*
* This is written specifically for the linux /proc/<PID>/stat(m)
* files format.
-
+ *
* This reads the PIDs of all processes and their status and shows
* the status of processes (first ones that fit to screen) at given
* intervals.
* (C) Eero Tamminen <oak at welho dot com>
*
* Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
- */
-
-/* Original code Copyrights */
-/*
+ *
+ * Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
+ * Added Support for reporting SMP Information
+ * - CPU where process was last seen running
+ * (to see effect of sched_setaffinity() etc)
+ * - CPU time split (idle/IO/wait etc) per CPU
+ *
* Copyright (c) 1992 Branko Lankester
* Copyright (c) 1992 Roger Binns
* Copyright (C) 1994-1996 Charles L. Blake.
* Copyright (C) 1992-1998 Michael K. Johnson
- * May be distributed under the conditions of the
- * GNU Library General Public License
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
+/* How to snapshot /proc for debugging top problems:
+ * for f in /proc/[0-9]*""/stat; do
+ * n=${f#/proc/}
+ * n=${n%/stat}_stat
+ * cp $f $n
+ * done
+ * cp /proc/stat /proc/meminfo /proc/loadavg .
+ * top -bn1 >top.out
+ *
+ * ...and how to run top on it on another machine:
+ * rm -rf proc; mkdir proc
+ * for f in [0-9]*_stat; do
+ * p=${f%_stat}
+ * mkdir -p proc/$p
+ * cp $f proc/$p/stat
+ * done
+ * cp stat meminfo loadavg proc
+ * chroot . ./top -bn1 >top1.out
+ */
+
+//config:config TOP
+//config: bool "top"
+//config: default y
+//config: help
+//config: The top program provides a dynamic real-time view of a running
+//config: system.
+//config:
+//config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config: bool "Show CPU per-process usage percentage"
+//config: default y
+//config: depends on TOP
+//config: help
+//config: Make top display CPU usage for each process.
+//config: This adds about 2k.
+//config:
+//config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
+//config: bool "Show CPU global usage percentage"
+//config: default y
+//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config: help
+//config: Makes top display "CPU: NN% usr NN% sys..." line.
+//config: This adds about 0.5k.
+//config:
+//config:config FEATURE_TOP_SMP_CPU
+//config: bool "SMP CPU usage display ('c' key)"
+//config: default y
+//config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
+//config: help
+//config: Allow 'c' key to switch between individual/cumulative CPU stats
+//config: This adds about 0.5k.
+//config:
+//config:config FEATURE_TOP_DECIMALS
+//config: bool "Show 1/10th of a percent in CPU/mem statistics"
+//config: default y
+//config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
+//config: help
+//config: Show 1/10th of a percent in CPU/mem statistics.
+//config: This adds about 0.3k.
+//config:
+//config:config FEATURE_TOP_SMP_PROCESS
+//config: bool "Show CPU process runs on ('j' field)"
+//config: default y
+//config: depends on TOP
+//config: help
+//config: Show CPU where process was last found running on.
+//config: This is the 'j' field.
+//config:
+//config:config FEATURE_TOPMEM
+//config: bool "Topmem command ('s' key)"
+//config: default y
+//config: depends on TOP
+//config: help
+//config: Enable 's' in top (gives lots of memory info).
+
+#include "libbb.h"
+
+
+typedef struct top_status_t {
+ unsigned long vsz;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ unsigned long ticks;
+ unsigned pcpu; /* delta of ticks */
+#endif
+ unsigned pid, ppid;
+ unsigned uid;
+ char state[4];
+ char comm[COMM_LEN];
+#if ENABLE_FEATURE_TOP_SMP_PROCESS
+ int last_seen_on_cpu;
+#endif
+} top_status_t;
+
+typedef struct jiffy_counts_t {
+ /* Linux 2.4.x has only first four */
+ unsigned long long usr, nic, sys, idle;
+ unsigned long long iowait, irq, softirq, steal;
+ unsigned long long total;
+ unsigned long long busy;
+} jiffy_counts_t;
+
+/* This structure stores some critical information from one frame to
+ the next. Used for finding deltas. */
+typedef struct save_hist {
+ unsigned long ticks;
+ pid_t pid;
+} save_hist;
+
+typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
-#include "busybox.h"
-typedef int (*cmp_t)(procps_status_t *P, procps_status_t *Q);
+enum { SORT_DEPTH = 3 };
+
+
+struct globals {
+ top_status_t *top;
+ int ntop;
+ smallint inverted;
+#if ENABLE_FEATURE_TOPMEM
+ smallint sort_field;
+#endif
+#if ENABLE_FEATURE_TOP_SMP_CPU
+ smallint smp_cpu_info; /* one/many cpu info lines? */
+#endif
+ unsigned lines; /* screen height */
+#if ENABLE_FEATURE_USE_TERMIOS
+ struct termios initial_settings;
+ int scroll_ofs;
+#define G_scroll_ofs G.scroll_ofs
+#else
+#define G_scroll_ofs 0
+#endif
+#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ cmp_funcp sort_function[1];
+#else
+ cmp_funcp sort_function[SORT_DEPTH];
+ struct save_hist *prev_hist;
+ int prev_hist_count;
+ jiffy_counts_t cur_jif, prev_jif;
+ /* int hist_iterations; */
+ unsigned total_pcpu;
+ /* unsigned long total_vsz; */
+#endif
+#if ENABLE_FEATURE_TOP_SMP_CPU
+ /* Per CPU samples: current and last */
+ jiffy_counts_t *cpu_jif, *cpu_prev_jif;
+ int num_cpus;
+#endif
+#if ENABLE_FEATURE_USE_TERMIOS
+ char kbd_input[KEYCODE_BUFFER_SIZE];
+#endif
+ char line_buf[80];
+}; //FIX_ALIASING; - large code growth
+enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
+#define G (*(struct globals*)&bb_common_bufsiz1)
+struct BUG_bad_size {
+ char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
+ char BUG_line_buf_too_small[LINE_BUF_SIZE > 80 ? 1 : -1];
+};
+#define top (G.top )
+#define ntop (G.ntop )
+#define sort_field (G.sort_field )
+#define inverted (G.inverted )
+#define smp_cpu_info (G.smp_cpu_info )
+#define initial_settings (G.initial_settings )
+#define sort_function (G.sort_function )
+#define prev_hist (G.prev_hist )
+#define prev_hist_count (G.prev_hist_count )
