[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * A tiny 'top' utility.
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| 4 | *
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| 5 | * This is written specifically for the linux /proc/<PID>/stat(m)
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| 6 | * files format.
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| 7 | *
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| 8 | * This reads the PIDs of all processes and their status and shows
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| 9 | * the status of processes (first ones that fit to screen) at given
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| 10 | * intervals.
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| 11 | *
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| 12 | * NOTES:
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| 13 | * - At startup this changes to /proc, all the reads are then
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| 14 | * relative to that.
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| 15 | *
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| 16 | * (C) Eero Tamminen <oak at welho dot com>
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| 17 | *
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| 18 | * Rewritten by Vladimir Oleynik (C) 2002 <dzo@simtreas.ru>
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| 19 | *
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| 20 | * Sept 2008: Vineet Gupta <vineet.gupta@arc.com>
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| 21 | * Added Support for reporting SMP Information
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| 22 | * - CPU where Process was last seen running
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| 23 | * (to see effect of sched_setaffinity() etc)
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| 24 | * - CPU Time Split (idle/IO/wait etc) PER CPU
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| 25 | *
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| 26 | * Copyright (c) 1992 Branko Lankester
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| 27 | * Copyright (c) 1992 Roger Binns
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| 28 | * Copyright (C) 1994-1996 Charles L. Blake.
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| 29 | * Copyright (C) 1992-1998 Michael K. Johnson
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| 30 | *
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| 31 | * Licensed under GPLv2, see file LICENSE in this source tree.
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| 32 | */
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| 33 |
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| 34 | #include "libbb.h"
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| 35 |
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| 36 |
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| 37 | typedef struct top_status_t {
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| 38 | unsigned long vsz;
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| 39 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 40 | unsigned long ticks;
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| 41 | unsigned pcpu; /* delta of ticks */
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| 42 | #endif
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| 43 | unsigned pid, ppid;
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| 44 | unsigned uid;
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| 45 | char state[4];
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| 46 | char comm[COMM_LEN];
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| 47 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
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| 48 | int last_seen_on_cpu;
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| 49 | #endif
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| 50 | } top_status_t;
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| 51 |
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| 52 | typedef struct jiffy_counts_t {
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| 53 | /* Linux 2.4.x has only first four */
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| 54 | unsigned long long usr, nic, sys, idle;
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| 55 | unsigned long long iowait, irq, softirq, steal;
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| 56 | unsigned long long total;
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| 57 | unsigned long long busy;
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| 58 | } jiffy_counts_t;
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| 59 |
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| 60 | /* This structure stores some critical information from one frame to
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| 61 | the next. Used for finding deltas. */
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| 62 | typedef struct save_hist {
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| 63 | unsigned long ticks;
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| 64 | pid_t pid;
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| 65 | } save_hist;
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| 66 |
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| 67 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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| 68 |
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| 69 |
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| 70 | enum { SORT_DEPTH = 3 };
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| 71 |
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| 72 |
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| 73 | struct globals {
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| 74 | top_status_t *top;
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| 75 | int ntop;
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| 76 | #if ENABLE_FEATURE_TOPMEM
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| 77 | smallint sort_field;
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| 78 | smallint inverted;
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| 79 | #endif
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| 80 | #if ENABLE_FEATURE_TOP_SMP_CPU
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| 81 | smallint smp_cpu_info; /* one/many cpu info lines? */
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| 82 | #endif
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| 83 | #if ENABLE_FEATURE_USE_TERMIOS
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| 84 | struct termios initial_settings;
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| 85 | #endif
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| 86 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 87 | cmp_funcp sort_function[1];
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| 88 | #else
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| 89 | cmp_funcp sort_function[SORT_DEPTH];
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| 90 | struct save_hist *prev_hist;
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| 91 | int prev_hist_count;
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| 92 | jiffy_counts_t cur_jif, prev_jif;
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| 93 | /* int hist_iterations; */
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| 94 | unsigned total_pcpu;
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| 95 | /* unsigned long total_vsz; */
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| 96 | #endif
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| 97 | #if ENABLE_FEATURE_TOP_SMP_CPU
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| 98 | /* Per CPU samples: current and last */
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| 99 | jiffy_counts_t *cpu_jif, *cpu_prev_jif;
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| 100 | int num_cpus;
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| 101 | #endif
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| 102 | char line_buf[80];
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| 103 | }; //FIX_ALIASING; - large code growth
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| 104 | enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
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| 105 | #define G (*(struct globals*)&bb_common_bufsiz1)
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| 106 | struct BUG_bad_size {
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| 107 | char BUG_G_too_big[sizeof(G) <= COMMON_BUFSIZE ? 1 : -1];
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| 108 | char BUG_line_buf_too_small[LINE_BUF_SIZE > 80 ? 1 : -1];
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| 109 | };
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| 110 | #define INIT_G() do { } while (0)
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| 111 | #define top (G.top )
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| 112 | #define ntop (G.ntop )
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| 113 | #define sort_field (G.sort_field )
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| 114 | #define inverted (G.inverted )
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| 115 | #define smp_cpu_info (G.smp_cpu_info )
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| 116 | #define initial_settings (G.initial_settings )
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| 117 | #define sort_function (G.sort_function )
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| 118 | #define prev_hist (G.prev_hist )
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| 119 | #define prev_hist_count (G.prev_hist_count )
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| 120 | #define cur_jif (G.cur_jif )
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| 121 | #define prev_jif (G.prev_jif )
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| 122 | #define cpu_jif (G.cpu_jif )
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| 123 | #define cpu_prev_jif (G.cpu_prev_jif )
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| 124 | #define num_cpus (G.num_cpus )
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| 125 | #define total_pcpu (G.total_pcpu )
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| 126 | #define line_buf (G.line_buf )
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| 127 |
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| 128 | enum {
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| 129 | OPT_d = (1 << 0),
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| 130 | OPT_n = (1 << 1),
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| 131 | OPT_b = (1 << 2),
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| 132 | OPT_m = (1 << 3),
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| 133 | OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
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| 134 | };
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| 135 | #define OPT_BATCH_MODE (option_mask32 & OPT_b)
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| 136 |
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| 137 |
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| 138 | #if ENABLE_FEATURE_USE_TERMIOS
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| 139 | static int pid_sort(top_status_t *P, top_status_t *Q)
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| 140 | {
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| 141 | /* Buggy wrt pids with high bit set */
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| 142 | /* (linux pids are in [1..2^15-1]) */
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| 143 | return (Q->pid - P->pid);
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| 144 | }
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| 145 | #endif
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| 146 |
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| 147 | static int mem_sort(top_status_t *P, top_status_t *Q)
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| 148 | {
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| 149 | /* We want to avoid unsigned->signed and truncation errors */
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| 150 | if (Q->vsz < P->vsz) return -1;
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| 151 | return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
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| 152 | }
