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 | /* How to snapshot /proc for debugging top problems:
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34 | * for f in /proc/[0-9]*""/stat; do
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35 | * n=${f#/proc/}
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36 | * n=${n%/stat}_stat
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37 | * cp $f $n
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38 | * done
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39 | * cp /proc/stat /proc/meminfo /proc/loadavg .
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40 | * top -bn1 >top.out
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41 | *
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42 | * ...and how to run top on it on another machine:
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43 | * rm -rf proc; mkdir proc
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44 | * for f in [0-9]*_stat; do
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45 | * p=${f%_stat}
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46 | * mkdir -p proc/$p
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47 | * cp $f proc/$p/stat
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48 | * done
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49 | * cp stat meminfo loadavg proc
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50 | * chroot . ./top -bn1 >top1.out
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51 | */
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52 |
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53 | //config:config TOP
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54 | //config: bool "top"
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55 | //config: default y
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56 | //config: help
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57 | //config: The top program provides a dynamic real-time view of a running
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58 | //config: system.
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59 | //config:
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60 | //config:config FEATURE_TOP_CPU_USAGE_PERCENTAGE
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61 | //config: bool "Show CPU per-process usage percentage"
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62 | //config: default y
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63 | //config: depends on TOP
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64 | //config: help
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65 | //config: Make top display CPU usage for each process.
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66 | //config: This adds about 2k.
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67 | //config:
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68 | //config:config FEATURE_TOP_CPU_GLOBAL_PERCENTS
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69 | //config: bool "Show CPU global usage percentage"
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70 | //config: default y
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71 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
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72 | //config: help
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73 | //config: Makes top display "CPU: NN% usr NN% sys..." line.
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74 | //config: This adds about 0.5k.
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75 | //config:
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76 | //config:config FEATURE_TOP_SMP_CPU
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77 | //config: bool "SMP CPU usage display ('c' key)"
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78 | //config: default y
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79 | //config: depends on FEATURE_TOP_CPU_GLOBAL_PERCENTS
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80 | //config: help
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81 | //config: Allow 'c' key to switch between individual/cumulative CPU stats
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82 | //config: This adds about 0.5k.
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83 | //config:
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84 | //config:config FEATURE_TOP_DECIMALS
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85 | //config: bool "Show 1/10th of a percent in CPU/mem statistics"
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86 | //config: default y
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87 | //config: depends on FEATURE_TOP_CPU_USAGE_PERCENTAGE
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88 | //config: help
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89 | //config: Show 1/10th of a percent in CPU/mem statistics.
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90 | //config: This adds about 0.3k.
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91 | //config:
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92 | //config:config FEATURE_TOP_SMP_PROCESS
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93 | //config: bool "Show CPU process runs on ('j' field)"
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94 | //config: default y
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95 | //config: depends on TOP
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96 | //config: help
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97 | //config: Show CPU where process was last found running on.
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98 | //config: This is the 'j' field.
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99 | //config:
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100 | //config:config FEATURE_TOPMEM
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101 | //config: bool "Topmem command ('s' key)"
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102 | //config: default y
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103 | //config: depends on TOP
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104 | //config: help
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105 | //config: Enable 's' in top (gives lots of memory info).
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106 |
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107 | #include "libbb.h"
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108 | #include "common_bufsiz.h"
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109 |
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110 |
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111 | typedef struct top_status_t {
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112 | unsigned long vsz;
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113 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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114 | unsigned long ticks;
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115 | unsigned pcpu; /* delta of ticks */
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116 | #endif
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117 | unsigned pid, ppid;
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118 | unsigned uid;
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119 | char state[4];
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120 | char comm[COMM_LEN];
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121 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
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122 | int last_seen_on_cpu;
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123 | #endif
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124 | } top_status_t;
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125 |
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126 | typedef struct jiffy_counts_t {
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127 | /* Linux 2.4.x has only first four */
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128 | unsigned long long usr, nic, sys, idle;
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129 | unsigned long long iowait, irq, softirq, steal;
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130 | unsigned long long total;
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131 | unsigned long long busy;
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132 | } jiffy_counts_t;
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133 |
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134 | /* This structure stores some critical information from one frame to
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135 | the next. Used for finding deltas. */
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136 | typedef struct save_hist {
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137 | unsigned long ticks;
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138 | pid_t pid;
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139 | } save_hist;
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140 |
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141 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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142 |
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143 |
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144 | enum { SORT_DEPTH = 3 };
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145 |
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146 |
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147 | struct globals {
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148 | top_status_t *top;
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149 | int ntop;
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150 | smallint inverted;
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151 | #if ENABLE_FEATURE_TOPMEM
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152 | smallint sort_field;
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153 | #endif
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154 | #if ENABLE_FEATURE_TOP_SMP_CPU
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155 | smallint smp_cpu_info; /* one/many cpu info lines? */
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156 | #endif
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157 | unsigned lines; /* screen height */
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158 | #if ENABLE_FEATURE_USE_TERMIOS
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159 | struct termios initial_settings;
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160 | int scroll_ofs;
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161 | #define G_scroll_ofs G.scroll_ofs
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162 | #else
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163 | #define G_scroll_ofs 0
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164 | #endif
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165 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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166 | cmp_funcp sort_function[1];
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167 | #else
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168 | cmp_funcp sort_function[SORT_DEPTH];
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169 | struct save_hist *prev_hist;
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170 | int prev_hist_count;
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171 | jiffy_counts_t cur_jif, prev_jif;
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172 | /* int hist_iterations; */
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173 | unsigned total_pcpu;
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174 | /* unsigned long total_vsz; */
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175 | #endif
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176 | #if ENABLE_FEATURE_TOP_SMP_CPU
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177 | /* Per CPU samples: current and last */
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178 | jiffy_counts_t *cpu_jif, *cpu_prev_jif;
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179 | int num_cpus;
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180 | #endif
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181 | #if ENABLE_FEATURE_USE_TERMIOS
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182 | char kbd_input[KEYCODE_BUFFER_SIZE];
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183 | #endif
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184 | char line_buf[80];
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185 | }; //FIX_ALIASING; - large code growth
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186 | enum { LINE_BUF_SIZE = COMMON_BUFSIZE - offsetof(struct globals, line_buf) };
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187 | #define G (*(struct globals*)bb_common_bufsiz1)
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188 | #define top (G.top )
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189 | #define ntop (G.ntop )
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190 | #define sort_field (G.sort_field )
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191 | #define inverted (G.inverted )
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192 | #define smp_cpu_info (G.smp_cpu_info )
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193 | #define initial_settings (G.initial_settings )
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194 | #define sort_function (G.sort_function )
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195 | #define prev_hist (G.prev_hist )
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196 | #define prev_hist_count (G.prev_hist_count )
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197 | #define cur_jif (G.cur_jif )
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198 | #define prev_jif (G.prev_jif )
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199 | #define cpu_jif (G.cpu_jif )
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200 | #define cpu_prev_jif (G.cpu_prev_jif )
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201 | #define num_cpus (G.num_cpus )
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202 | #define total_pcpu (G.total_pcpu )
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203 | #define line_buf (G.line_buf )
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204 | #define INIT_G() do { \
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205 | setup_common_bufsiz(); \
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206 | BUILD_BUG_ON(sizeof(G) > COMMON_BUFSIZE); \