+#define cur_jif (G.cur_jif )
+#define prev_jif (G.prev_jif )
+#define cpu_jif (G.cpu_jif )
+#define cpu_prev_jif (G.cpu_prev_jif )
+#define num_cpus (G.num_cpus )
+#define total_pcpu (G.total_pcpu )
+#define line_buf (G.line_buf )
+#define INIT_G() do { } while (0)
+
+enum {
+ OPT_d = (1 << 0),
+ OPT_n = (1 << 1),
+ OPT_b = (1 << 2),
+ OPT_m = (1 << 3),
+ OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
+};
+#define OPT_BATCH_MODE (option_mask32 & OPT_b)
-static procps_status_t *top; /* Hehe */
-static int ntop;
-#define OPT_BATCH_MODE (option_mask32 & 0x4)
-#ifdef CONFIG_FEATURE_USE_TERMIOS
-static int pid_sort(procps_status_t *P, procps_status_t *Q)
+#if ENABLE_FEATURE_USE_TERMIOS
+static int pid_sort(top_status_t *P, top_status_t *Q)
{
+ /* Buggy wrt pids with high bit set */
+ /* (linux pids are in [1..2^15-1]) */
return (Q->pid - P->pid);
}
#endif
-static int mem_sort(procps_status_t *P, procps_status_t *Q)
+static int mem_sort(top_status_t *P, top_status_t *Q)
{
- return (int)(Q->rss - P->rss);
+ /* We want to avoid unsigned->signed and truncation errors */
+ if (Q->vsz < P->vsz) return -1;
+ return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
}
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
-#define sort_depth 3
-static cmp_t sort_function[sort_depth];
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
-static int pcpu_sort(procps_status_t *P, procps_status_t *Q)
+static int pcpu_sort(top_status_t *P, top_status_t *Q)
{
- return (Q->pcpu - P->pcpu);
+ /* Buggy wrt ticks with high bit set */
+ /* Affects only processes for which ticks overflow */
+ return (int)Q->pcpu - (int)P->pcpu;
}
-static int time_sort(procps_status_t *P, procps_status_t *Q)
+static int time_sort(top_status_t *P, top_status_t *Q)
{
- return (int)((Q->stime + Q->utime) - (P->stime + P->utime));
+ /* We want to avoid unsigned->signed and truncation errors */
+ if (Q->ticks < P->ticks) return -1;
+ return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
}
-static int mult_lvl_cmp(void* a, void* b) {
+static int mult_lvl_cmp(void* a, void* b)
+{
int i, cmp_val;
- for (i = 0; i < sort_depth; i++) {
+ for (i = 0; i < SORT_DEPTH; i++) {
cmp_val = (*sort_function[i])(a, b);
if (cmp_val != 0)
- return cmp_val;
+ break;
}
- return 0;
+ return inverted ? -cmp_val : cmp_val;
}
-/* This structure stores some critical information from one frame to
- the next. Mostly used for sorting. */
-struct save_hist {
- int ticks;
- int pid;
-};
+static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
+{
+#if !ENABLE_FEATURE_TOP_SMP_CPU
+ static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
+#else
+ static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
+#endif
+ int ret;
-/*
- * Calculates percent cpu usage for each task.
- */
+ if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
+ return 0;
+ ret = sscanf(line_buf, fmt,
+ &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
+ &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
+ &p_jif->steal);
+ if (ret >= 4) {
+ p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
+ + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
+ /* procps 2.x does not count iowait as busy time */
+ p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
+ }
-static struct save_hist *prev_hist;
-static int prev_hist_count;
-/* static int hist_iterations; */
+ return ret;
+}
+static void get_jiffy_counts(void)
+{
+ FILE* fp = xfopen_for_read("stat");
-static unsigned total_pcpu;
-/* static unsigned long total_rss; */
+ /* We need to parse cumulative counts even if SMP CPU display is on,
+ * they are used to calculate per process CPU% */
+ prev_jif = cur_jif;
+ if (read_cpu_jiffy(fp, &cur_jif) < 4)
+ bb_error_msg_and_die("can't read '%s'", "/proc/stat");
-struct jiffy_counts {
- unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
- unsigned long long total;
- unsigned long long busy;
-};
-static struct jiffy_counts jif, prev_jif;
+#if !ENABLE_FEATURE_TOP_SMP_CPU
+ fclose(fp);
+ return;
+#else
+ if (!smp_cpu_info) {
+ fclose(fp);
+ return;
+ }
-static void get_jiffy_counts(void)
-{
- FILE* fp = xfopen("stat", "r");
- prev_jif = jif;
- if (fscanf(fp, "cpu %lld %lld %lld %lld %lld %lld %lld %lld",
- &jif.usr,&jif.nic,&jif.sys,&jif.idle,
- &jif.iowait,&jif.irq,&jif.softirq,&jif.steal) < 4) {
- bb_error_msg_and_die("failed to read /proc/stat");
+ if (!num_cpus) {
+ /* First time here. How many CPUs?
+ * There will be at least 1 /proc/stat line with cpu%d
+ */
+ while (1) {
+ cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
+ if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
+ break;
+ num_cpus++;
+ }
+ if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
+ smp_cpu_info = 0;
+
+ cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
+
+ /* Otherwise the first per cpu display shows all 100% idles */
+ usleep(50000);
+ } else { /* Non first time invocation */
+ jiffy_counts_t *tmp;
+ int i;
+
+ /* First switch the sample pointers: no need to copy */
+ tmp = cpu_prev_jif;
+ cpu_prev_jif = cpu_jif;
+ cpu_jif = tmp;
+
+ /* Get the new samples */
+ for (i = 0; i < num_cpus; i++)
+ read_cpu_jiffy(fp, &cpu_jif[i]);
}
+#endif
fclose(fp);
- jif.total = jif.usr + jif.nic + jif.sys + jif.idle
- + jif.iowait + jif.irq + jif.softirq + jif.steal;
- /* procps 2.x does not count iowait as busy time */
- jif.busy = jif.total - jif.idle - jif.iowait;
}
static void do_stats(void)
{
- procps_status_t *cur;
- int pid, total_time, i, last_i, n;
+ top_status_t *cur;
+ pid_t pid;
+ int i, last_i, n;
struct save_hist *new_hist;
get_jiffy_counts();
total_pcpu = 0;
- /* total_rss = 0; */
- new_hist = xmalloc(sizeof(struct save_hist)*ntop);
+ /* total_vsz = 0; */
+ new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
/*
* Make a pass through the data to get stats.
