define OPT_BATCH_MODE (option_mask32 & OPT_b)
139 #if ENABLE_FEATURE_USE_TERMIOS
140 static int pid_sort(top_status_t
*P
, top_status_t
*Q
)
142 /* Buggy wrt pids with high bit set */
143 /* (linux pids are in [1..2^15-1]) */
144 return (Q
->pid
- P
->pid
);
148 static int mem_sort(top_status_t
*P
, top_status_t
*Q
)
150 /* We want to avoid unsigned->signed and truncation errors */
151 if (Q
->vsz
< P
->vsz
) return -1;
152 return Q
->vsz
!= P
->vsz
; /* 0 if ==, 1 if > */
156 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
158 static int pcpu_sort(top_status_t
*P
, top_status_t
*Q
)
160 /* Buggy wrt ticks with high bit set */
161 /* Affects only processes for which ticks overflow */
162 return (int)Q
->pcpu
- (int)P
->pcpu
;
165 static int time_sort(top_status_t
*P
, top_status_t
*Q
)
167 /* We want to avoid unsigned->signed and truncation errors */
168 if (Q
->ticks
< P
->ticks
) return -1;
169 return Q
->ticks
!= P
->ticks
; /* 0 if ==, 1 if > */
172 static int mult_lvl_cmp(void* a
, void* b
)
176 for (i
= 0; i
< SORT_DEPTH
; i
++) {
177 cmp_val
= (*sort_function
[i
])(a
, b
);
184 static NOINLINE
int read_cpu_jiffy(FILE *fp
, jiffy_counts_t
*p_jif
)
186 #if !ENABLE_FEATURE_TOP_SMP_CPU
187 static const char fmt
[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
189 static const char fmt
[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
193 if (!fgets(line_buf
, LINE_BUF_SIZE
, fp
) || line_buf
[0] != 'c' /* not "cpu" */)
195 ret
= sscanf(line_buf
, fmt
,
196 &p_jif
->usr
, &p_jif
->nic
, &p_jif
->sys
, &p_jif
->idle
,
197 &p_jif
->iowait
, &p_jif
->irq
, &p_jif
->softirq
,
200 p_jif
->total
= p_jif
->usr
+ p_jif
->nic
+ p_jif
->sys
+ p_jif
->idle
201 + p_jif
->iowait
+ p_jif
->irq
+ p_jif
->softirq
+ p_jif
->steal
;
202 /* procps 2.x does not count iowait as busy time */
203 p_jif
->busy
= p_jif
->total
- p_jif
->idle
- p_jif
->iowait
;
209 static void get_jiffy_counts(void)
211 FILE* fp
= xfopen_for_read("stat");
213 /* We need to parse cumulative counts even if SMP CPU display is on,
214 * they are used to calculate per process CPU% */
216 if (read_cpu_jiffy(fp
, &cur_jif
) < 4)
217 bb_error_msg_and_die("can't read /proc/stat");
219 #if !ENABLE_FEATURE_TOP_SMP_CPU
229 /* First time here. How many CPUs?
230 * There will be at least 1 /proc/stat line with cpu%d
233 cpu_jif
= xrealloc_vector(cpu_jif
, 1, num_cpus
);
234 if (read_cpu_jiffy(fp
, &cpu_jif
[num_cpus
]) <= 4)
238 if (num_cpus
== 0) /* /proc/stat with only "cpu ..." line?! */
241 cpu_prev_jif
= xzalloc(sizeof(cpu_prev_jif
[0]) * num_cpus
);
243 /* Otherwise the first per cpu display shows all 100% idles */
245 } else { /* Non first time invocation */
249 /* First switch the sample pointers: no need to copy */
251 cpu_prev_jif
= cpu_jif
;
254 /* Get the new samples */
255 for (i
= 0; i
< num_cpus
; i
++)
256 read_cpu_jiffy(fp
, &cpu_jif
[i
]);
262 static void do_stats(void)
267 struct save_hist
*new_hist
;
272 new_hist
= xmalloc(sizeof(new_hist
[0]) * ntop
);
274 * Make a pass through the data to get stats.
