perf session: Dont queue events w/o timestamps

If the event has no timestamp assigned then the parse code sets it to
~0ULL which causes the ordering code to enqueue it at the end.

Process it right away.
Reported-by: Ian Munsie <imunsie@au1.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20101207124550.528788441@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/session.c

@@ -603,7 +603,7 @@ static int perf_session_queue_event(struct perf_session *s, event_t *event,
 	u64 timestamp = data->time;
 	struct sample_queue *new;
 
-	if (!timestamp)
+	if (!timestamp || timestamp == ~0ULL)
 		return -ETIME;
 
 	if (timestamp < s->ordered_samples.last_flush) {