*/
* and system time
*/
pid = cur->pid;
- total_time = cur->stime + cur->utime;
- new_hist[n].ticks = total_time;
+ new_hist[n].ticks = cur->ticks;
new_hist[n].pid = pid;
/* find matching entry from previous pass */
last_i = i;
if (prev_hist_count) do {
if (prev_hist[i].pid == pid) {
- cur->pcpu = total_time - prev_hist[i].ticks;
+ cur->pcpu = cur->ticks - prev_hist[i].ticks;
+ total_pcpu += cur->pcpu;
break;
}
i = (i+1) % prev_hist_count;
/* hist_iterations++; */
} while (i != last_i);
- total_pcpu += cur->pcpu;
- /* total_rss += cur->rss; */
+ /* total_vsz += cur->vsz; */
}
/*
prev_hist = new_hist;
prev_hist_count = ntop;
}
-#else
-static cmp_t sort_function;
-#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
-/* display generic info (meminfo / loadavg) */
-static unsigned long display_generic(int scr_width)
+#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
+
+#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
+/* formats 7 char string (8 with terminating NUL) */
+static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
+{
+ unsigned t;
+ if (value >= total) { /* 100% ? */
+ strcpy(pbuf, " 100% ");
+ return pbuf;
+ }
+ /* else generate " [N/space]N.N% " string */
+ value = 1000 * value / total;
+ t = value / 100;
+ value = value % 100;
+ pbuf[0] = ' ';
+ pbuf[1] = t ? t + '0' : ' ';
+ pbuf[2] = '0' + (value / 10);
+ pbuf[3] = '.';
+ pbuf[4] = '0' + (value % 10);
+ pbuf[5] = '%';
+ pbuf[6] = ' ';
+ pbuf[7] = '\0';
+ return pbuf;
+}
+#endif
+
+#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
+static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
+{
+ /*
+ * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
+ */
+ unsigned total_diff;
+ jiffy_counts_t *p_jif, *p_prev_jif;
+ int i;
+# if ENABLE_FEATURE_TOP_SMP_CPU
+ int n_cpu_lines;
+# endif
+
+ /* using (unsigned) casts to make operations cheaper */
+# define CALC_TOTAL_DIFF do { \
+ total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
+ if (total_diff == 0) total_diff = 1; \
+} while (0)
+
+# if ENABLE_FEATURE_TOP_DECIMALS
+# define CALC_STAT(xxx) char xxx[8]
+# define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
+# define FMT "%s"
+# else
+# define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
+# define SHOW_STAT(xxx) xxx
+# define FMT "%4u%% "
+# endif
+
+# if !ENABLE_FEATURE_TOP_SMP_CPU
+ {
+ i = 1;
+ p_jif = &cur_jif;
+ p_prev_jif = &prev_jif;
+# else
+ /* Loop thru CPU(s) */
+ n_cpu_lines = smp_cpu_info ? num_cpus : 1;
+ if (n_cpu_lines > *lines_rem_p)
+ n_cpu_lines = *lines_rem_p;
+
+ for (i = 0; i < n_cpu_lines; i++) {
+ p_jif = &cpu_jif[i];
+ p_prev_jif = &cpu_prev_jif[i];
+# endif
+ CALC_TOTAL_DIFF;
+
+ { /* Need a block: CALC_STAT are declarations */
+ CALC_STAT(usr);
+ CALC_STAT(sys);
+ CALC_STAT(nic);
+ CALC_STAT(idle);
+ CALC_STAT(iowait);
+ CALC_STAT(irq);
+ CALC_STAT(softirq);
+ /*CALC_STAT(steal);*/
+
+ snprintf(scrbuf, scr_width,
+ /* Barely fits in 79 chars when in "decimals" mode. */
+# if ENABLE_FEATURE_TOP_SMP_CPU
+ "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
+ (smp_cpu_info ? utoa(i) : ""),
+# else
+ "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
+# endif
+ SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
+ SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
+ /*, SHOW_STAT(steal) - what is this 'steal' thing? */
+ /* I doubt anyone wants to know it */
+ );
+ puts(scrbuf);
+ }
+ }
+# undef SHOW_STAT
+# undef CALC_STAT
+# undef FMT
+ *lines_rem_p -= i;
+}
+#else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
+# define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
+#endif
+
+static unsigned long display_header(int scr_width, int *lines_rem_p)
{
FILE *fp;
char buf[80];
char scrbuf[80];
- char *end;
unsigned long total, used, mfree, shared, buffers, cached;
- unsigned int needs_conversion = 1;
/* read memory info */
- fp = xfopen("meminfo", "r");
+ fp = xfopen_for_read("meminfo");
/*
* Old kernels (such as 2.4.x) had a nice summary of memory info that
fgets(buf, sizeof(buf), fp); /* skip first line */
fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
- &total, &used, &mfree, &shared, &buffers, &cached);
+ &total, &used, &mfree, &shared, &buffers, &cached);
+ /* convert to kilobytes */
+ used /= 1024;
+ mfree /= 1024;
+ shared /= 1024;
+ buffers /= 1024;
+ cached /= 1024;
+ total /= 1024;
} else {
/*
* Revert to manual parsing, which incidentally already has the
* sizes in kilobytes. This should be safe for both 2.4 and
* 2.6.