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| 153 |
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| 154 |
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| 155 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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| 156 |
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| 157 | static int pcpu_sort(top_status_t *P, top_status_t *Q)
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| 158 | {
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| 159 | /* Buggy wrt ticks with high bit set */
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| 160 | /* Affects only processes for which ticks overflow */
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| 161 | return (int)Q->pcpu - (int)P->pcpu;
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| 162 | }
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| 163 |
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| 164 | static int time_sort(top_status_t *P, top_status_t *Q)
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| 165 | {
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| 166 | /* We want to avoid unsigned->signed and truncation errors */
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| 167 | if (Q->ticks < P->ticks) return -1;
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| 168 | return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
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| 169 | }
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| 170 |
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| 171 | static int mult_lvl_cmp(void* a, void* b)
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| 172 | {
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| 173 | int i, cmp_val;
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| 174 |
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| 175 | for (i = 0; i < SORT_DEPTH; i++) {
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| 176 | cmp_val = (*sort_function[i])(a, b);
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| 177 | if (cmp_val != 0)
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| 178 | return cmp_val;
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| 179 | }
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| 180 | return 0;
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| 181 | }
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| 182 |
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| 183 | static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
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| 184 | {
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| 185 | #if !ENABLE_FEATURE_TOP_SMP_CPU
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| 186 | static const char fmt[] = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
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| 187 | #else
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| 188 | static const char fmt[] = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
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| 189 | #endif
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| 190 | int ret;
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| 191 |
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| 192 | if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
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| 193 | return 0;
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| 194 | ret = sscanf(line_buf, fmt,
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| 195 | &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
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| 196 | &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
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| 197 | &p_jif->steal);
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| 198 | if (ret >= 4) {
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| 199 | p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
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| 200 | + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
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| 201 | /* procps 2.x does not count iowait as busy time */
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| 202 | p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
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| 203 | }
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| 204 |
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| 205 | return ret;
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| 206 | }
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| 207 |
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| 208 | static void get_jiffy_counts(void)
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| 209 | {
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| 210 | FILE* fp = xfopen_for_read("stat");
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| 211 |
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| 212 | /* We need to parse cumulative counts even if SMP CPU display is on,
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| 213 | * they are used to calculate per process CPU% */
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| 214 | prev_jif = cur_jif;
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| 215 | if (read_cpu_jiffy(fp, &cur_jif) < 4)
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| 216 | bb_error_msg_and_die("can't read /proc/stat");
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| 217 |
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| 218 | #if !ENABLE_FEATURE_TOP_SMP_CPU
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| 219 | fclose(fp);
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| 220 | return;
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| 221 | #else
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| 222 | if (!smp_cpu_info) {
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| 223 | fclose(fp);
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| 224 | return;
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| 225 | }
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| 226 |
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| 227 | if (!num_cpus) {
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| 228 | /* First time here. How many CPUs?
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| 229 | * There will be at least 1 /proc/stat line with cpu%d
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| 230 | */
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| 231 | while (1) {
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| 232 | cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
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| 233 | if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
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| 234 | break;
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| 235 | num_cpus++;
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| 236 | }
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| 237 | if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
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| 238 | smp_cpu_info = 0;
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| 239 |
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| 240 | cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
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| 241 |
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| 242 | /* Otherwise the first per cpu display shows all 100% idles */
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| 243 | usleep(50000);
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| 244 | } else { /* Non first time invocation */
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| 245 | jiffy_counts_t *tmp;
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| 246 | int i;
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| 247 |
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| 248 | /* First switch the sample pointers: no need to copy */
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| 249 | tmp = cpu_prev_jif;
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| 250 | cpu_prev_jif = cpu_jif;
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| 251 | cpu_jif = tmp;
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| 252 |
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| 253 | /* Get the new samples */
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| 254 | for (i = 0; i < num_cpus; i++)
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| 255 | read_cpu_jiffy(fp, &cpu_jif[i]);
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| 256 | }
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| 257 | #endif
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| 258 | fclose(fp);
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| 259 | }
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| 260 |
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| 261 | static void do_stats(void)
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| 262 | {
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| 263 | top_status_t *cur;
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| 264 | pid_t pid;
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| 265 | int i, last_i, n;
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| 266 | struct save_hist *new_hist;
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| 267 |
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| 268 | get_jiffy_counts();
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| 269 | total_pcpu = 0;
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| 270 | /* total_vsz = 0; */
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| 271 | new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
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| 272 | /*
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| 273 | * Make a pass through the data to get stats.
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| 274 | */
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| 275 | /* hist_iterations = 0; */
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| 276 | i = 0;
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| 277 | for (n = 0; n < ntop; n++) {
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| 278 | cur = top + n;
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| 279 |
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| 280 | /*
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| 281 | * Calculate time in cur process. Time is sum of user time
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| 282 | * and system time
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| 283 | */
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| 284 | pid = cur->pid;
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| 285 | new_hist[n].ticks = cur->ticks;
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| 286 | new_hist[n].pid = pid;
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| 287 |
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| 288 | /* find matching entry from previous pass */
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| 289 | cur->pcpu = 0;
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| 290 | /* do not start at index 0, continue at last used one
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| 291 | * (brought hist_iterations from ~14000 down to 172) */
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| 292 | last_i = i;
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| 293 | if (prev_hist_count) do {
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| 294 | if (prev_hist[i].pid == pid) {
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| 295 | cur->pcpu = cur->ticks - prev_hist[i].ticks;
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| 296 | total_pcpu += cur->pcpu;
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| 297 | break;
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| 298 | }
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| 299 | i = (i+1) % prev_hist_count;
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| 300 | /* hist_iterations++; */
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| 301 | } while (i != last_i);
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| 302 | /* total_vsz += cur->vsz; */
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| 303 | }
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| 304 |
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| 305 | /*
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| 306 | * Save cur frame's information.
