*
*
*/
+#if TW_START_STOP_TRACE_SIZE > 0
+
+void TW (tw_timer_trace) (TWT (tw_timer_wheel) * tw, u32 timer_id,
+ u32 pool_index, u32 handle)
+{
+ TWT (trace) * t = &tw->traces[tw->trace_index];
+
+ t->timer_id = timer_id;
+ t->pool_index = pool_index;
+ t->handle = handle;
+
+ tw->trace_index++;
+ if (tw->trace_index == TW_START_STOP_TRACE_SIZE)
+ {
+ tw->trace_index = 0;
+ tw->trace_wrapped++;
+ }
+}
+
+void TW (tw_search_trace) (TWT (tw_timer_wheel) * tw, u32 handle)
+{
+ u32 i, start_pos;
+ TWT (trace) * t;
+ char *s = "bogus!";
+
+ /* reverse search for the supplied handle */
+
+ start_pos = tw->trace_index;
+ if (start_pos == 0)
+ start_pos = TW_START_STOP_TRACE_SIZE - 1;
+ else
+ start_pos--;
+
+ for (i = start_pos; i > 0; i--)
+ {
+ t = &tw->traces[i];
+ if (t->handle == handle)
+ {
+ switch (t->timer_id)
+ {
+ case 0xFF:
+ s = "stopped";
+ break;
+ case 0xFE:
+ s = "expired";
+ break;
+ default:
+ s = "started";
+ break;
+ }
+ fformat (stderr, "handle 0x%x (%d) %s at trace %d\n",
+ handle, handle, s, i);
+ }
+ }
+ if (tw->trace_wrapped > 0)
+ {
+ for (i = TW_START_STOP_TRACE_SIZE; i >= tw->trace_index; i--)
+ {
+ t = &tw->traces[i];
+ if (t->handle == handle)
+ {
+ switch (t->timer_id)
+ {
+ case 0xFF:
+ s = "stopped";
+ break;
+ case 0xFE:
+ s = "expired";
+ break;
+ default:
+ s = "started";
+ break;
+ }
+ fformat (stderr, "handle 0x%x (%d) %s at trace %d\n",
+ handle, handle, s, i);
+ }
+ }
+ }
+}
+#endif /* TW_START_STOP_TRACE_SIZE > 0 */
+
static inline u32
TW (make_internal_timer_handle) (u32 pool_index, u32 timer_id)
{
}
static inline void
-timer_remove (TWT (tw_timer) * pool, u32 index)
+timer_remove (TWT (tw_timer) * pool, TWT (tw_timer) * elt)
{
- TWT (tw_timer) * elt = pool_elt_at_index (pool, index);
TWT (tw_timer) * next_elt, *prev_elt;
ASSERT (elt->user_handle != ~0);
elt->prev = elt->next = ~0;
}
-/**
- * @brief Start a Tw Timer
- * @param tw_timer_wheel_t * tw timer wheel object pointer
- * @param u32 pool_index user pool index, presumably for a tw session
- * @param u32 timer_id app-specific timer ID. 4 bits.
- * @param u64 interval timer interval in ticks
- * @returns handle needed to cancel the timer
- */
-u32
-TW (tw_timer_start) (TWT (tw_timer_wheel) * tw, u32 pool_index, u32 timer_id,
- u64 interval)
+static inline void
+timer_add (TWT (tw_timer_wheel) * tw, TWT (tw_timer) * t, u64 interval)
{
#if TW_TIMER_WHEELS > 1
u16 slow_ring_offset;
#endif
u16 fast_ring_offset;
tw_timer_wheel_slot_t *ts;
- TWT (tw_timer) * t;
-
- ASSERT (interval);
-
- pool_get (tw->timers, t);
- memset (t, 0xff, sizeof (*t));
-
- t->user_handle = TW (make_internal_timer_handle) (pool_index, timer_id);
/* Factor interval into 1..3 wheel offsets */
#if TW_TIMER_WHEELS > 2
t->expiration_time = tw->current_tick + interval;
ts = &tw->overflow;
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
- return t - tw->timers;
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers);
+#endif
+ return;
}
#endif
ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
-
- return t - tw->timers;
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers);
+#endif
+ return;
}
#endif
ts = &tw->w[TW_TIMER_RING_SLOW][slow_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
-
- return t - tw->timers;
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers);
+#endif
+ return;
}
#else
fast_ring_offset %= TW_SLOTS_PER_RING;
tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap,
fast_ring_offset, 1);
#endif
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, user_id, t - tw->timers);
+#endif
+}
+
+/**
+ * @brief Start a Tw Timer
+ * @param tw_timer_wheel_t * tw timer wheel object pointer
+ * @param u32 user_id user defined timer id, presumably for a tw session
+ * @param u32 timer_id app-specific timer ID. 4 bits.