*/
- needs_conversion = 0;
-
fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
/*
}
fclose(fp);
- /* read load average as a string */
- fp = xfopen("loadavg", "r");
- buf[0] = '\0';
- fgets(buf, sizeof(buf), fp);
- end = strchr(buf, ' ');
- if (end) end = strchr(end+1, ' ');
- if (end) end = strchr(end+1, ' ');
- if (end) *end = '\0';
- fclose(fp);
-
- if (needs_conversion) {
- /* convert to kilobytes */
- used /= 1024;
- mfree /= 1024;
- shared /= 1024;
- buffers /= 1024;
- cached /= 1024;
- total /= 1024;
- }
-
- /* output memory info and load average */
- /* clear screen & go to top */
- if (scr_width > sizeof(scrbuf))
+ /* output memory info */
+ if (scr_width > (int)sizeof(scrbuf))
scr_width = sizeof(scrbuf);
snprintf(scrbuf, scr_width,
- "Mem: %ldK used, %ldK free, %ldK shrd, %ldK buff, %ldK cached",
+ "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
used, mfree, shared, buffers, cached);
+ /* go to top & clear to the end of screen */
+ printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
+ (*lines_rem_p)--;
- printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf);
-
- snprintf(scrbuf, scr_width,
- "Load average: %s", buf);
- printf("%s\n", scrbuf);
+ /* Display CPU time split as percentage of total time
+ * This displays either a cumulative line or one line per CPU
+ */
+ display_cpus(scr_width, scrbuf, lines_rem_p);
+
+ /* read load average as a string */
+ buf[0] = '\0';
+ open_read_close("loadavg", buf, sizeof(buf) - 1);
+ buf[sizeof(buf) - 1] = '\n';
+ *strchr(buf, '\n') = '\0';
+ snprintf(scrbuf, scr_width, "Load average: %s", buf);
+ puts(scrbuf);
+ (*lines_rem_p)--;
return total;
}
-
-/* display process statuses */
-static void display_status(int count, int scr_width)
+static NOINLINE void display_process_list(int lines_rem, int scr_width)
{
enum {
- bits_per_int = sizeof(int)*8
+ BITS_PER_INT = sizeof(int) * 8
};
- procps_status_t *s = top;
- char rss_str_buf[8];
- unsigned long total_memory = display_generic(scr_width); /* or use total_rss? */
- unsigned pmem_shift, pmem_scale;
-
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- unsigned pcpu_shift, pcpu_scale;
+ top_status_t *s;
+ char vsz_str_buf[8];
+ unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
+ /* xxx_shift and xxx_scale variables allow us to replace
+ * expensive divides with multiply and shift */
+ unsigned pmem_shift, pmem_scale, pmem_half;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ unsigned tmp_unsigned;
+ unsigned pcpu_shift, pcpu_scale, pcpu_half;
+ unsigned busy_jifs;
+#endif
/* what info of the processes is shown */
- printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
- " PID USER STATUS RSS PPID %CPU %MEM COMMAND");
-#define MIN_WIDTH \
- sizeof( " PID USER STATUS RSS PPID %CPU %MEM C")
+ printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
+ " PID PPID USER STAT VSZ %VSZ"
+ IF_FEATURE_TOP_SMP_PROCESS(" CPU")
+ IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
+ " COMMAND");
+ lines_rem--;
+
+#if ENABLE_FEATURE_TOP_DECIMALS
+# define UPSCALE 1000
+# define CALC_STAT(name, val) div_t name = div((val), 10)
+# define SHOW_STAT(name) name.quot, '0'+name.rem
+# define FMT "%3u.%c"
#else
- printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width,
- " PID USER STATUS RSS PPID %MEM COMMAND");
-#define MIN_WIDTH \
- sizeof( " PID USER STATUS RSS PPID %MEM C")
+# define UPSCALE 100
+# define CALC_STAT(name, val) unsigned name = (val)
+# define SHOW_STAT(name) name
+# define FMT "%4u%%"
#endif
-
/*
- * MEM% = s->rss/MemTotal
+ * %VSZ = s->vsz/MemTotal
*/
- pmem_shift = bits_per_int-11;
- pmem_scale = 1000*(1U<<(bits_per_int-11)) / total_memory;
- /* s->rss is in kb. we want (s->rss * pmem_scale) to never overflow */
+ pmem_shift = BITS_PER_INT-11;
+ pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
+ /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
while (pmem_scale >= 512) {
pmem_scale /= 4;
pmem_shift -= 2;
}
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ busy_jifs = cur_jif.busy - prev_jif.busy;
+ /* This happens if there were lots of short-lived processes
+ * between two top updates (e.g. compilation) */
+ if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
+
/*
* CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
* (pcpu is delta of sys+user time between samples)
*/
- /* (jif.xxx - prev_jif.xxx) and s->pcpu are
+ /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
* in 0..~64000 range (HZ*update_interval).
* we assume that unsigned is at least 32-bit.
