Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 1 | /* |
| 2 | * kernel/time/timer_list.c |
| 3 | * |
| 4 | * List pending timers |
| 5 | * |
| 6 | * Copyright(C) 2006, Red Hat, Inc., Ingo Molnar |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License version 2 as |
| 10 | * published by the Free Software Foundation. |
| 11 | */ |
| 12 | |
| 13 | #include <linux/proc_fs.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/spinlock.h> |
| 16 | #include <linux/sched.h> |
| 17 | #include <linux/seq_file.h> |
| 18 | #include <linux/kallsyms.h> |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 19 | |
| 20 | #include <asm/uaccess.h> |
| 21 | |
Thomas Gleixner | c1797ba | 2015-03-25 13:07:37 +0100 | [diff] [blame] | 22 | #include "tick-internal.h" |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 23 | |
| 24 | struct timer_list_iter { |
| 25 | int cpu; |
| 26 | bool second_pass; |
| 27 | u64 now; |
| 28 | }; |
| 29 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 30 | typedef void (*print_fn_t)(struct seq_file *m, unsigned int *classes); |
| 31 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 32 | /* |
| 33 | * This allows printing both to /proc/timer_list and |
| 34 | * to the console (on SysRq-Q): |
| 35 | */ |
Joe Perches | 7de4e74 | 2015-04-17 11:39:18 -0700 | [diff] [blame] | 36 | __printf(2, 3) |
| 37 | static void SEQ_printf(struct seq_file *m, const char *fmt, ...) |
| 38 | { |
| 39 | va_list args; |
| 40 | |
| 41 | va_start(args, fmt); |
| 42 | |
| 43 | if (m) |
| 44 | seq_vprintf(m, fmt, args); |
| 45 | else |
| 46 | vprintk(fmt, args); |
| 47 | |
| 48 | va_end(args); |
| 49 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 50 | |
| 51 | static void print_name_offset(struct seq_file *m, void *sym) |
| 52 | { |
Tejun Heo | 9281ace | 2007-07-17 04:03:51 -0700 | [diff] [blame] | 53 | char symname[KSYM_NAME_LEN]; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 54 | |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 55 | if (lookup_symbol_name((unsigned long)sym, symname) < 0) |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 56 | SEQ_printf(m, "<%pK>", sym); |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 57 | else |
| 58 | SEQ_printf(m, "%s", symname); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 59 | } |
| 60 | |
| 61 | static void |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 62 | print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer, |
| 63 | int idx, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 64 | { |
| 65 | #ifdef CONFIG_TIMER_STATS |
| 66 | char tmp[TASK_COMM_LEN + 1]; |
| 67 | #endif |
| 68 | SEQ_printf(m, " #%d: ", idx); |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 69 | print_name_offset(m, taddr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 70 | SEQ_printf(m, ", "); |
| 71 | print_name_offset(m, timer->function); |
Thomas Gleixner | 203cbf77 | 2016-01-14 16:54:46 +0000 | [diff] [blame] | 72 | SEQ_printf(m, ", S:%02x", timer->state); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 73 | #ifdef CONFIG_TIMER_STATS |
| 74 | SEQ_printf(m, ", "); |
| 75 | print_name_offset(m, timer->start_site); |
| 76 | memcpy(tmp, timer->start_comm, TASK_COMM_LEN); |
| 77 | tmp[TASK_COMM_LEN] = 0; |
| 78 | SEQ_printf(m, ", %s/%d", tmp, timer->start_pid); |
| 79 | #endif |
| 80 | SEQ_printf(m, "\n"); |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 81 | SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n", |
| 82 | (unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 83 | (unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)), |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 84 | (long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 85 | (long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 86 | } |
| 87 | |
| 88 | static void |
| 89 | print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base, |
| 90 | u64 now) |
| 91 | { |
| 92 | struct hrtimer *timer, tmp; |
| 93 | unsigned long next = 0, i; |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 94 | struct timerqueue_node *curr; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 95 | unsigned long flags; |
| 96 | |
| 97 | next_one: |
| 98 | i = 0; |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 99 | raw_spin_lock_irqsave(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 100 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 101 | curr = timerqueue_getnext(&base->active); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 102 | /* |
| 103 | * Crude but we have to do this O(N*N) thing, because |
| 104 | * we have to unlock the base when printing: |
| 105 | */ |
| 106 | while (curr && i < next) { |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 107 | curr = timerqueue_iterate_next(curr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 108 | i++; |
| 109 | } |
| 110 | |
| 111 | if (curr) { |
