1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * A mini 'powertop' utility:
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4 | * Analyze power consumption on Intel-based laptops.
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5 | * Based on powertop 1.11.
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6 | *
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7 | * Copyright (C) 2010 Marek Polacek <mmpolacek@gmail.com>
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8 | *
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9 | * Licensed under GPLv2, see file LICENSE in this source tree.
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10 | */
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11 |
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12 | //applet:IF_POWERTOP(APPLET(powertop, BB_DIR_USR_SBIN, BB_SUID_DROP))
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13 |
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14 | //kbuild:lib-$(CONFIG_POWERTOP) += powertop.o
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15 |
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16 | //config:config POWERTOP
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17 | //config: bool "powertop"
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18 | //config: default y
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19 | //config: help
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20 | //config: Analyze power consumption on Intel-based laptops
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21 |
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22 | // XXX This should be configurable
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23 | #define ENABLE_FEATURE_POWERTOP_PROCIRQ 1
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24 |
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25 | #include "libbb.h"
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26 |
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27 |
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28 | //#define debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
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29 | #define debug(fmt, ...) ((void)0)
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30 |
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31 |
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32 | #define BLOATY_HPET_IRQ_NUM_DETECTION 0
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33 | #define MAX_CSTATE_COUNT 8
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34 | #define IRQCOUNT 40
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35 |
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36 |
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37 | #define DEFAULT_SLEEP 10
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38 | #define DEFAULT_SLEEP_STR "10"
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39 |
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40 | /* Frequency of the ACPI timer */
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41 | #define FREQ_ACPI 3579.545
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42 | #define FREQ_ACPI_1000 3579545
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43 |
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44 | /* Max filename length of entry in /sys/devices subsystem */
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45 | #define BIG_SYSNAME_LEN 16
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46 |
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47 | typedef unsigned long long ullong;
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48 |
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49 | struct line {
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50 | char *string;
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51 | int count;
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52 | /*int disk_count;*/
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53 | };
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54 |
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55 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ
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56 | struct irqdata {
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57 | smallint active;
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58 | int number;
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59 | ullong count;
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60 | char irq_desc[32];
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61 | };
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62 | #endif
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63 |
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64 | struct globals {
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65 | struct line *lines; /* the most often used member */
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66 | int lines_cnt;
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67 | int lines_cumulative_count;
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68 | int maxcstate;
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69 | unsigned total_cpus;
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70 | smallint cant_enable_timer_stats;
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71 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ
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72 | # if BLOATY_HPET_IRQ_NUM_DETECTION
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73 | smallint scanned_timer_list;
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74 | int percpu_hpet_start;
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75 | int percpu_hpet_end;
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76 | # endif
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77 | int interrupt_0;
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78 | int total_interrupt;
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79 | struct irqdata interrupts[IRQCOUNT];
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80 | #endif
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81 | ullong start_usage[MAX_CSTATE_COUNT];
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82 | ullong last_usage[MAX_CSTATE_COUNT];
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83 | ullong start_duration[MAX_CSTATE_COUNT];
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84 | ullong last_duration[MAX_CSTATE_COUNT];
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85 | #if ENABLE_FEATURE_USE_TERMIOS
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86 | struct termios init_settings;
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87 | #endif
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88 | };
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89 | #define G (*ptr_to_globals)
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90 | #define INIT_G() do { \
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91 | SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
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92 | } while (0)
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93 |
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94 | #if ENABLE_FEATURE_USE_TERMIOS
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95 | static void reset_term(void)
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96 | {
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97 | tcsetattr_stdin_TCSANOW(&G.init_settings);
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98 | }
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99 |
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100 | static void sig_handler(int signo UNUSED_PARAM)
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101 | {
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102 | reset_term();
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103 | _exit(EXIT_FAILURE);
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104 | }
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105 | #endif
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106 |
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107 | static int write_str_to_file(const char *fname, const char *str)
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108 | {
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109 | FILE *fp = fopen_for_write(fname);
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110 | if (!fp)
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111 | return 1;
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112 | fputs(str, fp);
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113 | fclose(fp);
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114 | return 0;
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115 | }
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116 |
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117 | /* Make it more readable */
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118 | #define start_timer() write_str_to_file("/proc/timer_stats", "1\n")
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119 | #define stop_timer() write_str_to_file("/proc/timer_stats", "0\n")
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120 |
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121 | static NOINLINE void clear_lines(void)