*/
pcpu_shift = 6;
- pcpu_scale = (1000*64*(uint16_t)(jif.busy-prev_jif.busy) ? : 1);
- while (pcpu_scale < (1U<<(bits_per_int-2))) {
+ pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
+ if (pcpu_scale == 0)
+ pcpu_scale = 1;
+ while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
pcpu_scale *= 4;
pcpu_shift += 2;
}
- pcpu_scale /= ( (uint16_t)(jif.total-prev_jif.total)*total_pcpu ? : 1);
+ tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
+ if (tmp_unsigned != 0)
+ pcpu_scale /= tmp_unsigned;
/* we want (s->pcpu * pcpu_scale) to never overflow */
while (pcpu_scale >= 1024) {
pcpu_scale /= 4;
pcpu_shift -= 2;
}
+ pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
/* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
#endif
- if (OPT_BATCH_MODE) count--;
- while (count-- > 0) {
- div_t pmem = div((s->rss*pmem_scale) >> pmem_shift, 10);
- int col = scr_width+1;
- USE_FEATURE_TOP_CPU_USAGE_PERCENTAGE(div_t pcpu;)
- if (s->rss >= 100*1024)
- sprintf(rss_str_buf, "%6ldM", s->rss/1024);
+ /* Ok, all preliminary data is ready, go through the list */
+ scr_width += 2; /* account for leading '\n' and trailing NUL */
+ if (lines_rem > ntop - G_scroll_ofs)
+ lines_rem = ntop - G_scroll_ofs;
+ s = top + G_scroll_ofs;
+ while (--lines_rem >= 0) {
+ unsigned col;
+ CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
+#endif
+
+ if (s->vsz >= 100000)
+ sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
else
- sprintf(rss_str_buf, "%7ld", s->rss);
- USE_FEATURE_TOP_CPU_USAGE_PERCENTAGE(pcpu = div((s->pcpu*pcpu_scale) >> pcpu_shift, 10);)
- col -= printf("\n%5d %-8s %s %s%6d%3u.%c" \
- USE_FEATURE_TOP_CPU_USAGE_PERCENTAGE("%3u.%c") " ",
- s->pid, s->user, s->state, rss_str_buf, s->ppid,
- USE_FEATURE_TOP_CPU_USAGE_PERCENTAGE(pcpu.quot, '0'+pcpu.rem,)
- pmem.quot, '0'+pmem.rem);
- if (col>0)
- printf("%.*s", col, s->short_cmd);
+ sprintf(vsz_str_buf, "%7lu", s->vsz);
+ /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
+ col = snprintf(line_buf, scr_width,
+ "\n" "%5u%6u %-8.8s %s%s" FMT
+ IF_FEATURE_TOP_SMP_PROCESS(" %3d")
+ IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
+ " ",
+ s->pid, s->ppid, get_cached_username(s->uid),
+ s->state, vsz_str_buf,
+ SHOW_STAT(pmem)
+ IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
+ IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
+ );
+ if ((int)(col + 1) < scr_width)
+ read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
+ fputs(line_buf, stdout);
/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
- jif.busy - prev_jif.busy, jif.total - prev_jif.total); */
+ cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
s++;
}
/* printf(" %d", hist_iterations); */
- putchar(OPT_BATCH_MODE ? '\n' : '\r');
- fflush(stdout);
+ bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
+ fflush_all();
}
+#undef UPSCALE
+#undef SHOW_STAT
+#undef CALC_STAT
+#undef FMT
static void clearmems(void)
{
+ clear_username_cache();
free(top);
- top = 0;
- ntop = 0;
+ top = NULL;
}
-#ifdef CONFIG_FEATURE_USE_TERMIOS
-#include <termios.h>
-#include <signal.h>
-
-
-static struct termios initial_settings;
+#if ENABLE_FEATURE_USE_TERMIOS
static void reset_term(void)
{
- tcsetattr(0, TCSANOW, (void *) &initial_settings);
-#ifdef CONFIG_FEATURE_CLEAN_UP
- clearmems();
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- free(prev_hist);
-#endif
-#endif /* CONFIG_FEATURE_CLEAN_UP */
+ if (!OPT_BATCH_MODE)
+ tcsetattr_stdin_TCSANOW(&initial_settings);
+ if (ENABLE_FEATURE_CLEAN_UP) {
+ clearmems();
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ free(prev_hist);
+# endif
+ }
}
-static void sig_catcher(int sig ATTRIBUTE_UNUSED)
+static void sig_catcher(int sig)
{
reset_term();
- exit(1);
+ kill_myself_with_sig(sig);
}
-#endif /* CONFIG_FEATURE_USE_TERMIOS */
+#endif /* FEATURE_USE_TERMIOS */
+
+/*
+ * TOPMEM support
+ */
+
+typedef unsigned long mem_t;
+
+typedef struct topmem_status_t {
+ unsigned pid;
+ char comm[COMM_LEN];
+ /* vsz doesn't count /dev/xxx mappings except /dev/zero */
+ mem_t vsz ;
+ mem_t vszrw ;
+ mem_t rss ;
+ mem_t rss_sh ;
+ mem_t dirty ;
+ mem_t dirty_sh;
+ mem_t stack ;
+} topmem_status_t;
+
+enum { NUM_SORT_FIELD = 7 };
-int top_main(int argc, char **argv)
+#define topmem ((topmem_status_t*)top)
+
+#if ENABLE_FEATURE_TOPMEM
+
+static int topmem_sort(char *a, char *b)
{
- int count, lines, col;
- unsigned interval = 5; /* default update rate is 5 seconds */
- unsigned iterations = UINT_MAX; /* 2^32 iterations by default :) */
- char *sinterval, *siterations;
-#ifdef CONFIG_FEATURE_USE_TERMIOS
- struct termios new_settings;
- struct timeval tv;
- fd_set readfds;
- unsigned char c;
-#endif /* CONFIG_FEATURE_USE_TERMIOS */
-
- /* do normal option parsing */
- interval = 5;
- opt_complementary = "-";
- getopt32(argc, argv, "d:n:b",
- &sinterval, &siterations);
- if (option_mask32 & 0x1) interval = xatou(sinterval); // -d
- if (option_mask32 & 0x2) iterations = xatou(siterations); // -n
- //if (option_mask32 & 0x4) // -b
+ int n;
+ mem_t l, r;
+
+ n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
+ l = *(mem_t*)(a + n);
+ r = *(mem_t*)(b + n);
+ if (l == r) {
+ l = ((topmem_status_t*)a)->dirty;
+ r = ((topmem_status_t*)b)->dirty;
+ }
+ /* We want to avoid unsigned->signed and truncation errors */
+ /* l>r: -1, l=r: 0, l<r: 1 */
+ n = (l > r) ? -1 : (l != r);
+ return inverted ? -n : n;
+}
+
+/* display header info (meminfo / loadavg) */
+static void display_topmem_header(int scr_width, int *lines_rem_p)
+{
+ enum {
+ TOTAL = 0, MFREE, BUF, CACHE,
+ SWAPTOTAL, SWAPFREE, DIRTY,
+ MWRITE, ANON, MAP, SLAB,
+ NUM_FIELDS
+ };
+ static const char match[NUM_FIELDS][12] = {
+ "\x09" "MemTotal:", // TOTAL
+ "\x08" "MemFree:", // MFREE
+ "\x08" "Buffers:", // BUF
+ "\x07" "Cached:", // CACHE
+ "\x0a" "SwapTotal:", // SWAPTOTAL
+ "\x09" "SwapFree:", // SWAPFREE
+ "\x06" "Dirty:", // DIRTY
+ "\x0a" "Writeback:", // MWRITE
+ "\x0a" "AnonPages:", // ANON
+ "\x07" "Mapped:", // MAP
+ "\x05" "Slab:", // SLAB
+ };
+ char meminfo_buf[4 * 1024];
+ const char *Z[NUM_FIELDS];
+ unsigned i;
+ int sz;
+
+ for (i = 0; i < NUM_FIELDS; i++)
+ Z[i] = "?";
+
+ /* read memory info */
+ sz = open_read_close("meminfo", meminfo_buf, sizeof(meminfo_buf) - 1);
+ if (sz >= 0) {
+ char *p = meminfo_buf;
+ meminfo_buf[sz] = '\0';
+ /* Note that fields always appear in the match[] order */
+ for (i = 0; i < NUM_FIELDS; i++) {
+ char *found = strstr(p, match[i] + 1);
+ if (found) {
+ /* Cut "NNNN" out of " NNNN kb" */
+ char *s = skip_whitespace(found + match[i][0]);
+ p = skip_non_whitespace(s);
+ *p++ = '\0';
+ Z[i] = s;
+ }
+ }
+ }
+
+ snprintf(line_buf, LINE_BUF_SIZE,
+ "Mem total:%s anon:%s map:%s free:%s",
+ Z[TOTAL], Z[ANON], Z[MAP], Z[MFREE]);
+ printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
+
+ snprintf(line_buf, LINE_BUF_SIZE,
+ " slab:%s buf:%s cache:%s dirty:%s write:%s",
+ Z[SLAB], Z[BUF], Z[CACHE], Z[DIRTY], Z[MWRITE]);
+ printf("%.*s\n", scr_width, line_buf);
+
+ snprintf(line_buf, LINE_BUF_SIZE,
+ "Swap total:%s free:%s", // TODO: % used?
