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 typedef struct top_status_t
{
58 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
60 unsigned pcpu
; /* delta of ticks */
66 #if ENABLE_FEATURE_TOP_SMP_PROCESS
71 typedef struct jiffy_counts_t
{
72 /* Linux 2.4.x has only first four */
73 unsigned long long usr
, nic
, sys
, idle
;
74 unsigned long long iowait
, irq
, softirq
, steal
;
75 unsigned long long total
;
76 unsigned long long busy
;
79 /* This structure stores some critical information from one frame to
80 the next. Used for finding deltas. */
81 typedef struct save_hist
{
86 typedef int (*cmp_funcp
)(top_status_t
*P
, top_status_t
*Q
);
89 enum { SORT_DEPTH
= 3 };
96 #if ENABLE_FEATURE_TOPMEM
99 #if ENABLE_FEATURE_TOP_SMP_CPU
100 smallint smp_cpu_info
; /* one/many cpu info lines? */
102 #if ENABLE_FEATURE_USE_TERMIOS
103 struct termios initial_settings
;
105 #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
106 cmp_funcp sort_function
[1];
108 cmp_funcp sort_function
[SORT_DEPTH
];
109 struct save_hist
*prev_hist
;
111 jiffy_counts_t cur_jif
, prev_jif
;
112 /* int hist_iterations; */
114 /* unsigned long total_vsz; */
116 #if ENABLE_FEATURE_TOP_SMP_CPU
117 /* Per CPU samples: current and last */
118 jiffy_counts_t
*cpu_jif
, *cpu_prev_jif
;
122 }; //FIX_ALIASING; - large code growth
123 enum { LINE_BUF_SIZE
= COMMON_BUFSIZE
- offsetof(struct globals
, line_buf
) };
124 #define G (*(struct globals*)&bb_common_bufsiz1)
125 struct BUG_bad_size
{
126 char BUG_G_too_big
[sizeof(G
) <= COMMON_BUFSIZE
? 1 : -1];
127 char BUG_line_buf_too_small
[LINE_BUF_SIZE
> 80 ? 1 : -1];
130 #define ntop (G.ntop )
131 #define sort_field (G.sort_field )
132 #define inverted (G.inverted )
133 #define smp_cpu_info (G.smp_cpu_info )
134 #define initial_settings (G.initial_settings )
135 #define sort_function (G.sort_function )
136 #define prev_hist (G.prev_hist )
137 #define prev_hist_count (G.prev_hist_count )
138 #define cur_jif (G.cur_jif )
139 #define prev_jif (G.prev_jif )
140 #define cpu_jif (G.cpu_jif )
141 #define cpu_prev_jif (G.cpu_prev_jif )
142 #define num_cpus (G.num_cpus )
143 #define total_pcpu (G.total_pcpu )
144 #define line_buf (G.line_buf )
145 #define INIT_G() do { } while (0)
152 OPT_EOF
= (1 << 4), /* pseudo: "we saw EOF in stdin" */
154 #define OPT_BATCH_MODE (option_mask32 & OPT_b)
157 #if ENABLE_FEATURE_USE_TERMIOS
158 static int pid_sort(top_status_t
*P
, top_status_t
*Q
)
160 /* Buggy wrt pids with high bit set */
161 /* (linux pids are in [1..2^15-1]) */
162 return (Q
->pid
- P
->pid
);
166 static int mem_sort(top_status_t
*P
, top_status_t
*Q
)
168 /* We want to avoid unsigned->signed and truncation errors */
169 if (Q
->vsz
< P
->vsz
) return -1;
170 return Q
->vsz
!= P
->vsz
; /* 0 if ==, 1 if > */
174 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
176 static int pcpu_sort(top_status_t
*P
, top_status_t
*Q
)
178 /* Buggy wrt ticks with high bit set */
179 /* Affects only processes for which ticks overflow */
180 return (int)Q
->pcpu
- (int)P
