Re: Increasing scan rate to 10 kHz

[Eric Norum <eric@norum.ca>]

On Nov 27, 2013, at 11:29 AM, Evgeniy <tikh@triumf.ca> 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
eric@norum.ca