[821] | 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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[2725] | 7 | *
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[821] | 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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[2725] | 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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[3232] | 22 | * - CPU where process was last seen running
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[2725] | 23 | * (to see effect of sched_setaffinity() etc)
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[3232] | 24 | * - CPU time split (idle/IO/wait etc) per CPU
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[2725] | 25 | *
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[821] | 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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[2725] | 30 | *
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| 31 | * Licensed under GPLv2, see file LICENSE in this source tree.
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[821] | 32 | */
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[3232] | 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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[821] | 52 |
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[3232] | 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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[1765] | 107 | #include "libbb.h"
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[3621] | 108 | #include "common_bufsiz.h"
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[821] | 109 |
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| 110 |
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[1765] | 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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[821] | 116 | #endif
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[1765] | 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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[2725] | 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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[1765] | 124 | } top_status_t;
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[821] | 125 |
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[1765] | 126 | typedef struct jiffy_counts_t {
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[2725] | 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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[1765] | 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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[821] | 133 |
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[1765] | 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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[2725] | 138 | pid_t pid;
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[1765] | 139 | } save_hist;
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[821] | 140 |
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[1765] | 141 | typedef int (*cmp_funcp)(top_status_t *P, top_status_t *Q);
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[821] | 142 |
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[2725] | 143 |
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[1765] | 144 | enum { SORT_DEPTH = 3 };
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| 145 |
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[2725] | 146 |
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[1765] | 147 | struct globals {
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| 148 | top_status_t *top;
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| 149 | int ntop;
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[3232] | 150 | smallint inverted;
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[2725] | 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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[3232] | 157 | unsigned lines; /* screen height */
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[1765] | 158 | #if ENABLE_FEATURE_USE_TERMIOS
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| 159 | struct termios initial_settings;
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[3232] | 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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[1765] | 164 | #endif
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| 165 | #if !ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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[2725] | 166 | cmp_funcp sort_function[1];
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[1765] | 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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[2725] | 171 | jiffy_counts_t cur_jif, prev_jif;
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[1765] | 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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[2725] | 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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[3232] | 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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[2725] | 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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[3621] | 187 | #define G (*(struct globals*)bb_common_bufsiz1)
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[1765] | 188 | #define top (G.top )
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| 189 | #define ntop (G.ntop )
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[2725] | 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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[1765] | 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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[2725] | 197 | #define cur_jif (G.cur_jif )
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[1765] | 198 | #define prev_jif (G.prev_jif )
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[2725] | 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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[1765] | 202 | #define total_pcpu (G.total_pcpu )
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[2725] | 203 | #define line_buf (G.line_buf )
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[3621] | 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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[1765] | 209 |
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[2725] | 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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[1765] | 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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[821] | 222 | {
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[1765] | 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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[821] | 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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[1765] | 229 | static int mem_sort(top_status_t *P, top_status_t *Q)
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[821] | 230 | {
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[1765] | 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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[821] | 234 | }
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| 235 |
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| 236 |
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[1765] | 237 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