->pcpu
;
183 static int time_sort(top_status_t
*P
, top_status_t
*Q
)
185 /* We want to avoid unsigned->signed and truncation errors */
186 if (Q
->ticks
< P
->ticks
) return -1;
187 return Q
->ticks
!= P
->ticks
; /* 0 if ==, 1 if > */
190 static int mult_lvl_cmp(void* a
, void* b
)
194 for (i
= 0; i
< SORT_DEPTH
; i
++) {
195 cmp_val
= (*sort_function
[i
])(a
, b
);
199 return inverted
? -cmp_val
: cmp_val
;
202 static NOINLINE
int read_cpu_jiffy(FILE *fp
, jiffy_counts_t
*p_jif
)
204 #if !ENABLE_FEATURE_TOP_SMP_CPU
205 static const char fmt
[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
207 static const char fmt
[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
211 if (!fgets(line_buf
, LINE_BUF_SIZE
, fp
) || line_buf
[0] != 'c' /* not "cpu" */)
213 ret
= sscanf(line_buf
, fmt
,
214 &p_jif
->usr
, &p_jif
->nic
, &p_jif
->sys
, &p_jif
->idle
,
215 &p_jif
->iowait
, &p_jif
->irq
, &p_jif
->softirq
,
218 p_jif
->total
= p_jif
->usr
+ p_jif
->nic
+ p_jif
->sys
+ p_jif
->idle
219 + p_jif
->iowait
+ p_jif
->irq
+ p_jif
->softirq
+ p_jif
->steal
;
220 /* procps 2.x does not count iowait as busy time */
221 p_jif
->busy
= p_jif
->total
- p_jif
->idle
- p_jif
->iowait
;
227 static void get_jiffy_counts(void)
229 FILE* fp
= xfopen_for_read("stat");
231 /* We need to parse cumulative counts even if SMP CPU display is on,
232 * they are used to calculate per process CPU% */
234 if (read_cpu_jiffy(fp
, &cur_jif
) < 4)
235 bb_error_msg_and_die("can't read /proc/stat");
237 #if !ENABLE_FEATURE_TOP_SMP_CPU
247 /* First time here. How many CPUs?
248 * There will be at least 1 /proc/stat line with cpu%d
251 cpu_jif
= xrealloc_vector(cpu_jif
, 1, num_cpus
);
252 if (read_cpu_jiffy(fp
, &cpu_jif
[num_cpus
]) <= 4)
256 if (num_cpus
== 0) /* /proc/stat with only "cpu ..." line?! */
259 cpu_prev_jif
= xzalloc(sizeof(cpu_prev_jif
[0]) * num_cpus
);
261 /* Otherwise the first per cpu display shows all 100% idles */
263 } else { /* Non first time invocation */
267 /* First switch the sample pointers: no need to copy */
269 cpu_prev_jif
= cpu_jif
;
272 /* Get the new samples */
273 for (i
= 0; i
< num_cpus
; i
++)
274 read_cpu_jiffy(fp
, &cpu_jif
[i
]);
280 static void do_stats(void)
285 struct save_hist
*new_hist
;
290 new_hist
= xmalloc(sizeof(new_hist
[0]) * ntop
);
292 * Make a pass through the data to get stats.
294 /* hist_iterations = 0; */
296 for (n
= 0; n
< ntop
; n
++) {
300 * Calculate time in cur process. Time is sum of user time
304 new_hist
[n
].ticks
= cur
->ticks
;
305 new_hist
[n
].pid
= pid
;
307 /* find matching entry from previous pass */
309 /* do not start at index 0, continue at last used one
310 * (brought hist_iterations from ~14000 down to 172) */
312 if (prev_hist_count
) do {
313 if (prev_hist
[i
].pid
== pid
) {
314 cur
->pcpu
= cur
->ticks
- prev_hist
[i
].ticks
;
315 total_pcpu
+= cur
->pcpu
;
318 i
= (i
+1) % prev_hist_count
;
319 /* hist_iterations++; */
320 } while (i
!= last_i
);
321 /* total_vsz += cur->vsz; */
325 * Save cur frame's information.
