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61befda93b
*: remove some redundant includes
1125 lines
29 KiB
C
1125 lines
29 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* A tiny 'top' utility.
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*
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* This is written specifically for the linux /proc/<PID>/stat(m)
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* files format.
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* This reads the PIDs of all processes and their status and shows
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* the status of processes (first ones that fit to screen) at given
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* intervals.
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*
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* NOTES:
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* - At startup this changes to /proc, all the reads are then
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* relative to that.
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*
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* (C) Eero Tamminen <oak at welho dot com>
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*
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* Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
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*
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* Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
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* Added Support for reporting SMP Information
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* - CPU where Process was last seen running
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* (to see effect of sched_setaffinity() etc)
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* - CPU Time Split (idle/IO/wait etc) PER CPU
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*/
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/* Original code Copyrights */
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/*
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* Copyright (c) 1992 Branko Lankester
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* Copyright (c) 1992 Roger Binns
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* Copyright (C) 1994-1996 Charles L. Blake.
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* Copyright (C) 1992-1998 Michael K. Johnson
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* May be distributed under the conditions of the
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* GNU Library General Public License
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*/
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#include "libbb.h"
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typedef struct top_status_t {
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unsigned long vsz;
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#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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unsigned long ticks;
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unsigned pcpu; /* delta of ticks */
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#endif
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unsigned pid, ppid;
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unsigned uid;
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char state[4];
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char comm[COMM_LEN];
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#if ENABLE_FEATURE_TOP_SMP_PROCESS
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int last_seen_on_cpu;
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#endif
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} top_status_t;
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typedef struct jiffy_counts_t {
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unsigned long long usr,nic,sys,idle,iowait,irq,softirq,steal;
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unsigned long long total;
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unsigned long long busy;
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} jiffy_counts_t;
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/* This structure stores some critical information from one frame to
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the next. Used for finding deltas. */
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typedef struct save_hist {
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unsigned long ticks;
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pid_t pid;
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} save_hist;
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typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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enum { SORT_DEPTH = 3 };
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struct globals {
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top_status_t *top;
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int ntop;
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#if ENABLE_FEATURE_TOPMEM
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smallint sort_field;
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smallint inverted;
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#endif
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#if ENABLE_FEATURE_TOP_SMP_CPU
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smallint smp_cpu_info; /* one/many cpu info lines? */
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#endif
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#if ENABLE_FEATURE_USE_TERMIOS
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struct termios initial_settings;
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#endif
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#if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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cmp_funcp sort_function[1];
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#else
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cmp_funcp sort_function[SORT_DEPTH];
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struct save_hist *prev_hist;
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int prev_hist_count;
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jiffy_counts_t cur_jif, prev_jif;
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/* int hist_iterations; */
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unsigned total_pcpu;
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/* unsigned long total_vsz; */
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#endif
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#if ENABLE_FEATURE_TOP_SMP_CPU
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/* Per CPU samples: current and last */
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jiffy_counts_t *cpu_jif, *cpu_prev_jif;
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int num_cpus;
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#endif
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char line_buf[80];
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};
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enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
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#define G (*(struct globals*)&bb_common_bufsiz1)
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#define INIT_G() do { \
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struct G_sizecheck { \
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char G_sizecheck[sizeof(G) > COMMON_BUFSIZE ? -1 : 1]; \
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}; \
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} while (0)
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#define top (G.top )
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#define ntop (G.ntop )
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#define sort_field (G.sort_field )
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#define inverted (G.inverted )
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#define smp_cpu_info (G.smp_cpu_info )
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#define initial_settings (G.initial_settings )
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#define sort_function (G.sort_function )
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#define prev_hist (G.prev_hist )
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#define prev_hist_count (G.prev_hist_count )
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#define cur_jif (G.cur_jif )
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#define prev_jif (G.prev_jif )
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#define cpu_jif (G.cpu_jif )
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#define cpu_prev_jif (G.cpu_prev_jif )
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#define num_cpus (G.num_cpus )
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#define total_pcpu (G.total_pcpu )
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#define line_buf (G.line_buf )
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enum {
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OPT_d = (1 << 0),
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OPT_n = (1 << 1),
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OPT_b = (1 << 2),
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OPT_EOF = (1 << 3), /* pseudo: "we saw EOF in stdin" */