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207 | BUILD_BUG_ON(LINE_BUF_SIZE <= 80); \
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208 | } while (0)
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209 |
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210 | enum {
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211 | OPT_d = (1 << 0),
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212 | OPT_n = (1 << 1),
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213 | OPT_b = (1 << 2),
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214 | OPT_m = (1 << 3),
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215 | OPT_EOF = (1 << 4), /* pseudo: "we saw EOF in stdin" */
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216 | };
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217 | #define OPT_BATCH_MODE (option_mask32 & OPT_b)
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218 |
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219 |
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220 | #if ENABLE_FEATURE_USE_TERMIOS
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221 | static int pid_sort(top_status_t *P, top_status_t *Q)
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222 | {
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223 | /* Buggy wrt pids with high bit set */
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224 | /* (linux pids are in [1..2^15-1]) */
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225 | return (Q->pid - P->pid);
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226 | }
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227 | #endif
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228 |
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229 | static int mem_sort(top_status_t *P, top_status_t *Q)
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230 | {
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231 | /* We want to avoid unsigned->signed and truncation errors */
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232 | if (Q->vsz < P->vsz) return -1;
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233 | return Q->vsz != P->vsz; /* 0 if ==, 1 if > */
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234 | }
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235 |
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236 |
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237 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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238 |
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239 | static int pcpu_sort(top_status_t *P, top_status_t *Q)
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240 | {
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241 | /* Buggy wrt ticks with high bit set */
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242 | /* Affects only processes for which ticks overflow */
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243 | return (int)Q->pcpu - (int)P->pcpu;
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244 | }
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245 |
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246 | static int time_sort(top_status_t *P, top_status_t *Q)
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247 | {
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248 | /* We want to avoid unsigned->signed and truncation errors */
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249 | if (Q->ticks < P->ticks) return -1;
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250 | return Q->ticks != P->ticks; /* 0 if ==, 1 if > */
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251 | }
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252 |
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253 | static int mult_lvl_cmp(void* a, void* b)
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254 | {
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255 | int i, cmp_val;
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256 |
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257 | for (i = 0; i < SORT_DEPTH; i++) {
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258 | cmp_val = (*sort_function[i])(a, b);
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259 | if (cmp_val != 0)
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260 | break;
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261 | }
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262 | return inverted ? -cmp_val : cmp_val;
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263 | }
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264 |
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265 | static NOINLINE int read_cpu_jiffy(FILE *fp, jiffy_counts_t *p_jif)
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266 | {
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267 | #if !ENABLE_FEATURE_TOP_SMP_CPU
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268 | static const char fmt[] ALIGN1 = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
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269 | #else
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270 | static const char fmt[] ALIGN1 = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
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271 | #endif
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272 | int ret;
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273 |
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274 | if (!fgets(line_buf, LINE_BUF_SIZE, fp) || line_buf[0] != 'c' /* not "cpu" */)
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275 | return 0;
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276 | ret = sscanf(line_buf, fmt,
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277 | &p_jif->usr, &p_jif->nic, &p_jif->sys, &p_jif->idle,
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278 | &p_jif->iowait, &p_jif->irq, &p_jif->softirq,
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279 | &p_jif->steal);
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280 | if (ret >= 4) {
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281 | p_jif->total = p_jif->usr + p_jif->nic + p_jif->sys + p_jif->idle
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282 | + p_jif->iowait + p_jif->irq + p_jif->softirq + p_jif->steal;
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283 | /* procps 2.x does not count iowait as busy time */
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284 | p_jif->busy = p_jif->total - p_jif->idle - p_jif->iowait;
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285 | }
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286 |
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287 | return ret;
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288 | }
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289 |
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290 | static void get_jiffy_counts(void)
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291 | {
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292 | FILE* fp = xfopen_for_read("stat");
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293 |
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294 | /* We need to parse cumulative counts even if SMP CPU display is on,
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295 | * they are used to calculate per process CPU% */
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296 | prev_jif = cur_jif;
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297 | if (read_cpu_jiffy(fp, &cur_jif) < 4)
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298 | bb_error_msg_and_die("can't read '%s'", "/proc/stat");
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299 |
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300 | #if !ENABLE_FEATURE_TOP_SMP_CPU
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301 | fclose(fp);
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302 | return;
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303 | #else
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304 | if (!smp_cpu_info) {
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305 | fclose(fp);
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306 | return;
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307 | }
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308 |
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309 | if (!num_cpus) {
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310 | /* First time here. How many CPUs?
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311 | * There will be at least 1 /proc/stat line with cpu%d
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312 | */
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313 | while (1) {
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314 | cpu_jif = xrealloc_vector(cpu_jif, 1, num_cpus);
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315 | if (read_cpu_jiffy(fp, &cpu_jif[num_cpus]) <= 4)
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316 | break;
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317 | num_cpus++;
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318 | }
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319 | if (num_cpus == 0) /* /proc/stat with only "cpu ..." line?! */
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320 | smp_cpu_info = 0;
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321 |
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322 | cpu_prev_jif = xzalloc(sizeof(cpu_prev_jif[0]) * num_cpus);
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323 |
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324 | /* Otherwise the first per cpu display shows all 100% idles */
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325 | usleep(50000);
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326 | } else { /* Non first time invocation */
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327 | jiffy_counts_t *tmp;
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328 | int i;
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329 |
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330 | /* First switch the sample pointers: no need to copy */
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331 | tmp = cpu_prev_jif;
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332 | cpu_prev_jif = cpu_jif;
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333 | cpu_jif = tmp;
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334 |
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335 | /* Get the new samples */
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336 | for (i = 0; i < num_cpus; i++)
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337 | read_cpu_jiffy(fp, &cpu_jif[i]);
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338 | }
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339 | #endif
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340 | fclose(fp);
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341 | }
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342 |
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343 | static void do_stats(void)
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344 | {
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345 | top_status_t *cur;
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346 | pid_t pid;
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347 | int i, last_i, n;
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348 | struct save_hist *new_hist;
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349 |
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350 | get_jiffy_counts();
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351 | total_pcpu = 0;
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352 | /* total_vsz = 0; */
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353 | new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
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354 | /*
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355 | * Make a pass through the data to get stats.
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356 | */
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357 | /* hist_iterations = 0; */
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358 | i = 0;
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359 | for (n = 0; n < ntop; n++) {
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360 | cur = top + n;
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361 |
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362 | /*
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363 | * Calculate time in cur process. Time is sum of user time
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364 | * and system time
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365 | */
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366 | pid = cur->pid;
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367 | new_hist[n].ticks = cur->ticks;
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368 | new_hist[n].pid = pid;
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369 |
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370 | /* find matching entry from previous pass */
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371 | cur->pcpu = 0;
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372 | /* do not start at index 0, continue at last used one
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373 | * (brought hist_iterations from ~14000 down to 172) */
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374 | last_i = i;
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375 | if (prev_hist_count) do {
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376 | if (prev_hist[i].pid == pid) {
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377 | cur->pcpu = cur->ticks - prev_hist[i].ticks;
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378 | total_pcpu += cur->pcpu;
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379 | break;
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380 | }
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381 | i = (i+1) % prev_hist_count;
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382 | /* hist_iterations++; */
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383 | } while (i != last_i);
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384 | /* total_vsz += cur->vsz; */
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385 | }
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386 |
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387 | /*
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388 | * Save cur frame's information.