276 /* hist_iterations = 0; */
278 for (n
= 0; n
< ntop
; n
++) {
282 * Calculate time in cur process. Time is sum of user time
286 new_hist
[n
].ticks
= cur
->ticks
;
287 new_hist
[n
].pid
= pid
;
289 /* find matching entry from previous pass */
291 /* do not start at index 0, continue at last used one
292 * (brought hist_iterations from ~14000 down to 172) */
294 if (prev_hist_count
) do {
295 if (prev_hist
[i
].pid
== pid
) {
296 cur
->pcpu
= cur
->ticks
- prev_hist
[i
].ticks
;
297 total_pcpu
+= cur
->pcpu
;
300 i
= (i
+1) % prev_hist_count
;
301 /* hist_iterations++; */
302 } while (i
!= last_i
);
303 /* total_vsz += cur->vsz; */
307 * Save cur frame's information.
310 prev_hist
= new_hist
;
311 prev_hist_count
= ntop
;
314 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
316 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
317 /* formats 7 char string (8 with terminating NUL) */
318 static char *fmt_100percent_8(char pbuf
[8], unsigned value
, unsigned total
)
321 if (value
>= total
) { /* 100% ? */
322 strcpy(pbuf
, " 100% ");
325 /* else generate " [N/space]N.N% " string */
326 value
= 1000 * value
/ total
;
330 pbuf
[1] = t
? t
+ '0' : ' ';
331 pbuf
[2] = '0' + (value
/ 10);
333 pbuf
[4] = '0' + (value
% 10);
341 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
342 static void display_cpus(int scr_width
, char *scrbuf
, int *lines_rem_p
)
345 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
348 jiffy_counts_t
*p_jif
, *p_prev_jif
;
351 #if ENABLE_FEATURE_TOP_SMP_CPU
355 /* using (unsigned) casts to make operations cheaper */
356 #define CALC_TOT_DIFF ((unsigned)(p_jif->total - p_prev_jif->total) ? : 1)
358 #if ENABLE_FEATURE_TOP_DECIMALS
359 #define CALC_STAT(xxx) char xxx[8]
360 #define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
363 #define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
364 #define SHOW_STAT(xxx) xxx
368 #if !ENABLE_FEATURE_TOP_SMP_CPU
372 p_prev_jif
= &prev_jif
;
374 /* Loop thru CPU(s) */
375 n_cpu_lines
= smp_cpu_info
? num_cpus
: 1;
376 if (n_cpu_lines
> *lines_rem_p
)
377 n_cpu_lines
= *lines_rem_p
;
379 for (i
= 0; i
< n_cpu_lines
; i
++) {
381 p_prev_jif
= &cpu_prev_jif
[i
];
383 total_diff
= CALC_TOT_DIFF
;
385 { /* Need a block: CALC_STAT are declarations */
393 /*CALC_STAT(steal);*/
395 snprintf(scrbuf
, scr_width
,
396 /* Barely fits in 79 chars when in "decimals" mode. */
397 #if ENABLE_FEATURE_TOP_SMP_CPU
398 "CPU%s:"FMT
"usr"FMT
"sys"FMT
"nic"FMT
"idle"FMT
"io"FMT
"irq"FMT
"sirq",
399 (smp_cpu_info
? utoa(i
) : ""),
401 "CPU:"FMT
"usr"FMT
"sys"FMT
"nic"FMT
"idle"FMT
"io"FMT
"irq"FMT
"sirq",
403 SHOW_STAT(usr
), SHOW_STAT(sys
), SHOW_STAT(nic
), SHOW_STAT(idle
),
404 SHOW_STAT(iowait
), SHOW_STAT(irq
), SHOW_STAT(softirq
)
405 /*, SHOW_STAT(steal) - what is this 'steal' thing? */
406 /* I doubt anyone wants to know it */
416 #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
417 #define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
420 static unsigned long display_header(int scr_width
, int *lines_rem_p
)
425 unsigned long total
, used
, mfree
, shared
, buffers
, cached
;
427 /* read memory info */
428 fp
= xfopen_for_read("meminfo");
431 * Old kernels (such as 2.4.x) had a nice summary of memory info that
432 * we could parse, however this is gone entirely in 2.6. Try parsing
433 * the old way first, and if that fails, parse each field manually.