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};
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#define OPT_BATCH_MODE (option_mask32 & OPT_b)
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#if ENABLE_FEATURE_USE_TERMIOS
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static int pid_sort(top_status_t *P, top_status_t *Q)
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{
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/* Buggy wrt pids with high bit set */
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/* (linux pids are in [1..2^15-1]) */
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return (Q->pid - P->pid);
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}
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#endif
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static int mem_sort(top_status_t *P, top_status_t *Q)
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{
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/* We want to avoid unsigned->signed and truncation errors */
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if (Q->vsz < P->vsz) return -1;
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return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
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}
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#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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static int pcpu_sort(top_status_t *P, top_status_t *Q)
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{
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/* Buggy wrt ticks with high bit set */
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/* Affects only processes for which ticks overflow */
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return (int)Q->pcpu - (int)P->pcpu;
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}
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static int time_sort(top_status_t *P, top_status_t *Q)
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{
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/* We want to avoid unsigned->signed and truncation errors */
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if (Q->ticks < P->ticks) return -1;
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return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
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}
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static int mult_lvl_cmp(void* a, void* b)
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{
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int i, cmp_val;
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for (i = 0; i < SORT_DEPTH; i++) {
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cmp_val = (*sort_function[i])(a, b);
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if (cmp_val != 0)
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return cmp_val;
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}
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return 0;
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}
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/* NOINLINE so that complier doesn't unfold the call
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* causing multiple copies of the arithmatic instrns
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*/
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static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
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{
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#if !ENABLE_FEATURE_TOP_SMP_CPU
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static const char fmt[] = "cpu %lld %lld %lld %lld %lld %lld %lld %lld";
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#else
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static const char fmt[] = "cp%*s %lld %lld %lld %lld %lld %lld %lld %lld";
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#endif
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int ret;
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if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
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return 0;
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ret = sscanf(line_buf, fmt,
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&p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
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&p_jif->iowait, &p_jif->irq, &p_jif->softirq,
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&p_jif->steal);
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if (ret > 4) {
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p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
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+ p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
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/* procps 2.x does not count iowait as busy time */
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p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
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}
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return ret;
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}
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static void get_jiffy_counts(void)
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{
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FILE* fp = xfopen_for_read("stat");
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/* We need to parse cumulative counts even if SMP CPU display is on,
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* they are used to calculate per process CPU% */
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prev_jif = cur_jif;
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if (read_cpu_jiffy(fp, &cur_jif) < 4)
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bb_error_msg_and_die("can't read /proc/stat");
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#if !ENABLE_FEATURE_TOP_SMP_CPU
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fclose(fp);
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return;
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#else
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if (!smp_cpu_info) {
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fclose(fp);
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return;
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}
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if (!num_cpus) {
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/* First time here. How many CPUs?
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* There will be at least 1 /proc/stat line with cpu%d
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*/
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while (1) {
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cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
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if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
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break;
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num_cpus++;
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}
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if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
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smp_cpu_info = 0;
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cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
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/* Otherwise the first per cpu display shows all 100% idles */
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usleep(50000);
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} else { /* Non first time invocation */
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jiffy_counts_t *tmp;
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int i;
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/* First switch the sample pointers: no need to copy */
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tmp = cpu_prev_jif;
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cpu_prev_jif = cpu_jif;
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cpu_jif = tmp;
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/* Get the new samples */
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for (i = 0; i < num_cpus; i++)
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read_cpu_jiffy(fp, &cpu_jif[i]);
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}
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#endif
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fclose(fp);
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}
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static void do_stats(void)
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{
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top_status_t *cur;
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pid_t pid;
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int i, last_i, n;
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struct save_hist *new_hist;
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get_jiffy_counts();
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total_pcpu = 0;
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/* total_vsz = 0; */
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new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
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/*
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* Make a pass through the data to get stats.