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[821] | 238 |
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[1765] | 239 | static int pcpu_sort(top_status_t *P, top_status_t *Q)
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[821] | 240 | {
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[1765] | 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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[821] | 244 | }
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| 245 |
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[1765] | 246 | static int time_sort(top_status_t *P, top_status_t *Q)
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[821] | 247 | {
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[1765] | 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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[821] | 251 | }
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| 252 |
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[1765] | 253 | static int mult_lvl_cmp(void* a, void* b)
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| 254 | {
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[821] | 255 | int i, cmp_val;
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| 256 |
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[1765] | 257 | for (i = 0; i < SORT_DEPTH; i++) {
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[821] | 258 | cmp_val = (*sort_function[i])(a, b);
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| 259 | if (cmp_val != 0)
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[3232] | 260 | break;
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[821] | 261 | }
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[3232] | 262 | return inverted ? -cmp_val : cmp_val;
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[821] | 263 | }
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| 264 |
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[2725] | 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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[3621] | 268 | static const char fmt[] ALIGN1 = "cpu %llu %llu %llu %llu %llu %llu %llu %llu";
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[2725] | 269 | #else
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[3621] | 270 | static const char fmt[] ALIGN1 = "cp%*s %llu %llu %llu %llu %llu %llu %llu %llu";
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[2725] | 271 | #endif
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| 272 | int ret;
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[821] | 273 |
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[2725] | 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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[821] | 290 | static void get_jiffy_counts(void)
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| 291 | {
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[2725] | 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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[3621] | 298 | bb_error_msg_and_die("can't read '%s'", "/proc/stat");
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[2725] | 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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[821] | 307 | }
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[2725] | 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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[821] | 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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[1765] | 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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[821] | 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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[1765] | 352 | /* total_vsz = 0; */
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[2725] | 353 | new_hist = xmalloc(sizeof(new_hist[0]) * ntop);
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[821] | 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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[1765] | 367 | new_hist[n].ticks = cur->ticks;
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[821] | 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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[1765] | 377 | cur->pcpu = cur->ticks - prev_hist[i].ticks;
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| 378 | total_pcpu += cur->pcpu;
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[821] | 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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[1765] | 384 | /* total_vsz += cur->vsz; */
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[821] | 385 | }
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| 386 |
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| 387 | /*
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| 388 | * Save cur frame's information.
|
---|
| 389 | */
|
---|
| 390 | free(prev_hist);
|
---|
| 391 | prev_hist = new_hist;
|
---|
| 392 | prev_hist_count = ntop;
|
---|
| 393 | }
|
---|
[2725] | 394 |
|
---|
[1765] | 395 | #endif /* FEATURE_TOP_CPU_USAGE_PERCENTAGE */
|
---|
[821] | 396 |
|
---|
[1765] | 397 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS && ENABLE_FEATURE_TOP_DECIMALS
|
---|
| 398 | /* formats 7 char string (8 with terminating NUL) */
|
---|
| 399 | static char *fmt_100percent_8(char pbuf[8], unsigned value, unsigned total)
|
---|
| 400 | {
|
---|
| 401 | unsigned t;
|
---|
| 402 | if (value >= total) { /* 100% ? */
|
---|
| 403 | strcpy(pbuf, " 100% ");
|
---|
| 404 | return pbuf;
|
---|
| 405 | }
|
---|
| 406 | /* else generate " [N/space]N.N% " string */
|
---|
| 407 | value = 1000 * value / total;
|
---|
| 408 | t = value / 100;
|
---|
| 409 | value = value % 100;
|
---|
| 410 | pbuf[0] = ' ';
|
---|
| 411 | pbuf[1] = t ? t + '0' : ' ';
|
---|
| 412 | pbuf[2] = '0' + (value / 10);
|
---|
| 413 | pbuf[3] = '.';
|
---|
| 414 | pbuf[4] = '0' + (value % 10);
|
---|
| 415 | pbuf[5] = '%';
|
---|
| 416 | pbuf[6] = ' ';
|
---|
| 417 | pbuf[7] = '\0';
|
---|
| 418 | return pbuf;
|
---|
| 419 | }
|
---|
| 420 | #endif
|
---|
| 421 |
|
---|
[2725] | 422 | #if ENABLE_FEATURE_TOP_CPU_GLOBAL_PERCENTS
|
---|
| 423 | static void display_cpus(int scr_width, char *scrbuf, int *lines_rem_p)
|
---|
[821] | 424 | {
|
---|
[2725] | 425 | /*
|
---|
| 426 | * xxx% = (cur_jif.xxx - prev_jif.xxx) / (cur_jif.total - prev_jif.total) * 100%
|
---|
| 427 | */
|
---|
| 428 | unsigned total_diff;
|
---|
| 429 | jiffy_counts_t *p_jif, *p_prev_jif;
|
---|
| 430 | int i;
|
---|
| 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 |
|
---|
[3621] | 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])
|
---|
[2725] | 521 | {
|
---|
[3621] | 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;
|
---|
[821] | 539 |
|
---|
[3621] | 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 | }
|
---|
[821] | 553 |
|
---|
[3621] | 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];
|
---|
[821] | 559 |
|
---|
[3621] | 560 | parse_meminfo(meminfo);
|
---|
[821] | 561 |
|
---|
[3621] | 562 | /* Output memory info */
|
---|
[2725] | 563 | if (scr_width > (int)sizeof(scrbuf))
|
---|
[821] | 564 | scr_width = sizeof(scrbuf);
|
---|
| 565 | snprintf(scrbuf, scr_width,
|
---|
[1765] | 566 | "Mem: %luK used, %luK free, %luK shrd, %luK buff, %luK cached",
|
---|
[3621] | 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 */
|
---|
[2725] | 573 | printf(OPT_BATCH_MODE ? "%s\n" : "\033[H\033[J%s\n", scrbuf);
|
---|
| 574 | (*lines_rem_p)--;
|
---|
[821] | 575 |
|
---|
[3621] | 576 | /* Display CPU time split as percentage of total time.
