*
*
*/
+#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)
{
t->expiration_time = tw->current_tick + interval;
ts = &tw->overflow;
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, pool_index, t - tw->timers);
+#endif
return t - tw->timers;
}
#endif
ts = &tw->w[TW_TIMER_RING_GLACIER][glacier_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
-
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, pool_index, t - tw->timers);
+#endif
return t - tw->timers;
}
#endif
ts = &tw->w[TW_TIMER_RING_SLOW][slow_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
-
+#if TW_START_STOP_TRACE_SIZE > 0
+ TW (tw_timer_trace) (tw, timer_id, pool_index, t - tw->timers);
+#endif
return t - tw->timers;
}
#else
ts = &tw->w[TW_TIMER_RING_FAST][fast_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+
+#if TW_FAST_WHEEL_BITMAP
+ 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, pool_index, t - tw->timers);
+#endif
return t - tw->timers;
}
{
TWT (tw_timer) * t;
+#if TW_TIMER_ALLOW_DUPLICATE_STOP
+ /*
+ * A vlib process may have its timer expire, and receive
+ * an event before the expiration is processed.
+ * That results in a duplicate tw_timer_stop.
+ */
+ 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) */
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;
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 */
{
ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+#if TW_FAST_WHEEL_BITMAP
+ tw->fast_slot_bitmap =
+ clib_bitmap_set (tw->fast_slot_bitmap,
+ t->fast_ring_offset, 1);
+#endif
}
}
}
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 */
{
ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+#if TW_FAST_WHEEL_BITMAP
+ tw->fast_slot_bitmap =
+ clib_bitmap_set (tw->fast_slot_bitmap,
+ t->fast_ring_offset, 1);
+#endif
}
else /* typical case */
{
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 */
/* Add to fast ring */
ts = &tw->w[TW_TIMER_RING_FAST][t->fast_ring_offset];
timer_addhead (tw->timers, ts->head_index, t - tw->timers);
+#if TW_FAST_WHEEL_BITMAP
+ tw->fast_slot_bitmap =
+ clib_bitmap_set (tw->fast_slot_bitmap,
+ t->fast_ring_offset, 1);
+#endif
}
}
}
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;
}
+
+#if TW_FAST_WHEEL_BITMAP
+ tw->fast_slot_bitmap = clib_bitmap_set (tw->fast_slot_bitmap,
+ fast_wheel_index, 0);
+#endif
+
tw->current_tick++;
fast_wheel_index++;
tw->current_index[TW_TIMER_RING_FAST] = fast_wheel_index;
return TW (tw_timer_expire_timers_internal) (tw, now, vec);
}
+#if TW_FAST_WHEEL_BITMAP
+/** Returns an approximation to the first timer expiration in
+ * timer-ticks from "now". To avoid wasting an unjustifiable
+ * amount of time on the problem, we maintain an approximate fast-wheel slot
+ * occupancy bitmap. We don't worry about clearing fast wheel bits
+ * when timers are removed from fast wheel slots.
+ */
+
+u32 TW (tw_timer_first_expires_in_ticks) (TWT (tw_timer_wheel) * tw)
+{
+ u32 first_expiring_index, fast_ring_index;
+ i32 delta;
+
+ if (clib_bitmap_is_zero (tw->fast_slot_bitmap))
+ return TW_SLOTS_PER_RING;
+
+ fast_ring_index = tw->current_index[TW_TIMER_RING_FAST];
+ if (fast_ring_index == TW_SLOTS_PER_RING)
+ fast_ring_index = 0;
+
+ first_expiring_index = clib_bitmap_next_set (tw->fast_slot_bitmap,
+ fast_ring_index);
+ if (first_expiring_index == ~0 && fast_ring_index != 0)
+ first_expiring_index = clib_bitmap_first_set (tw->fast_slot_bitmap);
+
+ ASSERT (first_expiring_index != ~0);
+
+ delta = (i32) first_expiring_index - (i32) fast_ring_index;
+ if (delta < 0)
+ delta += TW_SLOTS_PER_RING;
+
+ ASSERT (delta >= 0);
+
+ return (u32) delta;
+}
+
+#endif
+
/*
* fd.io coding-style-patch-verification: ON
*
Code Review / vpp.git / blobdiff