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| 307 | */
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| 308 | free(prev_hist);
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| 309 | prev_hist = new_hist;
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| 310 | prev_hist_count = ntop;
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| 311 | }
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| 312 |
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| 313 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
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| 314 |
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| 315 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
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| 316 | /* formats 7 char string (8 with terminating NUL) */
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| 317 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
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| 318 | {
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| 319 | unsigned t;
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| 320 | if (value >= total) { /* 100% ? */
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| 321 | strcpy(pbuf, " 100% ");
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| 322 | return pbuf;
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| 323 | }
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| 324 | /* else generate " [N/space]N.N% " string */
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| 325 | value = 1000 * value / total;
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| 326 | t = value / 100;
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| 327 | value = value % 100;
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| 328 | pbuf[0] = ' ';
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| 329 | pbuf[1] = t ? t + '0' : ' ';
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| 330 | pbuf[2] = '0' + (value / 10);
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| 331 | pbuf[3] = '.';
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| 332 | pbuf[4] = '0' + (value % 10);
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| 333 | pbuf[5] = '%';
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| 334 | pbuf[6] = ' ';
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| 335 | pbuf[7] = '\0';
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| 336 | return pbuf;
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| 337 | }
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| 338 | #endif
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| 339 |
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| 340 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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| 341 | static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
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| 342 | {
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| 343 | /*
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| 344 | * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
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| 345 | */
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| 346 | unsigned total_diff;
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| 347 | jiffy_counts_t *p_jif, *p_prev_jif;
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| 348 | int i;
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| 349 | # if ENABLE_FEATURE_TOP_SMP_CPU
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| 350 | int n_cpu_lines;
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| 351 | # endif
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| 352 |
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| 353 | /* using (unsigned) casts to make operations cheaper */
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| 354 | # define CALC_TOTAL_DIFF do { \
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| 355 | total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
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| 356 | if (total_diff == 0) total_diff = 1; \
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| 357 | } while (0)
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| 358 |
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| 359 | # if ENABLE_FEATURE_TOP_DECIMALS
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| 360 | # define CALC_STAT(xxx) char xxx[8]
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| 361 | # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
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| 362 | # define FMT "%s"
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| 363 | # else
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| 364 | # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
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| 365 | # define SHOW_STAT(xxx) xxx
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| 366 | # define FMT "%4u%% "
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| 367 | # endif
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| 368 |
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| 369 | # if !ENABLE_FEATURE_TOP_SMP_CPU
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| 370 | {
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| 371 | i = 1;
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| 372 | p_jif = &cur_jif;
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| 373 | p_prev_jif = &prev_jif;
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| 374 | # else
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| 375 | /* Loop thru CPU(s) */
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| 376 | n_cpu_lines = smp_cpu_info ? num_cpus : 1;
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| 377 | if (n_cpu_lines > *lines_rem_p)
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| 378 | n_cpu_lines = *lines_rem_p;
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| 379 |
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| 380 | for (i = 0; i < n_cpu_lines; i++) {
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| 381 | p_jif = &cpu_jif[i];
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| 382 | p_prev_jif = &cpu_prev_jif[i];
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| 383 | # endif
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| 384 | CALC_TOTAL_DIFF;
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| 385 |
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| 386 | { /* Need a block: CALC_STAT are declarations */
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| 387 | CALC_STAT(usr);
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| 388 | CALC_STAT(sys);
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| 389 | CALC_STAT(nic);
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| 390 | CALC_STAT(idle);
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| 391 | CALC_STAT(iowait);
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| 392 | CALC_STAT(irq);
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| 393 | CALC_STAT(softirq);
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| 394 | /*CALC_STAT(steal);*/
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| 395 |
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| 396 | snprintf(scrbuf, scr_width,
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| 397 | /* Barely fits in 79 chars when in "decimals" mode. */
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| 398 | # if ENABLE_FEATURE_TOP_SMP_CPU
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| 399 | "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
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| 400 | (smp_cpu_info ? utoa(i) : ""),
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| 401 | # else
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| 402 | "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
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| 403 | # endif
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| 404 | SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
|
---|
| 405 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
|
---|
| 406 | /*, SHOW_STAT(steal) - what is this 'steal' thing? */
|
---|
| 407 | /* I doubt anyone wants to know it */
|
---|
| 408 | );
|
---|
| 409 | puts(scrbuf);
|
---|
| 410 | }
|
---|
| 411 | }
|
---|
| 412 | # undef SHOW_STAT
|
---|
| 413 | # undef CALC_STAT
|
---|
| 414 | # undef FMT
|
---|
| 415 | *lines_rem_p -= i;
|
---|
| 416 | }
|
---|
| 417 | #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
|
---|
| 418 | # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
|
---|
| 419 | #endif
|
---|
| 420 |
|
---|
| 421 | static unsigned long display_header(int scr_width, int *lines_rem_p)
|
---|
| 422 | {
|
---|
| 423 | FILE *fp;
|
---|
| 424 | char buf[80];
|
---|
| 425 | char scrbuf[80];
|
---|
| 426 | unsigned long total, used, mfree, shared, buffers, cached;
|
---|
| 427 |
|
---|
| 428 | /* read memory info */
|
---|
| 429 | fp = xfopen_for_read("meminfo");
|
---|
| 430 |
|
---|
| 431 | /*
|
---|
| 432 | * Old kernels (such as 2.4.x) had a nice summary of memory info that
|
---|
| 433 | * we could parse, however this is gone entirely in 2.6. Try parsing
|
---|
| 434 | * the old way first, and if that fails, parse each field manually.
|
---|
| 435 | *
|
---|
| 436 | * First, we read in the first line. Old kernels will have bogus
|
---|
| 437 | * strings we don't care about, whereas new kernels will start right
|
---|
| 438 | * out with MemTotal:
|
---|
| 439 | * -- PFM.
|
---|
| 440 | */
|
---|
| 441 | if (fscanf(fp, "MemTotal: %lu %s\n", &total, buf) != 2) {
|
---|
| 442 | fgets(buf, sizeof(buf), fp); /* skip first line */
|
---|
| 443 |
|
---|
| 444 | fscanf(fp, "Mem: %lu %lu %lu %lu %lu %lu",
|
---|
| 445 | &total, &used, &mfree, &shared, &buffers, &cached);
|
---|
| 446 | /* convert to kilobytes */
|
---|
| 447 | used /= 1024;
|
---|
| 448 | mfree /= 1024;
|
---|
| 449 | shared /= 1024;
|
---|
| 450 | buffers /= 1024;
|
---|
| 451 | cached /= 1024;
|
---|
| 452 | total /= 1024;
|
---|
| 453 | } else {
|
---|
| 454 | /*
|
---|
| 455 | * Revert to manual parsing, which incidentally already has the
|
---|
| 456 | * sizes in kilobytes. This should be safe for both 2.4 and
|
---|
| 457 | * 2.6.
