Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  itimers: Add tracepoints for itimer
  hrtimer: Add tracepoint for hrtimers
  timers: Add tracepoints for timer_list timers
  cputime: Optimize jiffies_to_cputime(1)
  itimers: Simplify arm_timer() code a bit
  itimers: Fix periodic tics precision
  itimers: Merge ITIMER_VIRT and ITIMER_PROF

Trivial header file include conflicts in kernel/fork.c

1 files changed, 342 insertions, 0 deletions

diff --git a/include/trace/events/timer.h b/include/trace/events/timer.h
new file mode 100644
index 000000000000..1844c48d640e
--- /dev/null
+++ b/include/trace/events/timer.h
@@ -0,0 +1,342 @@
+#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>
+
+/**
+ * timer_init - called when the timer is initialized
+ * @timer:      pointer to struct timer_list
+ */
+TRACE_EVENT(timer_init,
+
+        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_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),
+
+        TP_ARGS(timer, expires),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer           )
+                __field( void *,        function        )
+                __field( unsigned long, expires         )
+                __field( unsigned long, now             )
+        ),
+
+        TP_fast_assign(
+                __entry->timer          = timer;
+                __entry->function       = timer->function;
+                __entry->expires        = expires;
+                __entry->now            = jiffies;
+        ),
+
+        TP_printk("timer %p: func %pf, expires %lu, timeout %ld",
+                  __entry->timer, __entry->function, __entry->expires,
+                  (long)__entry->expires - __entry->now)
+);
+
+/**
+ * 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),
+
+        TP_ARGS(timer),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer   )
+                __field( unsigned long, now     )
+        ),
+
+        TP_fast_assign(
+                __entry->timer          = timer;
+                __entry->now            = jiffies;
+        ),
+
+        TP_printk("timer %p: now %lu", __entry->timer, __entry->now)
+);
+
+/**
+ * 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.
+ */
+TRACE_EVENT(timer_expire_exit,
+
+        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_cancel - called when the timer is canceled
+ * @timer:      pointer to struct timer_list
+ */
+TRACE_EVENT(timer_cancel,
+
+        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)
+);
+
+/**
+ * hrtimer_init - called when the hrtimer is initialized
+ * @timer:      pointer to struct hrtimer
+ * @clockid:    the hrtimers clock
+ * @mode:       the hrtimers mode
+ */
+TRACE_EVENT(hrtimer_init,
+
+        TP_PROTO(struct hrtimer *timer, clockid_t clockid,
+                 enum hrtimer_mode mode),
+
+        TP_ARGS(timer, clockid, mode),
+
+        TP_STRUCT__entry(
+                __field( void *,                timer           )
+                __field( clockid_t,             clockid         )
+                __field( enum hrtimer_mode,     mode            )
+        ),
+
+        TP_fast_assign(
+                __entry->timer          = timer;
+                __entry->clockid        = clockid;
+                __entry->mode           = mode;
+        ),
+
+        TP_printk("hrtimer %p, clockid %s, mode %s", __entry->timer,
+                  __entry->clockid == CLOCK_REALTIME ?
+                        "CLOCK_REALTIME" : "CLOCK_MONOTONIC",
+                  __entry->mode == HRTIMER_MODE_ABS ?
+                        "HRTIMER_MODE_ABS" : "HRTIMER_MODE_REL")
+);
+
+/**
+ * hrtimer_start - called when the hrtimer is started
+ * @timer: pointer to struct hrtimer
+ */
+TRACE_EVENT(hrtimer_start,
+
+        TP_PROTO(struct hrtimer *timer),
+
+        TP_ARGS(timer),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer           )
+                __field( void *,        function        )
+                __field( s64,           expires         )
+                __field( s64,           softexpires     )
+        ),
+
+        TP_fast_assign(
+                __entry->timer          = timer;
+                __entry->function       = timer->function;
