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> |
Tom Hromatka | 00c001f | 2017-01-04 15:28:04 -0700 | [diff] [blame] | 19 | #include <linux/nmi.h> |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 20 | |
| 21 | #include <asm/uaccess.h> |
| 22 | |
Thomas Gleixner | c1797ba | 2015-03-25 13:07:37 +0100 | [diff] [blame] | 23 | #include "tick-internal.h" |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 24 | |
| 25 | struct timer_list_iter { |
| 26 | int cpu; |
| 27 | bool second_pass; |
| 28 | u64 now; |
| 29 | }; |
| 30 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 31 | typedef void (*print_fn_t)(struct seq_file *m, unsigned int *classes); |
| 32 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 33 | /* |
| 34 | * This allows printing both to /proc/timer_list and |
| 35 | * to the console (on SysRq-Q): |
| 36 | */ |
Joe Perches | 7de4e74 | 2015-04-17 11:39:18 -0700 | [diff] [blame] | 37 | __printf(2, 3) |
| 38 | static void SEQ_printf(struct seq_file *m, const char *fmt, ...) |
| 39 | { |
| 40 | va_list args; |
| 41 | |
| 42 | va_start(args, fmt); |
| 43 | |
| 44 | if (m) |
| 45 | seq_vprintf(m, fmt, args); |
| 46 | else |
| 47 | vprintk(fmt, args); |
| 48 | |
| 49 | va_end(args); |
| 50 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 51 | |
| 52 | static void print_name_offset(struct seq_file *m, void *sym) |
| 53 | { |
Tejun Heo | 9281ace | 2007-07-17 04:03:51 -0700 | [diff] [blame] | 54 | char symname[KSYM_NAME_LEN]; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 55 | |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 56 | if (lookup_symbol_name((unsigned long)sym, symname) < 0) |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 57 | SEQ_printf(m, "<%pK>", sym); |
Alexey Dobriyan | 9d65cb4 | 2007-05-08 00:28:43 -0700 | [diff] [blame] | 58 | else |
| 59 | SEQ_printf(m, "%s", symname); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | static void |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 63 | print_timer(struct seq_file *m, struct hrtimer *taddr, struct hrtimer *timer, |
| 64 | int idx, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 65 | { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 66 | SEQ_printf(m, " #%d: ", idx); |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 67 | print_name_offset(m, taddr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 68 | SEQ_printf(m, ", "); |
| 69 | print_name_offset(m, timer->function); |
Thomas Gleixner | 203cbf7 | 2016-01-14 16:54:46 +0000 | [diff] [blame] | 70 | SEQ_printf(m, ", S:%02x", timer->state); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 71 | SEQ_printf(m, "\n"); |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 72 | SEQ_printf(m, " # expires at %Lu-%Lu nsecs [in %Ld to %Ld nsecs]\n", |
| 73 | (unsigned long long)ktime_to_ns(hrtimer_get_softexpires(timer)), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 74 | (unsigned long long)ktime_to_ns(hrtimer_get_expires(timer)), |
Arjan van de Ven | 704af52 | 2008-09-07 16:10:20 -0700 | [diff] [blame] | 75 | (long long)(ktime_to_ns(hrtimer_get_softexpires(timer)) - now), |
Arjan van de Ven | cc584b2 | 2008-09-01 15:02:30 -0700 | [diff] [blame] | 76 | (long long)(ktime_to_ns(hrtimer_get_expires(timer)) - now)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 77 | } |
| 78 | |
| 79 | static void |
| 80 | print_active_timers(struct seq_file *m, struct hrtimer_clock_base *base, |
| 81 | u64 now) |
| 82 | { |
| 83 | struct hrtimer *timer, tmp; |
| 84 | unsigned long next = 0, i; |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 85 | struct timerqueue_node *curr; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 86 | unsigned long flags; |
| 87 | |
| 88 | next_one: |
| 89 | i = 0; |
Tom Hromatka | 00c001f | 2017-01-04 15:28:04 -0700 | [diff] [blame] | 90 | |
| 91 | touch_nmi_watchdog(); |
| 92 | |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 93 | raw_spin_lock_irqsave(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 94 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 95 | curr = timerqueue_getnext(&base->active); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 96 | /* |