328 prev_hist
= new_hist
;
329 prev_hist_count
= ntop
;
332 #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
334 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
335 /* formats 7 char string (8 with terminating NUL) */
336 static char *fmt_100percent_8(char pbuf
[8], unsigned value
, unsigned total
)
339 if (value
>= total
) { /* 100% ? */
340 strcpy(pbuf
, " 100% ");
343 /* else generate " [N/space]N.N% " string */
344 value
= 1000 * value
/ total
;
348 pbuf
[1] = t
? t
+ '0' : ' ';
349 pbuf
[2] = '0' + (value
/ 10);
351 pbuf
[4] = '0' + (value
% 10);
359 #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
360 static void display_cpus(int scr_width
, char *scrbuf
, int *lines_rem_p
)
363 * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
366 jiffy_counts_t
*p_jif
, *p_prev_jif
;
368 # if ENABLE_FEATURE_TOP_SMP_CPU
372 /* using (unsigned) casts to make operations cheaper */
373 # define CALC_TOTAL_DIFF do { \
374 total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
375 if (total_diff == 0) total_diff = 1; \
378 # if ENABLE_FEATURE_TOP_DECIMALS
379 # define CALC_STAT(xxx) char xxx[8]
380 # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
383 # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
384 # define SHOW_STAT(xxx) xxx
385 # define FMT "%4u%% "
388 # if !ENABLE_FEATURE_TOP_SMP_CPU
392 p_prev_jif
= &prev_jif
;
394 /* Loop thru CPU(s) */
395 n_cpu_lines
= smp_cpu_info
? num_cpus
: 1;
396 if (n_cpu_lines
> *lines_rem_p
)
397 n_cpu_lines
= *lines_rem_p
;
399 for (i
= 0; i
< n_cpu_lines
; i
++) {
401 p_prev_jif
= &cpu_prev_jif
[i
];
405 { /* Need a block: CALC_STAT are declarations */
413 /*CALC_STAT(steal);*/
415 snprintf(scrbuf
, scr_width
,
416 /* Barely fits in 79 chars when in "decimals" mode. */
417 # if ENABLE_FEATURE_TOP_SMP_CPU
418 "CPU%s:"FMT
"usr"FMT
"sys"FMT
"nic"FMT
"idle"FMT
"io"FMT
"irq"FMT
"sirq",
419 (smp_cpu_info
? utoa(i
) : ""),
421 "CPU:"FMT
"usr"FMT
"sys"FMT
"nic"FMT
"idle"FMT
"io"FMT
"irq"FMT
"sirq",
423 SHOW_STAT(usr
), SHOW_STAT(sys
), SHOW_STAT(nic
), SHOW_STAT(idle
),
424 SHOW_STAT(iowait
), SHOW_STAT(irq
), SHOW_STAT(softirq
)
425 /*, SHOW_STAT(steal) - what is this 'steal' thing? */
426 /* I doubt anyone wants to know it */
436 #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
437 # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
440 static unsigned long display_header(int scr_width
, int *lines_rem_p
)
445 unsigned long total
, used
, mfree
, shared
, buffers
, cached
;
447 /* read memory info */
448 fp
= xfopen_for_read("meminfo");
451 * Old kernels (such as 2.4.x) had a nice summary of memory info that
452 * we could parse, however this is gone entirely in 2.6. Try parsing
453 * the old way first, and if that fails, parse each field manually.
455 * First, we read in the first line. Old kernels will have bogus
456 * strings we don't care about, whereas new kernels will start right
460 if (fscanf(fp
, "MemTotal: %lu %s\n", &total
, buf
) != 2) {
461 fgets(buf
, sizeof(buf
), fp
); /* skip first line */
463 fscanf(fp
, "Mem: %lu %lu %lu %lu %lu %lu",
464 &total
, &used
, &mfree
, &shared
, &buffers
, &cached
);
465 /* convert to kilobytes */
474 * Revert to manual parsing, which incidentally already has the
475 * sizes in kilobytes. This should be safe for both 2.4 and
478 fscanf(fp
, "MemFree: %lu %s\n", &mfree
, buf
);
481 * MemShared: is no longer present in 2.6. Report this as 0,
482 * to maintain consistent behavior with normal procps.
