[2725] | 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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[3232] | 12 | //applet:IF_POWERTOP(APPLET(powertop, BB_DIR_USR_SBIN, BB_SUID_DROP))
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[2725] | 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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[3621] | 363 | chomp(p);
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[2725] | 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 | }
|
---|
| 438 | if (strchr(count, 'D'))
|
---|
| 439 | continue; /* deferred */
|
---|
| 440 | p = skip_whitespace(p); /* points to pid now */
|
---|
| 441 | process = NULL;
|
---|
| 442 | get_func_name:
|
---|
| 443 | p = strchr(p, ' ');
|
---|
| 444 | if (!p)
|
---|
| 445 | continue;
|
---|
| 446 | *p++ = '\0';
|
---|
| 447 | p = skip_whitespace(p);
|
---|
| 448 | if (process == NULL) {
|
---|
| 449 | process = p;
|
---|
| 450 | goto get_func_name;
|
---|
| 451 | }
|
---|
| 452 | func = p;
|
---|
| 453 |
|
---|
| 454 | //if (strcmp(process, "swapper") == 0
|
---|
| 455 | // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0
|
---|
| 456 | //) {
|
---|
| 457 | // process = "[kernel scheduler]";
|
---|
| 458 | // func = "Load balancing tick";
|
---|
| 459 | //}
|
---|
| 460 |
|
---|
[3621] | 461 | if (is_prefixed_with(func, "tick_nohz_"))
|
---|
[2725] | 462 | continue;
|
---|
[3621] | 463 | if (is_prefixed_with(func, "tick_setup_sched_timer"))
|
---|
[2725] | 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 |
|
---|
[3621] | 473 | chomp(p);
|
---|
[2725] | 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,
|
---|
[3232] | 496 | unsigned int *edx)
|
---|
[2725] | 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 |
|
---|
[3621] | 594 | printf("Your %s the following C-states: ", "CPU supports");
|
---|
[2725] | 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 */
|
---|
[3621] | 605 | printf("Your %s the following C-states: ", "BIOS reports");
|
---|
[2725] | 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';*/
|
---|
[3621] | 641 | smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY")[0] = '\0';
|
---|
[2725] | 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"
|
---|
[3232] | 652 | " enable the timer_stats module");
|
---|
[2725] | 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"
|
---|
[3621] | 677 | //usage: "Analyze power consumption on Intel-based laptops"
|
---|
[2725] | 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 |
|
---|
[3621] | 707 | puts("Collecting data for "DEFAULT_SLEEP_STR" seconds");
|
---|
[2725] | 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 | }
|
---|