435 * First, we read in the first line. Old kernels will have bogus
436 * strings we don't care about, whereas new kernels will start right
440 if (fscanf(fp
, "MemTotal: %lu %s\n", &total
, buf
) != 2) {
441 fgets(buf
, sizeof(buf
), fp
); /* skip first line */
443 fscanf(fp
, "Mem: %lu %lu %lu %lu %lu %lu",
444 &total
, &used
, &mfree
, &shared
, &buffers
, &cached
);
445 /* convert to kilobytes */
454 * Revert to manual parsing, which incidentally already has the
455 * sizes in kilobytes. This should be safe for both 2.4 and
458 fscanf(fp
, "MemFree: %lu %s\n", &mfree
, buf
);
461 * MemShared: is no longer present in 2.6. Report this as 0,
462 * to maintain consistent behavior with normal procps.
464 if (fscanf(fp
, "MemShared: %lu %s\n", &shared
, buf
) != 2)
467 fscanf(fp
, "Buffers: %lu %s\n", &buffers
, buf
);
468 fscanf(fp
, "Cached: %lu %s\n", &cached
, buf
);
470 used
= total
- mfree
;
474 /* output memory info */
475 if (scr_width
> (int)sizeof(scrbuf
))
476 scr_width
= sizeof(scrbuf
);
477 snprintf(scrbuf
, scr_width
,
478 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
479 used
, mfree
, shared
, buffers
, cached
);
480 /* clear screen & go to top */
481 printf(OPT_BATCH_MODE
? "%s\n" : "\e[H\e[J%s\n", scrbuf
);
484 /* Display CPU time split as percentage of total time
485 * This displays either a cumulative line or one line per CPU
487 display_cpus(scr_width
, scrbuf
, lines_rem_p
);
489 /* read load average as a string */
491 open_read_close("loadavg", buf
, sizeof(buf
) - 1);
492 buf
[sizeof(buf
) - 1] = '\n';
493 *strchr(buf
, '\n') = '\0';
494 snprintf(scrbuf
, scr_width
, "Load average: %s", buf
);
501 static NOINLINE
void display_process_list(int lines_rem
, int scr_width
)
504 BITS_PER_INT
= sizeof(int) * 8
509 unsigned long total_memory
= display_header(scr_width
, &lines_rem
); /* or use total_vsz? */
510 /* xxx_shift and xxx_scale variables allow us to replace
511 * expensive divides with multiply and shift */
512 unsigned pmem_shift
, pmem_scale
, pmem_half
;
513 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
514 unsigned pcpu_shift
, pcpu_scale
, pcpu_half
;
518 /* what info of the processes is shown */
519 printf(OPT_BATCH_MODE
? "%.*s" : "\e[7m%.*s\e[0m", scr_width
,
520 " PID PPID USER STAT VSZ %MEM"
521 #if ENABLE_FEATURE_TOP_SMP_PROCESS
524 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
530 #if ENABLE_FEATURE_TOP_DECIMALS
532 #define CALC_STAT(name, val) div_t name = div((val), 10)
533 #define SHOW_STAT(name) name.quot, '0'+name.rem
537 #define CALC_STAT(name, val) unsigned name = (val)
538 #define SHOW_STAT(name) name
542 * MEM% = s->vsz/MemTotal
544 pmem_shift
= BITS_PER_INT
-11;
545 pmem_scale
= UPSCALE
*(1U<<(BITS_PER_INT
-11)) / total_memory
;
546 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
547 while (pmem_scale
>= 512) {
551 pmem_half
= (1U << pmem_shift
) / (ENABLE_FEATURE_TOP_DECIMALS
? 20 : 2);
552 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
553 busy_jifs
= cur_jif
.busy
- prev_jif
.busy
;
554 /* This happens if there were lots of short-lived processes
555 * between two top updates (e.g. compilation) */
556 if (total_pcpu
< busy_jifs
) total_pcpu
= busy_jifs
;
559 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
560 * (pcpu is delta of sys+user time between samples)
562 /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
563 * in 0..~64000 range (HZ*update_interval).
