[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/app/busybox/src/procps/powertop.c b/ap/app/busybox/src/procps/powertop.c
new file mode 100644
index 0000000..71988a2
--- /dev/null
+++ b/ap/app/busybox/src/procps/powertop.c
@@ -0,0 +1,857 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * A mini 'powertop' utility:
+ * Analyze power consumption on Intel-based laptops.
+ * Based on powertop 1.11.
+ *
+ * Copyright (C) 2010 Marek Polacek <mmpolacek@gmail.com>
+ *
+ * Licensed under GPLv2, see file LICENSE in this source tree.
+ */
+
+//applet:IF_POWERTOP(APPLET(powertop, BB_DIR_USR_SBIN, BB_SUID_DROP))
+
+//kbuild:lib-$(CONFIG_POWERTOP) += powertop.o
+
+//config:config POWERTOP
+//config: bool "powertop"
+//config: default y
+//config: help
+//config: Analyze power consumption on Intel-based laptops
+
+// XXX This should be configurable
+#define ENABLE_FEATURE_POWERTOP_PROCIRQ 1
+
+#include "libbb.h"
+
+
+//#define debug(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__)
+#define debug(fmt, ...) ((void)0)
+
+
+#define BLOATY_HPET_IRQ_NUM_DETECTION 0
+#define MAX_CSTATE_COUNT 8
+#define IRQCOUNT 40
+
+
+#define DEFAULT_SLEEP 10
+#define DEFAULT_SLEEP_STR "10"
+
+/* Frequency of the ACPI timer */
+#define FREQ_ACPI 3579.545
+#define FREQ_ACPI_1000 3579545
+
+/* Max filename length of entry in /sys/devices subsystem */
+#define BIG_SYSNAME_LEN 16
+
+typedef unsigned long long ullong;
+
+struct line {
+ char *string;
+ int count;
+ /*int disk_count;*/
+};
+
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ
+struct irqdata {
+ smallint active;
+ int number;
+ ullong count;
+ char irq_desc[32];
+};
+#endif
+
+struct globals {
+ struct line *lines; /* the most often used member */
+ int lines_cnt;
+ int lines_cumulative_count;
+ int maxcstate;
+ unsigned total_cpus;
+ smallint cant_enable_timer_stats;
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ
+# if BLOATY_HPET_IRQ_NUM_DETECTION
+ smallint scanned_timer_list;
+ int percpu_hpet_start;
+ int percpu_hpet_end;
+# endif
+ int interrupt_0;
+ int total_interrupt;
+ struct irqdata interrupts[IRQCOUNT];
+#endif
+ ullong start_usage[MAX_CSTATE_COUNT];
+ ullong last_usage[MAX_CSTATE_COUNT];
+ ullong start_duration[MAX_CSTATE_COUNT];
+ ullong last_duration[MAX_CSTATE_COUNT];
+#if ENABLE_FEATURE_USE_TERMIOS
+ struct termios init_settings;
+#endif
+};
+#define G (*ptr_to_globals)
+#define INIT_G() do { \
+ SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
+} while (0)
+
+#if ENABLE_FEATURE_USE_TERMIOS
+static void reset_term(void)
+{
+ tcsetattr_stdin_TCSANOW(&G.init_settings);
+}
+
+static void sig_handler(int signo UNUSED_PARAM)
+{
+ reset_term();
+ _exit(EXIT_FAILURE);
+}
+#endif
+
+static int write_str_to_file(const char *fname, const char *str)
+{
+ FILE *fp = fopen_for_write(fname);
+ if (!fp)
+ return 1;
+ fputs(str, fp);
+ fclose(fp);
+ return 0;
+}
+
+/* Make it more readable */
+#define start_timer() write_str_to_file("/proc/timer_stats", "1\n")
+#define stop_timer() write_str_to_file("/proc/timer_stats", "0\n")
+
+static NOINLINE void clear_lines(void)
+{
+ int i;
+ if (G.lines) {
+ for (i = 0; i < G.lines_cnt; i++)
+ free(G.lines[i].string);
+ free(G.lines);
+ G.lines_cnt = 0;
+ G.lines = NULL;
+ }
+}
+
