[sheepdog] [PATCH v2 09/10] sheep: add event_loop checker

[MORITA Kazutaka]

At Fri, 9 Aug 2013 12:26:22 +0800,
Liu Yuan wrote:
> 
> On Fri, Aug 09, 2013 at 12:22:03PM +0900, MORITA Kazutaka wrote:
> > From: MORITA Kazutaka <morita.kazutaka at lab.ntt.co.jp>
> > 
> > We shouldn't spend too much time in the main thread.  This checker
> > prints a warning message when sheep uses more than 1 ms in the main
> > thread.
> 
> I can just get
> 
> Aug 09 11:49:14 [main] event_handler_exit(45) timer_handler wastes too much time in event loop: 1506.979 us
> 
> notice, any chance that we include who is the culprit?

Enabling graph tracer and reproducing the problem is not enough?
Perhaps, it'd be better to check all the function internal
event_loop().

I've also noticed that event_loop() can be a bottleneck when we
requests a large data like 4 MB.  I think of focusing on the problem
in the next development cycle.

Thanks,

Kazutaka