librdmacm/cmtime: Force use of multiple threads in work queue

When multiple work items are added to the work queue, it's
possible that only a single thread is signaled to process
the work.  The result is that the other threads continue
to wait on the condition.  Since the test inserts work using
a loop, this occurs frequently, and the behavior appears as
a singled thread app, even if multiple threads were
requested.

After removing a work item, if other work items remain,
signal the condition to wake up another thread.

Signed-off-by: Sean Hefty <[email protected]>

librdmacm/examples/common.c

@@ -395,6 +395,8 @@ static void *wq_handler(void *arg)
  }
 
  item = wq_remove(wq);
+ if (wq->head)
+ pthread_cond_signal(&wq->cond);
  pthread_mutex_unlock(&wq->lock);
 
  item->work_handler(item);