484 if (fscanf(fp
, "MemShared: %lu %s\n", &shared
, buf
) != 2)
487 fscanf(fp
, "Buffers: %lu %s\n", &buffers
, buf
);
488 fscanf(fp
, "Cached: %lu %s\n", &cached
, buf
);
490 used
= total
- mfree
;
494 /* output memory info */
495 if (scr_width
> (int)sizeof(scrbuf
))
496 scr_width
= sizeof(scrbuf
);
497 snprintf(scrbuf
, scr_width
,
498 "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
499 used
, mfree
, shared
, buffers
, cached
);
500 /* go to top & clear to the end of screen */
501 printf(OPT_BATCH_MODE
? "%s\n" : "\033[H\033[J%s\n", scrbuf
);
504 /* Display CPU time split as percentage of total time
505 * This displays either a cumulative line or one line per CPU
507 display_cpus(scr_width
, scrbuf
, lines_rem_p
);
509 /* read load average as a string */
511 open_read_close("loadavg", buf
, sizeof(buf
) - 1);
512 buf
[sizeof(buf
) - 1] = '\n';
513 *strchr(buf
, '\n') = '\0';
514 snprintf(scrbuf
, scr_width
, "Load average: %s", buf
);
521 static NOINLINE
void display_process_list(int lines_rem
, int scr_width
)
524 BITS_PER_INT
= sizeof(int) * 8
529 unsigned long total_memory
= display_header(scr_width
, &lines_rem
); /* or use total_vsz? */
530 /* xxx_shift and xxx_scale variables allow us to replace
531 * expensive divides with multiply and shift */
532 unsigned pmem_shift
, pmem_scale
, pmem_half
;
533 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
534 unsigned tmp_unsigned
;
535 unsigned pcpu_shift
, pcpu_scale
, pcpu_half
;
539 /* what info of the processes is shown */
540 printf(OPT_BATCH_MODE
? "%.*s" : "\033[7m%.*s\033[0m", scr_width
,
541 " PID PPID USER STAT VSZ %VSZ"
542 IF_FEATURE_TOP_SMP_PROCESS(" CPU")
543 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
547 #if ENABLE_FEATURE_TOP_DECIMALS
548 # define UPSCALE 1000
549 # define CALC_STAT(name, val) div_t name = div((val), 10)
550 # define SHOW_STAT(name) name.quot, '0'+name.rem
551 # define FMT "%3u.%c"
554 # define CALC_STAT(name, val) unsigned name = (val)
555 # define SHOW_STAT(name) name
559 * %VSZ = s->vsz/MemTotal
561 pmem_shift
= BITS_PER_INT
-11;
562 pmem_scale
= UPSCALE
*(1U<<(BITS_PER_INT
-11)) / total_memory
;
563 /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
564 while (pmem_scale
>= 512) {
568 pmem_half
= (1U << pmem_shift
) / (ENABLE_FEATURE_TOP_DECIMALS
? 20 : 2);
569 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
570 busy_jifs
= cur_jif
.busy
- prev_jif
.busy
;
571 /* This happens if there were lots of short-lived processes
572 * between two top updates (e.g. compilation) */
573 if (total_pcpu
< busy_jifs
) total_pcpu
= busy_jifs
;
576 * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
577 * (pcpu is delta of sys+user time between samples)
579 /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
580 * in 0..~64000 range (HZ*update_interval).
581 * we assume that unsigned is at least 32-bit.
584 pcpu_scale
= UPSCALE
*64 * (uint16_t)busy_jifs
;
587 while (pcpu_scale
< (1U << (BITS_PER_INT
-2))) {
591 tmp_unsigned
= (uint16_t)(cur_jif
.total
- prev_jif
.total
) * total_pcpu
;
592 if (tmp_unsigned
!= 0)
593 pcpu_scale
/= tmp_unsigned
;
594 /* we want (s->pcpu * pcpu_scale) to never overflow */
595 while (pcpu_scale
>= 1024) {
599 pcpu_half
= (1U << pcpu_shift
) / (ENABLE_FEATURE_TOP_DECIMALS
? 20 : 2);
600 /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
603 /* Ok, all preliminary data is ready, go through the list */
604 scr_width
+= 2; /* account for leading '\n' and trailing NUL */
605 if (lines_rem
> ntop
)
608 while (--lines_rem
>= 0) {
610 CALC_STAT(pmem
, (s
->vsz
*pmem_scale
+ pmem_half
) >> pmem_shift
);
611 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
612 CALC_STAT(pcpu