+ Z[SWAPTOTAL], Z[SWAPFREE]);
+ printf("%.*s\n", scr_width, line_buf);
+
+ (*lines_rem_p) -= 3;
+}
+
+static void ulltoa6_and_space(unsigned long long ul, char buf[6])
+{
+ /* see http://en.wikipedia.org/wiki/Tera */
+ smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
+}
+
+static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
+{
+#define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
+#define MIN_WIDTH sizeof(HDR_STR)
+ const topmem_status_t *s = topmem + G_scroll_ofs;
+
+ display_topmem_header(scr_width, &lines_rem);
+ strcpy(line_buf, HDR_STR " COMMAND");
+ line_buf[11 + sort_field * 6] = "^_"[inverted];
+ printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
+ lines_rem--;
+
+ if (lines_rem > ntop - G_scroll_ofs)
+ lines_rem = ntop - G_scroll_ofs;
+ while (--lines_rem >= 0) {
+ /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
+ ulltoa6_and_space(s->pid , &line_buf[0*6]);
+ ulltoa6_and_space(s->vsz , &line_buf[1*6]);
+ ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
+ ulltoa6_and_space(s->rss , &line_buf[3*6]);
+ ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
+ ulltoa6_and_space(s->dirty , &line_buf[5*6]);
+ ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
+ ulltoa6_and_space(s->stack , &line_buf[7*6]);
+ line_buf[8*6] = '\0';
+ if (scr_width > (int)MIN_WIDTH) {
+ read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
+ }
+ printf("\n""%.*s", scr_width, line_buf);
+ s++;
+ }
+ bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
+ fflush_all();
+#undef HDR_STR
+#undef MIN_WIDTH
+}
- /* change to /proc */
- xchdir("/proc");
-#ifdef CONFIG_FEATURE_USE_TERMIOS
- tcgetattr(0, (void *) &initial_settings);
- memcpy(&new_settings, &initial_settings, sizeof(struct termios));
- /* unbuffered input, turn off echo */
- new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
-
- signal(SIGTERM, sig_catcher);
- signal(SIGINT, sig_catcher);
- tcsetattr(0, TCSANOW, (void *) &new_settings);
- atexit(reset_term);
-#endif /* CONFIG_FEATURE_USE_TERMIOS */
-
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- sort_function[0] = pcpu_sort;
- sort_function[1] = mem_sort;
- sort_function[2] = time_sort;
#else
- sort_function = mem_sort;
-#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
+void display_topmem_process_list(int lines_rem, int scr_width);
+int topmem_sort(char *a, char *b);
+#endif /* TOPMEM */
+
+/*
+ * end TOPMEM support
+ */
+
+enum {
+ TOP_MASK = 0
+ | PSSCAN_PID
+ | PSSCAN_PPID
+ | PSSCAN_VSZ
+ | PSSCAN_STIME
+ | PSSCAN_UTIME
+ | PSSCAN_STATE
+ | PSSCAN_COMM
+ | PSSCAN_CPU
+ | PSSCAN_UIDGID,
+ TOPMEM_MASK = 0
+ | PSSCAN_PID
+ | PSSCAN_SMAPS
+ | PSSCAN_COMM,
+ EXIT_MASK = (unsigned)-1,
+};
+
+#if ENABLE_FEATURE_USE_TERMIOS
+static unsigned handle_input(unsigned scan_mask, unsigned interval)
+{
+ struct pollfd pfd[1];
+
+ if (option_mask32 & OPT_EOF) {
+ /* EOF on stdin ("top </dev/null") */
+ sleep(interval);
+ return scan_mask;
+ }
+
+ pfd[0].fd = 0;
+ pfd[0].events = POLLIN;
while (1) {
- procps_status_t *p;
-
- /* Default to 25 lines - 5 lines for status */
- lines = 24 - 3;
- col = 79;
-#ifdef CONFIG_FEATURE_USE_TERMIOS
- get_terminal_width_height(0, &col, &lines);
- if (lines < 5 || col < MIN_WIDTH) {
- sleep(interval);
- continue;
+ int32_t c;
+
+ c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
+ if (c == -1 && errno != EAGAIN) {
+ /* error/EOF */
+ option_mask32 |= OPT_EOF;
+ break;
}
- lines -= 3;
-#endif /* CONFIG_FEATURE_USE_TERMIOS */
+ interval = 0;
- /* read process IDs & status for all the processes */
- while ((p = procps_scan(0)) != 0) {
- int n = ntop;
+ if (c == initial_settings.c_cc[VINTR])
+ return EXIT_MASK;
+ if (c == initial_settings.c_cc[VEOF])
+ return EXIT_MASK;
- top = xrealloc(top, (++ntop)*sizeof(procps_status_t));
- memcpy(top + n, p, sizeof(procps_status_t));
+ if (c == KEYCODE_UP) {
+ G_scroll_ofs--;
+ goto normalize_ofs;
}
- if (ntop == 0) {
- bb_error_msg_and_die("Can't find process info in /proc");
+ if (c == KEYCODE_DOWN) {
+ G_scroll_ofs++;
+ goto normalize_ofs;
}
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- if (!prev_hist_count) {
- do_stats();
- sleep(1);
- clearmems();
+ if (c == KEYCODE_HOME) {
+ G_scroll_ofs = 0;
+ break;
+ }
+ if (c == KEYCODE_END) {
+ G_scroll_ofs = ntop - G.lines / 2;
+ goto normalize_ofs;
+ }
+ if (c == KEYCODE_PAGEUP) {
+ G_scroll_ofs -= G.lines / 2;
+ goto normalize_ofs;
+ }
+ if (c == KEYCODE_PAGEDOWN) {
+ G_scroll_ofs += G.lines / 2;
+ normalize_ofs:
+ if (G_scroll_ofs >= ntop)
+ G_scroll_ofs = ntop - 1;
+ if (G_scroll_ofs < 0)
