[erlang-questions] Timers for hibernated processes

Barco You barcojie@REDACTED
Wed Nov 23 04:30:49 CET 2011

I wonder what the difference is between using erlang:start_timer(Timeout,
Pid, Msg) and directly using the receive-after clause as below:

       _Event -> ok
       Timeout -> Pid ! Msg

On Wed, Nov 23, 2011 at 7:20 AM, Scott Lystig Fritchie <
fritchie@REDACTED> wrote:

> Jesper Louis Andersen <jesper.louis.andersen@REDACTED> wrote:
> jla> In *principle* this kind of structure should be extremely
> jla> scalable. I would try reconstructing the problem without any kind
> jla> of other subsystem (TCP, Cowboy, ...) first, so you have a smaller
> jla> failing test case. Then you can probably instrument Erlang/OTP by
> jla> inspecting the Timer wheel. This will probably tell us a lot more
> jla> about the limitations of the timer wheel structure in this case.
> Sounds like an excellent use of DTrace, hint hint.....
> The hints aren't just for Jesper and Zvi but anyone else who's intersted
> in measuring the behavior of stuff inside the Erlang VM.  This stuff is
> working its way into (we hope!) R15B right now.  To read more about it,
> see:
> http://www.snookles.com/slf-blog/2011/11/19/dtrace-and-erlang-a-status-report/
> http://www.snookles.com/slf-blog/2011/11/19/systemtap-and-erlang-a-tutorial/
> -Scott
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