, (s
->pcpu
*pcpu_scale
+ pcpu_half
) >> pcpu_shift
);
615 if (s
->vsz
>= 100000)
616 sprintf(vsz_str_buf
, "%6ldm", s
->vsz
/1024);
618 sprintf(vsz_str_buf
, "%7ld", s
->vsz
);
619 /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
620 col
= snprintf(line_buf
, scr_width
,
621 "\n" "%5u%6u %-8.8s %s%s" FMT
622 IF_FEATURE_TOP_SMP_PROCESS(" %3d")
623 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT
)
625 s
->pid
, s
->ppid
, get_cached_username(s
->uid
),
626 s
->state
, vsz_str_buf
,
628 IF_FEATURE_TOP_SMP_PROCESS(, s
->last_seen_on_cpu
)
629 IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu
))
631 if ((int)(col
+ 1) < scr_width
)
632 read_cmdline(line_buf
+ col
, scr_width
- col
, s
->pid
, s
->comm
);
633 fputs(line_buf
, stdout
);
634 /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
635 cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
638 /* printf(" %d", hist_iterations); */
639 bb_putchar(OPT_BATCH_MODE
? '\n' : '\r');
647 static void clearmems(void)
649 clear_username_cache();
655 #if ENABLE_FEATURE_USE_TERMIOS
657 static void reset_term(void)
659 tcsetattr_stdin_TCSANOW(&initial_settings
);
660 if (ENABLE_FEATURE_CLEAN_UP
) {
662 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
668 static void sig_catcher(int sig UNUSED_PARAM
)
674 #endif /* FEATURE_USE_TERMIOS */
680 typedef unsigned long mem_t
;
682 typedef struct topmem_status_t
{
685 /* vsz doesn't count /dev/xxx mappings except /dev/zero */
695 enum { NUM_SORT_FIELD
= 7 };
697 #define topmem ((topmem_status_t*)top)
699 #if ENABLE_FEATURE_TOPMEM
701 static int topmem_sort(char *a
, char *b
)
706 n
= offsetof(topmem_status_t
, vsz
) + (sort_field
* sizeof(mem_t
));
707 l
= *(mem_t
*)(a
+ n
);
708 r
= *(mem_t
*)(b
+ n
);
710 l
= ((topmem_status_t
*)a
)->dirty
;
711 r
= ((topmem_status_t
*)b
)->dirty
;
713 /* We want to avoid unsigned->signed and truncation errors */
714 /* l>r: -1, l=r: 0, l<r: 1 */
715 n
= (l
> r
) ? -1 : (l
!= r
);
716 return inverted
? -n
: n
;
719 /* display header info (meminfo / loadavg) */
720 static void display_topmem_header(int scr_width
, int *lines_rem_p
)
723 TOTAL
= 0, MFREE
, BUF
, CACHE
,
724 SWAPTOTAL
, SWAPFREE
, DIRTY
,
725 MWRITE
, ANON
, MAP
, SLAB
,
728 static const char match
[NUM_FIELDS
][12] = {
729 "\x09" "MemTotal:", // TOTAL
730 "\x08" "MemFree:", // MFREE
731 "\x08" "Buffers:", // BUF
732 "\x07" "Cached:", // CACHE
733 "\x0a" "SwapTotal:", // SWAPTOTAL
734 "\x09" "SwapFree:", // SWAPFREE
735 "\x06" "Dirty:", // DIRTY
736 "\x0a" "Writeback:", // MWRITE
737 "\x0a" "AnonPages:", // ANON
738 "\x07" "Mapped:", // MAP
739 "\x05" "Slab:", // SLAB
741 char meminfo_buf
[4 * 1024];
742 const char *Z
[NUM_FIELDS
];
746 for (i
= 0; i
< NUM_FIELDS
; i
++)
749 /* read memory info */
750 sz
= open_read_close("meminfo", meminfo_buf
, sizeof(meminfo_buf
) - 1);
752 char *p
= meminfo_buf
;
753 meminfo_buf
[sz
] = '\0';
754 /* Note that fields always appear in the match[] order */
755 for (i
= 0; i
< NUM_FIELDS
; i
++) {
756 char *found
= strstr(p
, match
[i
] + 1);
758 /* Cut "NNNN" out of " NNNN kb" */
759 char *s
= skip_whitespace(found
+ match
[i
][0]);
760 p
= skip_non_whitespace(s
);
767 snprintf(line_buf
, LINE_BUF_SIZE
,
768 "Mem total:%s anon:%s map:%s free:%s",
769 Z
[TOTAL
], Z
[ANON
], Z
[MAP
], Z
[MFREE
]);
770 printf(OPT_BATCH_MODE
? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width
, line_buf
);
772 snprintf(line_buf
, LINE_BUF_SIZE
,
773 " slab:%s buf:%s cache:%s dirty:%s write:%s",
774 Z
[SLAB
], Z
[BUF
], Z
[CACHE
], Z
[DIRTY
], Z
[MWRITE
]);
775 printf("%.*s\n", scr_width
, line_buf
);
777 snprintf(line_buf
, LINE_BUF_SIZE
,
778 "Swap total:%s free:%s", // TODO: % used?