+static void update_lines_cumulative_count(void)
+{
+ int i;
+ for (i = 0; i < G.lines_cnt; i++)
+ G.lines_cumulative_count += G.lines[i].count;
+}
+
+static int line_compare(const void *p1, const void *p2)
+{
+ const struct line *a = p1;
+ const struct line *b = p2;
+ return (b->count /*+ 50 * b->disk_count*/) - (a->count /*+ 50 * a->disk_count*/);
+}
+
+static void sort_lines(void)
+{
+ qsort(G.lines, G.lines_cnt, sizeof(G.lines[0]), line_compare);
+}
+
+/* Save C-state usage and duration. Also update maxcstate. */
+static void read_cstate_counts(ullong *usage, ullong *duration)
+{
+ DIR *dir;
+ struct dirent *d;
+
+ dir = opendir("/proc/acpi/processor");
+ if (!dir)
+ return;
+
+ while ((d = readdir(dir)) != NULL) {
+ FILE *fp;
+ char buf[192];
+ int level;
+ int len;
+
+ len = strlen(d->d_name); /* "CPUnn" */
+ if (len < 3 || len > BIG_SYSNAME_LEN)
+ continue;
+
+ sprintf(buf, "%s/%s/power", "/proc/acpi/processor", d->d_name);
+ fp = fopen_for_read(buf);
+ if (!fp)
+ continue;
+
+// Example file contents:
+// active state: C0
+// max_cstate: C8
+// maximum allowed latency: 2000000000 usec
+// states:
+// C1: type[C1] promotion[--] demotion[--] latency[001] usage[00006173] duration[00000000000000000000]
+// C2: type[C2] promotion[--] demotion[--] latency[001] usage[00085191] duration[00000000000083024907]
+// C3: type[C3] promotion[--] demotion[--] latency[017] usage[01017622] duration[00000000017921327182]
+ level = 0;
+ while (fgets(buf, sizeof(buf), fp)) {
+ char *p = strstr(buf, "age[");
+ if (!p)
+ continue;
+ p += 4;
+ usage[level] += bb_strtoull(p, NULL, 10) + 1;
+ p = strstr(buf, "ation[");
+ if (!p)
+ continue;
+ p += 6;
+ duration[level] += bb_strtoull(p, NULL, 10);
+
+ if (level >= MAX_CSTATE_COUNT-1)
+ break;
+ level++;
+ if (level > G.maxcstate) /* update maxcstate */
+ G.maxcstate = level;
+ }
+ fclose(fp);
+ }
+ closedir(dir);
+}
+
+/* Add line and/or update count */
+static void save_line(const char *string, int count)
+{
+ int i;
+ for (i = 0; i < G.lines_cnt; i++) {
+ if (strcmp(string, G.lines[i].string) == 0) {
+ /* It's already there, only update count */
+ G.lines[i].count += count;
+ return;
+ }
+ }
+
+ /* Add new line */
+ G.lines = xrealloc_vector(G.lines, 4, G.lines_cnt);
+ G.lines[G.lines_cnt].string = xstrdup(string);
+ G.lines[G.lines_cnt].count = count;
+ /*G.lines[G.lines_cnt].disk_count = 0;*/
+ G.lines_cnt++;
+}
+
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ
+static int is_hpet_irq(const char *name)
+{
+ char *p;
+# if BLOATY_HPET_IRQ_NUM_DETECTION
+ long hpet_chan;
+
+ /* Learn the range of existing hpet timers. This is done once */
+ if (!G.scanned_timer_list) {
+ FILE *fp;
+ char buf[80];
+
+ G.scanned_timer_list = true;
+ fp = fopen_for_read("/proc/timer_list");
+ if (!fp)
+ return 0;
+
+ while (fgets(buf, sizeof(buf), fp)) {
+ p = strstr(buf, "Clock Event Device: hpet");
+ if (!p)
+ continue;
+ p += sizeof("Clock Event Device: hpet")-1;
+ if (!isdigit(*p))
+ continue;
+ hpet_chan = xatoi_positive(p);
+ if (hpet_chan < G.percpu_hpet_start)
+ G.percpu_hpet_start = hpet_chan;
+ if (hpet_chan > G.percpu_hpet_end)
+ G.percpu_hpet_end = hpet_chan;
+ }
+ fclose(fp);
+ }
+# endif
+//TODO: optimize
+ p = strstr(name, "hpet");
+ if (!p)
+ return 0;
+ p += 4;
+ if (!isdigit(*p))
