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

Subject: Re: Rogue process variables
From: Ralph Lange <Ralph.Lange@bessy.de>
To: EPICS tech-talk <tech-talk@aps.anl.gov>
Date: Fri, 21 May 2010 09:31:44 -0400
Whooops, cainfo indeed *does* it.

> cainfo fred
fred
   State:         connected
   Host:          nsls2rlange.nsls2.bnl.gov:5064
   Access:        read, write
   Data type:     DBR_DOUBLE (native: DBF_DOUBLE)
   Element count: 1

Note, though, that - depending on the performance of network, client and host machines, and the DNS configuration and status - when Channel Access does the connection callback, the host name may not be available yet.
cainfo waits for the connection callbacks, then calls ca_host_name() to get the host name. If Channel Access returns an empty string, cainfo prints it.


Doing "PV info" from a medm screen does basically the same thing, but pointing the mouse at the widget and doing the right click leaves enough time for CA and DNS to have the host name ready when medm wants it.

See https://bugs.launchpad.net/epics-base/+bug/541342 for an explanation and the fix that was applied to 3.14.10
(Mark, do you still see this on 3.14.10 or later? If so, you probably should reopen the issue.)


Cheers,
Ralph


On Thu 20 May 2010 20:20:26 Mark Rivers wrote:
Whoops, cainfo does not do it.

But make an medm screen with a widget for that PV, and then right click
and select "PV info".

That will give you the name of the IOC machine.

Mark


-----Original Message----- From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Mark Rivers Sent: Thursday, May 20, 2010 7:16 PM To: emmanuel_mayssat@lynceantech.com; EPICS tech-talk Subject: RE: Rogue process variables

base/bin/linux-x86/cainfo PVName

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov
[mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of
emmanuel_mayssat@lynceantech.com
Sent: Thursday, May 20, 2010 7:15 PM
To: EPICS tech-talk
Subject: Rogue process variables

Hello all,

I have an IOC running somewhere on the network.
I can see the PV, but cannot find the ioc process.
Is there a way from a terminal to find out on which computer/port PVs are available?


Thanks,


Replies:
RE: Rogue process variables Mark Rivers
References:
Rogue process variables emmanuel_mayssat
RE: Rogue process variables Mark Rivers
RE: Rogue process variables Mark Rivers

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