Experimental Physics and
Industrial Control System

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

Subject:	Re: record processing time
From:	"Vishnu Patel" <[email protected]>
To:	"Mark Rivers " <[email protected]>
Cc:	techtalk <[email protected]>
Date:	14 Feb 2014 14:37:04 -0000

Hi,

In my application i am putting value on 4 output port lines simultaneously with dfanout record.

record (dfanout,"TEST:EVENT1-FOUT")

{

field(DESC, "stop all event simaltanously")

field(DOL, "TEST:WAIT-EVENT")

field(HOPR, "1")

field(LOPR, "0")

field(OMSL, "closed_loop")

field(OUTA, "TEST:OUT0-O PP")

field(OUTB, "TEST:OUT1-O PP")

field(OUTC, "TEST:OUT2-O PP")

field(OUTD, "TEST:OUT3-O PP")

}

"TEST:OUT0-O, TEST:OUT1-O, TEST:OUT2-O, and TEST:OUT3-O are 4 output record putting the values on output port lines.

The TEST:WAIT-EVENT is the taking value from User interface. 0 or 1.

I observed the delay between each output is approximately 50 micro second. so total delay from first to last PV is ~200 micro second.

The OS running the IOC is RHEL.

I would like to know this delay time is normal in EPICS or i can even get better with some mechanism.

Thank you

From: Mark Rivers <[email protected]>
Sent: Wed, 12 Feb 2014 20:39:16
To: Vishnu Patel <[email protected]>, "techtalk " <[email protected]>
Subject: Re: record processing time
The processing time depends of course on the record type and the CPU you are using. But it is typically on the order of a few microseconds.
________________________________
From: [email protected] [[email protected]] on behalf of Vishnu Patel [[email protected]]
Sent: Wednesday, February 12, 2014 8:16 AM
To: techtalk
Subject: record processing time

Hi,
I would like to know about time required for record processing.
In my application
When PV1 becomes 1 (scan I/O Intr.), process waveform record with FLNK and then first element value of waveform record is placed in PVx and second element value of waveform record is put in PVy with subArray record.

I would like to know, what is the process time of EPICS record processing?

Thank you

Vishnu

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Replies:: RE: record processing time Mark Rivers

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ANJ, 17 Dec 2015

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System