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122 | {
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123 | int i;
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124 | if (G.lines) {
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125 | for (i = 0; i < G.lines_cnt; i++)
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126 | free(G.lines[i].string);
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127 | free(G.lines);
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128 | G.lines_cnt = 0;
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129 | G.lines = NULL;
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130 | }
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131 | }
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132 |
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133 | static void update_lines_cumulative_count(void)
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134 | {
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135 | int i;
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136 | for (i = 0; i < G.lines_cnt; i++)
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137 | G.lines_cumulative_count += G.lines[i].count;
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138 | }
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139 |
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140 | static int line_compare(const void *p1, const void *p2)
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141 | {
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142 | const struct line *a = p1;
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143 | const struct line *b = p2;
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144 | return (b->count /*+ 50 * b->disk_count*/) - (a->count /*+ 50 * a->disk_count*/);
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145 | }
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146 |
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147 | static void sort_lines(void)
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148 | {
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149 | qsort(G.lines, G.lines_cnt, sizeof(G.lines[0]), line_compare);
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150 | }
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151 |
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152 | /* Save C-state usage and duration. Also update maxcstate. */
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153 | static void read_cstate_counts(ullong *usage, ullong *duration)
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154 | {
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155 | DIR *dir;
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156 | struct dirent *d;
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157 |
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158 | dir = opendir("/proc/acpi/processor");
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159 | if (!dir)
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160 | return;
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161 |
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162 | while ((d = readdir(dir)) != NULL) {
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163 | FILE *fp;
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164 | char buf[192];
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165 | int level;
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166 | int len;
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167 |
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168 | len = strlen(d->d_name); /* "CPUnn" */
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169 | if (len < 3 || len > BIG_SYSNAME_LEN)
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170 | continue;
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171 |
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172 | sprintf(buf, "%s/%s/power", "/proc/acpi/processor", d->d_name);
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173 | fp = fopen_for_read(buf);
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174 | if (!fp)
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175 | continue;
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176 |
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177 | // Example file contents:
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178 | // active state: C0
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179 | // max_cstate: C8
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180 | // maximum allowed latency: 2000000000 usec
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181 | // states:
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182 | // C1: type[C1] promotion[--] demotion[--] latency[001] usage[00006173] duration[00000000000000000000]
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183 | // C2: type[C2] promotion[--] demotion[--] latency[001] usage[00085191] duration[00000000000083024907]
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184 | // C3: type[C3] promotion[--] demotion[--] latency[017] usage[01017622] duration[00000000017921327182]
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185 | level = 0;
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186 | while (fgets(buf, sizeof(buf), fp)) {
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187 | char *p = strstr(buf, "age[");
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188 | if (!p)
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189 | continue;
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190 | p += 4;
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191 | usage[level] += bb_strtoull(p, NULL, 10) + 1;
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192 | p = strstr(buf, "ation[");
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193 | if (!p)
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194 | continue;
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195 | p += 6;
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196 | duration[level] += bb_strtoull(p, NULL, 10);
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197 |
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198 | if (level >= MAX_CSTATE_COUNT-1)
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199 | break;
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200 | level++;
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201 | if (level > G.maxcstate) /* update maxcstate */
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202 | G.maxcstate = level;
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203 | }
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204 | fclose(fp);
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205 | }
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206 | closedir(dir);
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207 | }
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208 |
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209 | /* Add line and/or update count */
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210 | static void save_line(const char *string, int count)
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211 | {
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212 | int i;
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213 | for (i = 0; i < G.lines_cnt; i++) {
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214 | if (strcmp(string, G.lines[i].string) == 0) {
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215 | /* It's already there, only update count */
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216 | G.lines[i].count += count;
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217 | return;
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218 | }
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219 | }
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220 |
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221 | /* Add new line */
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222 | G.lines = xrealloc_vector(G.lines, 4, G.lines_cnt);
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223 | G.lines[G.lines_cnt].string = xstrdup(string);
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224 | G.lines[G.lines_cnt].count = count;
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225 | /*G.lines[G.lines_cnt].disk_count = 0;*/
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226 | G.lines_cnt++;
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227 | }
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228 |
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229 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ
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230 | static int is_hpet_irq(const char *name)
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231 | {
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232 | char *p;
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233 | # if BLOATY_HPET_IRQ_NUM_DETECTION
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234 | long hpet_chan;
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235 |
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236 | /* Learn the range of existing hpet timers. This is done once */
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237 | if (!G.scanned_timer_list) {
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238 | FILE *fp;