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389 | */
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390 | free(prev_hist);
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391 | prev_hist = new_hist;
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392 | prev_hist_count = ntop;
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393 | }
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394 |
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395 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
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396 |
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397 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
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398 | /* formats 7 char string (8 with terminating NUL) */
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399 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
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400 | {
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401 | unsigned t;
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402 | if (value >= total) { /* 100% ? */
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403 | strcpy(pbuf, " 100% ");
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404 | return pbuf;
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405 | }
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406 | /* else generate " [N/space]N.N% " string */
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407 | value = 1000 * value / total;
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408 | t = value / 100;
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409 | value = value % 100;
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410 | pbuf[0] = ' ';
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411 | pbuf[1] = t ? t + '0' : ' ';
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412 | pbuf[2] = '0' + (value / 10);
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413 | pbuf[3] = '.';
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414 | pbuf[4] = '0' + (value % 10);
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415 | pbuf[5] = '%';
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416 | pbuf[6] = ' ';
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417 | pbuf[7] = '\0';
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418 | return pbuf;
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419 | }
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420 | #endif
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421 |
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422 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
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423 | static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
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424 | {
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425 | /*
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426 | * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
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427 | */
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428 | unsigned total_diff;
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429 | jiffy_counts_t *p_jif, *p_prev_jif;
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430 | int i;
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431 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
432 | int n_cpu_lines;
|
---|
433 | # endif
|
---|
434 |
|
---|
435 | /* using (unsigned) casts to make operations cheaper */
|
---|
436 | # define CALC_TOTAL_DIFF do { \
|
---|
437 | total_diff = (unsigned)(p_jif->total - p_prev_jif->total); \
|
---|
438 | if (total_diff == 0) total_diff = 1; \
|
---|
439 | } while (0)
|
---|
440 |
|
---|
441 | # if ENABLE_FEATURE_TOP_DECIMALS
|
---|
442 | # define CALC_STAT(xxx) char xxx[8]
|
---|
443 | # define SHOW_STAT(xxx) fmt_100percent_8(xxx, (unsigned)(p_jif->xxx - p_prev_jif->xxx), total_diff)
|
---|
444 | # define FMT "%s"
|
---|
445 | # else
|
---|
446 | # define CALC_STAT(xxx) unsigned xxx = 100 * (unsigned)(p_jif->xxx - p_prev_jif->xxx) / total_diff
|
---|
447 | # define SHOW_STAT(xxx) xxx
|
---|
448 | # define FMT "%4u%% "
|
---|
449 | # endif
|
---|
450 |
|
---|
451 | # if !ENABLE_FEATURE_TOP_SMP_CPU
|
---|
452 | {
|
---|
453 | i = 1;
|
---|
454 | p_jif = &cur_jif;
|
---|
455 | p_prev_jif = &prev_jif;
|
---|
456 | # else
|
---|
457 | /* Loop thru CPU(s) */
|
---|
458 | n_cpu_lines = smp_cpu_info ? num_cpus : 1;
|
---|
459 | if (n_cpu_lines > *lines_rem_p)
|
---|
460 | n_cpu_lines = *lines_rem_p;
|
---|
461 |
|
---|
462 | for (i = 0; i < n_cpu_lines; i++) {
|
---|
463 | p_jif = &cpu_jif[i];
|
---|
464 | p_prev_jif = &cpu_prev_jif[i];
|
---|
465 | # endif
|
---|
466 | CALC_TOTAL_DIFF;
|
---|
467 |
|
---|
468 | { /* Need a block: CALC_STAT are declarations */
|
---|
469 | CALC_STAT(usr);
|
---|
470 | CALC_STAT(sys);
|
---|
471 | CALC_STAT(nic);
|
---|
472 | CALC_STAT(idle);
|
---|
473 | CALC_STAT(iowait);
|
---|
474 | CALC_STAT(irq);
|
---|
475 | CALC_STAT(softirq);
|
---|
476 | /*CALC_STAT(steal);*/
|
---|
477 |
|
---|
478 | snprintf(scrbuf, scr_width,
|
---|
479 | /* Barely fits in 79 chars when in "decimals" mode. */
|
---|
480 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
481 | "CPU%s:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
---|
482 | (smp_cpu_info ? utoa(i) : ""),
|
---|
483 | # else
|
---|
484 | "CPU:"FMT"usr"FMT"sys"FMT"nic"FMT"idle"FMT"io"FMT"irq"FMT"sirq",
|
---|
485 | # endif
|
---|
486 | SHOW_STAT(usr), SHOW_STAT(sys), SHOW_STAT(nic), SHOW_STAT(idle),
|
---|
487 | SHOW_STAT(iowait), SHOW_STAT(irq), SHOW_STAT(softirq)
|
---|
488 | /*, SHOW_STAT(steal) - what is this 'steal' thing? */
|
---|
489 | /* I doubt anyone wants to know it */
|
---|
490 | );
|
---|
491 | puts(scrbuf);
|
---|
492 | }
|
---|
493 | }
|
---|
494 | # undef SHOW_STAT
|
---|
495 | # undef CALC_STAT
|
---|
496 | # undef FMT
|
---|
497 | *lines_rem_p -= i;
|
---|
498 | }
|
---|
499 | #else /* !ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS */
|
---|
500 | # define display_cpus(scr_width, scrbuf, lines_rem) ((void)0)
|
---|
501 | #endif
|
---|
502 |
|
---|
503 | enum {
|
---|
504 | MI_MEMTOTAL,
|
---|
505 | MI_MEMFREE,
|
---|
506 | MI_MEMSHARED,
|
---|
507 | MI_SHMEM,
|
---|
508 | MI_BUFFERS,
|
---|
509 | MI_CACHED,
|
---|
510 | MI_SWAPTOTAL,
|
---|
511 | MI_SWAPFREE,
|
---|
512 | MI_DIRTY,
|
---|
513 | MI_WRITEBACK,
|
---|
514 | MI_ANONPAGES,
|
---|
515 | MI_MAPPED,
|
---|
516 | MI_SLAB,
|
---|
517 | MI_MAX
|
---|
518 | };
|
---|
519 |
|
---|
520 | static void parse_meminfo(unsigned long meminfo[MI_MAX])
|
---|
521 | {
|
---|
522 | static const char fields[] ALIGN1 =
|
---|
523 | "MemTotal\0"
|
---|
524 | "MemFree\0"
|
---|
525 | "MemShared\0"
|
---|
526 | "Shmem\0"
|
---|
527 | "Buffers\0"
|
---|
528 | "Cached\0"
|
---|
529 | "SwapTotal\0"
|
---|
530 | "SwapFree\0"
|
---|
531 | "Dirty\0"
|
---|
532 | "Writeback\0"
|
---|
533 | "AnonPages\0"
|
---|
534 | "Mapped\0"
|
---|
535 | "Slab\0";
|
---|
536 | char buf[60]; /* actual lines we expect are ~30 chars or less */
|
---|
537 | FILE *f;
|
---|
538 | int i;
|
---|
539 |
|
---|
540 | memset(meminfo, 0, sizeof(meminfo[0]) * MI_MAX);
|
---|
541 | f = xfopen_for_read("meminfo");
|
---|
542 | while (fgets(buf, sizeof(buf), f) != NULL) {
|
---|
543 | char *c = strchr(buf, ':');
|
---|
544 | if (!c)
|
---|
545 | continue;
|
---|
546 | *c = '\0';
|
---|
547 | i = index_in_strings(fields, buf);
|
---|
548 | if (i >= 0)
|
---|
549 | meminfo[i] = strtoul(c+1, NULL, 10);
|
---|
550 | }
|
---|
551 | fclose(f);
|
---|
552 | }
|
---|
553 |
|
---|
554 | static unsigned long display_header(int scr_width, int *lines_rem_p)
|
---|
555 | {
|
---|
556 | char scrbuf[100]; /* [80] was a bit too low on 8Gb ram box */
|
---|
557 | char *buf;
|
---|
558 | unsigned long meminfo[MI_MAX];
|
---|
559 |
|
---|
560 | parse_meminfo(meminfo);
|
---|
561 |
|
---|
562 | /* Output memory info */
|
---|
563 | if (scr_width > (int)sizeof(scrbuf))
|
---|
564 | scr_width = sizeof(scrbuf);
|
---|
565 | snprintf(scrbuf, scr_width,
|
---|
566 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
---|
567 | meminfo[MI_MEMTOTAL] - meminfo[MI_MEMFREE],
|
---|
568 | meminfo[MI_MEMFREE],
|
---|
569 | meminfo[MI_MEMSHARED] + meminfo[MI_SHMEM],
|
---|
570 | meminfo[MI_BUFFERS],
|
---|
571 | meminfo[MI_CACHED]);
|
---|
572 | /* Go to top & clear to the end of screen */
|
---|
573 | printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
|
---|
574 | (*lines_rem_p)--;
|
---|
575 |
|
---|
576 | /* Display CPU time split as percentage of total time.