564 * we assume that unsigned is at least 32-bit.
567 pcpu_scale
= (UPSCALE
*64 * (uint16_t)busy_jifs
? : 1);
568 while (pcpu_scale
< (1U << (BITS_PER_INT
-2))) {
572 pcpu_scale
/= ( (uint16_t)(cur_jif
.total
- prev_jif
.total
) * total_pcpu
? : 1);
573 /* we want (s->pcpu * pcpu_scale) to never overflow */
574 while (pcpu_scale
>= 1024) {
578 pcpu_half
= (1U << pcpu_shift
) / (ENABLE_FEATURE_TOP_DECIMALS
? 20 : 2);
579 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
582 /* Ok, all preliminary data is ready, go through the list */
583 scr_width
+= 2; /* account for leading '\n' and trailing NUL */
584 if (lines_rem
> ntop
)
587 while (--lines_rem
>= 0) {
589 CALC_STAT(pmem
, (s
->vsz
*pmem_scale
+ pmem_half
) >> pmem_shift
);
590 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
591 CALC_STAT(pcpu
, (s
->pcpu
*pcpu_scale
+ pcpu_half
) >> pcpu_shift
);
594 if (s
->vsz
>= 100000)
595 sprintf(vsz_str_buf
, "%6ldm", s
->vsz
/1024);
597 sprintf(vsz_str_buf
, "%7ld", s
->vsz
);
598 /* PID PPID USER STAT VSZ %MEM [%CPU] COMMAND */
599 col
= snprintf(line_buf
, scr_width
,
600 "\n" "%5u%6u %-8.8s %s%s" FMT
601 #if ENABLE_FEATURE_TOP_SMP_PROCESS
604 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
608 s
->pid
, s
->ppid
, get_cached_username(s
->uid
),
609 s
->state
, vsz_str_buf
,
611 #if ENABLE_FEATURE_TOP_SMP_PROCESS
612 , s
->last_seen_on_cpu
614 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
618 if ((int)(col
+ 1) < scr_width
)
619 read_cmdline(line_buf
+ col
, scr_width
- col
- 1, s
->pid
, s
->comm
);
620 fputs(line_buf
, stdout
);
621 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
622 cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
625 /* printf(" %d", hist_iterations); */
626 bb_putchar(OPT_BATCH_MODE
? '\n' : '\r');
634 static void clearmems(void)
636 clear_username_cache();
642 #if ENABLE_FEATURE_USE_TERMIOS
644 static void reset_term(void)
646 tcsetattr_stdin_TCSANOW(&initial_settings
);
647 if (ENABLE_FEATURE_CLEAN_UP
) {
649 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
655 static void sig_catcher(int sig UNUSED_PARAM
)
660 #endif /* FEATURE_USE_TERMIOS */
666 typedef unsigned long mem_t
;
668 typedef struct topmem_status_t
{
671 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
681 enum { NUM_SORT_FIELD
= 7 };
683 #define topmem ((topmem_status_t*)top)
685 #if ENABLE_FEATURE_TOPMEM
687 static int topmem_sort(char *a
, char *b
)
692 n
= offsetof(topmem_status_t
, vsz
) + (sort_field
* sizeof(mem_t
));
693 l
= *(mem_t
*)(a
+ n
);
694 r
= *(mem_t
*)(b
+ n
);
699 /* We want to avoid unsigned->signed and truncation errors */
700 /* l>r: -1, l=r: 0, l<r: 1 */
701 n
= (l
> r
) ? -1 : (l
!= r
);
702 return inverted
? -n
: n
;
705 /* Cut "NNNN " out of " NNNN kb" */
706 static char *grab_number(char *str
, const char *match
, unsigned sz
)
708 if (strncmp(str
, match
, sz
) == 0) {
709 str
= skip_whitespace(str
+ sz
);
710 (skip_non_whitespace(str
))[1] = '\0';
716 /* display header info (meminfo / loadavg) */