| 112 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 113 | timer = container_of(curr, struct hrtimer, node); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 114 | tmp = *timer; |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 115 | raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 116 | |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 117 | print_timer(m, timer, &tmp, i, now); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 118 | next++; |
| 119 | goto next_one; |
| 120 | } |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 121 | raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 122 | } |
| 123 | |
| 124 | static void |
| 125 | print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now) |
| 126 | { |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 127 | SEQ_printf(m, " .base: %pK\n", base); |
Thomas Gleixner | 398ca17 | 2015-04-14 21:08:27 +0000 | [diff] [blame] | 128 | SEQ_printf(m, " .index: %d\n", base->index); |
| 129 | |
| 130 | SEQ_printf(m, " .resolution: %u nsecs\n", (unsigned) hrtimer_resolution); |
| 131 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 132 | SEQ_printf(m, " .get_time: "); |
| 133 | print_name_offset(m, base->get_time); |
| 134 | SEQ_printf(m, "\n"); |
| 135 | #ifdef CONFIG_HIGH_RES_TIMERS |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 136 | SEQ_printf(m, " .offset: %Lu nsecs\n", |
| 137 | (unsigned long long) ktime_to_ns(base->offset)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 138 | #endif |
| 139 | SEQ_printf(m, "active timers:\n"); |
John Stultz | 38bf985 | 2015-05-27 16:44:48 -0700 | [diff] [blame] | 140 | print_active_timers(m, base, now + ktime_to_ns(base->offset)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static void print_cpu(struct seq_file *m, int cpu, u64 now) |
| 144 | { |
| 145 | struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu); |
| 146 | int i; |
| 147 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 148 | SEQ_printf(m, "cpu: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 149 | for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) { |
| 150 | SEQ_printf(m, " clock %d:\n", i); |
| 151 | print_base(m, cpu_base->clock_base + i, now); |
| 152 | } |
| 153 | #define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 154 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 155 | (unsigned long long)(cpu_base->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 156 | #define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 157 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 158 | (unsigned long long)(ktime_to_ns(cpu_base->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 159 | |
| 160 | #ifdef CONFIG_HIGH_RES_TIMERS |
| 161 | P_ns(expires_next); |
| 162 | P(hres_active); |
| 163 | P(nr_events); |
Thomas Gleixner | 41d2e49 | 2009-11-13 17:05:44 +0100 | [diff] [blame] | 164 | P(nr_retries); |
| 165 | P(nr_hangs); |
Thomas Gleixner | a6ffebc | 2015-04-14 21:08:34 +0000 | [diff] [blame] | 166 | P(max_hang_time); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 167 | #endif |
| 168 | #undef P |
| 169 | #undef P_ns |
| 170 | |
| 171 | #ifdef CONFIG_TICK_ONESHOT |
| 172 | # define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 173 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 174 | (unsigned long long)(ts->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 175 | # define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 176 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 177 | (unsigned long long)(ktime_to_ns(ts->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 178 | { |
| 179 | struct tick_sched *ts = tick_get_tick_sched(cpu); |
| 180 | P(nohz_mode); |
Frederic Weisbecker | f5d411c | 2011-07-31 17:44:12 +0200 | [diff] [blame] | 181 | P_ns(last_tick); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 182 | P(tick_stopped); |
| 183 | P(idle_jiffies); |
| 184 | P(idle_calls); |
| 185 | P(idle_sleeps); |
| 186 | P_ns(idle_entrytime); |
Thomas Gleixner | 5df7fa1 | 2008-02-01 17:45:14 +0100 | [diff] [blame] | 187 | P_ns(idle_waketime); |
| 188 | P_ns(idle_exittime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 189 | P_ns(idle_sleeptime); |
Arjan van de Ven | 0224cf4 | 2010-05-09 08:25:23 -0700 | [diff] [blame] | 190 | P_ns(iowait_sleeptime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 191 | P(last_jiffies); |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 192 | P(next_timer); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 193 | P_ns(idle_expires); |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 194 | SEQ_printf(m, "jiffies: %Lu\n", |
| 195 | (unsigned long long)jiffies); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 196 | } |
| 197 | #endif |
| 198 | |
| 199 | #undef P |
| 200 | #undef P_ns |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 201 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 205 | static void |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 206 | print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 207 | { |
