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 | |
| 32 | DECLARE_PER_CPU(struct hrtimer_cpu_base, hrtimer_bases); |
| 33 | |
| 34 | /* |
| 35 | * This allows printing both to /proc/timer_list and |
| 36 | * to the console (on SysRq-Q): |
| 37 | */ |
Joe Perches | 7de4e74 | 2015-04-17 11:39:18 -0700 | [diff] [blame] | 38 | __printf(2, 3) |
| 39 | static void SEQ_printf(struct seq_file *m, const char *fmt, ...) |
| 40 | { |
| 41 | va_list args; |
| 42 | |
| 43 | va_start(args, fmt); |
| 44 | |
| 45 | if (m) |
| 46 | seq_vprintf(m, fmt, args); |
| 47 | else |
| 48 | vprintk(fmt, args); |
| 49 | |
| 50 | va_end(args); |
| 51 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 52 | |
| 53 | static void print_name_offset(struct seq_file *m, void *sym) |
| 54 | { |
Tejun Heo | 9281ace | 2007-07-17 04:03:51 -0700 | [diff] [blame] | 55 | char symname[KSYM_NAME_LEN]; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 56 | |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 57 | if (lookup_symbol_name((unsigned long)sym, symname) < 0) |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 58 | SEQ_printf(m, "<%pK>", sym); |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 59 | else |
| 60 | SEQ_printf(m, "%s", symname); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 61 | } |
| 62 | |
| 63 | static void |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 64 | print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer, |
| 65 | int idx, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 66 | { |
| 67 | #ifdef CONFIG_TIMER_STATS |
| 68 | char tmp[TASK_COMM_LEN + 1]; |
| 69 | #endif |
| 70 | SEQ_printf(m, " #%d: ", idx); |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 71 | print_name_offset(m, taddr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 72 | SEQ_printf(m, ", "); |
| 73 | print_name_offset(m, timer->function); |
| 74 | SEQ_printf(m, ", S:%02lx", timer->state); |
| 75 | #ifdef CONFIG_TIMER_STATS |
| 76 | SEQ_printf(m, ", "); |
| 77 | print_name_offset(m, timer->start_site); |
| 78 | memcpy(tmp, timer->start_comm, TASK_COMM_LEN); |
| 79 | tmp[TASK_COMM_LEN] = 0; |
| 80 | SEQ_printf(m, ", %s/%d", tmp, timer->start_pid); |
| 81 | #endif |
| 82 | SEQ_printf(m, "\n"); |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 83 | SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n", |
| 84 | (unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 85 | (unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)), |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 86 | (long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 87 | (long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 88 | } |
| 89 | |
| 90 | static void |
| 91 | print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base, |
| 92 | u64 now) |
| 93 | { |
| 94 | struct hrtimer *timer, tmp; |
| 95 | unsigned long next = 0, i; |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 96 | struct timerqueue_node *curr; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 97 | unsigned long flags; |
| 98 | |
| 99 | next_one: |
| 100 | i = 0; |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 101 | raw_spin_lock_irqsave(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 102 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 103 | curr = timerqueue_getnext(&base->active); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 104 | /* |
| 105 | * Crude but we have to do this O(N*N) thing, because |
| 106 | * we have to unlock the base when printing: |
| 107 | */ |
| 108 | while (curr && i < next) { |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 109 | curr = timerqueue_iterate_next(curr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 110 | i++; |
| 111 | } |
| 112 | |
| 113 | if (curr) { |
| 114 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 115 | timer = container_of(curr, struct hrtimer, node); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 116 | tmp = *timer; |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 117 | raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 118 | |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 119 | print_timer(m, timer, &tmp, i, now); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 120 | next++; |
| 121 | goto next_one; |
| 122 | } |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 123 | raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 124 | } |
| 125 | |
| 126 | static void |
| 127 | print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now) |
| 128 | { |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 129 | SEQ_printf(m, " .base: %pK\n", base); |
Thomas Gleixner | 398ca17 | 2015-04-14 21:08:27 +0000 | [diff] [blame] | 130 | SEQ_printf(m, " .index: %d\n", base->index); |
