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Subject: Re: Increasing scan rate to 10 kHz
From: Eric Norum <[email protected]>
To: Evgeniy <[email protected]>
Cc: EPICS Tech Talk <[email protected]>
Date: Wed, 27 Nov 2013 11:41:31 -0800
On Nov 27, 2013, at 11:29 AM, Evgeniy <[email protected]> wrote:

> Thanks, Andrew and Emmanuel for your replies.
> 
> I am running Soft IOC on Dell server (64 bit) with eight  Intel Xeon CPUs, each  2.27GHz.
> It seems that syntax for dbd file is correct. I found that minimum scan period for my system is 0.001 seconds. For shorter periods it falls down to 0.1 second, as Andrew mentioned.
> The difference in one CPU usage is only 5% if I run records with scan 0.1 second or 0.001 second. It looks like it is limitation of EPICS, not hardware.
Or perhaps the kernel timer implementation has a resolution of 1 ms?
>  What is the bottleneck for processing of a record on GHz CPUs?
> Is it possible to improve it?
> 
> Evgeniy

-- 
Eric Norum
[email protected]






Replies:
Re: Increasing scan rate to 10 kHz Evgeniy
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

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