|
---|
577 | * This displays either a cumulative line or one line per CPU.
|
---|
578 | */
|
---|
579 | display_cpus(scr_width, scrbuf, lines_rem_p);
|
---|
580 |
|
---|
581 | /* Read load average as a string */
|
---|
582 | buf = stpcpy(scrbuf, "Load average: ");
|
---|
583 | open_read_close("loadavg", buf, sizeof(scrbuf) - sizeof("Load average: "));
|
---|
584 | scrbuf[scr_width - 1] = '\0';
|
---|
585 | strchrnul(buf, '\n')[0] = '\0';
|
---|
586 | puts(scrbuf);
|
---|
587 | (*lines_rem_p)--;
|
---|
588 |
|
---|
589 | return meminfo[MI_MEMTOTAL];
|
---|
590 | }
|
---|
591 |
|
---|
592 | static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
---|
593 | {
|
---|
594 | enum {
|
---|
595 | BITS_PER_INT = sizeof(int) * 8
|
---|
596 | };
|
---|
597 |
|
---|
598 | top_status_t *s;
|
---|
599 | char vsz_str_buf[8];
|
---|
600 | unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
|
---|
601 | /* xxx_shift and xxx_scale variables allow us to replace
|
---|
602 | * expensive divides with multiply and shift */
|
---|
603 | unsigned pmem_shift, pmem_scale, pmem_half;
|
---|
604 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
605 | unsigned tmp_unsigned;
|
---|
606 | unsigned pcpu_shift, pcpu_scale, pcpu_half;
|
---|
607 | unsigned busy_jifs;
|
---|
608 | #endif
|
---|
609 |
|
---|
610 | /* what info of the processes is shown */
|
---|
611 | printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
|
---|
612 | " PID PPID USER STAT VSZ %VSZ"
|
---|
613 | IF_FEATURE_TOP_SMP_PROCESS(" CPU")
|
---|
614 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
|
---|
615 | " COMMAND");
|
---|
616 | lines_rem--;
|
---|
617 |
|
---|
618 | #if ENABLE_FEATURE_TOP_DECIMALS
|
---|
619 | # define UPSCALE 1000
|
---|
620 | # define CALC_STAT(name, val) div_t name = div((val), 10)
|
---|
621 | # define SHOW_STAT(name) name.quot, '0'+name.rem
|
---|
622 | # define FMT "%3u.%c"
|
---|
623 | #else
|
---|
624 | # define UPSCALE 100
|
---|
625 | # define CALC_STAT(name, val) unsigned name = (val)
|
---|
626 | # define SHOW_STAT(name) name
|
---|
627 | # define FMT "%4u%%"
|
---|
628 | #endif
|
---|
629 | /*
|
---|
630 | * %VSZ = s->vsz/MemTotal
|
---|
631 | */
|
---|
632 | pmem_shift = BITS_PER_INT-11;
|
---|
633 | pmem_scale = UPSCALE*(1U<<(BITS_PER_INT-11)) / total_memory;
|
---|
634 | /* s->vsz is in kb. we want (s->vsz * pmem_scale) to never overflow */
|
---|
635 | while (pmem_scale >= 512) {
|
---|
636 | pmem_scale /= 4;
|
---|
637 | pmem_shift -= 2;
|
---|
638 | }
|
---|
639 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
640 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
641 | busy_jifs = cur_jif.busy - prev_jif.busy;
|
---|
642 | /* This happens if there were lots of short-lived processes
|
---|
643 | * between two top updates (e.g. compilation) */
|
---|
644 | if (total_pcpu < busy_jifs) total_pcpu = busy_jifs;
|
---|
645 |
|
---|
646 | /*
|
---|
647 | * CPU% = s->pcpu/sum(s->pcpu) * busy_cpu_ticks/total_cpu_ticks
|
---|
648 | * (pcpu is delta of sys+user time between samples)
|
---|
649 | */
|
---|
650 | /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
|
---|
651 | * in 0..~64000 range (HZ*update_interval).
|
---|
652 | * we assume that unsigned is at least 32-bit.