+ return 0;
+# if BLOATY_HPET_IRQ_NUM_DETECTION
+ hpet_chan = xatoi_positive(p);
+ if (hpet_chan < G.percpu_hpet_start || hpet_chan > G.percpu_hpet_end)
+ return 0;
+# endif
+ return 1;
+}
+
+/* Save new IRQ count, return delta from old one */
+static int save_irq_count(int irq, ullong count)
+{
+ int unused = IRQCOUNT;
+ int i;
+ for (i = 0; i < IRQCOUNT; i++) {
+ if (G.interrupts[i].active && G.interrupts[i].number == irq) {
+ ullong old = G.interrupts[i].count;
+ G.interrupts[i].count = count;
+ return count - old;
+ }
+ if (!G.interrupts[i].active && unused > i)
+ unused = i;
+ }
+ if (unused < IRQCOUNT) {
+ G.interrupts[unused].active = 1;
+ G.interrupts[unused].count = count;
+ G.interrupts[unused].number = irq;
+ }
+ return count;
+}
+
+/* Read /proc/interrupts, save IRQ counts and IRQ description */
+static void process_irq_counts(void)
+{
+ FILE *fp;
+ char buf[128];
+
+ /* Reset values */
+ G.interrupt_0 = 0;
+ G.total_interrupt = 0;
+
+ fp = xfopen_for_read("/proc/interrupts");
+ while (fgets(buf, sizeof(buf), fp)) {
+ char irq_desc[sizeof(" <kernel IPI> : ") + sizeof(buf)];
+ char *p;
+ const char *name;
+ int nr;
+ ullong count;
+ ullong delta;
+
+ p = strchr(buf, ':');
+ if (!p)
+ continue;
+ /* 0: 143646045 153901007 IO-APIC-edge timer
+ * ^
+ */
+ *p = '\0';
+ /* Deal with non-maskable interrupts -- make up fake numbers */
+ nr = index_in_strings("NMI\0RES\0CAL\0TLB\0TRM\0THR\0SPU\0", buf);
+ if (nr >= 0) {
+ nr += 20000;
+ } else {
+ /* bb_strtou doesn't eat leading spaces, using strtoul */
+ errno = 0;
+ nr = strtoul(buf, NULL, 10);
+ if (errno)
+ continue;
+ }
+ p++;
+ /* 0: 143646045 153901007 IO-APIC-edge timer
+ * ^
+ */
+ /* Sum counts for this IRQ */
+ count = 0;
+ while (1) {
+ char *tmp;
+ p = skip_whitespace(p);
+ if (!isdigit(*p))
+ break;
+ count += bb_strtoull(p, &tmp, 10);
+ p = tmp;
+ }
+ /* 0: 143646045 153901007 IO-APIC-edge timer
+ * NMI: 1 2 Non-maskable interrupts
+ * ^
+ */
+ if (nr < 20000) {
+ /* Skip to the interrupt name, e.g. 'timer' */
+ p = strchr(p, ' ');
+ if (!p)
+ continue;
+ p = skip_whitespace(p);
+ }
+
+ name = p;
+ strchrnul(name, '\n')[0] = '\0';
+ /* Save description of the interrupt */
+ if (nr >= 20000)
+ sprintf(irq_desc, " <kernel IPI> : %s", name);
+ else
+ sprintf(irq_desc, " <interrupt> : %s", name);
+
+ delta = save_irq_count(nr, count);
+
+ /* Skip per CPU timer interrupts */
+ if (is_hpet_irq(name))
+ continue;
+
+ if (nr != 0 && delta != 0)
+ save_line(irq_desc, delta);
+
+ if (nr == 0)
+ G.interrupt_0 = delta;
+ else
+ G.total_interrupt += delta;
+ }
+
+ fclose(fp);
+}
+#else /* !ENABLE_FEATURE_POWERTOP_PROCIRQ */
+# define process_irq_counts() ((void)0)
+#endif
+
+static NOINLINE int process_timer_stats(void)
+{
+ char buf[128];
+ char line[15 + 3 + 128];
+ int n;
+ FILE *fp;
+
+ buf[0] = '\0';
+
+ n = 0;
+ fp = NULL;
+ if (!G.cant_enable_timer_stats)
+ fp = fopen_for_read("/proc/timer_stats");
+ if (fp) {
+// Example file contents:
+// Timer Stats Version: v0.2
+// Sample period: 1.329 s
+// 76, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
+// 88, 0 swapper hrtimer_start_range_ns (tick_sched_timer)
+// 24, 3787 firefox hrtimer_start_range_ns (hrtimer_wakeup)
+// 46D, 1136 kondemand/1 do_dbs_timer (delayed_work_timer_fn)
+// ...
