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),
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405 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
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406 | /*, SHOW_STAT(steal) - what is this 'steal' thing? */
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407 | /* I doubt anyone wants to know it */
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408 | );
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409 | puts(scrbuf);
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410 | }
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411 | }
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412 | # undef SHOW_STAT
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413 | # undef CALC_STAT
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414 | # undef FMT
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415 | *lines_rem_p -= i;
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416 | }
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417 | #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
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418 | # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
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419 | #endif
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420 |
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421 | static unsigned long display_header(int scr_width, int *lines_rem_p)
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422 | {
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423 | FILE *fp;
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424 | char buf[80];
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425 | char scrbuf[80];
|
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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 | }
|
---|