|
---|
| 577 | * This displays either a cumulative line or one line per CPU.
|
---|
[1765] | 578 | */
|
---|
[2725] | 579 | display_cpus(scr_width, scrbuf, lines_rem_p);
|
---|
[1765] | 580 |
|
---|
[3621] | 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';
|
---|
[1765] | 586 | puts(scrbuf);
|
---|
[2725] | 587 | (*lines_rem_p)--;
|
---|
[1765] | 588 |
|
---|
[3621] | 589 | return meminfo[MI_MEMTOTAL];
|
---|
[821] | 590 | }
|
---|
| 591 |
|
---|
[2725] | 592 | static NOINLINE void display_process_list(int lines_rem, int scr_width)
|
---|
[821] | 593 | {
|
---|
| 594 | enum {
|
---|
[2725] | 595 | BITS_PER_INT = sizeof(int) * 8
|
---|
[821] | 596 | };
|
---|
| 597 |
|
---|
[2725] | 598 | top_status_t *s;
|
---|
[1765] | 599 | char vsz_str_buf[8];
|
---|
[2725] | 600 | unsigned long total_memory = display_header(scr_width, &lines_rem); /* or use total_vsz? */
|
---|
[1765] | 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
|
---|
[2725] | 605 | unsigned tmp_unsigned;
|
---|
[1765] | 606 | unsigned pcpu_shift, pcpu_scale, pcpu_half;
|
---|
| 607 | unsigned busy_jifs;
|
---|
[2725] | 608 | #endif
|
---|
[821] | 609 |
|
---|
| 610 | /* what info of the processes is shown */
|
---|
[2725] | 611 | printf(OPT_BATCH_MODE ? "%.*s" : "\033[7m%.*s\033[0m", scr_width,
|
---|
[3232] | 612 | " PID PPID USER STAT VSZ %VSZ"
|
---|
[2725] | 613 | IF_FEATURE_TOP_SMP_PROCESS(" CPU")
|
---|
| 614 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(" %CPU")
|
---|
| 615 | " COMMAND");
|
---|
| 616 | lines_rem--;
|
---|
[1765] | 617 |
|
---|
| 618 | #if ENABLE_FEATURE_TOP_DECIMALS
|
---|
[2725] | 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"
|
---|
[1765] | 623 | #else
|
---|
[2725] | 624 | # define UPSCALE 100
|
---|
| 625 | # define CALC_STAT(name, val) unsigned name = (val)
|
---|
| 626 | # define SHOW_STAT(name) name
|
---|
| 627 | # define FMT "%4u%%"
|
---|
[1765] | 628 | #endif
|
---|
[821] | 629 | /*
|
---|
[3232] | 630 | * %VSZ = s->vsz/MemTotal
|
---|
[821] | 631 | */
|
---|
[1765] | 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 */
|
---|
[821] | 635 | while (pmem_scale >= 512) {
|
---|
| 636 | pmem_scale /= 4;
|
---|
| 637 | pmem_shift -= 2;
|
---|
| 638 | }
|
---|
[3232] | 639 | pmem_half = (1U << pmem_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
[1765] | 640 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[2725] | 641 | busy_jifs = cur_jif.busy - prev_jif.busy;
|
---|
[1765] | 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 |
|
---|
[821] | 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 | */
|
---|
[2725] | 650 | /* (cur_jif.xxx - prev_jif.xxx) and s->pcpu are
|
---|
[821] | 651 | * in 0..~64000 range (HZ*update_interval).