| 97 | * Crude but we have to do this O(N*N) thing, because |
| 98 | * we have to unlock the base when printing: |
| 99 | */ |
| 100 | while (curr && i < next) { |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 101 | curr = timerqueue_iterate_next(curr); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 102 | i++; |
| 103 | } |
| 104 | |
| 105 | if (curr) { |
| 106 | |
John Stultz | 998adc3 | 2010-09-20 19:19:17 -0700 | [diff] [blame] | 107 | timer = container_of(curr, struct hrtimer, node); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 108 | tmp = *timer; |
Thomas Gleixner | ecb49d1 | 2009-11-17 16:36:54 +0100 | [diff] [blame] | 109 | raw_spin_unlock_irqrestore(&base->cpu_base->lock, flags); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 110 | |
Thomas Gleixner | e67ef25 | 2008-09-25 23:50:23 +0200 | [diff] [blame] | 111 | print_timer(m, timer, &tmp, i, now); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 112 | next++; |
| 113 | goto next_one; |
| 114 | } |
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 | } |
| 117 | |
| 118 | static void |
| 119 | print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now) |
| 120 | { |
Kees Cook | f590308 | 2011-02-11 19:21:25 -0800 | [diff] [blame] | 121 | SEQ_printf(m, " .base: %pK\n", base); |
Thomas Gleixner | 398ca17 | 2015-04-14 21:08:27 +0000 | [diff] [blame] | 122 | SEQ_printf(m, " .index: %d\n", base->index); |
| 123 | |
| 124 | SEQ_printf(m, " .resolution: %u nsecs\n", (unsigned) hrtimer_resolution); |
| 125 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 126 | SEQ_printf(m, " .get_time: "); |
| 127 | print_name_offset(m, base->get_time); |
| 128 | SEQ_printf(m, "\n"); |
| 129 | #ifdef CONFIG_HIGH_RES_TIMERS |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 130 | SEQ_printf(m, " .offset: %Lu nsecs\n", |
| 131 | (unsigned long long) ktime_to_ns(base->offset)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 132 | #endif |
| 133 | SEQ_printf(m, "active timers:\n"); |
John Stultz | 38bf985 | 2015-05-27 16:44:48 -0700 | [diff] [blame] | 134 | print_active_timers(m, base, now + ktime_to_ns(base->offset)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 135 | } |
| 136 | |
| 137 | static void print_cpu(struct seq_file *m, int cpu, u64 now) |
| 138 | { |
| 139 | struct hrtimer_cpu_base *cpu_base = &per_cpu(hrtimer_bases, cpu); |
| 140 | int i; |
| 141 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 142 | SEQ_printf(m, "cpu: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 143 | for (i = 0; i < HRTIMER_MAX_CLOCK_BASES; i++) { |
| 144 | SEQ_printf(m, " clock %d:\n", i); |
| 145 | print_base(m, cpu_base->clock_base + i, now); |
| 146 | } |
| 147 | #define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 148 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 149 | (unsigned long long)(cpu_base->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 150 | #define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 151 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 152 | (unsigned long long)(ktime_to_ns(cpu_base->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 153 | |
| 154 | #ifdef CONFIG_HIGH_RES_TIMERS |
| 155 | P_ns(expires_next); |
| 156 | P(hres_active); |
| 157 | P(nr_events); |
Thomas Gleixner | 41d2e49 | 2009-11-13 17:05:44 +0100 | [diff] [blame] | 158 | P(nr_retries); |
| 159 | P(nr_hangs); |
Thomas Gleixner | a6ffebc | 2015-04-14 21:08:34 +0000 | [diff] [blame] | 160 | P(max_hang_time); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 161 | #endif |
| 162 | #undef P |
| 163 | #undef P_ns |
| 164 | |
| 165 | #ifdef CONFIG_TICK_ONESHOT |
| 166 | # define P(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 167 | SEQ_printf(m, " .%-15s: %Lu\n", #x, \ |