717 static void display_topmem_header(int scr_width
, int *lines_rem_p
)
728 /* 5 */ char *swaptotal
;
729 /* 6 */ char *swapfree
;
731 /* 8 */ char *mwrite
;
738 #define total Z.u.total
739 #define mfree Z.u.mfree
741 #define cache Z.u.cache
742 #define swaptotal Z.u.swaptotal
743 #define swapfree Z.u.swapfree
744 #define dirty Z.u.dirty
745 #define mwrite Z.u.mwrite
746 #define anon Z.u.anon
748 #define slab Z.u.slab
751 memset(&Z
, 0, sizeof(Z
));
753 /* read memory info */
754 fp
= xfopen_for_read("meminfo");
755 while (fgets(linebuf
, sizeof(linebuf
), fp
)) {
758 #define SCAN(match, name) \
759 p = grab_number(linebuf, match, sizeof(match)-1); \
760 if (p) { name = p; continue; }
762 SCAN("MemTotal:", total
);
763 SCAN("MemFree:", mfree
);
764 SCAN("Buffers:", buf
);
765 SCAN("Cached:", cache
);
766 SCAN("SwapTotal:", swaptotal
);
767 SCAN("SwapFree:", swapfree
);
768 SCAN("Dirty:", dirty
);
769 SCAN("Writeback:", mwrite
);
770 SCAN("AnonPages:", anon
);
771 SCAN("Mapped:", map
);
777 #define S(s) (s ? s : "0 ")
778 snprintf(linebuf
, sizeof(linebuf
),
779 "Mem %stotal %sanon %smap %sfree",
780 S(total
), S(anon
), S(map
), S(mfree
));
781 printf(OPT_BATCH_MODE
? "%.*s\n" : "\e[H\e[J%.*s\n", scr_width
, linebuf
);
783 snprintf(linebuf
, sizeof(linebuf
),
784 " %sslab %sbuf %scache %sdirty %swrite",
785 S(slab
), S(buf
), S(cache
), S(dirty
), S(mwrite
));
786 printf("%.*s\n", scr_width
, linebuf
);
788 snprintf(linebuf
, sizeof(linebuf
),
789 "Swap %stotal %sfree", // TODO: % used?
790 S(swaptotal
), S(swapfree
));
791 printf("%.*s\n", scr_width
, linebuf
);
796 for (i
= 0; i
< ARRAY_SIZE(str
); i
++)
812 static void ulltoa6_and_space(unsigned long long ul
, char buf
[6])
814 /* see http://en.wikipedia.org/wiki/Tera */
815 smart_ulltoa5(ul
, buf
, " mgtpezy");
819 static NOINLINE
void display_topmem_process_list(int lines_rem
, int scr_width
)
821 #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
822 #define MIN_WIDTH sizeof(HDR_STR)
823 const topmem_status_t
*s
= topmem
;
825 display_topmem_header(scr_width
, &lines_rem
);
826 strcpy(line_buf
, HDR_STR
" COMMAND");
827 line_buf
[5 + sort_field
* 6] = '*';
828 printf(OPT_BATCH_MODE
? "%.*s" : "\e[7m%.*s\e[0m", scr_width
, line_buf
);
831 if (lines_rem
> ntop
)
833 while (--lines_rem
>= 0) {
834 /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
835 ulltoa6_and_space(s
->pid
, &line_buf
[0*6]);
836 ulltoa6_and_space(s
->vsz
, &line_buf
[1*6]);
837 ulltoa6_and_space(s
->vszrw
, &line_buf
[2*6]);
838 ulltoa6_and_space(s
->rss
, &line_buf
[3*6]);
839 ulltoa6_and_space(s
->rss_sh
, &line_buf
[4*6]);
840 ulltoa6_and_space(s
->dirty
, &line_buf
[5*6]);
841 ulltoa6_and_space(s
->dirty_sh
, &line_buf
[6*6]);
842 ulltoa6_and_space(s
->stack
, &line_buf
[7*6]);
843 line_buf
[8*6] = '\0';
844 if (scr_width
> (int)MIN_WIDTH
) {
845 read_cmdline(&line_buf
[8*6], scr_width
- MIN_WIDTH
, s
->pid
, s
->comm
);
847 printf("\n""%.*s", scr_width
, line_buf
);
850 bb_putchar(OPT_BATCH_MODE