+// 1, 1656 Xorg hrtimer_start_range_ns (hrtimer_wakeup)
+// 1, 2159 udisks-daemon hrtimer_start_range_ns (hrtimer_wakeup)
+// 331 total events, 249.059 events/sec
+ while (fgets(buf, sizeof(buf), fp)) {
+ const char *count, *process, *func;
+ char *p;
+ int idx;
+ unsigned cnt;
+
+ count = skip_whitespace(buf);
+ p = strchr(count, ',');
+ if (!p)
+ continue;
+ *p++ = '\0';
+ cnt = bb_strtou(count, NULL, 10);
+ if (strcmp(skip_non_whitespace(count), " total events") == 0) {
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ
+ n = cnt / G.total_cpus;
+ if (n > 0 && n < G.interrupt_0) {
+ sprintf(line, " <interrupt> : %s", "extra timer interrupt");
+ save_line(line, G.interrupt_0 - n);
+ }
+#endif
+ break;
+ }
+ if (strchr(count, 'D'))
+ continue; /* deferred */
+ p = skip_whitespace(p); /* points to pid now */
+ process = NULL;
+ get_func_name:
+ p = strchr(p, ' ');
+ if (!p)
+ continue;
+ *p++ = '\0';
+ p = skip_whitespace(p);
+ if (process == NULL) {
+ process = p;
+ goto get_func_name;
+ }
+ func = p;
+
+ //if (strcmp(process, "swapper") == 0
+ // && strcmp(func, "hrtimer_start_range_ns (tick_sched_timer)\n") == 0
+ //) {
+ // process = "[kernel scheduler]";
+ // func = "Load balancing tick";
+ //}
+
+ if (strncmp(func, "tick_nohz_", 10) == 0)
+ continue;
+ if (strncmp(func, "tick_setup_sched_timer", 20) == 0)
+ continue;
+ //if (strcmp(process, "powertop") == 0)
+ // continue;
+
+ idx = index_in_strings("insmod\0modprobe\0swapper\0", process);
+ if (idx != -1) {
+ process = idx < 2 ? "[kernel module]" : "<kernel core>";
+ }
+
+ strchrnul(p, '\n')[0] = '\0';
+
+ // 46D\01136\0kondemand/1\0do_dbs_timer (delayed_work_timer_fn)
+ // ^ ^ ^
+ // count process func
+
+ //if (strchr(process, '['))
+ sprintf(line, "%15.15s : %s", process, func);
+ //else
+ // sprintf(line, "%s", process);
+ save_line(line, cnt);
+ }
+ fclose(fp);
+ }
+
+ return n;
+}
+
+#ifdef __i386__
+/*
+ * Get information about CPU using CPUID opcode.