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*/
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/* hist_iterations = 0; */
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i = 0;
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for (n = 0; n < ntop; n++) {
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cur = top + n;
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/*
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* Calculate time in cur process. Time is sum of user time
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* and system time
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*/
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pid = cur->pid;
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new_hist[n].ticks = cur->ticks;
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new_hist[n].pid = pid;
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/* find matching entry from previous pass */
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cur->pcpu = 0;
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/* do not start at index 0, continue at last used one
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* (brought hist_iterations from ~14000 down to 172) */
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last_i = i;
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if (prev_hist_count) do {
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if (prev_hist[i].pid == pid) {
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cur->pcpu = cur->ticks - prev_hist[i].ticks;
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total_pcpu += cur->pcpu;
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break;
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}
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i = (i+1) % prev_hist_count;
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/* hist_iterations++; */
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} while (i != last_i);
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/* total_vsz += cur->vsz; */
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}
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/*
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* Save cur frame's information.
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*/
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free(prev_hist);
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prev_hist = new_hist;
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prev_hist_count = ntop;
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}
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#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
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#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
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/* formats 7 char string (8 with terminating NUL) */
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static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
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{
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unsigned t;
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if (value >= total) { /* 100% ? */
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strcpy(pbuf, " 100% ");
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return pbuf;
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}
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/* else generate " [N/space]N.N% " string */
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value = 1000 * value / total;
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t = value / 100;
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value = value % 100;
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pbuf[0] = ' ';
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pbuf[1] = t ? t + '0' : ' ';
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pbuf[2] = '0' + (value / 10);
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pbuf[3] = '.';
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pbuf[4] = '0' + (value % 10);
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pbuf[5] = '%';
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pbuf[6] = ' ';
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pbuf[7] = '\0';
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return pbuf;
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}
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#endif
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#if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
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{
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/*
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* xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
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*/
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unsigned total_diff;
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jiffy_counts_t *p_jif, *p_prev_jif;
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int i;
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#if ENABLE_FEATURE_TOP_SMP_CPU
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int n_cpu_lines;
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#endif
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/* using (unsigned) casts to make operations cheaper */
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#define CALC_TOT_DIFF ((unsigned)(p_jif->total - p_prev_jif->total) ? : 1)
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#if ENABLE_FEATURE_TOP_DECIMALS
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#define CALC_STAT(xxx) char xxx[8]
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#define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
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#define FMT "%s"
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#else
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#define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
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#define SHOW_STAT(xxx) xxx
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#define FMT "%4u%% "
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#endif
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#if !ENABLE_FEATURE_TOP_SMP_CPU
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{
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i = 1;
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p_jif = &cur_jif;
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p_prev_jif = &prev_jif;
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#else
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/* Loop thru CPU(s) */
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n_cpu_lines = smp_cpu_info ? num_cpus : 1;
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if (n_cpu_lines > *lines_rem_p)
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n_cpu_lines = *lines_rem_p;
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for (i = 0; i < n_cpu_lines; i++) {
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p_jif = &cpu_jif[i];
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p_prev_jif = &cpu_prev_jif[i];
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#endif
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total_diff = CALC_TOT_DIFF;
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{ /* Need a block: CALC_STAT are declarations */
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CALC_STAT(usr);
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CALC_STAT(sys);
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CALC_STAT(nic);
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CALC_STAT(idle);
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CALC_STAT(iowait);
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CALC_STAT(irq);
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CALC_STAT(softirq);
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/*CALC_STAT(steal);*/
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snprintf(scrbuf, scr_width,
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/* Barely fits in 79 chars when in "decimals" mode. */
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#if ENABLE_FEATURE_TOP_SMP_CPU
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"CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
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(smp_cpu_info ? utoa(i) : ""),
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#else
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"CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
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#endif
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SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
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SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
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/*, SHOW_STAT(steal) - what is this 'steal' thing? */
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/* I doubt anyone wants to know it */
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);
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puts(scrbuf);
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}
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}
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#undef SHOW_STAT
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#undef CALC_STAT
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#undef FMT
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*lines_rem_p -= i;
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}
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#else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
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#define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
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#endif
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static unsigned long display_header(int scr_width, int *lines_rem_p)
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{
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FILE *fp;
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char buf[80];
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char scrbuf[80];
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unsigned long total, used, mfree, shared, buffers, cached;
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/* read memory info */
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fp = xfopen_for_read("meminfo");
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/*
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* Old kernels (such as 2.4.x) had a nice summary of memory info that
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* we could parse, however this is gone entirely in 2.6. Try parsing
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* the old way first, and if that fails, parse each field manually.