|
---|
| 458 | */
|
---|
| 459 | fscanf(fp, "MemFree: %lu %s\n", &mfree, buf);
|
---|
| 460 |
|
---|
| 461 | /*
|
---|
| 462 | * MemShared: is no longer present in 2.6. Report this as 0,
|
---|
| 463 | * to maintain consistent behavior with normal procps.
|
---|
| 464 | */
|
---|
| 465 | if (fscanf(fp, "MemShared: %lu %s\n", &shared, buf) != 2)
|
---|
| 466 | shared = 0;
|
---|
| 467 |
|
---|
| 468 | fscanf(fp, "Buffers: %lu %s\n", &buffers, buf);
|
---|
| 469 | fscanf(fp, "Cached: %lu %s\n", &cached, buf);
|
---|
| 470 |
|
---|
| 471 | used = total - mfree;
|
---|
| 472 | }
|
---|
| 473 | fclose(fp);
|
---|
| 474 |
|
---|
| 475 | /* output memory info */
|
---|
| 476 | if (scr_width > (int)sizeof(scrbuf))
|
---|
| 477 | scr_width = sizeof(scrbuf);
|
---|
| 478 | snprintf(scrbuf, scr_width,
|
---|
| 479 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
---|
| 480 | used, mfree, shared, buffers, cached);
|
---|
| 481 | /* go to top & clear to the end of screen */
|
---|
| 482 | printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
|
---|
| 483 | (*lines_rem_p)--;
|
---|
| 484 |
|
---|
| 485 | /* Display CPU time split as percentage of total time
|
---|
| 486 | * This displays either a cumulative line or one line per CPU
|
---|
| 487 | */
|
---|
| 488 | display_cpus(scr_width, scrbuf, lines_rem_p);
|
---|
| 489 |
|
---|
| 490 | /* read load average as a string */
|
---|
| 491 | buf[0] = '\0';
|
---|
| 492 | open_read_close("loadavg", buf, sizeof(buf) - 1);
|
---|
| 493 | buf[sizeof(buf) - 1] = '\n';
|
---|
| 494 | *strchr(buf, '\n') = '\0';
|
---|
| 495 | snprintf(scrbuf, scr_width, "Load average: %s", buf);
|
---|
| 496 | puts(scrbuf);
|
---|
| 497 | (*lines_rem_p)--;
|
---|
| 498 |
|
---|
| 499 | return total;
|
---|
| 500 | }
|
---|
| 501 |
|
---|
| 502 | static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
---|
| 503 | {
|
---|
| 504 | enum {
|
---|
| 505 | BITS_PER_INT = sizeof(int) * 8
|
---|
| 506 | };
|
---|
| 507 |
|
---|
| 508 | top_status_t *s;
|
---|
| 509 | char vsz_str_buf[8];
|
---|
| 510 | unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
|
---|
| 511 | /* xxx_shift and xxx_scale variables allow us to replace
|
---|
| 512 | * expensive divides with multiply and shift */
|
---|
| 513 | unsigned pmem_shift, pmem_scale, pmem_half;
|
---|
| 514 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 515 | unsigned tmp_unsigned;
|
---|
| 516 | unsigned pcpu_shift, pcpu_scale, pcpu_half;
|
---|
| 517 | unsigned busy_jifs;
|
---|
| 518 | #endif
|
---|
| 519 |
|
---|
| 520 | /* what info of the processes is shown */
|
---|
| 521 | printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
|
---|
| 522 | " PID PPID USER STAT VSZ %MEM"
|
---|
| 523 | IF_FEATURE_TOP_SMP_PROCESS(" CPU")
|
---|
| 524 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
|
---|
| 525 | " COMMAND");
|
---|
| 526 | lines_rem--;
|
---|
| 527 |
|
---|
| 528 | #if ENABLE_FEATURE_TOP_DECIMALS
|
---|
| 529 | # define UPSCALE 1000
|
---|
| 530 | # define CALC_STAT(name, val) div_t name = div((val), 10)
|
---|
| 531 | # define SHOW_STAT(name) name.quot, '0'+name.rem
|
---|
| 532 | # define FMT "%3u.%c"
|
---|
| 533 | #else
|
---|
| 534 | # define UPSCALE 100
|
---|
| 535 | # define CALC_STAT(name, val) unsigned name = (val)
|
---|
| 536 | # define SHOW_STAT(name) name
|
---|
| 537 | # define FMT "%4u%%"
|
---|
| 538 | #endif
|
---|
| 539 | /*
|
---|
| 540 | * MEM% = s->vsz/MemTotal
|
---|
| 541 | */
|
---|
| 542 | pmem_shift = BITS_PER_INT-11;
|
---|
| 543 | pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
|
---|
| 544 | /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
|
---|
| 545 | while (pmem_scale >= 512) {
|
---|
| 546 | pmem_scale /= 4;
|
---|
| 547 | pmem_shift -= 2;
|
---|
| 548 | }
|
---|
| 549 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
|
---|
| 550 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 551 | busy_jifs = cur_jif.busy - prev_jif.busy;
|
---|
| 552 | /* This happens if there were lots of short-lived processes
|
---|
| 553 | * between two top updates (e.g. compilation) */
|
---|
| 554 | if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
|
---|
| 555 |
|
---|
| 556 | /*
|
---|
| 557 | * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
|
---|
| 558 | * (pcpu is delta of sys+user time between samples)
|
---|
| 559 | */
|
---|
| 560 | /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
|
---|
| 561 | * in 0..~64000 range (HZ*update_interval).
|
---|
| 562 | * we assume that unsigned is at least 32-bit.