+ */
+static void cpuid(unsigned int *eax, unsigned int *ebx, unsigned int *ecx,
+ unsigned int *edx)
+{
+ /* EAX value specifies what information to return */
+ __asm__(
+ " pushl %%ebx\n" /* Save EBX */
+ " cpuid\n"
+ " movl %%ebx, %1\n" /* Save content of EBX */
+ " popl %%ebx\n" /* Restore EBX */
+ : "=a"(*eax), /* Output */
+ "=r"(*ebx),
+ "=c"(*ecx),
+ "=d"(*edx)
+ : "0"(*eax), /* Input */
+ "1"(*ebx),
+ "2"(*ecx),
+ "3"(*edx)
+ /* No clobbered registers */
+ );
+}
+#endif
+
+#ifdef __i386__
+static NOINLINE void print_intel_cstates(void)
+{
+ int bios_table[8] = { 0 };
+ int nbios = 0;
+ DIR *cpudir;
+ struct dirent *d;
+ int i;
+ unsigned eax, ebx, ecx, edx;
+
+ cpudir = opendir("/sys/devices/system/cpu");
+ if (!cpudir)
+ return;
+
+ /* Loop over cpuN entries */
+ while ((d = readdir(cpudir)) != NULL) {
+ DIR *dir;
+ int len;
+ char fname[sizeof("/sys/devices/system/cpu//cpuidle//desc") + 2*BIG_SYSNAME_LEN];
+
+ len = strlen(d->d_name);
+ if (len < 3 || len > BIG_SYSNAME_LEN)
+ continue;
+
+ if (!isdigit(d->d_name[3]))
+ continue;
+
+ len = sprintf(fname, "%s/%s/cpuidle", "/sys/devices/system/cpu", d->d_name);
+ dir = opendir(fname);
+ if (!dir)
+ continue;
+
+ /*
+ * Every C-state has its own stateN directory, that
+ * contains a 'time' and a 'usage' file.
+ */
+ while ((d = readdir(dir)) != NULL) {
+ FILE *fp;
+ char buf[64];
+ int n;
+
+ n = strlen(d->d_name);
+ if (n < 3 || n > BIG_SYSNAME_LEN)
+ continue;
+
+ sprintf(fname + len, "/%s/desc", d->d_name);
+ fp = fopen_for_read(fname);
+ if (fp) {
+ char *p = fgets(buf, sizeof(buf), fp);
+ fclose(fp);
+ if (!p)
+ break;
+ p = strstr(p, "MWAIT ");
+ if (p) {
+ int pos;
+ p += sizeof("MWAIT ") - 1;
+ pos = (bb_strtoull(p, NULL, 16) >> 4) + 1;
+ if (pos >= ARRAY_SIZE(bios_table))
+ continue;
+ bios_table[pos]++;
+ nbios++;
+ }
+ }
+ }
+ closedir(dir);
+ }
+ closedir(cpudir);
+
+ if (!nbios)
+ return;
+
+ eax = 5;
+ ebx = ecx = edx = 0;
+ cpuid(&eax, &ebx, &ecx, &edx);
+ if (!edx || !(ecx & 1))
+ return;
+
+ printf("Your CPU supports the following C-states: ");
+ i = 0;
+ while (edx) {
+ if (edx & 7)
+ printf("C%u ", i);
+ edx >>= 4;
+ i++;
+ }
+ bb_putchar('\n');
+
+ /* Print BIOS C-States */
+ printf("Your BIOS reports the following C-states: ");
+ for (i = 0; i < ARRAY_SIZE(bios_table); i++)
+ if (bios_table[i])
+ printf("C%u ", i);
+
+ bb_putchar('\n');
+}
+#else
+# define print_intel_cstates() ((void)0)
+#endif
+
+static void show_timerstats(void)
+{
+ unsigned lines;
+
+ /* Get terminal height */
+ get_terminal_width_height(STDOUT_FILENO, NULL, &lines);
+
+ /* We don't have whole terminal just for timerstats */
+ lines -= 12;
+
+ if (!G.cant_enable_timer_stats) {
+ int i, n = 0;
+ char strbuf6[6];
+
+ strbuf6[5] = '\0';
+ puts("\nTop causes for wakeups:");
+ for (i = 0; i < G.lines_cnt; i++) {
+ if ((G.lines[i].count > 0 /*|| G.lines[i].disk_count > 0*/)
+ && n++ < lines
+ ) {
+ /* NB: upstream powertop prints "(wakeups/sec)",
+ * we print just "(wakeup counts)".