| 131 | |
| 132 | SEQ_printf(m, " .resolution: %u nsecs\n", (unsigned) hrtimer_resolution); |
| 133 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 134 | SEQ_printf(m, " .get_time: "); |
| 135 | print_name_offset(m, base->get_time); |
| 136 | SEQ_printf(m, "\n"); |
| 137 | #ifdef CONFIG_HIGH_RES_TIMERS |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 138 | SEQ_printf(m, " .offset: %Lu nsecs\n", |
| 139 | (unsigned long long) ktime_to_ns(base->offset)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 140 | #endif |
| 141 | SEQ_printf(m, "active timers:\n"); |
| 142 | print_active_timers(m, base, now); |
| 143 | } |
| 144 | |
| 145 | static void print_cpu(struct seq_file *m, int cpu, u64 now) |
| 146 | { |
| 147 | struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu); |
| 148 | int i; |
| 149 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 150 | SEQ_printf(m, "cpu: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 151 | for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) { |
| 152 | SEQ_printf(m, " clock %d:\n", i); |
| 153 | print_base(m, cpu_base->clock_base + i, now); |
| 154 | } |
| 155 | #define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 156 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 157 | (unsigned long long)(cpu_base->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 158 | #define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 159 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 160 | (unsigned long long)(ktime_to_ns(cpu_base->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 161 | |
| 162 | #ifdef CONFIG_HIGH_RES_TIMERS |
| 163 | P_ns(expires_next); |
| 164 | P(hres_active); |
| 165 | P(nr_events); |
Thomas Gleixner | 41d2e49 | 2009-11-13 17:05:44 +0100 | [diff] [blame] | 166 | P(nr_retries); |
| 167 | P(nr_hangs); |
Thomas Gleixner | a6ffebc | 2015-04-14 21:08:34 +0000 | [diff] [blame] | 168 | P(max_hang_time); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 169 | #endif |
| 170 | #undef P |
| 171 | #undef P_ns |
| 172 | |
| 173 | #ifdef CONFIG_TICK_ONESHOT |
| 174 | # define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 175 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 176 | (unsigned long long)(ts->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 177 | # define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 178 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 179 | (unsigned long long)(ktime_to_ns(ts->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 180 | { |
| 181 | struct tick_sched *ts = tick_get_tick_sched(cpu); |
| 182 | P(nohz_mode); |
Frederic Weisbecker | f5d411c | 2011-07-31 17:44:12 +0200 | [diff] [blame] | 183 | P_ns(last_tick); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 184 | P(tick_stopped); |
| 185 | P(idle_jiffies); |
| 186 | P(idle_calls); |
| 187 | P(idle_sleeps); |
| 188 | P_ns(idle_entrytime); |
Thomas Gleixner | 5df7fa1 | 2008-02-01 17:45:14 +0100 | [diff] [blame] | 189 | P_ns(idle_waketime); |
| 190 | P_ns(idle_exittime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 191 | P_ns(idle_sleeptime); |
Arjan van de Ven | 0224cf4 | 2010-05-09 08:25:23 -0700 | [diff] [blame] | 192 | P_ns(iowait_sleeptime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 193 | P(last_jiffies); |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 194 | P(next_timer); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 195 | P_ns(idle_expires); |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 196 | SEQ_printf(m, "jiffies: %Lu\n", |
| 197 | (unsigned long long)jiffies); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 198 | } |
| 199 | #endif |
| 200 | |
| 201 | #undef P |
| 202 | #undef P_ns |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 203 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 207 | static void |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 208 | print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 209 | { |
| 210 | struct clock_event_device *dev = td->evtdev; |
| 211 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 212 | SEQ_printf(m, "Tick Device: mode: %d\n", td->mode); |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 213 | if (cpu < 0) |
| 214 | SEQ_printf(m, "Broadcast device\n"); |
| 215 | else |
| 216 | SEQ_printf(m, "Per CPU device: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 217 | |
| 218 | SEQ_printf(m, "Clock Event Device: "); |
| 219 | if (!dev) { |
| 220 | SEQ_printf(m, "<NULL>\n"); |
| 221 | return; |
| 222 | } |
| 223 | SEQ_printf(m, "%s\n", dev->name); |
Jon Hunter | 97813f2 | 2009-08-18 12:45:11 -0500 | [diff] [blame] | 224 | SEQ_printf(m, " max_delta_ns: %llu\n", |
| 225 | (unsigned long long) dev->max_delta_ns); |