|
---|
| 652 | * we assume that unsigned is at least 32-bit.
|
---|
| 653 | */
|
---|
| 654 | pcpu_shift = 6;
|
---|
[2725] | 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))) {
|
---|
[821] | 659 | pcpu_scale *= 4;
|
---|
| 660 | pcpu_shift += 2;
|
---|
| 661 | }
|
---|
[2725] | 662 | tmp_unsigned = (uint16_t)(cur_jif.total - prev_jif.total) * total_pcpu;
|
---|
| 663 | if (tmp_unsigned != 0)
|
---|
| 664 | pcpu_scale /= tmp_unsigned;
|
---|
[821] | 665 | /* we want (s->pcpu * pcpu_scale) to never overflow */
|
---|
| 666 | while (pcpu_scale >= 1024) {
|
---|
| 667 | pcpu_scale /= 4;
|
---|
| 668 | pcpu_shift -= 2;
|
---|
| 669 | }
|
---|
[3232] | 670 | pcpu_half = (1U << pcpu_shift) / (ENABLE_FEATURE_TOP_DECIMALS ? 20 : 2);
|
---|
[821] | 671 | /* printf(" pmem_scale=%u pcpu_scale=%u ", pmem_scale, pcpu_scale); */
|
---|
| 672 | #endif
|
---|
| 673 |
|
---|
[2725] | 674 | /* Ok, all preliminary data is ready, go through the list */
|
---|
| 675 | scr_width += 2; /* account for leading '\n' and trailing NUL */
|
---|
[3232] | 676 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
| 677 | lines_rem = ntop - G_scroll_ofs;
|
---|
| 678 | s = top + G_scroll_ofs;
|
---|
[2725] | 679 | while (--lines_rem >= 0) {
|
---|
| 680 | unsigned col;
|
---|
[1765] | 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
|
---|
[821] | 685 |
|
---|
[2725] | 686 | if (s->vsz >= 100000)
|
---|
| 687 | sprintf(vsz_str_buf, "%6ldm", s->vsz/1024);
|
---|
[821] | 688 | else
|
---|
[3621] | 689 | sprintf(vsz_str_buf, "%7lu", s->vsz);
|
---|
[3232] | 690 | /* PID PPID USER STAT VSZ %VSZ [%CPU] COMMAND */
|
---|
[2725] | 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)
|
---|
[1765] | 695 | " ",
|
---|
| 696 | s->pid, s->ppid, get_cached_username(s->uid),
|
---|
| 697 | s->state, vsz_str_buf,
|
---|
| 698 | SHOW_STAT(pmem)
|
---|
[2725] | 699 | IF_FEATURE_TOP_SMP_PROCESS(, s->last_seen_on_cpu)
|
---|
| 700 | IF_FEATURE_TOP_CPU_USAGE_PERCENTAGE(, SHOW_STAT(pcpu))
|
---|
[1765] | 701 | );
|
---|
[2725] | 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);
|
---|
[821] | 705 | /* printf(" %d/%d %lld/%lld", s->pcpu, total_pcpu,
|
---|
[2725] | 706 | cur_jif.busy - prev_jif.busy, cur_jif.total - prev_jif.total); */
|
---|
[821] | 707 | s++;
|
---|
| 708 | }
|
---|
| 709 | /* printf(" %d", hist_iterations); */
|
---|
[2725] | 710 | bb_putchar(OPT_BATCH_MODE ? '\n' : '\r');
|
---|
| 711 | fflush_all();
|
---|
[821] | 712 | }
|
---|
[1765] | 713 | #undef UPSCALE
|
---|
| 714 | #undef SHOW_STAT
|
---|
| 715 | #undef CALC_STAT
|
---|
| 716 | #undef FMT
|
---|
[821] | 717 |
|
---|
| 718 | static void clearmems(void)
|
---|
| 719 | {
|
---|
[1765] | 720 | clear_username_cache();
|
---|
[821] | 721 | free(top);
|
---|
[2725] | 722 | top = NULL;
|
---|
[821] | 723 | }
|
---|
| 724 |
|
---|
[1765] | 725 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 726 |
|
---|
| 727 | static void reset_term(void)
|
---|
| 728 | {
|
---|
[3232] | 729 | if (!OPT_BATCH_MODE)
|
---|
| 730 | tcsetattr_stdin_TCSANOW(&initial_settings);