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*
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* First, we read in the first line. Old kernels will have bogus
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* strings we don't care about, whereas new kernels will start right
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* out with MemTotal:
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* -- PFM.
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*/
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if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
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fgets(buf, sizeof(buf), fp); /* skip first line */
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fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
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&total, &used, &mfree, &shared, &buffers, &cached);
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/* convert to kilobytes */
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used /= 1024;
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mfree /= 1024;
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shared /= 1024;
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buffers /= 1024;
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cached /= 1024;
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total /= 1024;
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} else {
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/*
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* Revert to manual parsing, which incidentally already has the
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* sizes in kilobytes. This should be safe for both 2.4 and
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* 2.6.
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*/
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fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
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/*
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* MemShared: is no longer present in 2.6. Report this as 0,
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* to maintain consistent behavior with normal procps.
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*/
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if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
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shared = 0;
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fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
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fscanf(fp, "Cached: %lu %s\n", &cached, buf);
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used = total - mfree;
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}
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fclose(fp);
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/* output memory info */
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if (scr_width > (int)sizeof(scrbuf))
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scr_width = sizeof(scrbuf);
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snprintf(scrbuf, scr_width,
|
|
"Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
|
used, mfree, shared, buffers, cached);
|
|
/* clear screen & go to top */
|
|
printf(OPT_BATCH_MODE ? "%s\n" : "\e[H\e[J%s\n", scrbuf);
|
|
(*lines_rem_p)--;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
|
{
|
|
enum {
|
|
BITS_PER_INT = sizeof(int) * 8
|
|
};
|
|
|
|
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 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 PPID USER STAT VSZ %MEM"
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
" CPU"
|
|
#endif
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
" %CPU"
|
|
#endif
|
|
" 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
|
|
#define UPSCALE 100
|
|
#define CALC_STAT(name, val) unsigned name = (val)
|
|
#define SHOW_STAT(name) name
|
|
#define FMT "%4u%%"
|
|
#endif
|
|
/*
|
|
* MEM% = s->vsz/MemTotal
|
|
*/
|
|
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;
|
|
}
|
|
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)
|
|
*/
|
|
/* (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 = (UPSCALE*64 * (uint16_t)busy_jifs ? : 1);
|
|
while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
|
|
pcpu_scale *= 4;
|
|
pcpu_shift += 2;
|
|
}
|
|