| 226 | SEQ_printf(m, " min_delta_ns: %llu\n", |
| 227 | (unsigned long long) dev->min_delta_ns); |
Thomas Gleixner | 23af368 | 2009-11-11 14:05:25 +0000 | [diff] [blame] | 228 | SEQ_printf(m, " mult: %u\n", dev->mult); |
| 229 | SEQ_printf(m, " shift: %u\n", dev->shift); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 230 | SEQ_printf(m, " mode: %d\n", dev->mode); |
| 231 | SEQ_printf(m, " next_event: %Ld nsecs\n", |
| 232 | (unsigned long long) ktime_to_ns(dev->next_event)); |
| 233 | |
| 234 | SEQ_printf(m, " set_next_event: "); |
| 235 | print_name_offset(m, dev->set_next_event); |
| 236 | SEQ_printf(m, "\n"); |
| 237 | |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 238 | if (dev->set_mode) { |
| 239 | SEQ_printf(m, " set_mode: "); |
| 240 | print_name_offset(m, dev->set_mode); |
| 241 | SEQ_printf(m, "\n"); |
| 242 | } else { |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 243 | if (dev->set_state_shutdown) { |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 244 | SEQ_printf(m, " shutdown: "); |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 245 | print_name_offset(m, dev->set_state_shutdown); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 246 | SEQ_printf(m, "\n"); |
| 247 | } |
| 248 | |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 249 | if (dev->set_state_periodic) { |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 250 | SEQ_printf(m, " periodic: "); |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 251 | print_name_offset(m, dev->set_state_periodic); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 252 | SEQ_printf(m, "\n"); |
| 253 | } |
| 254 | |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 255 | if (dev->set_state_oneshot) { |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 256 | SEQ_printf(m, " oneshot: "); |
Viresh Kumar | 77e32c8 | 2015-02-27 17:21:33 +0530 | [diff] [blame] | 257 | print_name_offset(m, dev->set_state_oneshot); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 258 | SEQ_printf(m, "\n"); |
| 259 | } |
| 260 | |
Viresh Kumar | 8fff52f | 2015-04-03 09:04:04 +0530 | [diff] [blame^] | 261 | if (dev->set_state_oneshot_stopped) { |
| 262 | SEQ_printf(m, " oneshot stopped: "); |
| 263 | print_name_offset(m, dev->set_state_oneshot_stopped); |
| 264 | SEQ_printf(m, "\n"); |
| 265 | } |
| 266 | |
Viresh Kumar | 554ef38 | 2015-02-27 17:21:32 +0530 | [diff] [blame] | 267 | if (dev->tick_resume) { |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 268 | SEQ_printf(m, " resume: "); |
Viresh Kumar | 554ef38 | 2015-02-27 17:21:32 +0530 | [diff] [blame] | 269 | print_name_offset(m, dev->tick_resume); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 270 | SEQ_printf(m, "\n"); |
| 271 | } |
| 272 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 273 | |
| 274 | SEQ_printf(m, " event_handler: "); |
| 275 | print_name_offset(m, dev->event_handler); |
| 276 | SEQ_printf(m, "\n"); |
Thomas Gleixner | 80a05b9 | 2010-03-12 17:34:14 +0100 | [diff] [blame] | 277 | SEQ_printf(m, " retries: %lu\n", dev->retries); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 278 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 279 | } |
| 280 | |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 281 | static void timer_list_show_tickdevices_header(struct seq_file *m) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 282 | { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 283 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 284 | print_tickdevice(m, tick_get_broadcast_device(), -1); |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 285 | SEQ_printf(m, "tick_broadcast_mask: %*pb\n", |
| 286 | cpumask_pr_args(tick_get_broadcast_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 287 | #ifdef CONFIG_TICK_ONESHOT |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 288 | SEQ_printf(m, "tick_broadcast_oneshot_mask: %*pb\n", |
| 289 | cpumask_pr_args(tick_get_broadcast_oneshot_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 290 | #endif |
| 291 | SEQ_printf(m, "\n"); |
| 292 | #endif |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 293 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 294 | #endif |
| 295 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 296 | static inline void timer_list_header(struct seq_file *m, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 297 | { |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 298 | SEQ_printf(m, "Timer List Version: v0.8\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 299 | SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES); |