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239 | char buf[80];
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240 |
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241 | G.scanned_timer_list = true;
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242 | fp = fopen_for_read("/proc/timer_list");
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243 | if (!fp)
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244 | return 0;
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245 |
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246 | while (fgets(buf, sizeof(buf), fp)) {
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247 | p = strstr(buf, "Clock Event Device: hpet");
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248 | if (!p)
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249 | continue;
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250 | p += sizeof("Clock Event Device: hpet")-1;
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251 | if (!isdigit(*p))
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252 | continue;
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253 | hpet_chan = xatoi_positive(p);
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254 | if (hpet_chan < G.percpu_hpet_start)
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255 | G.percpu_hpet_start = hpet_chan;
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256 | if (hpet_chan > G.percpu_hpet_end)
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257 | G.percpu_hpet_end = hpet_chan;
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258 | }
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259 | fclose(fp);
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260 | }
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261 | # endif
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262 | //TODO: optimize
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263 | p = strstr(name, "hpet");
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264 | if (!p)
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265 | return 0;
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266 | p += 4;
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267 | if (!isdigit(*p))
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268 | return 0;
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269 | # if BLOATY_HPET_IRQ_NUM_DETECTION
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270 | hpet_chan = xatoi_positive(p);
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271 | if (hpet_chan < G.percpu_hpet_start || hpet_chan > G.percpu_hpet_end)
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272 | return 0;
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273 | # endif
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274 | return 1;
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275 | }
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276 |
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277 | /* Save new IRQ count, return delta from old one */
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278 | static int save_irq_count(int irq, ullong count)
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279 | {
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280 | int unused = IRQCOUNT;
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281 | int i;
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282 | for (i = 0; i < IRQCOUNT; i++) {
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283 | if (G.interrupts[i].active && G.interrupts[i].number == irq) {
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284 | ullong old = G.interrupts[i].count;
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285 | G.interrupts[i].count = count;
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286 | return count - old;
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287 | }
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288 | if (!G.interrupts[i].active && unused > i)
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289 | unused = i;
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290 | }
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291 | if (unused < IRQCOUNT) {
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292 | G.interrupts[unused].active = 1;
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293 | G.interrupts[unused].count = count;
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294 | G.interrupts[unused].number = irq;
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295 | }
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296 | return count;
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297 | }
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298 |
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299 | /* Read /proc/interrupts, save IRQ counts and IRQ description */
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300 | static void process_irq_counts(void)
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301 | {
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302 | FILE *fp;
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303 | char buf[128];
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304 |
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305 | /* Reset values */
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306 | G.interrupt_0 = 0;
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307 | G.total_interrupt = 0;
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308 |
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309 | fp = xfopen_for_read("/proc/interrupts");
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310 | while (fgets(buf, sizeof(buf), fp)) {
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311 | char irq_desc[sizeof(" <kernel IPI> : ") + sizeof(buf)];
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312 | char *p;
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313 | const char *name;
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314 | int nr;
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315 | ullong count;
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316 | ullong delta;
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317 |
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318 | p = strchr(buf, ':');
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319 | if (!p)
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320 | continue;
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321 | /* 0: 143646045 153901007 IO-APIC-edge timer
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322 | * ^
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323 | */
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324 | *p = '\0';
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325 | /* Deal with non-maskable interrupts -- make up fake numbers */
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326 | nr = index_in_strings("NMI\0RES\0CAL\0TLB\0TRM\0THR\0SPU\0", buf);
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327 | if (nr >= 0) {
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328 | nr += 20000;
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329 | } else {
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330 | /* bb_strtou doesn't eat leading spaces, using strtoul */
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331 | errno = 0;
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332 | nr = strtoul(buf, NULL, 10);
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333 | if (errno)
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334 | continue;
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335 | }
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336 | p++;
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337 | /* 0: 143646045 153901007 IO-APIC-edge timer
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338 | * ^
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339 | */
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340 | /* Sum counts for this IRQ */
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341 | count = 0;
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342 | while (1) {
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343 | char *tmp;
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344 | p = skip_whitespace(p);
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345 | if (!isdigit(*p))
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346 | break;
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347 | count += bb_strtoull(p, &tmp, 10);
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348 | p = tmp;
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349 | }
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350 | /* 0: 143646045 153901007 IO-APIC-edge timer
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351 | * NMI: 1 2 Non-maskable interrupts
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352 | * ^
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353 | */
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354 | if (nr < 20000) {
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355 | /* Skip to the interrupt name, e.g. 'timer' */
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356 | p = strchr(p, ' ');
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357 | if (!p)