? '\n' : '\r');
857 void display_topmem_process_list(int lines_rem
, int scr_width
);
858 int topmem_sort(char *a
, char *b
);
874 #if ENABLE_FEATURE_TOP_SMP_PROCESS
884 int top_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
885 int top_main(int argc UNUSED_PARAM
, char **argv
)
891 char *str_interval
, *str_iterations
;
892 SKIP_FEATURE_TOPMEM(const) unsigned scan_mask
= TOP_MASK
;
893 #if ENABLE_FEATURE_USE_TERMIOS
894 struct termios new_settings
;
895 struct pollfd pfd
[1];
899 pfd
[0].events
= POLLIN
;
900 #endif /* FEATURE_USE_TERMIOS */
904 interval
= 5; /* default update interval is 5 seconds */
905 iterations
= 0; /* infinite */
906 #if ENABLE_FEATURE_TOP_SMP_CPU
908 /*smp_cpu_info = 0;*/ /* to start with show aggregate */
910 cpu_prev_jif
= &prev_jif
;
913 /* all args are options; -n NUM */
914 opt_complementary
= "-";
915 col
= getopt32(argv
, "d:n:b", &str_interval
, &str_iterations
);
917 /* work around for "-d 1" -> "-d -1" done by getopt32 */
918 if (str_interval
[0] == '-')
920 /* Need to limit it to not overflow poll timeout */
921 interval
= xatou16(str_interval
);
924 if (str_iterations
[0] == '-')
926 iterations
= xatou(str_iterations
);
929 /* change to /proc */
931 #if ENABLE_FEATURE_USE_TERMIOS
932 tcgetattr(0, (void *) &initial_settings
);
933 memcpy(&new_settings
, &initial_settings
, sizeof(new_settings
));
934 /* unbuffered input, turn off echo */
935 new_settings
.c_lflag
&= ~(ISIG
| ICANON
| ECHO
| ECHONL
);
937 bb_signals(BB_FATAL_SIGS
, sig_catcher
);
938 tcsetattr_stdin_TCSANOW(&new_settings
);
939 #endif /* FEATURE_USE_TERMIOS */
941 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
942 sort_function
[0] = pcpu_sort
;
943 sort_function
[1] = mem_sort
;
944 sort_function
[2] = time_sort
;
946 sort_function
[0] = mem_sort
;
947 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
950 procps_status_t
*p
= NULL
;
952 lines
= 24; /* default */
954 #if ENABLE_FEATURE_USE_TERMIOS
955 /* We output to stdout, we need size of stdout (not stdin)! */
956 get_terminal_width_height(STDOUT_FILENO
, &col
, &lines
);
957 if (lines
< 5 || col
< 10) {
961 #endif /* FEATURE_USE_TERMIOS */
962 if (col
> LINE_BUF_SIZE
-2) /* +2 bytes for '\n', NUL, */
963 col
= LINE_BUF_SIZE
-2;
965 /* read process IDs & status for all the processes */
966 while ((p
= procps_scan(p
, scan_mask
)) != NULL
) {
968 if (scan_mask
== TOP_MASK
) {
970 top
= xrealloc_vector(top
, 6, ntop
++);
972 top
[n
].ppid
= p
->ppid
;
974 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
975 top
[n
].ticks
= p
->stime
+ p
->utime
;
978 strcpy(top
[n
].state
, p
->state
);
979 strcpy(top
[n
].comm
, p
->comm
);
980 #if ENABLE_FEATURE_TOP_SMP_PROCESS
981 top
[n
].last_seen_on_cpu
= p
->last_seen_on_cpu
;
983 } else { /* TOPMEM */
984 #if ENABLE_FEATURE_TOPMEM
985 if (!(p
->mapped_ro
| p
->mapped_rw
))
986 continue; /* kernel threads are ignored */
988 /* No bug here - top and topmem are the same */
989 top
= xrealloc_vector(topmem
, 6, ntop
++);
