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<== Date ==> <== Thread ==>

Subject: Re: Increasing scan rate to 10 kHz
From: Andrew Johnson <anj@aps.anl.gov>
To: <tech-talk@aps.anl.gov>
Date: Wed, 18 Dec 2013 14:04:54 -0600
Hi Evgeniy,

On 12/18/2013 01:07 PM, Evgeniy wrote:
> Processing of an EPICS record takes ~2 milliseconds on my SL5.3/DELL
> 2.27 GHz. It is unbelievably slow!

How are you measuring that?  There is a problem with your measurement
methodology, as Mark Rivers has shown. How long it actually takes to
process a record is *not* the same as how often you can trigger it to
process, since the latter depends on what method you are using to
trigger its processing.  Trying to create a very fast periodic thread is
never going to be an efficient way to make a record process very quickly.

You are likely to get more help from us here on tech-talk if you can
step back and explain what you are trying to achieve, i.e. give us the
big picture problem, not your current specific detail problem, because I
think you may be heading in the wrong direction.

- Andrew

-- 
Advertising may be described as the science of arresting the human
intelligence long enough to get money from it. -- Stephen Leacock

References:
Increasing scan rate to 10 kHz Evgeniy
Re: Increasing scan rate to 10 kHz Andrew Johnson
Re: Increasing scan rate to 10 kHz Evgeniy
Re: Increasing scan rate to 10 kHz Eric Norum
Re: Increasing scan rate to 10 kHz Evgeniy

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