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358 | continue;
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359 | p = skip_whitespace(p);
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360 | }
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361 |
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362 | name = p;
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363 | chomp(p);
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364 | /* Save description of the interrupt */
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365 | if (nr >= 20000)
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366 | sprintf(irq_desc, " <kernel IPI> : %s", name);
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367 | else
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368 | sprintf(irq_desc, " <interrupt> : %s", name);
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369 |
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370 | delta = save_irq_count(nr, count);
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371 |
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372 | /* Skip per CPU timer interrupts */
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373 | if (is_hpet_irq(name))
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374 | continue;
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375 |
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376 | if (nr != 0 && delta != 0)
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377 | save_line(irq_desc, delta);
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378 |
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379 | if (nr == 0)
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380 | G.interrupt_0 = delta;
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381 | else
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382 | G.total_interrupt += delta;
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383 | }
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384 |
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385 | fclose(fp);
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386 | }
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387 | #else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */
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388 | # define process_irq_counts() ((void)0)
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389 | #endif
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390 |
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391 | static NOINLINE int process_timer_stats(void)
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392 | {
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393 | char buf[128];
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394 | char line[15 + 3 + 128];
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395 | int n;
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396 | FILE *fp;
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397 |
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398 | buf[0] = '\0';
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399 |
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400 | n = 0;
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401 | fp = NULL;
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402 | if (!G.cant_enable_timer_stats)
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403 | fp = fopen_for_read("/proc/timer_stats");
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404 | if (fp) {
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405 | // Example file contents:
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406 | // Timer Stats Version: v0.2
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407 | // Sample period: 1.329 s
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408 | // 76, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
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409 | // 88, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
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410 | // 24, 3787 firefox hrtimer_start_range_ns (hrtimer_wakeup)
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411 | // 46D, 1136 kondemand/1 do_dbs_timer (delayed_work_timer_fn)
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412 | // ...
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413 | // 1, 1656 Xorg hrtimer_start_range_ns (hrtimer_wakeup)
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414 | // 1, 2159 udisks-daemon hrtimer_start_range_ns (hrtimer_wakeup)
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415 | // 331 total events, 249.059 events/sec
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416 | while (fgets(buf, sizeof(buf), fp)) {
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417 | const char *count, *process, *func;
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418 | char *p;
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419 | int idx;
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420 | unsigned cnt;
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421 |
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422 | count = skip_whitespace(buf);
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423 | p = strchr(count, ',');
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424 | if (!p)
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425 | continue;
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426 | *p++ = '\0';
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427 | cnt = bb_strtou(count, NULL, 10);
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428 | if (strcmp(skip_non_whitespace(count), " total events") == 0) {
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429 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ
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430 | n = cnt / G.total_cpus;
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431 | if (n > 0 && n < G.interrupt_0) {
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432 | sprintf(line, " <interrupt> : %s", "extra timer interrupt");
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433 | save_line(line, G.interrupt_0 - n);
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434 | }
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435 | #endif
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436 | break;
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437 | }
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438 | if (strchr(count, 'D'))
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439 | continue; /* deferred */
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440 | p = skip_whitespace(p); /* points to pid now */
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441 | process = NULL;
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442 | get_func_name:
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443 | p = strchr(p, ' ');
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444 | if (!p)
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445 | continue;
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446 | *p++ = '\0';
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447 | p = skip_whitespace(p);
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448 | if (process == NULL) {
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449 | process = p;
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450 | goto get_func_name;
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451 | }
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452 | func = p;
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453 |
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454 | //if (strcmp(process, "swapper") == 0
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455 | // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0
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456 | //) {
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457 | // process = "[kernel scheduler]";
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458 | // func = "Load balancing tick";
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459 | //}
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460 |
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461 | if (is_prefixed_with(func, "tick_nohz_"))
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462 | continue;
|
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463 | if (is_prefixed_with(func, "tick_setup_sched_timer"))
|
---|
464 | continue;
|
---|
465 | //if (strcmp(process, "powertop") == 0)
|
---|
466 | // continue;
|
---|
467 |
|
---|
468 | idx = index_in_strings("insmod\0modprobe\0swapper\0", process);
|
---|
469 | if (idx != -1) {
|
---|
470 | process = idx < 2 ? "[kernel module]" : "<kernel core>";
|
---|
471 | }
|
---|
472 |
|
---|
473 | chomp(p);
|
---|
474 |
|
---|
475 | // 46D\01136\0kondemand/1\0do_dbs_timer (delayed_work_timer_fn)
|
---|
476 | // ^ ^ ^
|
---|
477 | // count process func
|
---|
478 |
|
---|
479 | //if (strchr(process, '['))
|
---|
480 | sprintf(line, "%15.15s : %s", process, func);
|
---|
481 | //else
|
---|
482 | // sprintf(line, "%s", process);
|
---|
483 | save_line(line, cnt);
|
---|
484 | }
|
---|
485 | fclose(fp);
|
---|
486 | }
|
---|
487 |
|
---|
488 | return n;
|
---|
489 | }
|
---|
490 |
|
---|
491 | #ifdef __i386__
|
---|
492 | /*
|
---|
493 | * Get information about CPU using CPUID opcode.