|
---|
653 | */
|
---|
654 | pcpu_shift = 6;
|
---|
655 | pcpu_scale = UPSCALE*64 * (uint16_t)busy_jifs;
|
---|
656 | if (pcpu_scale == 0)
|
---|
657 | pcpu_scale = 1;
|
---|
658 | while (pcpu_scale < (1U << (BITS_PER_INT-2))) {
|
---|
659 | pcpu_scale *= 4;
|
---|
660 | pcpu_shift += 2;
|
---|
661 | }
|
---|
662 | tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
|
---|
663 | if (tmp_unsigned != 0)
|
---|
664 | pcpu_scale /= tmp_unsigned;
|
---|
665 | /* we want (s->pcpu * pcpu_scale) to never overflow */
|
---|
666 | while (pcpu_scale >= 1024) {
|
---|
667 | pcpu_scale /= 4;
|
---|
668 | pcpu_shift -= 2;
|
---|
669 | }
|
---|
670 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
671 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
---|
672 | #endif
|
---|
673 |
|
---|
674 | /* Ok, all preliminary data is ready, go through the list */
|
---|
675 | scr_width += 2; /* account for leading '\n' and trailing NUL */
|
---|
676 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
677 | lines_rem = ntop - G_scroll_ofs;
|
---|
678 | s = top + G_scroll_ofs;
|
---|
679 | while (--lines_rem >= 0) {
|
---|
680 | unsigned col;
|
---|
681 | CALC_STAT(pmem, (s->vsz*pmem_scale + pmem_half) >> pmem_shift);
|
---|
682 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
683 | CALC_STAT(pcpu, (s->pcpu*pcpu_scale + pcpu_half) >> pcpu_shift);
|
---|
684 | #endif
|
---|
685 |
|
---|
686 | if (s->vsz >= 100000)
|
---|
687 | sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
|
---|
688 | else
|
---|
689 | sprintf(vsz_str_buf, "%7lu", s->vsz);
|
---|
690 | /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
|
---|
691 | col = snprintf(line_buf, scr_width,
|
---|
692 | "\n" "%5u%6u %-8.8s %s%s" FMT
|
---|
693 | IF_FEATURE_TOP_SMP_PROCESS(" %3d")
|
---|
694 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(FMT)
|
---|
695 | " ",
|
---|
696 | s->pid, s->ppid, get_cached_username(s->uid),
|
---|
697 | s->state, vsz_str_buf,
|
---|
698 | SHOW_STAT(pmem)
|
---|
699 | IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
|
---|
700 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
|
---|
701 | );
|
---|
702 | if ((int)(col + 1) < scr_width)
|
---|
703 | read_cmdline(line_buf + col, scr_width - col, s->pid, s->comm);
|
---|
704 | fputs(line_buf, stdout);
|
---|
705 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
---|
706 | cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
---|
707 | s++;
|
---|
708 | }
|
---|
709 | /* printf(" %d", hist_iterations); */
|
---|
710 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
711 | fflush_all();
|
---|
712 | }
|
---|
713 | #undef UPSCALE
|
---|
714 | #undef SHOW_STAT
|
---|
715 | #undef CALC_STAT
|
---|
716 | #undef FMT
|
---|
717 |
|
---|
718 | static void clearmems(void)
|
---|
719 | {
|
---|
720 | clear_username_cache();
|
---|
721 | free(top);
|
---|
722 | top = NULL;
|
---|
723 | }
|
---|
724 |
|
---|
725 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
726 |
|
---|
727 | static void reset_term(void)
|
---|
728 | {
|
---|
729 | if (!OPT_BATCH_MODE)
|
---|
730 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
731 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
732 | clearmems();
|
---|
733 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
734 | free(prev_hist);
|
---|
735 | # endif
|
---|
736 | }
|
---|
737 | }
|
---|
738 |
|
---|
739 | static void sig_catcher(int sig)
|
---|
740 | {
|
---|
741 | reset_term();
|
---|
742 | kill_myself_with_sig(sig);
|
---|
743 | }
|
---|
744 |
|
---|
745 | #endif /* FEATURE_USE_TERMIOS */
|
---|
746 |
|
---|
747 | /*
|
---|
748 | * TOPMEM support
|
---|
749 | */
|
---|
750 |
|
---|
751 | typedef unsigned long mem_t;
|
---|
752 |
|
---|
753 | typedef struct topmem_status_t {
|
---|
754 | unsigned pid;
|
---|
755 | char comm[COMM_LEN];
|
---|
756 | /* vsz doesn't count /dev/xxx mappings except /dev/zero */
|
---|
757 | mem_t vsz ;
|
---|
758 | mem_t vszrw ;
|
---|
759 | mem_t rss ;
|
---|
760 | mem_t rss_sh ;
|
---|
761 | mem_t dirty ;
|
---|
762 | mem_t dirty_sh;
|
---|
763 | mem_t stack ;
|
---|
764 | } topmem_status_t;
|
---|
765 |
|
---|
766 | enum { NUM_SORT_FIELD = 7 };
|
---|
767 |
|
---|
768 | #define topmem ((topmem_status_t*)top)
|
---|
769 |
|
---|
770 | #if ENABLE_FEATURE_TOPMEM
|
---|
771 |
|
---|
772 | static int topmem_sort(char *a, char *b)
|
---|
773 | {
|
---|
774 | int n;
|
---|
775 | mem_t l, r;
|
---|
776 |
|
---|
777 | n = offsetof(topmem_status_t, vsz) + (sort_field * sizeof(mem_t));
|
---|
778 | l = *(mem_t*)(a + n);
|
---|
779 | r = *(mem_t*)(b + n);
|
---|
780 | if (l == r) {
|
---|
781 | l = ((topmem_status_t*)a)->dirty;
|
---|
782 | r = ((topmem_status_t*)b)->dirty;
|
---|
783 | }
|
---|
784 | /* We want to avoid unsigned->signed and truncation errors */
|
---|
785 | /* l>r: -1, l=r: 0, l<r: 1 */
|
---|
786 | n = (l > r) ? -1 : (l != r);
|
---|
787 | return inverted ? -n : n;
|
---|
788 | }
|
---|
789 |
|
---|
790 | /* display header info (meminfo / loadavg) */
|
---|
791 | static void display_topmem_header(int scr_width, int *lines_rem_p)
|
---|
792 | {
|
---|
793 | unsigned long meminfo[MI_MAX];
|
---|
794 |
|
---|
795 | parse_meminfo(meminfo);
|
---|
796 |
|
---|
797 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
798 | "Mem total:%lu anon:%lu map:%lu free:%lu",
|
---|
799 | meminfo[MI_MEMTOTAL],
|
---|
800 | meminfo[MI_ANONPAGES],
|
---|
801 | meminfo[MI_MAPPED],
|
---|
802 | meminfo[MI_MEMFREE]);
|
---|
803 | printf(OPT_BATCH_MODE ? "%.*s\n" : "\033[H\033[J%.*s\n", scr_width, line_buf);
|
---|
804 |
|
---|
805 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
806 | " slab:%lu buf:%lu cache:%lu dirty:%lu write:%lu",
|
---|
807 | meminfo[MI_SLAB],
|
---|
808 | meminfo[MI_BUFFERS],
|
---|
809 | meminfo[MI_CACHED],
|
---|
810 | meminfo[MI_DIRTY],
|
---|
811 | meminfo[MI_WRITEBACK]);
|
---|
812 | printf("%.*s\n", scr_width, line_buf);
|
---|
813 |
|
---|
814 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
815 | "Swap total:%lu free:%lu", // TODO: % used?