| 168 | (unsigned long long)(ts->x)) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 169 | # define P_ns(x) \ |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 170 | SEQ_printf(m, " .%-15s: %Lu nsecs\n", #x, \ |
| 171 | (unsigned long long)(ktime_to_ns(ts->x))) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 172 | { |
| 173 | struct tick_sched *ts = tick_get_tick_sched(cpu); |
| 174 | P(nohz_mode); |
Frederic Weisbecker | f5d411c | 2011-07-31 17:44:12 +0200 | [diff] [blame] | 175 | P_ns(last_tick); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 176 | P(tick_stopped); |
| 177 | P(idle_jiffies); |
| 178 | P(idle_calls); |
| 179 | P(idle_sleeps); |
| 180 | P_ns(idle_entrytime); |
Thomas Gleixner | 5df7fa1 | 2008-02-01 17:45:14 +0100 | [diff] [blame] | 181 | P_ns(idle_waketime); |
| 182 | P_ns(idle_exittime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 183 | P_ns(idle_sleeptime); |
Arjan van de Ven | 0224cf4 | 2010-05-09 08:25:23 -0700 | [diff] [blame] | 184 | P_ns(iowait_sleeptime); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 185 | P(last_jiffies); |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 186 | P(next_timer); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 187 | P_ns(idle_expires); |
David Miller | 9b04bd2 | 2007-05-09 02:33:43 -0700 | [diff] [blame] | 188 | SEQ_printf(m, "jiffies: %Lu\n", |
| 189 | (unsigned long long)jiffies); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 190 | } |
| 191 | #endif |
| 192 | |
| 193 | #undef P |
| 194 | #undef P_ns |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 195 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 196 | } |
| 197 | |
| 198 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 199 | static void |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 200 | print_tickdevice(struct seq_file *m, struct tick_device *td, int cpu) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 201 | { |
| 202 | struct clock_event_device *dev = td->evtdev; |
| 203 | |
Tom Hromatka | 00c001f | 2017-01-04 15:28:04 -0700 | [diff] [blame] | 204 | touch_nmi_watchdog(); |
| 205 | |
Vegard Nossum | 129f1d2 | 2007-10-11 08:23:34 +0200 | [diff] [blame] | 206 | SEQ_printf(m, "Tick Device: mode: %d\n", td->mode); |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 207 | if (cpu < 0) |
| 208 | SEQ_printf(m, "Broadcast device\n"); |
| 209 | else |
| 210 | SEQ_printf(m, "Per CPU device: %d\n", cpu); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 211 | |
| 212 | SEQ_printf(m, "Clock Event Device: "); |
| 213 | if (!dev) { |
| 214 | SEQ_printf(m, "<NULL>\n"); |
| 215 | return; |
| 216 | } |
| 217 | SEQ_printf(m, "%s\n", dev->name); |
Jon Hunter | 97813f2 | 2009-08-18 12:45:11 -0500 | [diff] [blame] | 218 | SEQ_printf(m, " max_delta_ns: %llu\n", |
| 219 | (unsigned long long) dev->max_delta_ns); |
| 220 | SEQ_printf(m, " min_delta_ns: %llu\n", |
| 221 | (unsigned long long) dev->min_delta_ns); |
Thomas Gleixner | 23af368 | 2009-11-11 14:05:25 +0000 | [diff] [blame] | 222 | SEQ_printf(m, " mult: %u\n", dev->mult); |
| 223 | SEQ_printf(m, " shift: %u\n", dev->shift); |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 224 | SEQ_printf(m, " mode: %d\n", clockevent_get_state(dev)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 225 | SEQ_printf(m, " next_event: %Ld nsecs\n", |
| 226 | (unsigned long long) ktime_to_ns(dev->next_event)); |
| 227 | |
| 228 | SEQ_printf(m, " set_next_event: "); |
| 229 | print_name_offset(m, dev->set_next_event); |
| 230 | SEQ_printf(m, "\n"); |
| 231 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 232 | if (dev->set_state_shutdown) { |
| 233 | SEQ_printf(m, " shutdown: "); |
| 234 | print_name_offset(m, dev->set_state_shutdown); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 235 | SEQ_printf(m, "\n"); |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 236 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 237 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 238 | if (dev->set_state_periodic) { |
| 239 | SEQ_printf(m, " periodic: "); |
| 240 | print_name_offset(m, dev->set_state_periodic); |