779 Z
[SWAPTOTAL
], Z
[SWAPFREE
]);
780 printf("%.*s\n", scr_width
, line_buf
);
785 static void ulltoa6_and_space(unsigned long long ul
, char buf
[6])
787 /* see http://en.wikipedia.org/wiki/Tera */
788 smart_ulltoa5(ul
, buf
, " mgtpezy");
792 static NOINLINE
void display_topmem_process_list(int lines_rem
, int scr_width
)
794 #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
795 #define MIN_WIDTH sizeof(HDR_STR)
796 const topmem_status_t
*s
= topmem
;
798 display_topmem_header(scr_width
, &lines_rem
);
799 strcpy(line_buf
, HDR_STR
" COMMAND");
800 line_buf
[11 + sort_field
* 6] = "^_"[inverted
];
801 printf(OPT_BATCH_MODE
? "%.*s" : "\e[7m%.*s\e[0m", scr_width
, line_buf
);
804 if (lines_rem
> ntop
)
806 while (--lines_rem
>= 0) {
807 /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
808 ulltoa6_and_space(s
->pid
, &line_buf
[0*6]);
809 ulltoa6_and_space(s
->vsz
, &line_buf
[1*6]);
810 ulltoa6_and_space(s
->vszrw
, &line_buf
[2*6]);
811 ulltoa6_and_space(s
->rss
, &line_buf
[3*6]);
812 ulltoa6_and_space(s
->rss_sh
, &line_buf
[4*6]);
813 ulltoa6_and_space(s
->dirty
, &line_buf
[5*6]);
814 ulltoa6_and_space(s
->dirty_sh
, &line_buf
[6*6]);
815 ulltoa6_and_space(s
->stack
, &line_buf
[7*6]);
816 line_buf
[8*6] = '\0';
817 if (scr_width
> (int)MIN_WIDTH
) {
818 read_cmdline(&line_buf
[8*6], scr_width
- MIN_WIDTH
, s
->pid
, s
->comm
);
820 printf("\n""%.*s", scr_width
, line_buf
);
823 bb_putchar(OPT_BATCH_MODE
? '\n' : '\r');
830 void display_topmem_process_list(int lines_rem
, int scr_width
);
831 int topmem_sort(char *a
, char *b
);
853 EXIT_MASK
= (unsigned)-1,
856 #if ENABLE_FEATURE_USE_TERMIOS
857 static unsigned handle_input(unsigned scan_mask
, unsigned interval
)
860 struct pollfd pfd
[1];
863 pfd
[0].events
= POLLIN
;
866 if (safe_poll(pfd
, 1, interval
* 1000) <= 0)
870 if (safe_read(STDIN_FILENO
, &c
, 1) != 1) { /* error/EOF? */
871 option_mask32
|= OPT_EOF
;
875 if (c
== initial_settings
.c_cc
[VINTR
])
877 if (c
== initial_settings
.c_cc
[VEOF
])
879 c
|= 0x20; /* lowercase */
884 IF_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
885 sort_function
[0] = pid_sort
;
889 IF_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
890 sort_function
[0] = mem_sort
;
891 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
892 sort_function
[1] = pcpu_sort
;
893 sort_function
[2] = time_sort
;
897 # if ENABLE_FEATURE_SHOW_THREADS
899 IF_FEATURE_TOPMEM(&& scan_mask
!= TOPMEM_MASK
)
901 scan_mask
^= PSSCAN_TASKS
;
905 # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
907 IF_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
908 sort_function
[0] = pcpu_sort
;
909 sort_function
[1] = mem_sort
;
910 sort_function
[2] = time_sort
;
914 IF_FEATURE_TOPMEM(scan_mask
= TOP_MASK
;)
915 sort_function
[0] = time_sort
;
916 sort_function
[1] = mem_sort
;
917 sort_function
[2] = pcpu_sort
;
920 # if ENABLE_FEATURE_TOPMEM
922 scan_mask
= TOPMEM_MASK
;
926 sort_field
= (sort_field
+ 1) % NUM_SORT_FIELD
;
934 # if ENABLE_FEATURE_TOP_SMP_CPU
935 /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
936 if (c
== 'c' || c
== '1') {
937 /* User wants to toggle per cpu <> aggregate */
942 cpu_prev_jif
= &prev_jif
;
944 /* Prepare for xrealloc() */
945 cpu_jif
= cpu_prev_jif
= NULL
;
948 smp_cpu_info
= !smp_cpu_info
;
954 break; /* unknown key -> force refresh */
961 //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
962 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
964 //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
966 //usage:#define top_trivial_usage
967 //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
968 //usage:#define top_full_usage "\n\n"
969 //usage: "Provide a view of process activity in real time."