|
---|
| 563 | */
|
---|
| 564 | pcpu_shift = 6;
|
---|
| 565 | pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
|
---|
| 566 | if (pcpu_scale == 0)
|
---|
| 567 | pcpu_scale = 1;
|
---|
| 568 | while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
|
---|
| 569 | pcpu_scale *= 4;
|
---|
| 570 | pcpu_shift += 2;
|
---|
| 571 | }
|
---|
| 572 | tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
|
---|
| 573 | if (tmp_unsigned != 0)
|
---|
| 574 | pcpu_scale /= tmp_unsigned;
|
---|
| 575 | /* we want (s->pcpu * pcpu_scale) to never overflow */
|
---|
| 576 | while (pcpu_scale >= 1024) {
|
---|
| 577 | pcpu_scale /= 4;
|
---|
| 578 | pcpu_shift -= 2;
|
---|
| 579 | }
|
---|
| 580 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS? 20 : 2);
|
---|
| 581 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
---|
| 582 | #endif
|
---|
| 583 |
|
---|
| 584 | /* Ok, all preliminary data is ready, go through the list */
|
---|
| 585 | scr_width += 2; /* account for leading '\n' and trailing NUL */
|
---|
| 586 | if (lines_rem > ntop)
|
---|
| 587 | lines_rem = ntop;
|
---|
| 588 | s = top;
|
---|
| 589 | while (--lines_rem >= 0) {
|
---|
| 590 | unsigned col;
|
---|
| 591 | CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
|
---|
| 592 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 593 | CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
|
---|
| 594 | #endif
|
---|
| 595 |
|
---|
| 596 | if (s->vsz >= 100000)
|
---|
| 597 | sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
|
---|
| 598 | else
|
---|
| 599 | sprintf(vsz_str_buf, "%7ld", s->vsz);
|
---|
| 600 | /* PID PPID USER STAT VSZ %MEM [%CPU] COMMAND */
|
---|
| 601 | col = snprintf(line_buf, scr_width,
|
---|
| 602 | "\n" "%5u%6u %-8.8s %s%s" FMT
|
---|
| 603 | IF_FEATURE_TOP_SMP_PROCESS(" %3d")
|
---|
| 604 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
|
---|
| 605 | " ",
|
---|
| 606 | s->pid, s->ppid, get_cached_username(s->uid),
|
---|
| 607 | s->state, vsz_str_buf,
|
---|
| 608 | SHOW_STAT(pmem)
|
---|
| 609 | IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
|
---|
| 610 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
|
---|
| 611 | );
|
---|
| 612 | if ((int)(col + 1) < scr_width)
|
---|
| 613 | read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
|
---|
| 614 | fputs(line_buf, stdout);
|
---|
| 615 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
---|
| 616 | cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
---|
| 617 | s++;
|
---|
| 618 | }
|
---|
| 619 | /* printf(" %d", hist_iterations); */
|
---|
| 620 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
| 621 | fflush_all();
|
---|
| 622 | }
|
---|
| 623 | #undef UPSCALE
|
---|
| 624 | #undef SHOW_STAT
|
---|
| 625 | #undef CALC_STAT
|
---|
| 626 | #undef FMT
|
---|
| 627 |
|
---|
| 628 | static void clearmems(void)
|
---|
| 629 | {
|
---|
| 630 | clear_username_cache();
|
---|
| 631 | free(top);
|
---|
| 632 | top = NULL;
|
---|
| 633 | ntop = 0;
|
---|
| 634 | }
|
---|
| 635 |
|
---|
| 636 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 637 |
|
---|
| 638 | static void reset_term(void)
|
---|
| 639 | {
|
---|
| 640 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
| 641 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 642 | clearmems();
|
---|
| 643 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 644 | free(prev_hist);
|
---|
| 645 | # endif
|
---|
| 646 | }
|
---|
| 647 | }
|
---|
| 648 |
|
---|
| 649 | static void sig_catcher(int sig UNUSED_PARAM)
|
---|
| 650 | {
|
---|
| 651 | reset_term();
|
---|
| 652 | _exit(EXIT_FAILURE);
|
---|
| 653 | }
|
---|
| 654 |
|
---|
| 655 | #endif /* FEATURE_USE_TERMIOS */
|
---|
| 656 |
|
---|
| 657 | /*
|
---|
| 658 | * TOPMEM support
|
---|
| 659 | */
|
---|
| 660 |
|
---|
| 661 | typedef unsigned long mem_t;
|
---|
| 662 |
|
---|
| 663 | typedef struct topmem_status_t {
|
---|
| 664 | unsigned pid;
|
---|
| 665 | char comm[COMM_LEN];
|
---|
| 666 | /* vsz doesn't count /dev/xxx mappings except /dev/zero */
|
---|
| 667 | mem_t vsz ;
|
---|
| 668 | mem_t vszrw ;
|
---|
| 669 | mem_t rss ;
|
---|
| 670 | mem_t rss_sh ;
|
---|
| 671 | mem_t dirty ;
|
---|
| 672 | mem_t dirty_sh;
|
---|
| 673 | mem_t stack ;
|
---|
| 674 | } topmem_status_t;
|
---|
| 675 |
|
---|
| 676 | enum { NUM_SORT_FIELD = 7 };
|
---|
| 677 |
|
---|
| 678 | #define topmem ((topmem_status_t*)top)
|
---|
| 679 |
|
---|
| 680 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 681 |
|
---|
| 682 | static int topmem_sort(char *a, char *b)
|
---|
| 683 | {
|
---|
| 684 | int n;
|
---|
| 685 | mem_t l, r;
|
---|
| 686 |
|
---|
| 687 | n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
|
---|
| 688 | l = *(mem_t*)(a + n);
|
---|
| 689 | r = *(mem_t*)(b + n);
|
---|
| 690 | if (l == r) {
|
---|
| 691 | l = ((topmem_status_t*)a)->dirty;
|
---|
| 692 | r = ((topmem_status_t*)b)->dirty;
|
---|
| 693 | }
|
---|
| 694 | /* We want to avoid unsigned->signed and truncation errors */
|
---|
| 695 | /* l>r: -1, l=r: 0, l<r: 1 */
|
---|
| 696 | n = (l > r) ? -1 : (l != r);
|
---|
| 697 | return inverted ? -n : n;
|
---|
| 698 | }
|
---|
| 699 |
|
---|
| 700 | /* display header info (meminfo / loadavg) */
