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-rw-r--r--monitor.c53
1 files changed, 37 insertions, 16 deletions
diff --git a/monitor.c b/monitor.c
index 07a0f76..525d8e4 100644
--- a/monitor.c
+++ b/monitor.c
@@ -450,7 +450,7 @@ static MonitorQAPIEventConf monitor_qapi_event_conf[QAPI_EVENT_MAX] = {
[QAPI_EVENT_VSERPORT_CHANGE] = { 1000 * SCALE_MS },
};
-static MonitorQAPIEventState monitor_qapi_event_state[QAPI_EVENT_MAX];
+GHashTable *monitor_qapi_event_state;
/*
* Emits the event to every monitor instance, @event is only used for trace
@@ -468,6 +468,8 @@ static void monitor_qapi_event_emit(QAPIEvent event, QDict *qdict)
}
}
+static void monitor_qapi_event_handler(void *opaque);
+
/*
* Queue a new event for emission to Monitor instances,
* applying any rate limiting if required.
@@ -480,7 +482,6 @@ monitor_qapi_event_queue(QAPIEvent event, QDict *qdict, Error **errp)
assert(event < QAPI_EVENT_MAX);
evconf = &monitor_qapi_event_conf[event];
- evstate = &monitor_qapi_event_state[event];
trace_monitor_protocol_event_queue(event, qdict, evconf->rate);
qemu_mutex_lock(&monitor_lock);
@@ -489,7 +490,12 @@ monitor_qapi_event_queue(QAPIEvent event, QDict *qdict, Error **errp)
/* Unthrottled event */
monitor_qapi_event_emit(event, qdict);
} else {
- if (timer_pending(evstate->timer)) {
+ MonitorQAPIEventState key = { .event = event };
+
+ evstate = g_hash_table_lookup(monitor_qapi_event_state, &key);
+ assert(!evstate || timer_pending(evstate->timer));
+
+ if (evstate) {
/*
* Timer is pending for (at least) evconf->rate ns after
* last send. Store event for sending when timer fires,
@@ -508,6 +514,14 @@ monitor_qapi_event_queue(QAPIEvent event, QDict *qdict, Error **errp)
int64_t now = qemu_clock_get_ns(QEMU_CLOCK_REALTIME);
monitor_qapi_event_emit(event, qdict);
+
+ evstate = g_new(MonitorQAPIEventState, 1);
+ evstate->event = event;
+ evstate->qdict = NULL;
+ evstate->timer = timer_new_ns(QEMU_CLOCK_REALTIME,
+ monitor_qapi_event_handler,
+ evstate);
+ g_hash_table_add(monitor_qapi_event_state, evstate);
timer_mod_ns(evstate->timer, now + evconf->rate);
}
}
@@ -535,27 +549,34 @@ static void monitor_qapi_event_handler(void *opaque)
QDECREF(evstate->qdict);
evstate->qdict = NULL;
timer_mod_ns(evstate->timer, now + evconf->rate);
+ } else {
+ g_hash_table_remove(monitor_qapi_event_state, evstate);
+ timer_free(evstate->timer);
+ g_free(evstate);
}
qemu_mutex_unlock(&monitor_lock);
}
-static void monitor_qapi_event_init(void)
+static unsigned int qapi_event_throttle_hash(const void *key)
{
- int i;
- MonitorQAPIEventState *evstate;
+ const MonitorQAPIEventState *evstate = key;
- for (i = 0; i < QAPI_EVENT_MAX; i++) {
- if (monitor_qapi_event_conf[i].rate) {
- evstate = &monitor_qapi_event_state[i];
- evstate->event = i;
- evstate->qdict = NULL;
- evstate->timer = timer_new_ns(QEMU_CLOCK_REALTIME,
- monitor_qapi_event_handler,
- evstate);
- }
- }
+ return evstate->event * 255;
+}
+static gboolean qapi_event_throttle_equal(const void *a, const void *b)
+{
+ const MonitorQAPIEventState *eva = a;
+ const MonitorQAPIEventState *evb = b;
+
+ return eva->event == evb->event;
+}
+
+static void monitor_qapi_event_init(void)
+{
+ monitor_qapi_event_state = g_hash_table_new(qapi_event_throttle_hash,
+ qapi_event_throttle_equal);
qmp_event_set_func_emit(monitor_qapi_event_queue);
}
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