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|  13 Jan 2021, Isaac Labrie Boulay, Forum, poll_event() is very slow. |  |  13 Jan 2021, Konstantin Olchanski, Forum, poll_event() is very slow. |  |  15 Jan 2021, Isaac Labrie Boulay, Forum, poll_event() is very slow. |  |  13 Jan 2021, Stefan Ritt, Forum, poll_event() is very slow. |  |  14 Jan 2021, Pintaudi Giorgio, Forum, poll_event() is very slow. |  |  14 Jan 2021, Isaac Labrie Boulay, Forum, poll_event() is very slow. |  |  08 Feb 2021, Konstantin Olchanski, Forum, poll_event() is very slow. |  | 
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| Message ID: 2076
    Entry time: 14 Jan 2021
    In reply to: 2074
    Reply to this: 2084 |  | | Author: | Isaac Labrie Boulay |  | Topic: | Forum |  | Subject: | poll_event() is very slow. | 
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| > Something must be wrong on your side. If you take the example frontend under
> 
> midas/examples/experiment/frontend.cxx
> 
> and let it run to produce dummy events, you get about 90 Hz. This is because we have a
> 
>   ss_sleep(10);
> 
> in the read_trigger_event() routine to throttle things down. If you remove that sleep, 
> you get an event rate of about 500'000 Hz. So the framework is really quick.
> 
> Probably your routine which looks for a 'lam' takes really long and should be fixed.
> 
> Stefan
Hi Stefan,
I should mention that I was using midas/examples/Triumf/c++/fevme.cxx. I was trying to see 
the max speed so I had the 'lam' always = 1 with nothing else to add overhead in the 
poll_event(). I was getting <200 Hz. I am assuming that this is a bug. There is no 
ss_sleep() in that function.
Thanks for your quick response!
Isaac |