pcpu_scale /= ( (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu ? : 1);
|
|
/* 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
|
|
|
|
/* Ok, all preliminary data is ready, go through the list */
|
|
scr_width += 2; /* account for leading '\n' and trailing NUL */
|
|
if (lines_rem > ntop)
|
|
lines_rem = ntop;
|
|
s = top;
|
|
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(vsz_str_buf, "%7ld", s->vsz);
|
|
/* PID PPID USER STAT VSZ %MEM [%CPU] COMMAND */
|
|
col = snprintf(line_buf, scr_width,
|
|
"\n" "%5u%6u %-8.8s %s%s" FMT
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
" %3d"
|
|
#endif
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
FMT
|
|
#endif
|
|
" ",
|
|
s->pid, s->ppid, get_cached_username(s->uid),
|
|
s->state, vsz_str_buf,
|
|
SHOW_STAT(pmem)
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
, s->last_seen_on_cpu
|
|
#endif
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
, SHOW_STAT(pcpu)
|
|
#endif
|
|
);
|
|
if ((int)(col + 1) < scr_width)
|
|
read_cmdline(line_buf + col, scr_width - col - 1, s->pid, s->comm);
|
|
fputs(line_buf, stdout);
|
|
/* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
|
cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
|
s++;
|
|
}
|
|
/* printf(" %d", hist_iterations); */
|
|
bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
|
fflush(stdout);
|
|
}
|
|
#undef UPSCALE
|
|
#undef SHOW_STAT
|
|
#undef CALC_STAT
|
|
#undef FMT
|
|
|
|
static void clearmems(void)
|
|
{
|
|
clear_username_cache();
|
|
free(top);
|
|
top = NULL;
|
|
ntop = 0;
|
|
}
|
|
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
|
|
static void reset_term(void)
|
|
{
|
|
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 UNUSED_PARAM)
|
|
{
|
|
reset_term();
|
|
exit(EXIT_FAILURE);
|
|
}
|
|
#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 };
|
|
|
|
#define topmem ((topmem_status_t*)top)
|
|
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
|
|
static int topmem_sort(char *a, char *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 = a->mapped_rw;
|
|
// r = b->mapped_rw;
|
|
// }
|
|
/* 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;
|
|
}
|
|
|
|
/* Cut "NNNN " out of " NNNN kb" */
|
|
static char *grab_number(char *str, const char *match, unsigned sz)
|
|
{
|
|
if (strncmp(str, match, sz) == 0) {
|
|
str = skip_whitespace(str + sz);
|
|
(skip_non_whitespace(str))[1] = '\0';
|
|
return xstrdup(str);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* display header info (meminfo / loadavg) */
|
|
static void display_topmem_header(int scr_width, int *lines_rem_p)
|
|
{
|
|
char linebuf[128];
|
|
unsigned i;
|
|
FILE *fp;
|
|
union {
|
|
struct {
|
|
/* 1 */ char *total;
|
|
/* 2 */ char *mfree;
|
|
/* 3 */ char *buf;
|
|
/* 4 */ char *cache;
|
|
/* 5 */ char *swaptotal;
|
|
/* 6 */ char *swapfree;
|
|
/* 7 */ char *dirty;
|
|
/* 8 */ char *mwrite;
|
|
/* 9 */ char *anon;
|
|
/* 10 */ char *map;
|
|
/* 11 */ char *slab;
|
|
} u;
|
|
char *str[11];
|
|
} Z;
|
|
#define total Z.u.total
|
|
#define mfree Z.u.mfree
|
|
#define buf Z.u.buf
|
|
#define cache Z.u.cache
|
|
#define swaptotal Z.u.swaptotal
|
|
#define swapfree Z.u.swapfree
|
|
#define dirty Z.u.dirty
|
|
#define mwrite Z.u.mwrite
|
|
#define anon Z.u.anon
|
|
#define map Z.u.map
|
|
#define slab Z.u.slab
|
|
#define str Z.str
|
|
|
|
memset(&Z, 0, sizeof(Z));
|
|
|
|
/* read memory info */
|
|
fp = xfopen_for_read("meminfo");
|
|
while (fgets(linebuf, sizeof(linebuf), fp)) {
|
|
char *p;
|
|
|
|
#define SCAN(match, name) \
|
|
p = grab_number(linebuf, match, sizeof(match)-1); \
|
|
if (p) { name = p; continue; }
|
|
|
|
SCAN("MemTotal:", total);
|
|
SCAN("MemFree:", mfree);
|
|
SCAN("Buffers:", buf);
|
|
SCAN("Cached:", cache);
|
|
SCAN("SwapTotal:", swaptotal);
|
|
SCAN("SwapFree:", swapfree);
|
|
SCAN("Dirty:", dirty);
|
|
SCAN("Writeback:", mwrite);
|
|
SCAN("AnonPages:", anon);
|
|
SCAN("Mapped:", map);
|
|
SCAN("Slab:", slab);
|
|
#undef SCAN
|
|
}
|
|
fclose(fp);
|
|
|
|
#define S(s) (s ? s : "0 ")
|
|
snprintf(linebuf, sizeof(linebuf),
|
|
"Mem %stotal %sanon %smap %sfree",
|
|
S(total), S(anon), S(map), S(mfree));
|
|
printf(OPT_BATCH_MODE ? "%.*s\n" : "\e[H\e[J%.*s\n", scr_width, linebuf);
|
|
|
|
snprintf(linebuf, sizeof(linebuf),
|
|
" %sslab %sbuf %scache %sdirty %swrite",
|
|
S(slab), S(buf), S(cache), S(dirty), S(mwrite));
|
|
printf("%.*s\n", scr_width, linebuf);
|
|
|
|
snprintf(linebuf, sizeof(linebuf),
|
|
"Swap %stotal %sfree", // TODO: % used?