+ G_scroll_ofs = 0;
+ break;
+ }
+
+ c |= 0x20; /* lowercase */
+ if (c == 'q')
+ return EXIT_MASK;
+
+ if (c == 'n') {
+ IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+ sort_function[0] = pid_sort;
continue;
}
- do_stats();
- qsort(top, ntop, sizeof(procps_status_t), (void*)mult_lvl_cmp);
-#else
- qsort(top, ntop, sizeof(procps_status_t), (void*)sort_function);
-#endif /* CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE */
- count = lines;
- if (count > ntop) {
- count = ntop;
+ if (c == 'm') {
+ IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+ sort_function[0] = mem_sort;
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ sort_function[1] = pcpu_sort;
+ sort_function[2] = time_sort;
+# endif
+ continue;
+ }
+# if ENABLE_FEATURE_SHOW_THREADS
+ if (c == 'h'
+ IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
+ ) {
+ scan_mask ^= PSSCAN_TASKS;
+ continue;
+ }
+# endif
+# if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ if (c == 'p') {
+ IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+ sort_function[0] = pcpu_sort;
+ sort_function[1] = mem_sort;
+ sort_function[2] = time_sort;
+ continue;
+ }
+ if (c == 't') {
+ IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
+ sort_function[0] = time_sort;
+ sort_function[1] = mem_sort;
+ sort_function[2] = pcpu_sort;
+ continue;
}
- /* show status for each of the processes */
- display_status(count, col);
-#ifdef CONFIG_FEATURE_USE_TERMIOS
- tv.tv_sec = interval;
- tv.tv_usec = 0;
- FD_ZERO(&readfds);
- FD_SET(0, &readfds);
- select(1, &readfds, NULL, NULL, &tv);
- if (FD_ISSET(0, &readfds)) {
- if (read(0, &c, 1) <= 0) { /* signal */
- return EXIT_FAILURE;
+# if ENABLE_FEATURE_TOPMEM
+ if (c == 's') {
+ scan_mask = TOPMEM_MASK;
+ free(prev_hist);
+ prev_hist = NULL;
+ prev_hist_count = 0;
+ sort_field = (sort_field + 1) % NUM_SORT_FIELD;
+ continue;
+ }
+# endif
+ if (c == 'r') {
+ inverted ^= 1;
+ continue;
+ }
+# if ENABLE_FEATURE_TOP_SMP_CPU
+ /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
+ if (c == 'c' || c == '1') {
+ /* User wants to toggle per cpu <> aggregate */
+ if (smp_cpu_info) {
+ free(cpu_prev_jif);
+ free(cpu_jif);
+ cpu_jif = &cur_jif;
+ cpu_prev_jif = &prev_jif;
+ } else {
+ /* Prepare for xrealloc() */
+ cpu_jif = cpu_prev_jif = NULL;
}
- if (c == 'q' || c == initial_settings.c_cc[VINTR])
- break;
- if (c == 'M') {
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- sort_function[0] = mem_sort;
- sort_function[1] = pcpu_sort;
- sort_function[2] = time_sort;
+ num_cpus = 0;
+ smp_cpu_info = !smp_cpu_info;
+ get_jiffy_counts();
+ continue;
+ }
+# endif
+# endif
+ break; /* unknown key -> force refresh */
+ }
+
+ return scan_mask;
+}
+#endif
+
+//usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
+//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
+//usage:#else
+//usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
+//usage:#endif
+//usage:#define top_trivial_usage
+//usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
+//usage:#define top_full_usage "\n\n"
+//usage: "Provide a view of process activity in real time."
+//usage: "\n""Read the status of all processes from /proc each SECONDS"
+//usage: "\n""and display a screenful of them."
+//usage: "\n""Keys:"
+//usage: "\n"" N/M"
+//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
+//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
+//usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
+//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
+//usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
+//usage: IF_FEATURE_TOPMEM(
+//usage: "\n"" S: show memory"
+//usage: )
+//usage: "\n"" R: reverse sort"
+//usage: IF_SHOW_THREADS_OR_TOP_SMP(
+//usage: "\n"" "
+//usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
+//usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
+//usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
+//usage: )
+//usage: "\n"" Q,^C: exit"
+//usage: "\n"
+//usage: "\n""Options:"
+//usage: "\n"" -b Batch mode"
+//usage: "\n"" -n N Exit after N iterations"
+//usage: "\n"" -d N Delay between updates"
+//usage: IF_FEATURE_TOPMEM(
+//usage: "\n"" -m Same as 's' key"
+//usage: )
+
+/* Interactive testing:
+ * echo sss | ./busybox top
+ * - shows memory screen
+ * echo sss | ./busybox top -bn1 >mem
+ * - saves memory screen - the *whole* list, not first NROWS processes!
+ * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
+ * - saves several different screens, and exits
+ *
+ * TODO: -i STRING param as a better alternative?