| 208 | struct clock_event_device *dev = td->evtdev; |
| 209 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 210 | SEQ_printf(m, "Tick Device: mode: %d\n", td->mode); |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 211 | if (cpu < 0) |
| 212 | SEQ_printf(m, "Broadcast device\n"); |
| 213 | else |
| 214 | SEQ_printf(m, "Per CPU device: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 215 | |
| 216 | SEQ_printf(m, "Clock Event Device: "); |
| 217 | if (!dev) { |
| 218 | SEQ_printf(m, "<NULL>\n"); |
| 219 | return; |
| 220 | } |
| 221 | SEQ_printf(m, "%s\n", dev->name); |
Jon Hunter | 97813f2 | 2009-08-18 12:45:11 -0500 | [diff] [blame] | 222 | SEQ_printf(m, " max_delta_ns: %llu\n", |
| 223 | (unsigned long long) dev->max_delta_ns); |
| 224 | SEQ_printf(m, " min_delta_ns: %llu\n", |
| 225 | (unsigned long long) dev->min_delta_ns); |
Thomas Gleixner | 23af368 | 2009-11-11 14:05:25 +0000 | [diff] [blame] | 226 | SEQ_printf(m, " mult: %u\n", dev->mult); |
| 227 | SEQ_printf(m, " shift: %u\n", dev->shift); |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 228 | SEQ_printf(m, " mode: %d\n", clockevent_get_state(dev)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 229 | SEQ_printf(m, " next_event: %Ld nsecs\n", |
| 230 | (unsigned long long) ktime_to_ns(dev->next_event)); |
| 231 | |
| 232 | SEQ_printf(m, " set_next_event: "); |
| 233 | print_name_offset(m, dev->set_next_event); |
| 234 | SEQ_printf(m, "\n"); |
| 235 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 236 | if (dev->set_state_shutdown) { |
| 237 | SEQ_printf(m, " shutdown: "); |
| 238 | print_name_offset(m, dev->set_state_shutdown); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 239 | SEQ_printf(m, "\n"); |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 240 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 241 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 242 | if (dev->set_state_periodic) { |
| 243 | SEQ_printf(m, " periodic: "); |
| 244 | print_name_offset(m, dev->set_state_periodic); |
| 245 | SEQ_printf(m, "\n"); |
| 246 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 247 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 248 | if (dev->set_state_oneshot) { |
| 249 | SEQ_printf(m, " oneshot: "); |
| 250 | print_name_offset(m, dev->set_state_oneshot); |
| 251 | SEQ_printf(m, "\n"); |
| 252 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 253 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 254 | if (dev->set_state_oneshot_stopped) { |
| 255 | SEQ_printf(m, " oneshot stopped: "); |
| 256 | print_name_offset(m, dev->set_state_oneshot_stopped); |
| 257 | SEQ_printf(m, "\n"); |
| 258 | } |
Viresh Kumar | 8fff52f | 2015-04-03 09:04:04 +0530 | [diff] [blame] | 259 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 260 | if (dev->tick_resume) { |
| 261 | SEQ_printf(m, " resume: "); |
| 262 | print_name_offset(m, dev->tick_resume); |
| 263 | SEQ_printf(m, "\n"); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 264 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 265 | |
| 266 | SEQ_printf(m, " event_handler: "); |
| 267 | print_name_offset(m, dev->event_handler); |
| 268 | SEQ_printf(m, "\n"); |
Thomas Gleixner | 80a05b9 | 2010-03-12 17:34:14 +0100 | [diff] [blame] | 269 | SEQ_printf(m, " retries: %lu\n", dev->retries); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 270 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 271 | } |
| 272 | |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 273 | static void timer_list_show_tickdevices_header(struct seq_file *m) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 274 | { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 275 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 276 | print_tickdevice(m, tick_get_broadcast_device(), -1); |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 277 | SEQ_printf(m, "tick_broadcast_mask: %*pb\n", |
| 278 | cpumask_pr_args(tick_get_broadcast_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 279 | #ifdef CONFIG_TICK_ONESHOT |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 280 | SEQ_printf(m, "tick_broadcast_oneshot_mask: %*pb\n", |
| 281 | cpumask_pr_args(tick_get_broadcast_oneshot_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 282 | #endif |
| 283 | SEQ_printf(m, "\n"); |
| 284 | #endif |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 285 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 286 | #endif |
| 287 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 288 | static inline void timer_list_header(struct seq_file *m, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 289 | { |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 290 | SEQ_printf(m, "Timer List Version: v0.8\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 291 | SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES); |