|
---|
494 | */
|
---|
495 | static void cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx,
|
---|
496 | unsigned int *edx)
|
---|
497 | {
|
---|
498 | /* EAX value specifies what information to return */
|
---|
499 | __asm__(
|
---|
500 | " pushl %%ebx\n" /* Save EBX */
|
---|
501 | " cpuid\n"
|
---|
502 | " movl %%ebx, %1\n" /* Save content of EBX */
|
---|
503 | " popl %%ebx\n" /* Restore EBX */
|
---|
504 | : "=a"(*eax), /* Output */
|
---|
505 | "=r"(*ebx),
|
---|
506 | "=c"(*ecx),
|
---|
507 | "=d"(*edx)
|
---|
508 | : "0"(*eax), /* Input */
|
---|
509 | "1"(*ebx),
|
---|
510 | "2"(*ecx),
|
---|
511 | "3"(*edx)
|
---|
512 | /* No clobbered registers */
|
---|
513 | );
|
---|
514 | }
|
---|
515 | #endif
|
---|
516 |
|
---|
517 | #ifdef __i386__
|
---|
518 | static NOINLINE void print_intel_cstates(void)
|
---|
519 | {
|
---|
520 | int bios_table[8] = { 0 };
|
---|
521 | int nbios = 0;
|
---|
522 | DIR *cpudir;
|
---|
523 | struct dirent *d;
|
---|
524 | int i;
|
---|
525 | unsigned eax, ebx, ecx, edx;
|
---|
526 |
|
---|
527 | cpudir = opendir("/sys/devices/system/cpu");
|
---|
528 | if (!cpudir)
|
---|
529 | return;
|
---|
530 |
|
---|
531 | /* Loop over cpuN entries */
|
---|
532 | while ((d = readdir(cpudir)) != NULL) {
|
---|
533 | DIR *dir;
|
---|
534 | int len;
|
---|
535 | char fname[sizeof("/sys/devices/system/cpu//cpuidle//desc") + 2*BIG_SYSNAME_LEN];
|
---|
536 |
|
---|
537 | len = strlen(d->d_name);
|
---|
538 | if (len < 3 || len > BIG_SYSNAME_LEN)
|
---|
539 | continue;
|
---|
540 |
|
---|
541 | if (!isdigit(d->d_name[3]))
|
---|
542 | continue;
|
---|
543 |
|
---|
544 | len = sprintf(fname, "%s/%s/cpuidle", "/sys/devices/system/cpu", d->d_name);
|
---|
545 | dir = opendir(fname);
|
---|
546 | if (!dir)
|
---|
547 | continue;
|
---|
548 |
|
---|
549 | /*
|
---|
550 | * Every C-state has its own stateN directory, that
|
---|
551 | * contains a 'time' and a 'usage' file.
|
---|
552 | */
|
---|
553 | while ((d = readdir(dir)) != NULL) {
|
---|
554 | FILE *fp;
|
---|
555 | char buf[64];
|
---|
556 | int n;
|
---|
557 |
|
---|
558 | n = strlen(d->d_name);
|
---|
559 | if (n < 3 || n > BIG_SYSNAME_LEN)
|
---|
560 | continue;
|
---|
561 |
|
---|
562 | sprintf(fname + len, "/%s/desc", d->d_name);
|
---|
563 | fp = fopen_for_read(fname);
|
---|
564 | if (fp) {
|
---|
565 | char *p = fgets(buf, sizeof(buf), fp);
|
---|
566 | fclose(fp);
|
---|
567 | if (!p)
|
---|
568 | break;
|
---|
569 | p = strstr(p, "MWAIT ");
|
---|
570 | if (p) {
|
---|
571 | int pos;
|
---|
572 | p += sizeof("MWAIT ") - 1;
|
---|
573 | pos = (bb_strtoull(p, NULL, 16) >> 4) + 1;
|
---|
574 | if (pos >= ARRAY_SIZE(bios_table))
|
---|
575 | continue;
|
---|
576 | bios_table[pos]++;
|
---|
577 | nbios++;
|
---|
578 | }
|
---|
579 | }
|
---|
580 | }
|
---|
581 | closedir(dir);
|
---|
582 | }
|
---|
583 | closedir(cpudir);
|
---|
584 |
|
---|
585 | if (!nbios)
|
---|
586 | return;
|
---|
587 |
|
---|
588 | eax = 5;
|
---|
589 | ebx = ecx = edx = 0;
|
---|
590 | cpuid(&eax, &ebx, &ecx, &edx);
|
---|
591 | if (!edx || !(ecx & 1))
|
---|
592 | return;
|
---|
593 |
|
---|
594 | printf("Your %s the following C-states: ", "CPU supports");
|
---|
595 | i = 0;
|
---|
596 | while (edx) {
|
---|
597 | if (edx & 7)
|
---|
598 | printf("C%u ", i);
|
---|
599 | edx >>= 4;
|
---|
600 | i++;
|
---|
601 | }
|
---|