|
---|
[2725] | 731 | if (ENABLE_FEATURE_CLEAN_UP) {
|
---|
| 732 | clearmems();
|
---|
| 733 | # if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 734 | free(prev_hist);
|
---|
| 735 | # endif
|
---|
| 736 | }
|
---|
[821] | 737 | }
|
---|
| 738 |
|
---|
[3232] | 739 | static void sig_catcher(int sig)
|
---|
[821] | 740 | {
|
---|
| 741 | reset_term();
|
---|
[3232] | 742 | kill_myself_with_sig(sig);
|
---|
[821] | 743 | }
|
---|
[2725] | 744 |
|
---|
[1765] | 745 | #endif /* FEATURE_USE_TERMIOS */
|
---|
[821] | 746 |
|
---|
[2725] | 747 | /*
|
---|
| 748 | * TOPMEM support
|
---|
| 749 | */
|
---|
[821] | 750 |
|
---|
[2725] | 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)
|
---|
[821] | 773 | {
|
---|
[2725] | 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 | {
|
---|
[3621] | 793 | unsigned long meminfo[MI_MAX];
|
---|
[2725] | 794 |
|
---|
[3621] | 795 | parse_meminfo(meminfo);
|
---|
[2725] | 796 |
|
---|
| 797 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
[3621] | 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]);
|
---|
[2725] | 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,
|
---|
[3621] | 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]);
|
---|
[2725] | 812 | printf("%.*s\n", scr_width, line_buf);
|
---|
| 813 |
|
---|
| 814 | snprintf(line_buf, LINE_BUF_SIZE,
|
---|
[3621] | 815 | "Swap total:%lu free:%lu", // TODO: % used?
|
---|
| 816 | meminfo[MI_SWAPTOTAL],
|
---|
| 817 | meminfo[MI_SWAPFREE]);
|
---|
[2725] | 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 */
|
---|
[3621] | 826 | smart_ulltoa5(ul, buf, " mgtpezy")[0] = ' ';
|
---|
[2725] | 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)
|
---|
[3232] | 833 | const topmem_status_t *s = topmem + G_scroll_ofs;
|
---|
[3621] | 834 | char *cp, ch;
|
---|
[2725] | 835 |
|
---|
| 836 | display_topmem_header(scr_width, &lines_rem);
|
---|
[3621] | 837 |
|
---|
[2725] | 838 | strcpy(line_buf, HDR_STR " COMMAND");
|
---|
[3621] | 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 |
|
---|
[2725] | 845 | printf(OPT_BATCH_MODE ? "%.*s" : "\e[7m%.*s\e[0m", scr_width, line_buf);
|
---|
| 846 | lines_rem--;
|
---|
| 847 |
|
---|
[3232] | 848 | if (lines_rem > ntop - G_scroll_ofs)
|
---|
| 849 | lines_rem = ntop - G_scroll_ofs;
|
---|
[2725] | 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,
|
---|
[3232] | 897 | EXIT_MASK = (unsigned)-1,
|
---|
[2725] | 898 | };
|
---|
| 899 |
|
---|
[3232] | 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 |
|
---|
[2725] | 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;
|
---|
[3232] | 1090 | unsigned col;
|
---|
[2725] | 1091 | unsigned interval;
|
---|
| 1092 | char *str_interval, *str_iterations;
|
---|
| 1093 | unsigned scan_mask = TOP_MASK;
|
---|
[1765] | 1094 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[821] | 1095 | struct termios new_settings;
|
---|
[2725] | 1096 | #endif
|
---|
[1765] | 1097 |
|
---|
[2725] | 1098 | INIT_G();
|
---|
[821] | 1099 |
|
---|
[2725] | 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 |