+ * @param u64 interval timer interval in ticks
+ * @returns handle needed to cancel the timer
+ */
+u32
+TW (tw_timer_start) (TWT (tw_timer_wheel) * tw, u32 user_id, u32 timer_id,
+ u64 interval)
+{
+ TWT (tw_timer) * t;
+
+ ASSERT (interval);
+
+ pool_get (tw->timers, t);
+ clib_memset (t, 0xff, sizeof (*t));
+
+ t->user_handle = TW (make_internal_timer_handle) (user_id, timer_id);
+
+ timer_add (tw, t, interval);
return t - tw->timers;
}
if (pool_is_free_index (tw->timers, handle))
return;
#endif
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, ~0, ~0, handle);
+#endif
t = pool_elt_at_index (tw->timers, handle);
/* in case of idiotic handle (e.g. passing a listhead index) */
ASSERT (t->user_handle != ~0);
- timer_remove (tw->timers, handle);
+ timer_remove (tw->timers, t);
pool_put_index (tw->timers, handle);
}
+int TW (tw_timer_handle_is_free) (TWT (tw_timer_wheel) * tw, u32 handle)
+{
+ return pool_is_free_index (tw->timers, handle);
+}
+
+/**
+ * @brief Update a tw timer
+ * @param tw_timer_wheel_t * tw timer wheel object pointer
+ * @param u32 handle timer returned by tw_timer_start
+ * @param u32 interval timer interval in ticks
+ */
+void TW (tw_timer_update) (TWT (tw_timer_wheel) * tw, u32 handle,
+ u64 interval)
+{
+ TWT (tw_timer) * t;
+ t = pool_elt_at_index (tw->timers, handle);
+ timer_remove (tw->timers, t);
+ timer_add (tw, t, interval);
+}
+
/**
* @brief Initialize a tw timer wheel template instance
* @param tw_timer_wheel_t * tw timer wheel object pointer
int ring, slot;
tw_timer_wheel_slot_t *ts;
TWT (tw_timer) * t;
- memset (tw, 0, sizeof (*tw));
+ clib_memset (tw, 0, sizeof (*tw));
tw->expired_timer_callback = expired_timer_callback;
tw->max_expirations = max_expirations;
if (timer_interval_in_seconds == 0.0)
}
tw->timer_interval = timer_interval_in_seconds;
tw->ticks_per_second = 1.0 / timer_interval_in_seconds;
- tw->first_expires_tick = ~0ULL;
+
vec_validate (tw->expired_timer_handles, 0);
_vec_len (tw->expired_timer_handles) = 0;
{
ts = &tw->w[ring][slot];
pool_get (tw->timers, t);
- memset (t, 0xff, sizeof (*t));
+ clib_memset (t, 0xff, sizeof (*t));
t->next = t->prev = t - tw->timers;
ts->head_index = t - tw->timers;
}
#if TW_OVERFLOW_VECTOR > 0
ts = &tw->overflow;
pool_get (tw->timers, t);
- memset (t, 0xff, sizeof (*t));
+ clib_memset (t, 0xff, sizeof (*t));
t->next = t->prev = t - tw->timers;
ts->head_index = t - tw->timers;
#endif
}
}
-#if TW_OVERFLOW_VECVOR > 0
+#if TW_OVERFLOW_VECTOR > 0
ts = &tw->overflow;
head = pool_elt_at_index (tw->timers, ts->head_index);
next_index = head->next;
pool_put (tw->timers, head);
#endif
- memset (tw, 0, sizeof (*tw));
+ clib_memset (tw, 0, sizeof (*tw));
}
/**
u32 slow_wheel_index __attribute__ ((unused));
u32 glacier_wheel_index __attribute__ ((unused));
- /* Shouldn't happen */
+ /* Called too soon to process new timer expirations? */
if (PREDICT_FALSE (now < tw->next_run_time))
return callback_vector_arg;
/* Remember when we ran, compute next runtime */
tw->next_run_time = (now + tw->timer_interval);
+ /* First call, or time jumped backwards? */
+ if (PREDICT_FALSE
+ ((tw->last_run_time == 0.0) || (now <= tw->last_run_time)))
+ {
+ tw->last_run_time = now;
+ return callback_vector_arg;
+ }
+
if (callback_vector_arg == 0)
{
_vec_len (tw->expired_timer_handles) = 0;
new_glacier_ring_offset == 0))
{
vec_add1 (callback_vector, t->user_handle);
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
+#endif
pool_put (tw->timers, t);
}
/* Timer moves to the glacier ring */
t->fast_ring_offset == 0))
{
vec_add1 (callback_vector, t->user_handle);
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
+#endif
pool_put (tw->timers, t);
}
/* Timer expires during slow-wheel tick 0 */
if (PREDICT_FALSE (t->fast_ring_offset == 0))
{
vec_add1 (callback_vector, t->user_handle);
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle,
+ t - tw->timers);
+#endif
pool_put (tw->timers, t);
}
else /* typical case */
t = pool_elt_at_index (tw->timers, next_index);
next_index = t->next;
vec_add1 (callback_vector, t->user_handle);
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, 0xfe, t->user_handle, t - tw->timers);
+#endif
pool_put (tw->timers, t);
}
if (tw->expired_timer_callback)
{
tw->expired_timer_callback (callback_vector);
- _vec_len (callback_vector) = 0;
+ vec_reset_length (callback_vector);
}
tw->expired_timer_handles = callback_vector;
}
u32 first_expiring_index, fast_ring_index;
i32 delta;
+#if TW_TIMER_WHEELS > 1
+ fast_ring_index = tw->current_index[TW_TIMER_RING_FAST];
+ if (fast_ring_index == TW_SLOTS_PER_RING)
+ return 1;
+
+ first_expiring_index = clib_bitmap_next_set (tw->fast_slot_bitmap,
+ fast_ring_index);
+ if (first_expiring_index == ~0)
+ first_expiring_index = TW_SLOTS_PER_RING;
+
+#else
+
if (clib_bitmap_is_zero (tw->fast_slot_bitmap))
return TW_SLOTS_PER_RING;
fast_ring_index);
if (first_expiring_index == ~0 && fast_ring_index != 0)
first_expiring_index = clib_bitmap_first_set (tw->fast_slot_bitmap);
+#endif
ASSERT (first_expiring_index != ~0);
Code Review / vpp.git / blobdiff