include/trace/events/timer.h
Source file repositories/reference/linux-study-clean/include/trace/events/timer.h
File Facts
- System
- Linux kernel
- Corpus path
include/trace/events/timer.h- Extension
.h- Size
- 12129 bytes
- Lines
- 490
- Domain
- Repository Root And Misc
- Bucket
- include
- Inferred role
- Repository Root And Misc: implementation source
- Status
- source implementation candidate
Why This File Exists
Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.
- Top-level or miscellaneous repository surface. Use this as map coverage unless a later manual pass promotes the file into a deeper subsystem dossier.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
linux/tracepoint.hlinux/hrtimer.hlinux/timer.htrace/define_trace.h
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
#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
* @bucket_expiry: the bucket expiry time
*/
TRACE_EVENT(timer_start,
TP_PROTO(struct timer_list *timer,
unsigned long bucket_expiry),
TP_ARGS(timer, bucket_expiry),
TP_STRUCT__entry(
__field( void *, timer )
__field( void *, function )
__field( unsigned long, expires )
__field( unsigned long, bucket_expiry )
__field( unsigned long, now )
__field( unsigned int, flags )
),
TP_fast_assign(
__entry->timer = timer;
__entry->function = timer->function;
__entry->expires = timer->expires;
__entry->bucket_expiry = bucket_expiry;
__entry->now = jiffies;
__entry->flags = timer->flags;
),
TP_printk("timer=%p function=%ps expires=%lu [timeout=%ld] bucket_expiry=%lu cpu=%u idx=%u flags=%s",
__entry->timer, __entry->function, __entry->expires,
(long)__entry->expires - __entry->now,
__entry->bucket_expiry, __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
* @baseclk: value of timer_base::clk when timer expires
*
* Allows to determine the timer latency.
*/
Annotation
- Immediate include surface: `linux/tracepoint.h`, `linux/hrtimer.h`, `linux/timer.h`, `trace/define_trace.h`.
- Atlas domain: Repository Root And Misc / include.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.