|
---|
[821] | 1130 | /* change to /proc */
|
---|
[1765] | 1131 | xchdir("/proc");
|
---|
[821] | 1132 |
|
---|
[1765] | 1133 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[821] | 1134 | sort_function[0] = pcpu_sort;
|
---|
| 1135 | sort_function[1] = mem_sort;
|
---|
| 1136 | sort_function[2] = time_sort;
|
---|
| 1137 | #else
|
---|
[2725] | 1138 | sort_function[0] = mem_sort;
|
---|
| 1139 | #endif
|
---|
[821] | 1140 |
|
---|
[3232] | 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) {
|
---|
[1765] | 1160 | procps_status_t *p = NULL;
|
---|
[821] | 1161 |
|
---|
[3232] | 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;
|
---|
[1765] | 1168 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
[3232] | 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;
|
---|
[821] | 1178 | }
|
---|
| 1179 |
|
---|
| 1180 | /* read process IDs & status for all the processes */
|
---|
[3232] | 1181 | ntop = 0;
|
---|
[2725] | 1182 | while ((p = procps_scan(p, scan_mask)) != NULL) {
|
---|
| 1183 | int n;
|
---|
[3621] | 1184 |
|
---|
| 1185 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
---|
[2725] | 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;
|
---|
[1765] | 1191 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[2725] | 1192 | top[n].ticks = p->stime + p->utime;
|
---|
[1765] | 1193 | #endif
|
---|
[2725] | 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" */
|
---|
[821] | 1220 | if (ntop == 0) {
|
---|
[2725] | 1221 | bb_error_msg("no process info in /proc");
|
---|
| 1222 | break;
|
---|
[821] | 1223 | }
|
---|
[2725] | 1224 |
|
---|
[3621] | 1225 | IF_FEATURE_TOPMEM(if (scan_mask != TOPMEM_MASK)) {
|
---|
[1765] | 1226 | #if ENABLE_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
[2725] | 1227 | if (!prev_hist_count) {
|
---|
| 1228 | do_stats();
|
---|
| 1229 | usleep(100000);
|
---|
| 1230 | clearmems();
|
---|
| 1231 | continue;
|
---|
| 1232 | }
|
---|
[821] | 1233 | do_stats();
|
---|
[2725] | 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
|
---|
[3621] | 1239 | display_process_list(G.lines, col);
|
---|
[821] | 1240 | }
|
---|
[2725] | 1241 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 1242 | else { /* TOPMEM */
|
---|
| 1243 | qsort(topmem, ntop, sizeof(topmem_status_t), (void*)topmem_sort);
|
---|
[3621] | 1244 | display_topmem_process_list(G.lines, col);
|
---|
[2725] | 1245 | }
|
---|
| 1246 | #endif
|
---|
| 1247 | clearmems();
|
---|
| 1248 | if (iterations >= 0 && !--iterations)
|
---|
| 1249 | break;
|
---|
| 1250 | #if !ENABLE_FEATURE_USE_TERMIOS
|
---|
| 1251 | sleep(interval);
|
---|
[821] | 1252 | #else
|
---|
[3232] | 1253 | scan_mask = handle_input(scan_mask, interval);
|
---|
[3621] | 1254 | #endif
|
---|
[3232] | 1255 | } /* end of "while (not Q)" */
|
---|
[2725] | 1256 |
|
---|
| 1257 | bb_putchar('\n');
|
---|
| 1258 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
| 1259 | reset_term();
|
---|
| 1260 | #endif
|
---|
[821] | 1261 | return EXIT_SUCCESS;
|
---|
| 1262 | }
|
---|