+                __entry->expires        = hrtimer_get_expires(timer).tv64;
+                __entry->softexpires    = hrtimer_get_softexpires(timer).tv64;
+        ),
+
+        TP_printk("hrtimer %p, func %pf, expires %llu, softexpires %llu",
+                  __entry->timer, __entry->function,
+                  (unsigned long long)ktime_to_ns((ktime_t) {
+                                  .tv64 = __entry->expires }),
+                  (unsigned long long)ktime_to_ns((ktime_t) {
+                                  .tv64 = __entry->softexpires }))
+);
+
+/**
+ * htimmer_expire_entry - called immediately before the hrtimer callback
+ * @timer:      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 *timer, ktime_t *now),
+
+        TP_ARGS(timer, now),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer   )
+                __field( s64,           now     )
+        ),
+
+        TP_fast_assign(
+                __entry->timer  = timer;
+                __entry->now    = now->tv64;
+        ),
+
+        TP_printk("hrtimer %p, now %llu", __entry->timer,
+                  (unsigned long long)ktime_to_ns((ktime_t) {
+                                  .tv64 = __entry->now }))
+ );
+
+/**
+ * hrtimer_expire_exit - called immediately after the hrtimer callback returns
+ * @timer:      pointer to struct hrtimer
+ *
+ * When used in combination with the hrtimer_expire_entry tracepoint we can
+ * determine the runtime of the callback function.
+ */
+TRACE_EVENT(hrtimer_expire_exit,
+
+        TP_PROTO(struct hrtimer *timer),
+
+        TP_ARGS(timer),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer   )
+        ),
+
+        TP_fast_assign(
+                __entry->timer  = timer;
+        ),
+
+        TP_printk("hrtimer %p", __entry->timer)
+);
+
+/**
+ * hrtimer_cancel - called when the hrtimer is canceled
+ * @timer:      pointer to struct hrtimer
+ */
+TRACE_EVENT(hrtimer_cancel,
+
+        TP_PROTO(struct hrtimer *timer),
+
+        TP_ARGS(timer),
+
+        TP_STRUCT__entry(
+                __field( void *,        timer   )
+        ),
+
+        TP_fast_assign(
+                __entry->timer  = timer;
+        ),
+
+        TP_printk("hrtimer %p", __entry->timer)
+);
+
+/**
+ * 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 itimerval *const value,
+                 cputime_t expires),
+
+        TP_ARGS(which, value, expires),
+
+        TP_STRUCT__entry(
+                __field(        int,            which           )
+                __field(        cputime_t,      expires         )
+                __field(        long,           value_sec       )
+                __field(        long,           value_usec      )
+                __field(        long,           interval_sec    )
+                __field(        long,           interval_usec   )
+        ),
+
+        TP_fast_assign(
+                __entry->which          = which;
+                __entry->expires        = expires;
+                __entry->value_sec      = value->it_value.tv_sec;
+                __entry->value_usec     = value->it_value.tv_usec;
+                __entry->interval_sec   = value->it_interval.tv_sec;
+                __entry->interval_usec  = value->it_interval.tv_usec;
+        ),
+
+        TP_printk("which %d, expires %lu, it_value %lu.%lu, it_interval %lu.%lu",
+                  __entry->which, __entry->expires,
+                  __entry->value_sec, __entry->value_usec,
+                  __entry->interval_sec, __entry->interval_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, cputime_t now),
+
+        TP_ARGS(which, pid, now),
+
+        TP_STRUCT__entry(
+                __field( int ,          which   )
+                __field( pid_t,         pid     )
+                __field( cputime_t,     now     )
+        ),
+
+        TP_fast_assign(
+                __entry->which  = which;
+                __entry->now    = now;
+                __entry->pid    = pid_nr(pid);
+        ),
+
+            TP_printk("which %d, pid %d, now %lu", __entry->which,
+                      (int) __entry->pid, __entry->now)
+);
+
+#endif /*  _TRACE_TIMER_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>