| 300 | SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 301 | SEQ_printf(m, "\n"); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 302 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 303 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 304 | static int timer_list_show(struct seq_file *m, void *v) |
| 305 | { |
| 306 | struct timer_list_iter *iter = v; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 307 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 308 | if (iter->cpu == -1 && !iter->second_pass) |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 309 | timer_list_header(m, iter->now); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 310 | else if (!iter->second_pass) |
| 311 | print_cpu(m, iter->cpu, iter->now); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 312 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 313 | else if (iter->cpu == -1 && iter->second_pass) |
| 314 | timer_list_show_tickdevices_header(m); |
| 315 | else |
| 316 | print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 317 | #endif |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | void sysrq_timer_list_show(void) |
| 322 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 323 | u64 now = ktime_to_ns(ktime_get()); |
| 324 | int cpu; |
| 325 | |
| 326 | timer_list_header(NULL, now); |
| 327 | |
| 328 | for_each_online_cpu(cpu) |
| 329 | print_cpu(NULL, cpu, now); |
| 330 | |
| 331 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 332 | timer_list_show_tickdevices_header(NULL); |
| 333 | for_each_online_cpu(cpu) |
| 334 | print_tickdevice(NULL, tick_get_device(cpu), cpu); |
| 335 | #endif |
| 336 | return; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 337 | } |
| 338 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 339 | static void *move_iter(struct timer_list_iter *iter, loff_t offset) |
| 340 | { |
| 341 | for (; offset; offset--) { |
| 342 | iter->cpu = cpumask_next(iter->cpu, cpu_online_mask); |
| 343 | if (iter->cpu >= nr_cpu_ids) { |
| 344 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 345 | if (!iter->second_pass) { |
| 346 | iter->cpu = -1; |
| 347 | iter->second_pass = true; |
| 348 | } else |
| 349 | return NULL; |
| 350 | #else |
| 351 | return NULL; |
| 352 | #endif |
| 353 | } |
| 354 | } |
| 355 | return iter; |
| 356 | } |
| 357 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 358 | static void *timer_list_start(struct seq_file *file, loff_t *offset) |
| 359 | { |
| 360 | struct timer_list_iter *iter = file->private; |
| 361 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 362 | if (!*offset) |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 363 | iter->now = ktime_to_ns(ktime_get()); |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 364 | iter->cpu = -1; |
| 365 | iter->second_pass = false; |
| 366 | return move_iter(iter, *offset); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | static void *timer_list_next(struct seq_file *file, void *v, loff_t *offset) |
| 370 | { |
| 371 | struct timer_list_iter *iter = file->private; |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 372 | ++*offset; |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 373 | return move_iter(iter, 1); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | static void timer_list_stop(struct seq_file *seq, void *v) |
| 377 | { |
| 378 | } |
| 379 | |
| 380 | static const struct seq_operations timer_list_sops = { |
| 381 | .start = timer_list_start, |
| 382 | .next = timer_list_next, |
| 383 | .stop = timer_list_stop, |
| 384 | .show = timer_list_show, |
| 385 | }; |
| 386 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 387 | static int timer_list_open(struct inode *inode, struct file *filp) |
| 388 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 389 | return seq_open_private(filp, &timer_list_sops, |
| 390 | sizeof(struct timer_list_iter)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 391 | } |
| 392 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 393 | static const struct file_operations timer_list_fops = { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 394 | .open = timer_list_open, |
| 395 | .read = seq_read, |
| 396 | .llseek = seq_lseek, |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 397 | .release = seq_release_private, |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 398 | }; |
| 399 | |
| 400 | static int __init init_timer_list_procfs(void) |
| 401 | { |
| 402 | struct proc_dir_entry *pe; |
| 403 | |
Amerigo Wang | de80934 | 2009-08-17 05:43:01 -0400 | [diff] [blame] | 404 | pe = proc_create("timer_list", 0444, NULL, &timer_list_fops); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 405 | if (!pe) |
| 406 | return -ENOMEM; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 407 | return 0; |
| 408 | } |
| 409 | __initcall(init_timer_list_procfs); |