|
---|
816 | meminfo[MI_SWAPTOTAL],
|
---|
817 | meminfo[MI_SWAPFREE]);
|
---|
818 | printf("%.*s\n", scr_width, line_buf);
|
---|
819 |
|
---|
820 | (*lines_rem_p) -= 3;
|
---|
821 | }
|
---|
822 |
|
---|
823 | static void ulltoa6_and_space(unsigned long long ul, char buf[6])
|
---|
824 | {
|
---|
825 | /* see http://en.wikipedia.org/wiki/Tera */
|
---|
826 | smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
|
---|
827 | }
|
---|
828 |
|
---|
829 | static NOINLINE void display_topmem_process_list(int lines_rem, int scr_width)
|
---|
830 | {
|
---|
831 | #define HDR_STR " PID VSZ VSZRW RSS (SHR) DIRTY (SHR) STACK"
|
---|
832 | #define MIN_WIDTH sizeof(HDR_STR)
|
---|
833 | const topmem_status_t *s = topmem + G_scroll_ofs;
|
---|
834 | char *cp, ch;
|
---|
835 |
|
---|
836 | display_topmem_header(scr_width, &lines_rem);
|
---|
837 |
|
---|
838 | strcpy(line_buf, HDR_STR " COMMAND");
|
---|
839 | /* Mark the ^FIELD^ we sort by */
|
---|
840 | cp = &line_buf[5 + sort_field * 6];
|
---|
841 | ch = "^_"[inverted];
|
---|
842 | cp[6] = ch;
|
---|
843 | do *cp++ = ch; while (*cp == ' ');
|
---|
844 |
|
---|
845 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
---|
846 | lines_rem--;
|
---|
847 |
|
---|
848 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
849 | lines_rem = ntop - G_scroll_ofs;
|
---|
850 | while (--lines_rem >= 0) {
|
---|
851 | /* PID VSZ VSZRW RSS (SHR) DIRTY (SHR) COMMAND */
|
---|
852 | ulltoa6_and_space(s->pid , &line_buf[0*6]);
|
---|
853 | ulltoa6_and_space(s->vsz , &line_buf[1*6]);
|
---|
854 | ulltoa6_and_space(s->vszrw , &line_buf[2*6]);
|
---|
855 | ulltoa6_and_space(s->rss , &line_buf[3*6]);
|
---|
856 | ulltoa6_and_space(s->rss_sh , &line_buf[4*6]);
|
---|
857 | ulltoa6_and_space(s->dirty , &line_buf[5*6]);
|
---|
858 | ulltoa6_and_space(s->dirty_sh, &line_buf[6*6]);
|
---|
859 | ulltoa6_and_space(s->stack , &line_buf[7*6]);
|
---|
860 | line_buf[8*6] = '\0';
|
---|
861 | if (scr_width > (int)MIN_WIDTH) {
|
---|
862 | read_cmdline(&line_buf[8*6], scr_width - MIN_WIDTH, s->pid, s->comm);
|
---|
863 | }
|
---|
864 | printf("\n""%.*s", scr_width, line_buf);
|
---|
865 | s++;
|
---|
866 | }
|
---|
867 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
868 | fflush_all();
|
---|
869 | #undef HDR_STR
|
---|
870 | #undef MIN_WIDTH
|
---|
871 | }
|
---|
872 |
|
---|
873 | #else
|
---|
874 | void display_topmem_process_list(int lines_rem, int scr_width);
|
---|
875 | int topmem_sort(char *a, char *b);
|
---|
876 | #endif /* TOPMEM */
|
---|
877 |
|
---|
878 | /*
|
---|
879 | * end TOPMEM support
|
---|
880 | */
|
---|
881 |
|
---|
882 | enum {
|
---|
883 | TOP_MASK = 0
|
---|
884 | | PSSCAN_PID
|
---|
885 | | PSSCAN_PPID
|
---|
886 | | PSSCAN_VSZ
|
---|
887 | | PSSCAN_STIME
|
---|
888 | | PSSCAN_UTIME
|
---|
889 | | PSSCAN_STATE
|
---|
890 | | PSSCAN_COMM
|
---|
891 | | PSSCAN_CPU
|
---|
892 | | PSSCAN_UIDGID,
|
---|
893 | TOPMEM_MASK = 0
|
---|
894 | | PSSCAN_PID
|
---|
895 | | PSSCAN_SMAPS
|
---|
896 | | PSSCAN_COMM,
|
---|
897 | EXIT_MASK = (unsigned)-1,
|
---|
898 | };
|
---|
899 |
|
---|
900 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
901 | static unsigned handle_input(unsigned scan_mask, unsigned interval)
|
---|
902 | {
|
---|
903 | if (option_mask32 & OPT_EOF) {
|
---|
904 | /* EOF on stdin ("top </dev/null") */
|
---|
905 | sleep(interval);
|
---|
906 | return scan_mask;
|
---|
907 | }
|
---|
908 |
|
---|
909 | while (1) {
|
---|
910 | int32_t c;
|
---|
911 |
|
---|
912 | c = read_key(STDIN_FILENO, G.kbd_input, interval * 1000);
|
---|
913 | if (c == -1 && errno != EAGAIN) {
|
---|
914 | /* error/EOF */
|
---|
915 | option_mask32 |= OPT_EOF;
|
---|
916 | break;
|
---|
917 | }
|
---|
918 | interval = 0;
|
---|
919 |
|
---|
920 | if (c == initial_settings.c_cc[VINTR])
|
---|
921 | return EXIT_MASK;
|
---|
922 | if (c == initial_settings.c_cc[VEOF])
|
---|
923 | return EXIT_MASK;
|
---|
924 |
|
---|
925 | if (c == KEYCODE_UP) {
|
---|
926 | G_scroll_ofs--;
|
---|
927 | goto normalize_ofs;
|
---|
928 | }
|
---|
929 | if (c == KEYCODE_DOWN) {
|
---|
930 | G_scroll_ofs++;
|
---|
931 | goto normalize_ofs;
|
---|
932 | }
|
---|
933 | if (c == KEYCODE_HOME) {
|
---|
934 | G_scroll_ofs = 0;
|
---|
935 | break;
|
---|
936 | }
|
---|
937 | if (c == KEYCODE_END) {
|
---|
938 | G_scroll_ofs = ntop - G.lines / 2;
|
---|
939 | goto normalize_ofs;
|
---|
940 | }
|
---|
941 | if (c == KEYCODE_PAGEUP) {
|
---|
942 | G_scroll_ofs -= G.lines / 2;
|
---|
943 | goto normalize_ofs;
|
---|
944 | }
|
---|
945 | if (c == KEYCODE_PAGEDOWN) {
|
---|
946 | G_scroll_ofs += G.lines / 2;
|
---|
947 | normalize_ofs:
|
---|
948 | if (G_scroll_ofs >= ntop)
|
---|
949 | G_scroll_ofs = ntop - 1;
|
---|
950 | if (G_scroll_ofs < 0)
|
---|
951 | G_scroll_ofs = 0;
|
---|
952 | break;
|
---|
953 | }
|
---|
954 |
|
---|
955 | c |= 0x20; /* lowercase */
|
---|
956 | if (c == 'q')
|
---|
957 | return EXIT_MASK;
|
---|
958 |
|
---|
959 | if (c == 'n') {
|
---|
960 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