970 //usage: "\n""Read the status of all processes from /proc each SECONDS"
971 //usage: "\n""and display a screenful of them."
974 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
975 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
976 //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
977 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
978 //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
979 //usage: IF_FEATURE_TOPMEM(
980 //usage: "\n"" S: show memory"
982 //usage: "\n"" R: reverse sort"
983 //usage: IF_SHOW_THREADS_OR_TOP_SMP(
985 //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
986 //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
987 //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
989 //usage: "\n"" Q,^C: exit"
991 //usage: "\n""Options:"
992 //usage: "\n"" -b Batch mode"
993 //usage: "\n"" -n N Exit after N iterations"
994 //usage: "\n"" -d N Delay between updates"
995 //usage: IF_FEATURE_TOPMEM(
996 //usage: "\n"" -m Same as 's' key"
999 /* Interactive testing:
1000 * echo sss | ./busybox top
1001 * - shows memory screen
1002 * echo sss | ./busybox top -bn1 >mem
1003 * - saves memory screen - the *whole* list, not first NROWS processes!
1004 * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
1005 * - saves several different screens, and exits
1007 * TODO: -i STRING param as a better alternative?
1010 int top_main(int argc
, char **argv
) MAIN_EXTERNALLY_VISIBLE
;
1011 int top_main(int argc UNUSED_PARAM
, char **argv
)
1014 unsigned lines
, col
;
1016 char *str_interval
, *str_iterations
;
1017 unsigned scan_mask
= TOP_MASK
;
1018 #if ENABLE_FEATURE_USE_TERMIOS
1019 struct termios new_settings
;
1024 interval
= 5; /* default update interval is 5 seconds */
1025 iterations
= 0; /* infinite */
1026 #if ENABLE_FEATURE_TOP_SMP_CPU
1028 /*smp_cpu_info = 0;*/ /* to start with show aggregate */
1030 cpu_prev_jif
= &prev_jif
;
1033 /* all args are options; -n NUM */
1034 opt_complementary
= "-"; /* options can be specified w/o dash */
1035 col
= getopt32(argv
, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval
, &str_iterations
);
1036 #if ENABLE_FEATURE_TOPMEM
1037 if (col
& OPT_m
) /* -m (busybox specific) */
1038 scan_mask
= TOPMEM_MASK
;
1041 /* work around for "-d 1" -> "-d -1" done by getopt32
1042 * (opt_complementary == "-" does this) */
1043 if (str_interval
[0] == '-')
1045 /* Need to limit it to not overflow poll timeout */
1046 interval
= xatou16(str_interval
);
1049 if (str_iterations
[0] == '-')
1051 iterations
= xatou(str_iterations
);
1054 /* change to /proc */
1057 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1058 sort_function
[0] = pcpu_sort
;
1059 sort_function
[1] = mem_sort
;
1060 sort_function
[2] = time_sort
;
1062 sort_function
[0] = mem_sort
;
1065 #if ENABLE_FEATURE_USE_TERMIOS
1066 tcgetattr(0, (void *) &initial_settings
);
1067 memcpy(&new_settings
, &initial_settings
, sizeof(new_settings
));
1068 if (!OPT_BATCH_MODE
) {
1069 /* unbuffered input, turn off echo */
1070 new_settings
.c_lflag
&= ~(ISIG
| ICANON
| ECHO
| ECHONL
);
