diff options
Diffstat (limited to '')
| -rw-r--r-- | include/trace/events/timer.h | 427 |
1 files changed, 427 insertions, 0 deletions
diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h new file mode 100644 index 000000000..5c540ccab --- /dev/null +++ b/include/trace/events/timer.h @@ -0,0 +1,427 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM timer + +#if !defined(_TRACE_TIMER_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_TIMER_H + +#include <linux/tracepoint.h> +#include <linux/hrtimer.h> +#include <linux/timer.h> + +DECLARE_EVENT_CLASS(timer_class, + + TP_PROTO(struct timer_list *timer), + + TP_ARGS(timer), + + TP_STRUCT__entry( + __field( void *, timer ) + ), + + TP_fast_assign( + __entry->timer = timer; + ), + + TP_printk("timer=%p", __entry->timer) +); + +/** + * timer_init - called when the timer is initialized + * @timer: pointer to struct timer_list + */ +DEFINE_EVENT(timer_class, timer_init, + + TP_PROTO(struct timer_list *timer), + + TP_ARGS(timer) +); + +#define decode_timer_flags(flags) \ + __print_flags(flags, "|", \ + { TIMER_MIGRATING, "M" }, \ + { TIMER_DEFERRABLE, "D" }, \ + { TIMER_PINNED, "P" }, \ + { TIMER_IRQSAFE, "I" }) + +/** + * timer_start - called when the timer is started + * @timer: pointer to struct timer_list + * @expires: the timers expiry time + */ +TRACE_EVENT(timer_start, + + TP_PROTO(struct timer_list *timer, + unsigned long expires, + unsigned int flags), + + TP_ARGS(timer, expires, flags), + + TP_STRUCT__entry( + __field( void *, timer ) + __field( void *, function ) + __field( unsigned long, expires ) + __field( unsigned long, now ) + __field( unsigned int, flags ) + ), + + TP_fast_assign( + __entry->timer = timer; + __entry->function = timer->function; + __entry->expires = expires; + __entry->now = jiffies; + __entry->flags = flags; + ), + + TP_printk("timer=%p function=%ps expires=%lu [timeout=%ld] cpu=%u idx=%u flags=%s", + __entry->timer, __entry->function, __entry->expires, + (long)__entry->expires - __entry->now, + __entry->flags & TIMER_CPUMASK, + __entry->flags >> TIMER_ARRAYSHIFT, + decode_timer_flags(__entry->flags & TIMER_TRACE_FLAGMASK)) +); + +/** + * timer_expire_entry - called immediately before the timer callback + * @timer: pointer to struct timer_list + * + * Allows to determine the timer latency. + */ +TRACE_EVENT(timer_expire_entry, + + TP_PROTO(struct timer_list *timer, unsigned long baseclk), + + TP_ARGS(timer, baseclk), + + TP_STRUCT__entry( + __field( void *, timer ) + __field( unsigned long, now ) + __field( void *, function) + __field( unsigned long, baseclk ) + ), + + TP_fast_assign( + __entry->timer = timer; + __entry->now = jiffies; + __entry->function = timer->function; + __entry->baseclk = baseclk; + ), + + TP_printk("timer=%p function=%ps now=%lu baseclk=%lu", + __entry->timer, __entry->function, __entry->now, + __entry->baseclk) +); + +/** + * timer_expire_exit - called immediately after the timer callback returns + * @timer: pointer to struct timer_list + * + * When used in combination with the timer_expire_entry tracepoint we can + * determine the runtime of the timer callback function. + * + * NOTE: Do NOT derefernce timer in TP_fast_assign. The pointer might + * be invalid. We solely track the pointer. + */ +DEFINE_EVENT(timer_class, timer_expire_exit, + + TP_PROTO(struct timer_list *timer), + + TP_ARGS(timer) +); + +/** + * timer_cancel - called when the timer is canceled + * @timer: pointer to struct timer_list + */ +DEFINE_EVENT(timer_class, timer_cancel, + + TP_PROTO(struct timer_list *timer), + + TP_ARGS(timer) +); + +#define decode_clockid(type) \ + __print_symbolic(type, \ + { CLOCK_REALTIME, "CLOCK_REALTIME" }, \ + { CLOCK_MONOTONIC, "CLOCK_MONOTONIC" }, \ + { CLOCK_BOOTTIME, "CLOCK_BOOTTIME" }, \ + { CLOCK_TAI, "CLOCK_TAI" }) + +#define decode_hrtimer_mode(mode) \ + __print_symbolic(mode, \ + { HRTIMER_MODE_ABS, "ABS" }, \ + { HRTIMER_MODE_REL, "REL" }, \ + { HRTIMER_MODE_ABS_PINNED, "ABS|PINNED" }, \ + { HRTIMER_MODE_REL_PINNED, "REL|PINNED" }, \ + { HRTIMER_MODE_ABS_SOFT, "ABS|SOFT" }, \ + { HRTIMER_MODE_REL_SOFT, "REL|SOFT" }, \ + { HRTIMER_MODE_ABS_PINNED_SOFT, "ABS|PINNED|SOFT" }, \ + { HRTIMER_MODE_REL_PINNED_SOFT, "REL|PINNED|SOFT" }, \ + { HRTIMER_MODE_ABS_HARD, "ABS|HARD" }, \ + { HRTIMER_MODE_REL_HARD, "REL|HARD" }, \ + { HRTIMER_MODE_ABS_PINNED_HARD, "ABS|PINNED|HARD" }, \ + { HRTIMER_MODE_REL_PINNED_HARD, "REL|PINNED|HARD" }) + +/** + * hrtimer_init - called when the hrtimer is initialized + * @hrtimer: pointer to struct hrtimer + * @clockid: the hrtimers clock + * @mode: the hrtimers mode + */ +TRACE_EVENT(hrtimer_init, + + TP_PROTO(struct hrtimer *hrtimer, clockid_t clockid, + enum hrtimer_mode mode), + + TP_ARGS(hrtimer, clockid, mode), + + TP_STRUCT__entry( + __field( void *, hrtimer ) + __field( clockid_t, clockid ) + __field( enum hrtimer_mode, mode ) + ), + + TP_fast_assign( + __entry->hrtimer = hrtimer; + __entry->clockid = clockid; + __entry->mode = mode; + ), + + TP_printk("hrtimer=%p clockid=%s mode=%s", __entry->hrtimer, + decode_clockid(__entry->clockid), + decode_hrtimer_mode(__entry->mode)) +); + +/** + * hrtimer_start - called when the hrtimer is started + * @hrtimer: pointer to struct hrtimer + */ +TRACE_EVENT(hrtimer_start, + + TP_PROTO(struct hrtimer *hrtimer, enum hrtimer_mode mode), + + TP_ARGS(hrtimer, mode), + + TP_STRUCT__entry( + __field( void *, hrtimer ) + __field( void *, function ) + __field( s64, expires ) + __field( s64, softexpires ) + __field( enum hrtimer_mode, mode ) + ), + + TP_fast_assign( + __entry->hrtimer = hrtimer; + __entry->function = hrtimer->function; + __entry->expires = hrtimer_get_expires(hrtimer); + __entry->softexpires = hrtimer_get_softexpires(hrtimer); + __entry->mode = mode; + ), + + TP_printk("hrtimer=%p function=%ps expires=%llu softexpires=%llu " + "mode=%s", __entry->hrtimer, __entry->function, + (unsigned long long) __entry->expires, + (unsigned long long) __entry->softexpires, + decode_hrtimer_mode(__entry->mode)) +); + +/** + * hrtimer_expire_entry - called immediately before the hrtimer callback + * @hrtimer: pointer to struct hrtimer + * @now: pointer to variable which contains current time of the + * timers base. + * + * Allows to determine the timer latency. + */ +TRACE_EVENT(hrtimer_expire_entry, + + TP_PROTO(struct hrtimer *hrtimer, ktime_t *now), + + TP_ARGS(hrtimer, now), + + TP_STRUCT__entry( + __field( void *, hrtimer ) + __field( s64, now ) + __field( void *, function) + ), + + TP_fast_assign( + __entry->hrtimer = hrtimer; + __entry->now = *now; + __entry->function = hrtimer->function; + ), + + TP_printk("hrtimer=%p function=%ps now=%llu", + __entry->hrtimer, __entry->function, + (unsigned long long) __entry->now) +); + +DECLARE_EVENT_CLASS(hrtimer_class, + + TP_PROTO(struct hrtimer *hrtimer), + + TP_ARGS(hrtimer), + + TP_STRUCT__entry( + __field( void *, hrtimer ) + ), + + TP_fast_assign( + __entry->hrtimer = hrtimer; + ), + + TP_printk("hrtimer=%p", __entry->hrtimer) +); + +/** + * hrtimer_expire_exit - called immediately after the hrtimer callback returns + * @hrtimer: pointer to struct hrtimer + * + * When used in combination with the hrtimer_expire_entry tracepoint we can + * determine the runtime of the callback function. + */ +DEFINE_EVENT(hrtimer_class, hrtimer_expire_exit, + + TP_PROTO(struct hrtimer *hrtimer), + + TP_ARGS(hrtimer) +); + +/** + * hrtimer_cancel - called when the hrtimer is canceled + * @hrtimer: pointer to struct hrtimer + */ +DEFINE_EVENT(hrtimer_class, hrtimer_cancel, + + TP_PROTO(struct hrtimer *hrtimer), + + TP_ARGS(hrtimer) +); + +/** + * itimer_state - called when itimer is started or canceled + * @which: name of the interval timer + * @value: the itimers value, itimer is canceled if value->it_value is + * zero, otherwise it is started + * @expires: the itimers expiry time + */ +TRACE_EVENT(itimer_state, + + TP_PROTO(int which, const struct itimerspec64 *const value, + unsigned long long expires), + + TP_ARGS(which, value, expires), + + TP_STRUCT__entry( + __field( int, which ) + __field( unsigned long long, expires ) + __field( long, value_sec ) + __field( long, value_nsec ) + __field( long, interval_sec ) + __field( long, interval_nsec ) + ), + + TP_fast_assign( + __entry->which = which; + __entry->expires = expires; + __entry->value_sec = value->it_value.tv_sec; + __entry->value_nsec = value->it_value.tv_nsec; + __entry->interval_sec = value->it_interval.tv_sec; + __entry->interval_nsec = value->it_interval.tv_nsec; + ), + + TP_printk("which=%d expires=%llu it_value=%ld.%06ld it_interval=%ld.%06ld", + __entry->which, __entry->expires, + __entry->value_sec, __entry->value_nsec / NSEC_PER_USEC, + __entry->interval_sec, __entry->interval_nsec / NSEC_PER_USEC) +); + +/** + * itimer_expire - called when itimer expires + * @which: type of the interval timer + * @pid: pid of the process which owns the timer + * @now: current time, used to calculate the latency of itimer + */ +TRACE_EVENT(itimer_expire, + + TP_PROTO(int which, struct pid *pid, unsigned long long now), + + TP_ARGS(which, pid, now), + + TP_STRUCT__entry( + __field( int , which ) + __field( pid_t, pid ) + __field( unsigned long long, now ) + ), + + TP_fast_assign( + __entry->which = which; + __entry->now = now; + __entry->pid = pid_nr(pid); + ), + + TP_printk("which=%d pid=%d now=%llu", __entry->which, + (int) __entry->pid, __entry->now) +); + +#ifdef CONFIG_NO_HZ_COMMON + +#define TICK_DEP_NAMES \ + tick_dep_mask_name(NONE) \ + tick_dep_name(POSIX_TIMER) \ + tick_dep_name(PERF_EVENTS) \ + tick_dep_name(SCHED) \ + tick_dep_name(CLOCK_UNSTABLE) \ + tick_dep_name(RCU) \ + tick_dep_name_end(RCU_EXP) + +#undef tick_dep_name +#undef tick_dep_mask_name +#undef tick_dep_name_end + +/* The MASK will convert to their bits and they need to be processed too */ +#define tick_dep_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ + TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); +#define tick_dep_name_end(sdep) TRACE_DEFINE_ENUM(TICK_DEP_BIT_##sdep); \ + TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); +/* NONE only has a mask defined for it */ +#define tick_dep_mask_name(sdep) TRACE_DEFINE_ENUM(TICK_DEP_MASK_##sdep); + +TICK_DEP_NAMES + +#undef tick_dep_name +#undef tick_dep_mask_name +#undef tick_dep_name_end + +#define tick_dep_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, +#define tick_dep_mask_name(sdep) { TICK_DEP_MASK_##sdep, #sdep }, +#define tick_dep_name_end(sdep) { TICK_DEP_MASK_##sdep, #sdep } + +#define show_tick_dep_name(val) \ + __print_symbolic(val, TICK_DEP_NAMES) + +TRACE_EVENT(tick_stop, + + TP_PROTO(int success, int dependency), + + TP_ARGS(success, dependency), + + TP_STRUCT__entry( + __field( int , success ) + __field( int , dependency ) + ), + + TP_fast_assign( + __entry->success = success; + __entry->dependency = dependency; + ), + + TP_printk("success=%d dependency=%s", __entry->success, \ + show_tick_dep_name(__entry->dependency)) +); +#endif + +#endif /* _TRACE_TIMER_H */ + +/* This part must be outside protection */ +#include <trace/define_trace.h> |