961 | sort_function[0] = pid_sort;
|
---|
962 | continue;
|
---|
963 | }
|
---|
964 | if (c == 'm') {
|
---|
965 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
966 | sort_function[0] = mem_sort;
|
---|
967 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
968 | sort_function[1] = pcpu_sort;
|
---|
969 | sort_function[2] = time_sort;
|
---|
970 | # endif
|
---|
971 | continue;
|
---|
972 | }
|
---|
973 | # if ENABLE_FEATURE_SHOW_THREADS
|
---|
974 | if (c == 'h'
|
---|
975 | IF_FEATURE_TOPMEM(&& scan_mask != TOPMEM_MASK)
|
---|
976 | ) {
|
---|
977 | scan_mask ^= PSSCAN_TASKS;
|
---|
978 | continue;
|
---|
979 | }
|
---|
980 | # endif
|
---|
981 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
982 | if (c == 'p') {
|
---|
983 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
984 | sort_function[0] = pcpu_sort;
|
---|
985 | sort_function[1] = mem_sort;
|
---|
986 | sort_function[2] = time_sort;
|
---|
987 | continue;
|
---|
988 | }
|
---|
989 | if (c == 't') {
|
---|
990 | IF_FEATURE_TOPMEM(scan_mask = TOP_MASK;)
|
---|
991 | sort_function[0] = time_sort;
|
---|
992 | sort_function[1] = mem_sort;
|
---|
993 | sort_function[2] = pcpu_sort;
|
---|
994 | continue;
|
---|
995 | }
|
---|
996 | # if ENABLE_FEATURE_TOPMEM
|
---|
997 | if (c == 's') {
|
---|
998 | scan_mask = TOPMEM_MASK;
|
---|
999 | free(prev_hist);
|
---|
1000 | prev_hist = NULL;
|
---|
1001 | prev_hist_count = 0;
|
---|
1002 | sort_field = (sort_field + 1) % NUM_SORT_FIELD;
|
---|
1003 | continue;
|
---|
1004 | }
|
---|
1005 | # endif
|
---|
1006 | if (c == 'r') {
|
---|
1007 | inverted ^= 1;
|
---|
1008 | continue;
|
---|
1009 | }
|
---|
1010 | # if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1011 | /* procps-2.0.18 uses 'C', 3.2.7 uses '1' */
|
---|
1012 | if (c == 'c' || c == '1') {
|
---|
1013 | /* User wants to toggle per cpu <> aggregate */
|
---|
1014 | if (smp_cpu_info) {
|
---|
1015 | free(cpu_prev_jif);
|
---|
1016 | free(cpu_jif);
|
---|
1017 | cpu_jif = &cur_jif;
|
---|
1018 | cpu_prev_jif = &prev_jif;
|
---|
1019 | } else {
|
---|
1020 | /* Prepare for xrealloc() */
|
---|
1021 | cpu_jif = cpu_prev_jif = NULL;
|
---|
1022 | }
|
---|
1023 | num_cpus = 0;
|
---|
1024 | smp_cpu_info = !smp_cpu_info;
|
---|
1025 | get_jiffy_counts();
|
---|
1026 | continue;
|
---|
1027 | }
|
---|
1028 | # endif
|
---|
1029 | # endif
|
---|
1030 | break; /* unknown key -> force refresh */
|
---|
1031 | }
|
---|
1032 |
|
---|
1033 | return scan_mask;
|
---|
1034 | }
|
---|
1035 | #endif
|
---|
1036 |
|
---|
1037 | //usage:#if ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1038 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...) __VA_ARGS__
|
---|
1039 | //usage:#else
|
---|
1040 | //usage:# define IF_SHOW_THREADS_OR_TOP_SMP(...)
|
---|
1041 | //usage:#endif
|
---|
1042 | //usage:#define top_trivial_usage
|
---|
1043 | //usage: "[-b] [-nCOUNT] [-dSECONDS]" IF_FEATURE_TOPMEM(" [-m]")
|
---|
1044 | //usage:#define top_full_usage "\n\n"
|
---|
1045 | //usage: "Provide a view of process activity in real time."
|
---|
1046 | //usage: "\n""Read the status of all processes from /proc each SECONDS"
|
---|
1047 | //usage: "\n""and display a screenful of them."
|
---|
1048 | //usage: "\n""Keys:"
|
---|
1049 | //usage: "\n"" N/M"
|
---|
1050 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/P")
|
---|
1051 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/T")
|
---|
1052 | //usage: ": " IF_FEATURE_TOPMEM("show CPU usage, ") "sort by pid/mem"
|
---|
1053 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/cpu")
|
---|
1054 | //usage: IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE("/time")
|
---|
1055 | //usage: IF_FEATURE_TOPMEM(
|
---|
1056 | //usage: "\n"" S: show memory"
|
---|
1057 | //usage: )
|
---|
1058 | //usage: "\n"" R: reverse sort"
|
---|
1059 | //usage: IF_SHOW_THREADS_OR_TOP_SMP(
|
---|
1060 | //usage: "\n"" "
|
---|
1061 | //usage: IF_FEATURE_SHOW_THREADS("H: toggle threads")
|
---|
1062 | //usage: IF_FEATURE_SHOW_THREADS(IF_FEATURE_TOP_SMP_CPU(", "))
|
---|
1063 | //usage: IF_FEATURE_TOP_SMP_CPU("1: toggle SMP")
|
---|
1064 | //usage: )
|
---|
1065 | //usage: "\n"" Q,^C: exit"
|
---|
1066 | //usage: "\n"
|
---|
1067 | //usage: "\n""Options:"
|
---|
1068 | //usage: "\n"" -b Batch mode"
|
---|
1069 | //usage: "\n"" -n N Exit after N iterations"
|
---|
1070 | //usage: "\n"" -d N Delay between updates"
|
---|
1071 | //usage: IF_FEATURE_TOPMEM(
|
---|
1072 | //usage: "\n"" -m Same as 's' key"
|
---|
1073 | //usage: )
|
---|
1074 |
|
---|
1075 | /* Interactive testing:
|
---|
1076 | * echo sss | ./busybox top
|
---|
1077 | * - shows memory screen
|
---|
1078 | * echo sss | ./busybox top -bn1 >mem
|
---|
1079 | * - saves memory screen - the *whole* list, not first NROWS processes!
|
---|
1080 | * echo .m.s.s.s.s.s.s.q | ./busybox top -b >z
|
---|
1081 | * - saves several different screens, and exits
|
---|
1082 | *
|
---|
1083 | * TODO: -i STRING param as a better alternative?