| 241 | SEQ_printf(m, "\n"); |
| 242 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 243 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 244 | if (dev->set_state_oneshot) { |
| 245 | SEQ_printf(m, " oneshot: "); |
| 246 | print_name_offset(m, dev->set_state_oneshot); |
| 247 | SEQ_printf(m, "\n"); |
| 248 | } |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 249 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 250 | if (dev->set_state_oneshot_stopped) { |
| 251 | SEQ_printf(m, " oneshot stopped: "); |
| 252 | print_name_offset(m, dev->set_state_oneshot_stopped); |
| 253 | SEQ_printf(m, "\n"); |
| 254 | } |
Viresh Kumar | 8fff52f | 2015-04-03 09:04:04 +0530 | [diff] [blame] | 255 | |
Viresh Kumar | eef7635 | 2015-09-11 09:34:26 +0530 | [diff] [blame] | 256 | if (dev->tick_resume) { |
| 257 | SEQ_printf(m, " resume: "); |
| 258 | print_name_offset(m, dev->tick_resume); |
| 259 | SEQ_printf(m, "\n"); |
Viresh Kumar | bd624d7 | 2015-02-13 08:54:56 +0800 | [diff] [blame] | 260 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 261 | |
| 262 | SEQ_printf(m, " event_handler: "); |
| 263 | print_name_offset(m, dev->event_handler); |
| 264 | SEQ_printf(m, "\n"); |
Thomas Gleixner | 80a05b9 | 2010-03-12 17:34:14 +0100 | [diff] [blame] | 265 | SEQ_printf(m, " retries: %lu\n", dev->retries); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 266 | SEQ_printf(m, "\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 267 | } |
| 268 | |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 269 | static void timer_list_show_tickdevices_header(struct seq_file *m) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 270 | { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 271 | #ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST |
Thomas Gleixner | c5b77a3 | 2008-09-29 17:31:41 +0200 | [diff] [blame] | 272 | print_tickdevice(m, tick_get_broadcast_device(), -1); |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 273 | SEQ_printf(m, "tick_broadcast_mask: %*pb\n", |
| 274 | cpumask_pr_args(tick_get_broadcast_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 275 | #ifdef CONFIG_TICK_ONESHOT |
Preeti U Murthy | 1ef09cd | 2015-04-28 14:15:20 +0530 | [diff] [blame] | 276 | SEQ_printf(m, "tick_broadcast_oneshot_mask: %*pb\n", |
| 277 | cpumask_pr_args(tick_get_broadcast_oneshot_mask())); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 278 | #endif |
| 279 | SEQ_printf(m, "\n"); |
| 280 | #endif |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 281 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 282 | #endif |
| 283 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 284 | static inline void timer_list_header(struct seq_file *m, u64 now) |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 285 | { |
Thomas Gleixner | c1ad348 | 2015-04-14 21:08:58 +0000 | [diff] [blame] | 286 | SEQ_printf(m, "Timer List Version: v0.8\n"); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 287 | SEQ_printf(m, "HRTIMER_MAX_CLOCK_BASES: %d\n", HRTIMER_MAX_CLOCK_BASES); |
| 288 | SEQ_printf(m, "now at %Ld nsecs\n", (unsigned long long)now); |
Nathan Zimmer | 60cf7ea | 2013-03-26 19:56:29 -0500 | [diff] [blame] | 289 | SEQ_printf(m, "\n"); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 290 | } |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 291 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 292 | void sysrq_timer_list_show(void) |
| 293 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 294 | u64 now = ktime_to_ns(ktime_get()); |
| 295 | int cpu; |
| 296 | |
| 297 | timer_list_header(NULL, now); |
| 298 | |
| 299 | for_each_online_cpu(cpu) |
| 300 | print_cpu(NULL, cpu, now); |
| 301 | |
| 302 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 303 | timer_list_show_tickdevices_header(NULL); |
| 304 | for_each_online_cpu(cpu) |
| 305 | print_tickdevice(NULL, tick_get_device(cpu), cpu); |
| 306 | #endif |
| 307 | return; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 308 | } |