|
---|
| 701 | static void display_topmem_header(int scr_width, int *lines_rem_p)
|
---|
| 702 | {
|
---|
| 703 | enum {
|
---|
| 704 | TOTAL = 0, MFREE, BUF, CACHE,
|
---|
| 705 | SWAPTOTAL, SWAPFREE, DIRTY,
|
---|
| 706 | MWRITE, ANON, MAP, SLAB,
|
---|
| 707 | NUM_FIELDS
|
---|
| 708 | };
|
---|
| 709 | static const char match[NUM_FIELDS][12] = {
|
---|
| 710 | "\x09" "MemTotal:", // TOTAL
|
---|
| 711 | "\x08" "MemFree:", // MFREE
|
---|
| 712 | "\x08" "Buffers:", // BUF
|
---|
| 713 | "\x07" "Cached:", // CACHE
|
---|
| 714 | "\x0a" "SwapTotal:", // SWAPTOTAL
|
---|
| 715 | "\x09" "SwapFree:", // SWAPFREE
|
---|
| 716 | "\x06" "Dirty:", // DIRTY
|
---|
| 717 | "\x0a" "Writeback:", // MWRITE
|
---|
| 718 | "\x0a" "AnonPages:", // ANON
|
---|
| 719 | "\x07" "Mapped:", // MAP
|
---|
| 720 | "\x05" "Slab:", // SLAB
|
---|
| 721 | };
|
---|
| 722 | char meminfo_buf[4 * 1024];
|
---|
| 723 | const char *Z[NUM_FIELDS];
|
---|
| 724 | unsigned i;
|
---|
| 725 | int sz;
|
---|
| 726 |
|
---|
| 727 | for (i = 0; i < NUM_FIELDS; i++)
|
---|
| 728 | Z[i] = "?";
|
---|
| 729 |
|
---|
| 730 | /* read memory info */
|
---|
| 731 | sz = open_read_close("meminfo", meminfo_buf, sizeof(meminfo_buf) - 1);
|
---|
| 732 | if (sz >= 0) {
|
---|
| 733 | char *p = meminfo_buf;
|
---|
| 734 | meminfo_buf[sz] = '\0';
|
---|
| 735 | /* Note that fields always appear in the match[] order */
|
---|
| 736 | for (i = 0; i < NUM_FIELDS; i++) {
|
---|
| 737 | char *found = strstr(p, match[i] + 1);
|
---|
| 738 | if (found) {
|
---|
| 739 | /* Cut "NNNN" out of " NNNN kb" */
|
---|
| 740 | char *s = skip_whitespace(found + match[i][0]);
|
---|
| 741 | p = skip_non_whitespace(s);
|
---|
| 742 | *p++ = '\0';
|
---|
| 743 | Z[i] = s;
|
---|
| 744 | }
|
---|
| 745 | }
|
---|
| 746 | }
|
---|
| 747 |
|
---|
| 748 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
| 749 | "Mem total:%s anon:%s map:%s free:%s",
|
---|
| 750 | Z[TOTAL], Z[ANON], Z[MAP], Z[MFREE]);
|
---|
| 751 | printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
|
---|
| 752 |
|
---|
| 753 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
| 754 | " slab:%s buf:%s cache:%s dirty:%s write:%s",
|
---|
| 755 | Z[SLAB], Z[BUF], Z[CACHE], Z[DIRTY], Z[MWRITE]);
|
---|
| 756 | printf("%.*s\n", scr_width, line_buf);
|
---|
| 757 |
|
---|
| 758 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
| 759 | "Swap total:%s free:%s", // TODO: % used?
|
---|
| 760 | Z[SWAPTOTAL], Z[SWAPFREE]);
|
---|
| 761 | printf("%.*s\n", scr_width, line_buf);
|
---|
| 762 |
|
---|
| 763 | (*lines_rem_p) -= 3;
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 | static void ulltoa6_and_space(unsigned long long ul, char buf[6])
|
---|
| 767 | {
|
---|
| 768 | /* see http://en.wikipedia.org/wiki/Tera */
|
---|
| 769 | smart_ulltoa5(ul, buf, " mgtpezy");
|
---|
| 770 | buf[5] = ' ';
|
---|
| 771 | }
|
---|
| 772 |
|
---|
| 773 | static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
|
---|
| 774 | {
|
---|
| 775 | #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
|
---|
| 776 | #define MIN_WIDTH sizeof(HDR_STR)
|
---|
| 777 | const topmem_status_t *s = topmem;
|
---|
| 778 |
|
---|
| 779 | display_topmem_header(scr_width, &lines_rem);
|
---|
| 780 | strcpy(line_buf, HDR_STR " COMMAND");
|
---|
| 781 | line_buf[5 + sort_field * 6] = '*';
|
---|
| 782 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
---|
| 783 | lines_rem--;
|
---|
| 784 |
|
---|
| 785 | if (lines_rem > ntop)
|
---|
| 786 | lines_rem = ntop;
|
---|
| 787 | while (--lines_rem >= 0) {
|
---|
| 788 | /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
|
---|
| 789 | ulltoa6_and_space(s->pid , &line_buf[0*6]);
|
---|
| 790 | ulltoa6_and_space(s->vsz , &line_buf[1*6]);
|
---|
| 791 | ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
|
---|
| 792 | ulltoa6_and_space(s->rss , &line_buf[3*6]);
|
---|
| 793 | ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
|
---|
| 794 | ulltoa6_and_space(s->dirty , &line_buf[5*6]);
|
---|
| 795 | ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
|
---|
| 796 | ulltoa6_and_space(s->stack , &line_buf[7*6]);
|
---|
| 797 | line_buf[8*6] = '\0';
|
---|
| 798 | if (scr_width > (int)MIN_WIDTH) {
|
---|
| 799 | read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
|
---|
| 800 | }
|
---|
| 801 | printf("\n""%.*s", scr_width, line_buf);
|
---|
| 802 | s++;
|
---|
| 803 | }
|
---|
| 804 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
| 805 | fflush_all();
|
---|
| 806 | #undef HDR_STR
|
---|
| 807 | #undef MIN_WIDTH
|
---|
| 808 | }
|
---|
| 809 |
|
---|
| 810 | #else
|
---|
| 811 | void display_topmem_process_list(int lines_rem, int scr_width);
|
---|
| 812 | int topmem_sort(char *a, char *b);
|
---|
| 813 | #endif /* TOPMEM */
|
---|
| 814 |
|
---|
| 815 | /*
|
---|
| 816 | * end TOPMEM support
|
---|
| 817 | */
|
---|
| 818 |
|
---|
| 819 | enum {
|
---|
| 820 | TOP_MASK = 0
|
---|
| 821 | | PSSCAN_PID
|
---|
| 822 | | PSSCAN_PPID
|
---|
| 823 | | PSSCAN_VSZ
|
---|
| 824 | | PSSCAN_STIME
|
---|
| 825 | | PSSCAN_UTIME
|
---|
| 826 | | PSSCAN_STATE
|
---|
| 827 | | PSSCAN_COMM
|
---|
| 828 | | PSSCAN_CPU
|
---|
| 829 | | PSSCAN_UIDGID,
|