|
---|
1084 | */
|
---|
1085 |
|
---|
1086 | int top_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
1087 | int top_main(int argc UNUSED_PARAM, char **argv)
|
---|
1088 | {
|
---|
1089 | int iterations;
|
---|
1090 | unsigned col;
|
---|
1091 | unsigned interval;
|
---|
1092 | char *str_interval, *str_iterations;
|
---|
1093 | unsigned scan_mask = TOP_MASK;
|
---|
1094 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1095 | struct termios new_settings;
|
---|
1096 | #endif
|
---|
1097 |
|
---|
1098 | INIT_G();
|
---|
1099 |
|
---|
1100 | interval = 5; /* default update interval is 5 seconds */
|
---|
1101 | iterations = 0; /* infinite */
|
---|
1102 | #if ENABLE_FEATURE_TOP_SMP_CPU
|
---|
1103 | /*num_cpus = 0;*/
|
---|
1104 | /*smp_cpu_info = 0;*/ /* to start with show aggregate */
|
---|
1105 | cpu_jif = &cur_jif;
|
---|
1106 | cpu_prev_jif = &prev_jif;
|
---|
1107 | #endif
|
---|
1108 |
|
---|
1109 | /* all args are options; -n NUM */
|
---|
1110 | opt_complementary = "-"; /* options can be specified w/o dash */
|
---|
1111 | col = getopt32(argv, "d:n:b"IF_FEATURE_TOPMEM("m"), &str_interval, &str_iterations);
|
---|
1112 | #if ENABLE_FEATURE_TOPMEM
|
---|
1113 | if (col & OPT_m) /* -m (busybox specific) */
|
---|
1114 | scan_mask = TOPMEM_MASK;
|
---|
1115 | #endif
|
---|
1116 | if (col & OPT_d) {
|
---|
1117 | /* work around for "-d 1" -> "-d -1" done by getopt32
|
---|
1118 | * (opt_complementary == "-" does this) */
|
---|
1119 | if (str_interval[0] == '-')
|
---|
1120 | str_interval++;
|
---|
1121 | /* Need to limit it to not overflow poll timeout */
|
---|
1122 | interval = xatou16(str_interval);
|
---|
1123 | }
|
---|
1124 | if (col & OPT_n) {
|
---|
1125 | if (str_iterations[0] == '-')
|
---|
1126 | str_iterations++;
|
---|
1127 | iterations = xatou(str_iterations);
|
---|
1128 | }
|
---|
1129 |
|
---|
1130 | /* change to /proc */
|
---|
1131 | xchdir("/proc");
|
---|
1132 |
|
---|
1133 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1134 | sort_function[0] = pcpu_sort;
|
---|
1135 | sort_function[1] = mem_sort;
|
---|
1136 | sort_function[2] = time_sort;
|
---|
1137 | #else
|
---|
1138 | sort_function[0] = mem_sort;
|
---|
1139 | #endif
|
---|
1140 |
|
---|
1141 | if (OPT_BATCH_MODE) {
|
---|
1142 | option_mask32 |= OPT_EOF;
|
---|
1143 | }
|
---|
1144 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1145 | else {
|
---|
1146 | tcgetattr(0, (void *) &initial_settings);
|
---|
1147 | memcpy(&new_settings, &initial_settings, sizeof(new_settings));
|
---|
1148 | /* unbuffered input, turn off echo */
|
---|
1149 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
---|
1150 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
1151 | }
|
---|
1152 |
|
---|
1153 | bb_signals(BB_FATAL_SIGS, sig_catcher);
|
---|
1154 |
|
---|
1155 | /* Eat initial input, if any */
|
---|
1156 | scan_mask = handle_input(scan_mask, 0);
|
---|
1157 | #endif
|
---|
1158 |
|
---|
1159 | while (scan_mask != EXIT_MASK) {
|
---|
1160 | procps_status_t *p = NULL;
|
---|
1161 |
|
---|
1162 | if (OPT_BATCH_MODE) {
|
---|
1163 | G.lines = INT_MAX;
|
---|
1164 | col = LINE_BUF_SIZE - 2; /* +2 bytes for '\n', NUL */
|
---|
1165 | } else {
|
---|
1166 | G.lines = 24; /* default */
|
---|
1167 | col = 79;
|
---|
1168 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1169 | /* We output to stdout, we need size of stdout (not stdin)! */
|
---|
1170 | get_terminal_width_height(STDOUT_FILENO, &col, &G.lines);
|
---|
1171 | if (G.lines < 5 || col < 10) {
|
---|
1172 | sleep(interval);
|
---|
1173 | continue;
|
---|
1174 | }
|
---|
1175 | #endif
|
---|
1176 | if (col > LINE_BUF_SIZE - 2)
|
---|
1177 | col = LINE_BUF_SIZE - 2;
|
---|
1178 | }
|
---|
1179 |
|
---|
1180 | /* read process IDs & status for all the processes */
|
---|
1181 | ntop = 0;
|
---|
1182 | while ((p = procps_scan(p, scan_mask)) != NULL) {
|
---|
1183 | int n;
|
---|
1184 |
|
---|
1185 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
---|
1186 | n = ntop;
|
---|
1187 | top = xrealloc_vector(top, 6, ntop++);
|
---|
1188 | top[n].pid = p->pid;
|
---|
1189 | top[n].ppid = p->ppid;
|
---|
1190 | top[n].vsz = p->vsz;
|
---|
1191 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1192 | top[n].ticks = p->stime + p->utime;
|
---|
1193 | #endif
|
---|
1194 | top[n].uid = p->uid;
|
---|
1195 | strcpy(top[n].state, p->state);
|
---|
1196 | strcpy(top[n].comm, p->comm);
|
---|
1197 | #if ENABLE_FEATURE_TOP_SMP_PROCESS
|
---|
1198 | top[n].last_seen_on_cpu = p->last_seen_on_cpu;
|
---|
1199 | #endif
|
---|
1200 | }
|
---|
1201 | #if ENABLE_FEATURE_TOPMEM
|
---|
1202 | else { /* TOPMEM */
|
---|
1203 | if (!(p->smaps.mapped_ro | p->smaps.mapped_rw))
|
---|
1204 | continue; /* kernel threads are ignored */
|
---|
1205 | n = ntop;
|
---|
1206 | /* No bug here - top and topmem are the same */
|
---|
1207 | top = xrealloc_vector(topmem, 6, ntop++);
|
---|
1208 | strcpy(topmem[n].comm, p->comm);
|
---|
1209 | topmem[n].pid = p->pid;
|
---|
1210 | topmem[n].vsz = p->smaps.mapped_rw + p->smaps.mapped_ro;
|
---|
1211 | topmem[n].vszrw = p->smaps.mapped_rw;
|
---|
1212 | topmem[n].rss_sh = p->smaps.shared_clean + p->smaps.shared_dirty;
|
---|
1213 | topmem[n].rss = p->smaps.private_clean + p->smaps.private_dirty + topmem[n].rss_sh;
|
---|
1214 | topmem[n].dirty = p->smaps.private_dirty + p->smaps.shared_dirty;
|
---|
1215 | topmem[n].dirty_sh = p->smaps.shared_dirty;
|
---|
1216 | topmem[n].stack = p->smaps.stack;
|
---|
1217 | }
|
---|
1218 | #endif
|
---|
1219 | } /* end of "while we read /proc" */
|
---|
1220 | if (ntop == 0) {
|
---|
1221 | bb_error_msg("no process info in /proc");
|
---|
1222 | break;
|
---|
1223 | }
|
---|
1224 |
|
---|
1225 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
---|
1226 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
1227 | if (!prev_hist_count) {
|
---|
1228 | do_stats();
|
---|
1229 | usleep(100000);
|
---|
1230 | clearmems();
|
---|
1231 | continue;
|
---|
1232 | }
|
---|
1233 | do_stats();
|
---|
1234 | /* TODO: we don't need to sort all 10000 processes, we need to find top 24! */
|
---|
1235 | qsort(top, ntop, sizeof(top_status_t), (void*)mult_lvl_cmp);
|
---|
1236 | #else
|
---|
1237 | qsort(top, ntop, sizeof(top_status_t), (void*)(sort_function[0]));
|
---|
1238 | #endif
|
---|
1239 | display_process_list(G.lines, col);
|
---|
1240 | }
|
---|
1241 | #if ENABLE_FEATURE_TOPMEM
|
---|
1242 | else { /* TOPMEM */
|
---|
1243 | qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
---|
1244 | display_topmem_process_list(G.lines, col);
|
---|
1245 | }
|
---|
1246 | #endif
|
---|
1247 | clearmems();
|
---|
1248 | if (iterations >= 0 && !--iterations)
|
---|
1249 | break;
|
---|
1250 | #if !ENABLE_FEATURE_USE_TERMIOS
|
---|
1251 | sleep(interval);
|
---|
1252 | #else
|
---|
1253 | scan_mask = handle_input(scan_mask, interval);
|
---|
1254 | #endif
|
---|
1255 | } /* end of "while (not Q)" */
|
---|
1256 |
|
---|
1257 | bb_putchar('\n');
|
---|
1258 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
1259 | reset_term();
|
---|
1260 | #endif
|
---|
1261 | return EXIT_SUCCESS;
|
---|
1262 | }
|
---|