| 309 | |
Nathan Huckleberry | 8cc6df3 | 2019-06-14 11:16:04 -0700 | [diff] [blame] | 310 | #ifdef CONFIG_PROC_FS |
| 311 | static int timer_list_show(struct seq_file *m, void *v) |
| 312 | { |
| 313 | struct timer_list_iter *iter = v; |
| 314 | |
| 315 | if (iter->cpu == -1 && !iter->second_pass) |
| 316 | timer_list_header(m, iter->now); |
| 317 | else if (!iter->second_pass) |
| 318 | print_cpu(m, iter->cpu, iter->now); |
| 319 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 320 | else if (iter->cpu == -1 && iter->second_pass) |
| 321 | timer_list_show_tickdevices_header(m); |
| 322 | else |
| 323 | print_tickdevice(m, tick_get_device(iter->cpu), iter->cpu); |
| 324 | #endif |
| 325 | return 0; |
| 326 | } |
| 327 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 328 | static void *move_iter(struct timer_list_iter *iter, loff_t offset) |
| 329 | { |
| 330 | for (; offset; offset--) { |
| 331 | iter->cpu = cpumask_next(iter->cpu, cpu_online_mask); |
| 332 | if (iter->cpu >= nr_cpu_ids) { |
| 333 | #ifdef CONFIG_GENERIC_CLOCKEVENTS |
| 334 | if (!iter->second_pass) { |
| 335 | iter->cpu = -1; |
| 336 | iter->second_pass = true; |
| 337 | } else |
| 338 | return NULL; |
| 339 | #else |
| 340 | return NULL; |
| 341 | #endif |
| 342 | } |
| 343 | } |
| 344 | return iter; |
| 345 | } |
| 346 | |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 347 | static void *timer_list_start(struct seq_file *file, loff_t *offset) |
| 348 | { |
| 349 | struct timer_list_iter *iter = file->private; |
| 350 | |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 351 | if (!*offset) |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 352 | iter->now = ktime_to_ns(ktime_get()); |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 353 | iter->cpu = -1; |
| 354 | iter->second_pass = false; |
| 355 | return move_iter(iter, *offset); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | static void *timer_list_next(struct seq_file *file, void *v, loff_t *offset) |
| 359 | { |
| 360 | struct timer_list_iter *iter = file->private; |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 361 | ++*offset; |
Nathan Zimmer | 84a78a6 | 2013-08-28 16:35:14 -0700 | [diff] [blame] | 362 | return move_iter(iter, 1); |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | static void timer_list_stop(struct seq_file *seq, void *v) |
| 366 | { |
| 367 | } |
| 368 | |
| 369 | static const struct seq_operations timer_list_sops = { |
| 370 | .start = timer_list_start, |
| 371 | .next = timer_list_next, |
| 372 | .stop = timer_list_stop, |
| 373 | .show = timer_list_show, |
| 374 | }; |
| 375 | |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 376 | static int timer_list_open(struct inode *inode, struct file *filp) |
| 377 | { |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 378 | return seq_open_private(filp, &timer_list_sops, |
| 379 | sizeof(struct timer_list_iter)); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 380 | } |
| 381 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 382 | static const struct file_operations timer_list_fops = { |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 383 | .open = timer_list_open, |
| 384 | .read = seq_read, |
| 385 | .llseek = seq_lseek, |
Nathan Zimmer | b3956a8 | 2013-03-26 19:56:30 -0500 | [diff] [blame] | 386 | .release = seq_release_private, |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 387 | }; |
| 388 | |
| 389 | static int __init init_timer_list_procfs(void) |
| 390 | { |
| 391 | struct proc_dir_entry *pe; |
| 392 | |
Ingo Molnar | 1098aad | 2017-11-13 07:15:41 +0100 | [diff] [blame] | 393 | pe = proc_create("timer_list", 0400, NULL, &timer_list_fops); |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 394 | if (!pe) |
| 395 | return -ENOMEM; |
Ingo Molnar | 289f480 | 2007-02-16 01:28:15 -0800 | [diff] [blame] | 396 | return 0; |
| 397 | } |
| 398 | __initcall(init_timer_list_procfs); |
Nathan Huckleberry | 8cc6df3 | 2019-06-14 11:16:04 -0700 | [diff] [blame] | 399 | #endif |