---|
| 830 | TOPMEM_MASK = 0
|
---|
| 831 | | PSSCAN_PID
|
---|
| 832 | | PSSCAN_SMAPS
|
---|
| 833 | | PSSCAN_COMM,
|
---|
| 834 | };
|
---|
| 835 |
|
---|
| 836 | int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
| 837 | int top_main(int argc UNUSED_PARAM, char **argv)
|
---|
| 838 | {
|
---|
| 839 | int iterations;
|
---|
| 840 | unsigned lines, col;
|
---|
| 841 | int lines_rem;
|
---|
| 842 | unsigned interval;
|
---|
| 843 | char *str_interval, *str_iterations;
|
---|
| 844 | unsigned scan_mask = TOP_MASK;
|
---|
| 845 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 846 | struct termios new_settings;
|
---|
| 847 | struct pollfd pfd[1];
|
---|
| 848 | unsigned char c;
|
---|
| 849 |
|
---|
| 850 | pfd[0].fd = 0;
|
---|
| 851 | pfd[0].events = POLLIN;
|
---|
| 852 | #endif
|
---|
| 853 |
|
---|
| 854 | INIT_G();
|
---|
| 855 |
|
---|
| 856 | interval = 5; /* default update interval is 5 seconds */
|
---|
| 857 | iterations = 0; /* infinite */
|
---|
| 858 | #if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
| 859 | /*num_cpus = 0;*/
|
---|
| 860 | /*smp_cpu_info = 0;*/ /* to start with show aggregate */
|
---|
| 861 | cpu_jif = &cur_jif;
|
---|
| 862 | cpu_prev_jif = &prev_jif;
|
---|
| 863 | #endif
|
---|
| 864 |
|
---|
| 865 | /* all args are options; -n NUM */
|
---|
| 866 | opt_complementary = "-"; /* options can be specified w/o dash */
|
---|
| 867 | col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
|
---|
| 868 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 869 | if (col & OPT_m) /* -m (busybox specific) */
|
---|
| 870 | scan_mask = TOPMEM_MASK;
|
---|
| 871 | #endif
|
---|
| 872 | if (col & OPT_d) {
|
---|
| 873 | /* work around for "-d 1" -> "-d -1" done by getopt32
|
---|
| 874 | * (opt_complementary == "-" does this) */
|
---|
| 875 | if (str_interval[0] == '-')
|
---|
| 876 | str_interval++;
|
---|
| 877 | /* Need to limit it to not overflow poll timeout */
|
---|
| 878 | interval = xatou16(str_interval);
|
---|
| 879 | }
|
---|
| 880 | if (col & OPT_n) {
|
---|
| 881 | if (str_iterations[0] == '-')
|
---|
| 882 | str_iterations++;
|
---|
| 883 | iterations = xatou(str_iterations);
|
---|
| 884 | }
|
---|
| 885 |
|
---|
| 886 | /* change to /proc */
|
---|
| 887 | xchdir("/proc");
|
---|
| 888 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 889 | tcgetattr(0, (void *) &initial_settings);
|
---|
| 890 | memcpy(&new_settings, &initial_settings, sizeof(new_settings));
|
---|
| 891 | /* unbuffered input, turn off echo */
|
---|
| 892 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
---|
| 893 |
|
---|
| 894 | bb_signals(BB_FATAL_SIGS, sig_catcher);
|
---|
| 895 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
| 896 | #endif
|
---|
| 897 |
|
---|
| 898 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 899 | sort_function[0] = pcpu_sort;
|
---|
| 900 | sort_function[1] = mem_sort;
|
---|
| 901 | sort_function[2] = time_sort;
|
---|
| 902 | #else
|
---|
| 903 | sort_function[0] = mem_sort;
|
---|
| 904 | #endif
|
---|
| 905 |
|
---|
| 906 | while (1) {
|
---|
| 907 | procps_status_t *p = NULL;
|
---|
| 908 |
|
---|
| 909 | lines = 24; /* default */
|
---|
| 910 | col = 79;
|
---|
| 911 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 912 | /* We output to stdout, we need size of stdout (not stdin)! */
|
---|
| 913 | get_terminal_width_height(STDOUT_FILENO, &col, &lines);
|
---|
| 914 | if (lines < 5 || col < 10) {
|
---|
| 915 | sleep(interval);
|
---|
| 916 | continue;
|
---|
| 917 | }
|
---|
| 918 | #endif
|
---|
| 919 | if (col > LINE_BUF_SIZE-2) /* +2 bytes for '\n', NUL, */
|
---|
| 920 | col = LINE_BUF_SIZE-2;
|
---|
| 921 |
|
---|
| 922 | /* read process IDs & status for all the processes */
|
---|
| 923 | while ((p = procps_scan(p, scan_mask)) != NULL) {
|
---|
| 924 | int n;
|
---|
| 925 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 926 | if (scan_mask != TOPMEM_MASK)
|
---|
| 927 | #endif
|
---|
| 928 | {
|
---|
| 929 | n = ntop;
|
---|
| 930 | top = xrealloc_vector(top, 6, ntop++);
|
---|
| 931 | top[n].pid = p->pid;
|
---|
| 932 | top[n].ppid = p->ppid;
|
---|
| 933 | top[n].vsz = p->vsz;
|
---|
| 934 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 935 | top[n].ticks = p->stime + p->utime;
|
---|
| 936 | #endif
|
---|
| 937 | top[n].uid = p->uid;
|
---|
| 938 | strcpy(top[n].state, p->state);
|
---|
| 939 | strcpy(top[n].comm, p->comm);
|
---|
| 940 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
|
---|
| 941 | top[n].last_seen_on_cpu = p->last_seen_on_cpu;
|
---|
| 942 | #endif
|
---|
| 943 | }
|
---|
| 944 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 945 | else { /* TOPMEM */
|
---|
| 946 | if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
|
---|
| 947 | continue; /* kernel threads are ignored */
|
---|
| 948 | n = ntop;
|
---|
| 949 | /* No bug here - top and topmem are the same */
|
---|
| 950 | top = xrealloc_vector(topmem, 6, ntop++);
|
---|
| 951 | strcpy(topmem[n].comm, p->comm);
|
---|
| 952 | topmem[n].pid = p->pid;
|
---|
| 953 | topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
|
---|
| 954 | topmem[n].vszrw = p->smaps.mapped_rw;
|
---|