602 | bb_putchar('\n');
|
---|
603 |
|
---|
604 | /* Print BIOS C-States */
|
---|
605 | printf("Your %s the following C-states: ", "BIOS reports");
|
---|
606 | for (i = 0; i < ARRAY_SIZE(bios_table); i++)
|
---|
607 | if (bios_table[i])
|
---|
608 | printf("C%u ", i);
|
---|
609 |
|
---|
610 | bb_putchar('\n');
|
---|
611 | }
|
---|
612 | #else
|
---|
613 | # define print_intel_cstates() ((void)0)
|
---|
614 | #endif
|
---|
615 |
|
---|
616 | static void show_timerstats(void)
|
---|
617 | {
|
---|
618 | unsigned lines;
|
---|
619 |
|
---|
620 | /* Get terminal height */
|
---|
621 | get_terminal_width_height(STDOUT_FILENO, NULL, &lines);
|
---|
622 |
|
---|
623 | /* We don't have whole terminal just for timerstats */
|
---|
624 | lines -= 12;
|
---|
625 |
|
---|
626 | if (!G.cant_enable_timer_stats) {
|
---|
627 | int i, n = 0;
|
---|
628 | char strbuf6[6];
|
---|
629 |
|
---|
630 | puts("\nTop causes for wakeups:");
|
---|
631 | for (i = 0; i < G.lines_cnt; i++) {
|
---|
632 | if ((G.lines[i].count > 0 /*|| G.lines[i].disk_count > 0*/)
|
---|
633 | && n++ < lines
|
---|
634 | ) {
|
---|
635 | /* NB: upstream powertop prints "(wakeups/sec)",
|
---|
636 | * we print just "(wakeup counts)".
|
---|
637 | */
|
---|
638 | /*char c = ' ';
|
---|
639 | if (G.lines[i].disk_count)
|
---|
640 | c = 'D';*/
|
---|
641 | smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY")[0] = '\0';
|
---|
642 | printf(/*" %5.1f%% (%s)%c %s\n"*/
|
---|
643 | " %5.1f%% (%s) %s\n",
|
---|
644 | G.lines[i].count * 100.0 / G.lines_cumulative_count,
|
---|
645 | strbuf6, /*c,*/
|
---|
646 | G.lines[i].string);
|
---|
647 | }
|
---|
648 | }
|
---|
649 | } else {
|
---|
650 | bb_putchar('\n');
|
---|
651 | bb_error_msg("no stats available; run as root or"
|
---|
652 | " enable the timer_stats module");
|
---|
653 | }
|
---|
654 | }
|
---|
655 |
|
---|
656 | // Example display from powertop version 1.11
|
---|
657 | // Cn Avg residency P-states (frequencies)
|
---|
658 | // C0 (cpu running) ( 0.5%) 2.00 Ghz 0.0%
|
---|
659 | // polling 0.0ms ( 0.0%) 1.67 Ghz 0.0%
|
---|
660 | // C1 mwait 0.0ms ( 0.0%) 1333 Mhz 0.1%
|
---|
661 | // C2 mwait 0.1ms ( 0.1%) 1000 Mhz 99.9%
|
---|
662 | // C3 mwait 12.1ms (99.4%)
|
---|
663 | //
|
---|
664 | // Wakeups-from-idle per second : 93.6 interval: 15.0s
|
---|
665 | // no ACPI power usage estimate available
|
---|
666 | //
|
---|
667 | // Top causes for wakeups:
|
---|
668 | // 32.4% ( 26.7) <interrupt> : extra timer interrupt
|
---|
669 | // 29.0% ( 23.9) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
|
---|
670 | // 9.0% ( 7.5) <kernel core> : hrtimer_start (tick_sched_timer)
|
---|
671 | // 6.5% ( 5.3) <interrupt> : ata_piix
|
---|
672 | // 5.0% ( 4.1) inetd : hrtimer_start_range_ns (hrtimer_wakeup)
|
---|
673 |
|
---|
674 | //usage:#define powertop_trivial_usage
|
---|
675 | //usage: ""
|
---|
676 | //usage:#define powertop_full_usage "\n\n"
|
---|
677 | //usage: "Analyze power consumption on Intel-based laptops"
|
---|
678 |
|
---|
679 | int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
|
---|
680 | int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)
|
---|
681 | {
|
---|
682 | ullong cur_usage[MAX_CSTATE_COUNT];
|
---|
683 | ullong cur_duration[MAX_CSTATE_COUNT];
|
---|
684 | char cstate_lines[MAX_CSTATE_COUNT + 2][64];
|
---|
