[sheepdog-users] wastes too much time in event loop

[Ruoyu]

The execution time is in micro-second and the threshold is set to 1000 
us only. Maybe it is not suitable for the situation.

BTW, why zk_event_handler is involved in trace module? Does anyone know 
about it?

-----

 From <wanglifeng0123 at 163.com>

Hi, All


          I create a 10 nodes' sheepdog cluster with zookeeper driver. My NIC and switch are all 10G, but the sheepdog log always warns "wastes too much time in event loop".
          Is it critical and what causes it?
       


          Please see the logs as follows:
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8284.683 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8216.925 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 11731.176 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8032.123 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8357.292 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8348.695 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8333.673 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 9003.643 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 10418.276 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 8237.292 us
Jul 23 15:18:03   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 10125.13  us
Jul 23 15:18:04   WARN [main] event_handler_exit(44) zk_event_handler wastes too much time in event loop: 51052.992 us
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