| 955 | topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
|
---|
| 956 | topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
|
---|
| 957 | topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
|
---|
| 958 | topmem[n].dirty_sh = p->smaps.shared_dirty;
|
---|
| 959 | topmem[n].stack = p->smaps.stack;
|
---|
| 960 | }
|
---|
| 961 | #endif
|
---|
| 962 | } /* end of "while we read /proc" */
|
---|
| 963 | if (ntop == 0) {
|
---|
| 964 | bb_error_msg("no process info in /proc");
|
---|
| 965 | break;
|
---|
| 966 | }
|
---|
| 967 |
|
---|
| 968 | if (scan_mask != TOPMEM_MASK) {
|
---|
| 969 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 970 | if (!prev_hist_count) {
|
---|
| 971 | do_stats();
|
---|
| 972 | usleep(100000);
|
---|
| 973 | clearmems();
|
---|
| 974 | continue;
|
---|
| 975 | }
|
---|
| 976 | do_stats();
|
---|
| 977 | /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
---|
| 978 | qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
---|
| 979 | #else
|
---|
| 980 | qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
---|
| 981 | #endif
|
---|
| 982 | }
|
---|
| 983 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 984 | else { /* TOPMEM */
|
---|
| 985 | qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
---|
| 986 | }
|
---|
| 987 | #endif
|
---|
| 988 | lines_rem = lines;
|
---|
| 989 | if (OPT_BATCH_MODE) {
|
---|
| 990 | lines_rem = INT_MAX;
|
---|
| 991 | }
|
---|
| 992 | if (scan_mask != TOPMEM_MASK)
|
---|
| 993 | display_process_list(lines_rem, col);
|
---|
| 994 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 995 | else
|
---|
| 996 | display_topmem_process_list(lines_rem, col);
|
---|
| 997 | #endif
|
---|
| 998 | clearmems();
|
---|
| 999 | if (iterations >= 0 && !--iterations)
|
---|
| 1000 | break;
|
---|
| 1001 | #if !ENABLE_FEATURE_USE_TERMIOS
|
---|
| 1002 | sleep(interval);
|
---|
| 1003 | #else
|
---|
| 1004 | if (option_mask32 & (OPT_b|OPT_EOF))
|
---|
| 1005 | /* batch mode, or EOF on stdin ("top </dev/null") */
|
---|
| 1006 | sleep(interval);
|
---|
| 1007 | else if (safe_poll(pfd, 1, interval * 1000) > 0) {
|
---|
| 1008 | if (safe_read(STDIN_FILENO, &c, 1) != 1) { /* error/EOF? */
|
---|
| 1009 | option_mask32 |= OPT_EOF;
|
---|
| 1010 | continue;
|
---|
| 1011 | }
|
---|
| 1012 | if (c == initial_settings.c_cc[VINTR])
|
---|
| 1013 | break;
|
---|
| 1014 | c |= 0x20; /* lowercase */
|
---|
| 1015 | if (c == 'q')
|
---|
| 1016 | break;
|
---|
| 1017 | if (c == 'n') {
|
---|
| 1018 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
| 1019 | sort_function[0] = pid_sort;
|
---|
| 1020 | }
|
---|
| 1021 | if (c == 'm') {
|
---|
| 1022 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
| 1023 | sort_function[0] = mem_sort;
|
---|
| 1024 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 1025 | sort_function[1] = pcpu_sort;
|
---|
| 1026 | sort_function[2] = time_sort;
|
---|
| 1027 | # endif
|
---|
| 1028 | }
|
---|
| 1029 | # if ENABLE_FEATURE_SHOW_THREADS
|
---|
| 1030 | if (c == 'h'
|
---|
| 1031 | IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
|
---|
| 1032 | ) {
|
---|
| 1033 | scan_mask ^= PSSCAN_TASKS;
|
---|
| 1034 | }
|
---|
| 1035 | # endif
|
---|
| 1036 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 1037 | if (c == 'p') {
|
---|
| 1038 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
| 1039 | sort_function[0] = pcpu_sort;
|
---|
| 1040 | sort_function[1] = mem_sort;
|
---|
| 1041 | sort_function[2] = time_sort;
|
---|
| 1042 | }
|
---|
| 1043 | if (c == 't') {
|
---|
| 1044 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
| 1045 | sort_function[0] = time_sort;
|
---|
| 1046 | sort_function[1] = mem_sort;
|
---|
| 1047 | sort_function[2] = pcpu_sort;
|
---|
| 1048 | }
|
---|
| 1049 | # if ENABLE_FEATURE_TOPMEM
|
---|
| 1050 | if (c == 's') {
|
---|
| 1051 | scan_mask = TOPMEM_MASK;
|
---|
| 1052 | free(prev_hist);
|
---|
| 1053 | prev_hist = NULL;
|
---|
| 1054 | prev_hist_count = 0;
|
---|
| 1055 | sort_field = (sort_field + 1) % NUM_SORT_FIELD;
|
---|
| 1056 | }
|
---|
| 1057 | if (c == 'r')
|
---|
| 1058 | inverted ^= 1;
|
---|
| 1059 | # endif
|
---|
| 1060 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
| 1061 | /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
|
---|
| 1062 | if (c == 'c' || c == '1') {
|
---|
| 1063 | /* User wants to toggle per cpu <> aggregate */
|
---|
| 1064 | if (smp_cpu_info) {
|
---|
| 1065 | free(cpu_prev_jif);
|
---|
| 1066 | free(cpu_jif);
|
---|
| 1067 | cpu_jif = &cur_jif;
|
---|
| 1068 | cpu_prev_jif = &prev_jif;
|
---|
| 1069 | } else {
|
---|
| 1070 | /* Prepare for xrealloc() */
|
---|
| 1071 | cpu_jif = cpu_prev_jif = NULL;
|
---|
| 1072 | }
|
---|
| 1073 | num_cpus = 0;
|
---|
| 1074 | smp_cpu_info = !smp_cpu_info;
|
---|
| 1075 | get_jiffy_counts();
|
---|
| 1076 | }
|
---|
| 1077 | # endif
|
---|
| 1078 | # endif
|
---|
| 1079 | }
|
---|
| 1080 | #endif /* FEATURE_USE_TERMIOS */
|
---|
| 1081 | } /* end of "while (1)" */
|
---|
| 1082 |
|
---|
| 1083 | bb_putchar('\n');
|
---|
| 1084 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 1085 | reset_term();
|
---|
| 1086 | #endif
|
---|
| 1087 | return EXIT_SUCCESS;
|
---|
| 1088 | }
|
---|