685 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
686 | struct termios new_settings;
|
---|
687 | struct pollfd pfd[1];
|
---|
688 |
|
---|
689 | pfd[0].fd = 0;
|
---|
690 | pfd[0].events = POLLIN;
|
---|
691 | #endif
|
---|
692 |
|
---|
693 | INIT_G();
|
---|
694 |
|
---|
695 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ && BLOATY_HPET_IRQ_NUM_DETECTION
|
---|
696 | G.percpu_hpet_start = INT_MAX;
|
---|
697 | G.percpu_hpet_end = INT_MIN;
|
---|
698 | #endif
|
---|
699 |
|
---|
700 | /* Print warning when we don't have superuser privileges */
|
---|
701 | if (geteuid() != 0)
|
---|
702 | bb_error_msg("run as root to collect enough information");
|
---|
703 |
|
---|
704 | /* Get number of CPUs */
|
---|
705 | G.total_cpus = get_cpu_count();
|
---|
706 |
|
---|
707 | puts("Collecting data for "DEFAULT_SLEEP_STR" seconds");
|
---|
708 |
|
---|
709 | #if ENABLE_FEATURE_USE_TERMIOS
|
---|
710 | tcgetattr(0, (void *)&G.init_settings);
|
---|
711 | memcpy(&new_settings, &G.init_settings, sizeof(new_settings));
|
---|
712 | /* Turn on unbuffered input, turn off echoing */
|
---|
713 | new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
|
---|
714 | /* So we don't forget to reset term settings */
|
---|
715 | atexit(reset_term);
|
---|
716 | bb_signals(BB_FATAL_SIGS, sig_handler);
|
---|
717 | tcsetattr_stdin_TCSANOW(&new_settings);
|
---|
718 | #endif
|
---|
719 |
|
---|
720 | /* Collect initial data */
|
---|
721 | process_irq_counts();
|
---|
722 |
|
---|
723 | /* Read initial usage and duration */
|
---|
724 | read_cstate_counts(G.start_usage, G.start_duration);
|
---|
725 |
|
---|
726 | /* Copy them to "last" */
|
---|
727 | memcpy(G.last_usage, G.start_usage, sizeof(G.last_usage));
|
---|
728 | memcpy(G.last_duration, G.start_duration, sizeof(G.last_duration));
|
---|
729 |
|
---|
730 | /* Display C-states */
|
---|
731 | print_intel_cstates();
|
---|
732 |
|
---|
733 | G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
|
---|
734 |
|
---|
735 | /* The main loop */
|
---|
736 | for (;;) {
|
---|
737 | //double maxsleep = 0.0;
|
---|
738 | ullong totalticks, totalevents;
|
---|
739 | int i;
|
---|
740 |
|
---|
741 | G.cant_enable_timer_stats |= start_timer(); /* 1 on error */
|
---|
742 | #if !ENABLE_FEATURE_USE_TERMIOS
|
---|
743 | sleep(DEFAULT_SLEEP);
|
---|
744 | #else
|
---|
745 | if (safe_poll(pfd, 1, DEFAULT_SLEEP * 1000) > 0) {
|
---|
746 | unsigned char c;
|
---|
747 | if (safe_read(STDIN_FILENO, &c, 1) != 1)
|
---|
748 | break; /* EOF/error */
|
---|
749 | if (c == G.init_settings.c_cc[VINTR])
|
---|
750 | break; /* ^C */
|
---|
751 | if ((c | 0x20) == 'q')
|
---|
752 | break;
|
---|
753 | }
|
---|
754 | #endif
|
---|
755 | G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
|
---|
756 |
|
---|
757 | clear_lines();
|
---|
758 | process_irq_counts();
|
---|
759 |
|
---|
760 | /* Clear the stats */
|
---|
761 | memset(cur_duration, 0, sizeof(cur_duration));
|
---|
762 | memset(cur_usage, 0, sizeof(cur_usage));
|
---|
763 |
|
---|
764 | /* Read them */
|
---|
765 | read_cstate_counts(cur_usage, cur_duration);
|
---|
766 |
|
---|
767 | /* Count totalticks and totalevents */
|
---|
768 | totalticks = totalevents = 0;
|
---|
769 | for (i = 0; i < MAX_CSTATE_COUNT; i++) {
|
---|
770 | if (cur_usage[i] != 0) {
|
---|
771 | totalticks += cur_duration[i] - G.last_duration[i];
|
---|