1071 tcsetattr_stdin_TCSANOW(&new_settings
);
1074 bb_signals(BB_FATAL_SIGS
, sig_catcher
);
1076 /* Eat initial input, if any */
1077 scan_mask
= handle_input(scan_mask
, 0);
1080 while (scan_mask
!= EXIT_MASK
) {
1081 procps_status_t
*p
= NULL
;
1083 if (OPT_BATCH_MODE
) {
1085 col
= LINE_BUF_SIZE
- 2; /* +2 bytes for '\n', NUL */
1087 lines
= 24; /* default */
1089 #if ENABLE_FEATURE_USE_TERMIOS
1090 /* We output to stdout, we need size of stdout (not stdin)! */
1091 get_terminal_width_height(STDOUT_FILENO
, &col
, &lines
);
1092 if (lines
< 5 || col
< 10) {
1097 if (col
> LINE_BUF_SIZE
- 2)
1098 col
= LINE_BUF_SIZE
- 2;
1101 /* read process IDs & status for all the processes */
1102 while ((p
= procps_scan(p
, scan_mask
)) != NULL
) {
1104 #if ENABLE_FEATURE_TOPMEM
1105 if (scan_mask
!= TOPMEM_MASK
)
1109 top
= xrealloc_vector(top
, 6, ntop
++);
1110 top
[n
].pid
= p
->pid
;
1111 top
[n
].ppid
= p
->ppid
;
1112 top
[n
].vsz
= p
->vsz
;
1113 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1114 top
[n
].ticks
= p
->stime
+ p
->utime
;
1116 top
[n
].uid
= p
->uid
;
1117 strcpy(top
[n
].state
, p
->state
);
1118 strcpy(top
[n
].comm
, p
->comm
);
1119 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1120 top
[n
].last_seen_on_cpu
= p
->last_seen_on_cpu
;
1123 #if ENABLE_FEATURE_TOPMEM
1125 if (!(p
->smaps
.mapped_ro
| p
->smaps
.mapped_rw
))
1126 continue; /* kernel threads are ignored */
1128 /* No bug here - top and topmem are the same */
1129 top
= xrealloc_vector(topmem
, 6, ntop
++);
1130 strcpy(topmem
[n
].comm
, p
->comm
);
1131 topmem
[n
].pid
= p
->pid
;
1132 topmem
[n
].vsz
= p
->smaps
.mapped_rw
+ p
->smaps
.mapped_ro
;
1133 topmem
[n
].vszrw
= p
->smaps
.mapped_rw
;
1134 topmem
[n
].rss_sh
= p
->smaps
.shared_clean
+ p
->smaps
.shared_dirty
;
1135 topmem
[n
].rss
= p
->smaps
.private_clean
+ p
->smaps
.private_dirty
+ topmem
[n
].rss_sh
;
1136 topmem
[n
].dirty
= p
->smaps
.private_dirty
+ p
->smaps
.shared_dirty
;
1137 topmem
[n
].dirty_sh
= p
->smaps
.shared_dirty
;
1138 topmem
[n
].stack
= p
->smaps
.stack
;
1141 } /* end of "while we read /proc" */
1143 bb_error_msg("no process info in /proc");
1147 if (scan_mask
!= TOPMEM_MASK
) {
1148 #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
1149 if (!prev_hist_count
) {
1156 /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
1157 qsort(top
, ntop
, sizeof(top_status_t
), (void*)mult_lvl_cmp
);
1159 qsort(top
, ntop
, sizeof(top_status_t
), (void*)(sort_function
[0]));
1162 #if ENABLE_FEATURE_TOPMEM
1164 qsort(topmem
, ntop
, sizeof(topmem_status_t
), (void*)topmem_sort
);
1167 if (scan_mask
!= TOPMEM_MASK
)
1168 display_process_list(lines
, col
);
1169 #if ENABLE_FEATURE_TOPMEM
1171 display_topmem_process_list(lines
, col
);
1174 if (iterations
>= 0 && !--iterations
)
1176 #if !ENABLE_FEATURE_USE_TERMIOS
1179 if (option_mask32
& OPT_EOF
)
1180 /* EOF on stdin ("top </dev/null") */
1183 scan_mask
= handle_input(scan_mask
, interval
);
1184 #endif /* FEATURE_USE_TERMIOS */
1185 } /* end of "while (not Q)" */
1188 #if ENABLE_FEATURE_USE_TERMIOS
1191 return EXIT_SUCCESS
;