| 292 | SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 293 | SEQ_printf(m, "\n"); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 294 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 295 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 296 | static int timer_list_show(struct seq_file *m, void *v) |
| 297 | { |
| 298 | struct timer_list_iter *iter = v; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 299 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 300 | if (iter->cpu == -1 && !iter->second_pass) |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 301 | timer_list_header(m, iter->now); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 302 | else if (!iter->second_pass) |
| 303 | print_cpu(m, iter->cpu, iter->now); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 304 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 305 | else if (iter->cpu == -1 && iter->second_pass) |
| 306 | timer_list_show_tickdevices_header(m); |
| 307 | else |
| 308 | print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 309 | #endif |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 310 | return 0; |
| 311 | } |
| 312 | |
| 313 | void sysrq_timer_list_show(void) |
| 314 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 315 | u64 now = ktime_to_ns(ktime_get()); |
| 316 | int cpu; |
| 317 | |
| 318 | timer_list_header(NULL, now); |
| 319 | |
| 320 | for_each_online_cpu(cpu) |
| 321 | print_cpu(NULL, cpu, now); |
| 322 | |
| 323 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 324 | timer_list_show_tickdevices_header(NULL); |
| 325 | for_each_online_cpu(cpu) |
| 326 | print_tickdevice(NULL, tick_get_device(cpu), cpu); |
| 327 | #endif |
| 328 | return; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 329 | } |
| 330 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 331 | static void *move_iter(struct timer_list_iter *iter, loff_t offset) |
| 332 | { |
| 333 | for (; offset; offset--) { |
| 334 | iter->cpu = cpumask_next(iter->cpu, cpu_online_mask); |
| 335 | if (iter->cpu >= nr_cpu_ids) { |
| 336 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 337 | if (!iter->second_pass) { |
| 338 | iter->cpu = -1; |
| 339 | iter->second_pass = true; |
| 340 | } else |
| 341 | return NULL; |
| 342 | #else |
| 343 | return NULL; |
| 344 | #endif |
| 345 | } |
| 346 | } |
| 347 | return iter; |
| 348 | } |
| 349 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 350 | static void *timer_list_start(struct seq_file *file, loff_t *offset) |
| 351 | { |
| 352 | struct timer_list_iter *iter = file->private; |
| 353 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 354 | if (!*offset) |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 355 | iter->now = ktime_to_ns(ktime_get()); |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 356 | iter->cpu = -1; |
| 357 | iter->second_pass = false; |
| 358 | return move_iter(iter, *offset); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 359 | } |
| 360 | |
| 361 | static void *timer_list_next(struct seq_file *file, void *v, loff_t *offset) |
| 362 | { |
| 363 | struct timer_list_iter *iter = file->private; |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 364 | ++*offset; |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 365 | return move_iter(iter, 1); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 366 | } |
| 367 | |
| 368 | static void timer_list_stop(struct seq_file *seq, void *v) |
| 369 | { |
| 370 | } |
| 371 | |
| 372 | static const struct seq_operations timer_list_sops = { |
| 373 | .start = timer_list_start, |
| 374 | .next = timer_list_next, |
| 375 | .stop = timer_list_stop, |
| 376 | .show = timer_list_show, |
| 377 | }; |
| 378 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 379 | static int timer_list_open(struct inode *inode, struct file *filp) |
| 380 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 381 | return seq_open_private(filp, &timer_list_sops, |
| 382 | sizeof(struct timer_list_iter)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 383 | } |
| 384 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 385 | static const struct file_operations timer_list_fops = { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 386 | .open = timer_list_open, |
| 387 | .read = seq_read, |
| 388 | .llseek = seq_lseek, |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 389 | .release = seq_release_private, |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 390 | }; |
| 391 | |
| 392 | static int __init init_timer_list_procfs(void) |
| 393 | { |
| 394 | struct proc_dir_entry *pe; |
| 395 | |
Amerigo Wang | de80934 | 2009-08-17 05:43:01 -0400 | [diff] [blame] | 396 | pe = proc_create("timer_list", 0444, NULL, &timer_list_fops); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 397 | if (!pe) |
| 398 | return -ENOMEM; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 399 | return 0; |
| 400 | } |
| 401 | __initcall(init_timer_list_procfs); |