772 | totalevents += cur_usage[i] - G.last_usage[i];
|
---|
773 | }
|
---|
774 | }
|
---|
775 |
|
---|
776 | /* Clear the screen */
|
---|
777 | printf("\033[H\033[J");
|
---|
778 |
|
---|
779 | /* Clear C-state lines */
|
---|
780 | memset(&cstate_lines, 0, sizeof(cstate_lines));
|
---|
781 |
|
---|
782 | if (totalevents == 0 && G.maxcstate <= 1) {
|
---|
783 | /* This should not happen */
|
---|
784 | strcpy(cstate_lines[0], "C-state information is not available\n");
|
---|
785 | } else {
|
---|
786 | double percentage;
|
---|
787 | unsigned newticks;
|
---|
788 |
|
---|
789 | newticks = G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000 - totalticks;
|
---|
790 | /* Handle rounding errors: do not display negative values */
|
---|
791 | if ((int)newticks < 0)
|
---|
792 | newticks = 0;
|
---|
793 |
|
---|
794 | sprintf(cstate_lines[0], "Cn\t\t Avg residency\n");
|
---|
795 | percentage = newticks * 100.0 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
|
---|
796 | sprintf(cstate_lines[1], "C0 (cpu running) (%4.1f%%)\n", percentage);
|
---|
797 |
|
---|
798 | /* Compute values for individual C-states */
|
---|
799 | for (i = 0; i < MAX_CSTATE_COUNT; i++) {
|
---|
800 | if (cur_usage[i] != 0) {
|
---|
801 | double slept;
|
---|
802 | slept = (cur_duration[i] - G.last_duration[i])
|
---|
803 | / (cur_usage[i] - G.last_usage[i] + 0.1) / FREQ_ACPI;
|
---|
804 | percentage = (cur_duration[i] - G.last_duration[i]) * 100
|
---|
805 | / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
|
---|
806 | sprintf(cstate_lines[i + 2], "C%u\t\t%5.1fms (%4.1f%%)\n",
|
---|
807 | i + 1, slept, percentage);
|
---|
808 | //if (maxsleep < slept)
|
---|
809 | // maxsleep = slept;
|
---|
810 | }
|
---|
811 | }
|
---|
812 | }
|
---|
813 |
|
---|
814 | for (i = 0; i < MAX_CSTATE_COUNT + 2; i++)
|
---|
815 | if (cstate_lines[i][0])
|
---|
816 | fputs(cstate_lines[i], stdout);
|
---|
817 |
|
---|
818 | i = process_timer_stats();
|
---|
819 | #if ENABLE_FEATURE_POWERTOP_PROCIRQ
|
---|
820 | if (totalevents == 0) {
|
---|
821 | /* No C-state info available, use timerstats */
|
---|
822 | totalevents = i * G.total_cpus + G.total_interrupt;
|
---|
823 | if (i < 0)
|
---|
824 | totalevents += G.interrupt_0 - i;
|
---|
825 | }
|
---|
826 | #endif
|
---|
827 | /* Upstream powertop prints wakeups per sec per CPU,
|
---|
828 | * we print just raw wakeup counts.
|
---|
829 | */
|
---|
830 | //TODO: show real seconds (think about manual refresh)
|
---|
831 | printf("\nWakeups-from-idle in %u seconds: %llu\n",
|
---|
832 | DEFAULT_SLEEP,
|
---|
833 | totalevents
|
---|
834 | );
|
---|
835 |
|
---|
836 | update_lines_cumulative_count();
|
---|
837 | sort_lines();
|
---|
838 | show_timerstats();
|
---|
839 | fflush(stdout);
|
---|
840 |
|
---|
841 | /* Clear the stats */
|
---|
842 | memset(cur_duration, 0, sizeof(cur_duration));
|
---|
843 | memset(cur_usage, 0, sizeof(cur_usage));
|
---|
844 |
|
---|
845 | /* Get new values */
|
---|
846 | read_cstate_counts(cur_usage, cur_duration);
|
---|
847 |
|
---|
848 | /* Save them */
|
---|
849 | memcpy(G.last_usage, cur_usage, sizeof(G.last_usage));
|
---|
850 | memcpy(G.last_duration, cur_duration, sizeof(G.last_duration));
|
---|
851 | } /* for (;;) */
|
---|
852 |
|
---|
853 | bb_putchar('\n');
|
---|
854 |
|
---|
855 | return EXIT_SUCCESS;
|
---|
856 | }
|
---|