|
|
S(swaptotal), S(swapfree));
|
|
printf("%.*s\n", scr_width, linebuf);
|
|
|
|
(*lines_rem_p) -= 3;
|
|
#undef S
|
|
|
|
for (i = 0; i < ARRAY_SIZE(str); i++)
|
|
free(str[i]);
|
|
#undef total
|
|
#undef free
|
|
#undef buf
|
|
#undef cache
|
|
#undef swaptotal
|
|
#undef swapfree
|
|
#undef dirty
|
|
#undef write
|
|
#undef anon
|
|
#undef map
|
|
#undef slab
|
|
#undef str
|
|
}
|
|
|
|
static void ulltoa6_and_space(unsigned long long ul, char buf[6])
|
|
{
|
|
/* see http://en.wikipedia.org/wiki/Tera */
|
|
smart_ulltoa5(ul, buf, " mgtpezy");
|
|
buf[5] = ' ';
|
|
}
|
|
|
|
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;
|
|
|
|
display_topmem_header(scr_width, &lines_rem);
|
|
strcpy(line_buf, HDR_STR " COMMAND");
|
|
line_buf[5 + sort_field * 6] = '*';
|
|
printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
|
lines_rem--;
|
|
|
|
if (lines_rem > ntop)
|
|
lines_rem = ntop;
|
|
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(stdout);
|
|
#undef HDR_STR
|
|
#undef MIN_WIDTH
|
|
}
|
|
|
|
#else
|
|
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
|
|
#if ENABLE_FEATURE_TOP_SMP_PROCESS
|
|
| PSSCAN_CPU
|
|
#endif
|
|
| PSSCAN_UIDGID,
|
|
TOPMEM_MASK = 0
|
|
| PSSCAN_PID
|
|
| PSSCAN_SMAPS
|
|
| PSSCAN_COMM,
|
|
};
|
|
|
|
int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
|
int top_main(int argc UNUSED_PARAM, char **argv)
|
|
{
|
|
int iterations;
|
|
unsigned lines, col;
|
|
int lines_rem;
|
|
unsigned interval;
|
|
char *str_interval, *str_iterations;
|
|
SKIP_FEATURE_TOPMEM(const) unsigned scan_mask = TOP_MASK;
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
struct termios new_settings;
|
|
struct pollfd pfd[1];
|
|
unsigned char c;
|
|
|
|
pfd[0].fd = 0;
|
|
pfd[0].events = POLLIN;
|
|
#endif /* FEATURE_USE_TERMIOS */
|
|
|
|
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 = "-";
|
|
col = getopt32(argv, "d:n:b", &str_interval, &str_iterations);
|
|
if (col & OPT_d) {
|
|
/* work around for "-d 1" -> "-d -1" done by getopt32 */
|
|
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_USE_TERMIOS
|
|
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);
|
|
|
|
bb_signals(BB_FATAL_SIGS, sig_catcher);
|
|
tcsetattr_stdin_TCSANOW(&new_settings);
|
|
#endif /* FEATURE_USE_TERMIOS */
|
|
|
|
#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[0] = mem_sort;
|
|
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
|
|
|
while (1) {
|
|
procps_status_t *p = NULL;
|
|
|
|
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, &lines);
|
|
if (lines < 5 || col < 10) {
|
|
sleep(interval);
|
|
continue;
|
|
}
|
|
#endif /* FEATURE_USE_TERMIOS */
|
|
if (col > LINE_BUF_SIZE-2) /* +2 bytes for '\n', NUL, */
|
|
col = LINE_BUF_SIZE-2;
|
|
|
|
/* read process IDs & status for all the processes */
|
|
while ((p = procps_scan(p, scan_mask)) != NULL) {
|
|
int n;
|
|
if (scan_mask == TOP_MASK) {
|
|