+ */
+ /*char c = ' ';
+ if (G.lines[i].disk_count)
+ c = 'D';*/
+ smart_ulltoa5(G.lines[i].count, strbuf6, " KMGTPEZY");
+ printf(/*" %5.1f%% (%s)%c %s\n"*/
+ " %5.1f%% (%s) %s\n",
+ G.lines[i].count * 100.0 / G.lines_cumulative_count,
+ strbuf6, /*c,*/
+ G.lines[i].string);
+ }
+ }
+ } else {
+ bb_putchar('\n');
+ bb_error_msg("no stats available; run as root or"
+ " enable the timer_stats module");
+ }
+}
+
+// Example display from powertop version 1.11
+// Cn Avg residency P-states (frequencies)
+// C0 (cpu running) ( 0.5%) 2.00 Ghz 0.0%
+// polling 0.0ms ( 0.0%) 1.67 Ghz 0.0%
+// C1 mwait 0.0ms ( 0.0%) 1333 Mhz 0.1%
+// C2 mwait 0.1ms ( 0.1%) 1000 Mhz 99.9%
+// C3 mwait 12.1ms (99.4%)
+//
+// Wakeups-from-idle per second : 93.6 interval: 15.0s
+// no ACPI power usage estimate available
+//
+// Top causes for wakeups:
+// 32.4% ( 26.7) <interrupt> : extra timer interrupt
+// 29.0% ( 23.9) <kernel core> : hrtimer_start_range_ns (tick_sched_timer)
+// 9.0% ( 7.5) <kernel core> : hrtimer_start (tick_sched_timer)
+// 6.5% ( 5.3) <interrupt> : ata_piix
+// 5.0% ( 4.1) inetd : hrtimer_start_range_ns (hrtimer_wakeup)
+
+//usage:#define powertop_trivial_usage
+//usage: ""
+//usage:#define powertop_full_usage "\n\n"
+//usage: "Analyze power consumption on Intel-based laptops\n"
+
+int powertop_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int powertop_main(int UNUSED_PARAM argc, char UNUSED_PARAM **argv)
+{
+ ullong cur_usage[MAX_CSTATE_COUNT];
+ ullong cur_duration[MAX_CSTATE_COUNT];
+ char cstate_lines[MAX_CSTATE_COUNT + 2][64];
+#if ENABLE_FEATURE_USE_TERMIOS
+ struct termios new_settings;
+ struct pollfd pfd[1];
+
+ pfd[0].fd = 0;
+ pfd[0].events = POLLIN;
+#endif
+
+ INIT_G();
+
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ && BLOATY_HPET_IRQ_NUM_DETECTION
+ G.percpu_hpet_start = INT_MAX;
+ G.percpu_hpet_end = INT_MIN;
+#endif
+
+ /* Print warning when we don't have superuser privileges */
+ if (geteuid() != 0)
+ bb_error_msg("run as root to collect enough information");
+
+ /* Get number of CPUs */
+ G.total_cpus = get_cpu_count();
+
+ printf("Collecting data for "DEFAULT_SLEEP_STR" seconds\n");
+
+#if ENABLE_FEATURE_USE_TERMIOS
+ tcgetattr(0, (void *)&G.init_settings);
+ memcpy(&new_settings, &G.init_settings, sizeof(new_settings));
+ /* Turn on unbuffered input, turn off echoing */
+ new_settings.c_lflag &= ~(ISIG | ICANON | ECHO | ECHONL);
+ /* So we don't forget to reset term settings */
+ atexit(reset_term);
+ bb_signals(BB_FATAL_SIGS, sig_handler);
+ tcsetattr_stdin_TCSANOW(&new_settings);
+#endif
+
+ /* Collect initial data */
+ process_irq_counts();
+
+ /* Read initial usage and duration */
+ read_cstate_counts(G.start_usage, G.start_duration);
+
+ /* Copy them to "last" */
+ memcpy(G.last_usage, G.start_usage, sizeof(G.last_usage));
+ memcpy(G.last_duration, G.start_duration, sizeof(G.last_duration));
+
+ /* Display C-states */
+ print_intel_cstates();
+
+ G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
+
+ /* The main loop */
+ for (;;) {
+ //double maxsleep = 0.0;
+ ullong totalticks, totalevents;
+ int i;
+
+ G.cant_enable_timer_stats |= start_timer(); /* 1 on error */
+#if !ENABLE_FEATURE_USE_TERMIOS