990 strcpy(topmem
[n
].comm
, p
->comm
);
991 topmem
[n
].pid
= p
->pid
;
992 topmem
[n
].vsz
= p
->mapped_rw
+ p
->mapped_ro
;
993 topmem
[n
].vszrw
= p
->mapped_rw
;
994 topmem
[n
].rss_sh
= p
->shared_clean
+ p
->shared_dirty
;
995 topmem
[n
].rss
= p
->private_clean
+ p
->private_dirty
+ topmem
[n
].rss_sh
;
996 topmem
[n
].dirty
= p
->private_dirty
+ p
->shared_dirty
;
997 topmem
[n
].dirty_sh
= p
->shared_dirty
;
998 topmem
[n
].stack
= p
->stack
;
1001 } /* end of "while we read /proc" */
1003 bb_error_msg("no process info in /proc");
1007 if (scan_mask
== TOP_MASK
) {
1008 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1009 if (!prev_hist_count
) {
1016 /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
1017 qsort(top
, ntop
, sizeof(top_status_t
), (void*)mult_lvl_cmp
);
1019 qsort(top
, ntop
, sizeof(top_status_t
), (void*)(sort_function
[0]));
1020 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
1022 #if ENABLE_FEATURE_TOPMEM
1024 qsort(topmem
, ntop
, sizeof(topmem_status_t
), (void*)topmem_sort
);
1028 if (OPT_BATCH_MODE
) {
1029 lines_rem
= INT_MAX
;
1031 if (scan_mask
== TOP_MASK
)
1032 display_process_list(lines_rem
, col
);
1033 #if ENABLE_FEATURE_TOPMEM
1035 display_topmem_process_list(lines_rem
, col
);
1038 if (iterations
>= 0 && !--iterations
)
1040 #if !ENABLE_FEATURE_USE_TERMIOS
1043 if (option_mask32
& (OPT_b
|OPT_EOF
))
1044 /* batch mode, or EOF on stdin ("top </dev/null") */
1046 else if (safe_poll(pfd
, 1, interval
* 1000) > 0) {
1047 if (safe_read(STDIN_FILENO
, &c
, 1) != 1) { /* error/EOF? */
1048 option_mask32
|= OPT_EOF
;
1051 if (c
== initial_settings
.c_cc
[VINTR
])
1053 c
|= 0x20; /* lowercase */
1057 USE_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
1058 sort_function
[0] = pid_sort
;
1061 USE_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
1062 sort_function
[0] = mem_sort
;
1063 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1064 sort_function
[1] = pcpu_sort
;
1065 sort_function
[2] = time_sort
;
1068 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1070 USE_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
1071 sort_function
[0] = pcpu_sort
;
1072 sort_function
[1] = mem_sort
;
1073 sort_function
[2] = time_sort
;
1076 USE_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
1077 sort_function
[0] = time_sort
;
1078 sort_function
[1] = mem_sort
;
1079 sort_function
[2] = pcpu_sort
;
1081 #if ENABLE_FEATURE_TOPMEM
1083 scan_mask
= TOPMEM_MASK
;
1086 prev_hist_count
= 0;
1087 sort_field
= (sort_field
+ 1) % NUM_SORT_FIELD
;
1092 #if ENABLE_FEATURE_TOP_SMP_CPU
1093 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
1094 if (c
== 'c' || c
== '1') {
1095 /* User wants to toggle per cpu <> aggregate */
1100 cpu_prev_jif
= &prev_jif
;
1102 /* Prepare for xrealloc() */
1103 cpu_jif
= cpu_prev_jif
= NULL
;
1106 smp_cpu_info
= !smp_cpu_info
;
1112 #endif /* FEATURE_USE_TERMIOS */
1113 } /* end of "while (1)" */
1116 #if ENABLE_FEATURE_USE_TERMIOS
1119 return EXIT_SUCCESS
;