+ */
+
+int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int top_main(int argc UNUSED_PARAM, char **argv)
+{
+ int iterations;
+ unsigned col;
+ unsigned interval;
+ char *str_interval, *str_iterations;
+ unsigned scan_mask = TOP_MASK;
+#if ENABLE_FEATURE_USE_TERMIOS
+ struct termios new_settings;
+#endif
+
+ INIT_G();
+
+ interval = 5; /* default update interval is 5 seconds */
+ iterations = 0; /* infinite */
+#if ENABLE_FEATURE_TOP_SMP_CPU
+ /*num_cpus = 0;*/
+ /*smp_cpu_info = 0;*/ /* to start with show aggregate */
+ cpu_jif = &cur_jif;
+ cpu_prev_jif = &prev_jif;
+#endif
+
+ /* all args are options; -n NUM */
+ opt_complementary = "-"; /* options can be specified w/o dash */
+ col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
+#if ENABLE_FEATURE_TOPMEM
+ if (col & OPT_m) /* -m (busybox specific) */
+ scan_mask = TOPMEM_MASK;
+#endif
+ if (col & OPT_d) {
+ /* work around for "-d 1" -> "-d -1" done by getopt32
+ * (opt_complementary == "-" does this) */
+ if (str_interval[0] == '-')
+ str_interval++;
+ /* Need to limit it to not overflow poll timeout */
+ interval = xatou16(str_interval);
+ }
+ if (col & OPT_n) {
+ if (str_iterations[0] == '-')
+ str_iterations++;
+ iterations = xatou(str_iterations);
+ }
+
+ /* change to /proc */
+ xchdir("/proc");
+
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ sort_function[0] = pcpu_sort;
+ sort_function[1] = mem_sort;
+ sort_function[2] = time_sort;
#else
- sort_function = mem_sort;
+ sort_function[0] = mem_sort;
#endif
+
+ if (OPT_BATCH_MODE) {
+ option_mask32 |= OPT_EOF;
+ }
+#if ENABLE_FEATURE_USE_TERMIOS
+ else {
+ tcgetattr(0, (void *) &initial_settings);
+ memcpy(&new_settings, &initial_settings, sizeof(new_settings));
+ /* unbuffered input, turn off echo */
+ new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
+ tcsetattr_stdin_TCSANOW(&new_settings);
+ }
+
+ bb_signals(BB_FATAL_SIGS, sig_catcher);
+
+ /* Eat initial input, if any */
+ scan_mask = handle_input(scan_mask, 0);
+#endif
+
+ while (scan_mask != EXIT_MASK) {
+ procps_status_t *p = NULL;
+
+ if (OPT_BATCH_MODE) {
+ G.lines = INT_MAX;
+ col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
+ } else {
+ G.lines = 24; /* default */
+ col = 79;
+#if ENABLE_FEATURE_USE_TERMIOS
+ /* We output to stdout, we need size of stdout (not stdin)! */
+ get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
+ if (G.lines < 5 || col < 10) {
+ sleep(interval);
+ continue;
}
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- if (c == 'P') {
- sort_function[0] = pcpu_sort;
- sort_function[1] = mem_sort;
- sort_function[2] = time_sort;
+#endif
+ if (col > LINE_BUF_SIZE - 2)
+ col = LINE_BUF_SIZE - 2;
+ }
+
+ /* read process IDs & status for all the processes */
+ ntop = 0;
+ while ((p = procps_scan(p, scan_mask)) != NULL) {
+ int n;
+#if ENABLE_FEATURE_TOPMEM
+ if (scan_mask != TOPMEM_MASK)
+#endif
+ {
+ n = ntop;
+ top = xrealloc_vector(top, 6, ntop++);
+ top[n].pid = p->pid;
+ top[n].ppid = p->ppid;
+ top[n].vsz = p->vsz;
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ top[n].ticks = p->stime + p->utime;
+#endif
+ top[n].uid = p->uid;
+ strcpy(top[n].state, p->state);
+ strcpy(top[n].comm, p->comm);
+#if ENABLE_FEATURE_TOP_SMP_PROCESS
+ top[n].last_seen_on_cpu = p->last_seen_on_cpu;
+#endif
}
- if (c == 'T') {
- sort_function[0] = time_sort;
- sort_function[1] = mem_sort;
- sort_function[2] = pcpu_sort;
+#if ENABLE_FEATURE_TOPMEM
+ else { /* TOPMEM */
+ if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
+ continue; /* kernel threads are ignored */
+ n = ntop;
+ /* No bug here - top and topmem are the same */
+ top = xrealloc_vector(topmem, 6, ntop++);
+ strcpy(topmem[n].comm, p->comm);
+ topmem[n].pid = p->pid;
+ topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
+ topmem[n].vszrw = p->smaps.mapped_rw;
+ topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
+ topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
+ topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
+ topmem[n].dirty_sh = p->smaps.shared_dirty;
+ topmem[n].stack = p->smaps.stack;
}
#endif
- if (c == 'N') {
-#ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
- sort_function[0] = pid_sort;
+ } /* end of "while we read /proc" */
+ if (ntop == 0) {
+ bb_error_msg("no process info in /proc");
+ break;
+ }
+
+ if (scan_mask != TOPMEM_MASK) {
+#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
+ if (!prev_hist_count) {
+ do_stats();
+ usleep(100000);
+ clearmems();
+ continue;
+ }
+ do_stats();
+ /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
+ qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
#else
- sort_function = pid_sort;
+ qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
#endif
- }
}
- if (!--iterations)
+#if ENABLE_FEATURE_TOPMEM
+ else { /* TOPMEM */
+ qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
+ }
+#endif
+ if (scan_mask != TOPMEM_MASK)
+ display_process_list(G.lines, col);
+#if ENABLE_FEATURE_TOPMEM
+ else
+ display_topmem_process_list(G.lines, col);
+#endif
+ clearmems();
+ if (iterations >= 0 && !--iterations)
break;
-#else
+#if !ENABLE_FEATURE_USE_TERMIOS
sleep(interval);
-#endif /* CONFIG_FEATURE_USE_TERMIOS */
- clearmems();
- }
- if (ENABLE_FEATURE_CLEAN_UP)
- clearmems();
- putchar('\n');
+#else
+ scan_mask = handle_input(scan_mask, interval);
+#endif /* FEATURE_USE_TERMIOS */
+ } /* end of "while (not Q)" */
+
+ bb_putchar('\n');
+#if ENABLE_FEATURE_USE_TERMIOS
+ reset_term();
+#endif
return EXIT_SUCCESS;
}
projects / platform / upstream / busybox.git / blobdiff