+ sleep(DEFAULT_SLEEP);
+#else
+ if (safe_poll(pfd, 1, DEFAULT_SLEEP * 1000) > 0) {
+ unsigned char c;
+ if (safe_read(STDIN_FILENO, &c, 1) != 1)
+ break; /* EOF/error */
+ if (c == G.init_settings.c_cc[VINTR])
+ break; /* ^C */
+ if ((c | 0x20) == 'q')
+ break;
+ }
+#endif
+ G.cant_enable_timer_stats |= stop_timer(); /* 1 on error */
+
+ clear_lines();
+ process_irq_counts();
+
+ /* Clear the stats */
+ memset(cur_duration, 0, sizeof(cur_duration));
+ memset(cur_usage, 0, sizeof(cur_usage));
+
+ /* Read them */
+ read_cstate_counts(cur_usage, cur_duration);
+
+ /* Count totalticks and totalevents */
+ totalticks = totalevents = 0;
+ for (i = 0; i < MAX_CSTATE_COUNT; i++) {
+ if (cur_usage[i] != 0) {
+ totalticks += cur_duration[i] - G.last_duration[i];
+ totalevents += cur_usage[i] - G.last_usage[i];
+ }
+ }
+
+ /* Clear the screen */
+ printf("\033[H\033[J");
+
+ /* Clear C-state lines */
+ memset(&cstate_lines, 0, sizeof(cstate_lines));
+
+ if (totalevents == 0 && G.maxcstate <= 1) {
+ /* This should not happen */
+ strcpy(cstate_lines[0], "C-state information is not available\n");
+ } else {
+ double percentage;
+ unsigned newticks;
+
+ newticks = G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000 - totalticks;
+ /* Handle rounding errors: do not display negative values */
+ if ((int)newticks < 0)
+ newticks = 0;
+
+ sprintf(cstate_lines[0], "Cn\t\t Avg residency\n");
+ percentage = newticks * 100.0 / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
+ sprintf(cstate_lines[1], "C0 (cpu running) (%4.1f%%)\n", percentage);
+
+ /* Compute values for individual C-states */
+ for (i = 0; i < MAX_CSTATE_COUNT; i++) {
+ if (cur_usage[i] != 0) {
+ double slept;
+ slept = (cur_duration[i] - G.last_duration[i])
+ / (cur_usage[i] - G.last_usage[i] + 0.1) / FREQ_ACPI;
+ percentage = (cur_duration[i] - G.last_duration[i]) * 100
+ / (G.total_cpus * DEFAULT_SLEEP * FREQ_ACPI_1000);
+ sprintf(cstate_lines[i + 2], "C%u\t\t%5.1fms (%4.1f%%)\n",
+ i + 1, slept, percentage);
+ //if (maxsleep < slept)
+ // maxsleep = slept;
+ }
+ }
+ }
+
+ for (i = 0; i < MAX_CSTATE_COUNT + 2; i++)
+ if (cstate_lines[i][0])
+ fputs(cstate_lines[i], stdout);
+
+ i = process_timer_stats();
+#if ENABLE_FEATURE_POWERTOP_PROCIRQ
+ if (totalevents == 0) {
+ /* No C-state info available, use timerstats */
+ totalevents = i * G.total_cpus + G.total_interrupt;
+ if (i < 0)
+ totalevents += G.interrupt_0 - i;
+ }
+#endif
+ /* Upstream powertop prints wakeups per sec per CPU,
+ * we print just raw wakeup counts.
+ */
+//TODO: show real seconds (think about manual refresh)
+ printf("\nWakeups-from-idle in %u seconds: %llu\n",
+ DEFAULT_SLEEP,
+ totalevents
+ );
+
+ update_lines_cumulative_count();
+ sort_lines();
+ show_timerstats();
+ fflush(stdout);
+
+ /* Clear the stats */
+ memset(cur_duration, 0, sizeof(cur_duration));
+ memset(cur_usage, 0, sizeof(cur_usage));
+
+ /* Get new values */
+ read_cstate_counts(cur_usage, cur_duration);
+
+ /* Save them */
+ memcpy(G.last_usage, cur_usage, sizeof(G.last_usage));
+ memcpy(G.last_duration, cur_duration, sizeof(G.last_duration));
+ } /* for (;;) */
+
+ bb_putchar('\n');
+
+ return EXIT_SUCCESS;
+}