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
|
|
} else { /* TOPMEM */
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
if (!(p->mapped_ro | p->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->mapped_rw + p->mapped_ro;
|
|
topmem[n].vszrw = p->mapped_rw;
|
|
topmem[n].rss_sh = p->shared_clean + p->shared_dirty;
|
|
topmem[n].rss = p->private_clean + p->private_dirty + topmem[n].rss_sh;
|
|
topmem[n].dirty = p->private_dirty + p->shared_dirty;
|
|
topmem[n].dirty_sh = p->shared_dirty;
|
|
topmem[n].stack = p->stack;
|
|
#endif
|
|
}
|
|
} /* end of "while we read /proc" */
|
|
if (ntop == 0) {
|
|
bb_error_msg("no process info in /proc");
|
|
break;
|
|
}
|
|
|
|
if (scan_mask == TOP_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
|
|
qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
|
#endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
|
}
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
else { /* TOPMEM */
|
|
qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
|
}
|
|
#endif
|
|
lines_rem = lines;
|
|
if (OPT_BATCH_MODE) {
|
|
lines_rem = INT_MAX;
|
|
}
|
|
if (scan_mask == TOP_MASK)
|
|
display_process_list(lines_rem, col);
|
|
#if ENABLE_FEATURE_TOPMEM
|
|
else
|
|
display_topmem_process_list(lines_rem, col);
|
|
#endif
|
|
clearmems();
|
|
if (iterations >= 0 && !--iterations)
|
|
break;
|
|
#if !ENABLE_FEATURE_USE_TERMIOS
|
|
sleep(interval);
|
|
#else
|
|
if (option_mask32 & (OPT_b|OPT_EOF))
|
|
/* batch mode, or EOF on stdin ("top </dev/null") */
|
|
sleep(interval);
|
|
else if (safe_poll(pfd, 1, interval * 1000) > 0) {
|
|
if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */
|
|
option_mask32 |= OPT_EOF;
|
|
continue;
|
|
}
|
|
if (c == initial_settings.c_cc[VINTR])
|
|
break;
|
|
c |= 0x20; /* lowercase */
|
|
if (c == 'q')
|
|
break;
|
|
if (c == 'n') {
|
|
USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = pid_sort;
|
|
}
|
|
if (c == 'm') {
|
|
USE_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
|
|
}
|
|
#if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
|
if (c == 'p') {
|
|
USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = pcpu_sort;
|
|
sort_function[1] = mem_sort;
|
|
sort_function[2] = time_sort;
|
|
}
|
|
if (c == 't') {
|
|
USE_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
|
sort_function[0] = time_sort;
|
|
sort_function[1] = mem_sort;
|
|
sort_function[2] = pcpu_sort;
|
|
}
|
|
#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;
|
|
}
|
|
if (c == 'r')
|
|
inverted ^= 1;
|
|
#endif
|
|
#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;
|
|
}
|
|
num_cpus = 0;
|
|
smp_cpu_info = !smp_cpu_info;
|
|
get_jiffy_counts();
|
|
}
|
|
#endif
|
|
#endif
|
|
}
|
|
#endif /* FEATURE_USE_TERMIOS */
|
|
} /* end of "while (1)" */
|
|
|
|
bb_putchar('\n');
|
|
#if ENABLE_FEATURE_USE_TERMIOS
|
|
reset_term();
|
|
#endif
|
|
return EXIT_SUCCESS;
|
|
}
|