Comments (6)
tacaswell
commented on June 12, 2024
1
Try passing a unique alarm_group='xyz' to each of the PVs
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tacaswell
commented on June 12, 2024
Just to confirm, you commented out the other two stats and the behavior went away?
My concern is that because you are setting the value the alarm state I wonder if we are not correctly de-bouncing something and the 2 extra messages are from that (not the other two PVs)?
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cjtitus
commented on June 12, 2024
Yes, if you comment out writes one by one, you get successively less
duplication. I copied most of this from the mirror ioc example so I haven't
thought about the alarm states at all. Would be good to try to cut that out
and see if it goes away.
I don't know if I mentioned that the duplication is visible for every PV
you monitor, not just the first one.
…On Sun, Nov 6, 2022, 00:42 Thomas A Caswell ***@***.***> wrote:
Just to confirm, you commented out the other two stats and the behavior
went away?
My concern is that because you are setting the value the alarm state I
wonder if we are not correctly de-bouncing something and the 2 extra
messages are from that (not the other two PVs)?
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tacaswell
commented on June 12, 2024
or filtering your monitor to value only (no alarm updates).
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klauer
commented on June 12, 2024
I think it's almost certainly as @tacaswell indicates - the alarm group is causing the other two to send updates.
caproto's handling of alarm updates could definitely be improved here. Something like only causing the linked alarm group to publish if the status/severity differ from the current setting:
Lines 708 to 709 in 57e0c56
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cjtitus
commented on June 12, 2024
Indeed, taking out the status kwarg from the write calls stops the duplication. Seems to be it.
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