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

Subject: RE: No monitor refresh
From: "Mark Rivers" <rivers@cars.uchicago.edu>
To: "Hinko Kocevar" <hinko.kocevar@i-tech.si>, "Ralph Lange" <Ralph.Lange@bessy.de>
Cc: tech-talk@aps.anl.gov
Date: Tue, 11 May 2010 16:24:46 -0500
>> When you do intermediate cagets while your camonitor is not getting
>> updates, what timestamps are these showing?

> They seem to be showing some old timestamp - e.g. few hours back,
while
> it should show current date&time stamp.

That really suggests that your record is not processing, i.e. that the
problem is not with Channel Access callbacks to clients, but with
callbacks from your driver to device support.

>> Are you sure asyn gets the value you expect it to into the record?
>> (Check by enabling asyn debug.)

> I've checked the status of the low level stuff (kernel driver and
> hardware) and the new value is there..

But you didn't answer the question: does the RECORD have the correct
value?  Do a "dbpr" on the record at the IOC prompt.  If the record does
not have the correct value then the problem is not with Channel Access
callbacks, it is with asyn callbacks from your driver to the record.

You should probably put some printf calls in your driver where it does
the interrupt callbacks, and/or in devAsynInt32.c where it gets
interrupt callbacks from the driver.

Mark

-----Original Message-----
From: tech-talk-bounces@aps.anl.gov
[mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Hinko Kocevar
Sent: Tuesday, May 11, 2010 11:01 AM
To: Ralph Lange
Cc: tech-talk@aps.anl.gov
Subject: Re: No monitor refresh

Hello Ralph,

On 05/11/10 16:47, Ralph Lange wrote:
> Hello Hinko,
> 
> hm ..... it's an I/O scanned mbbi connected to asyn, and I have no
asyn
> experience. (So I'm sort of out-of-the-game at this point.)

Yes it is a record defined like this:

record(mbbi, "$(DEVICE)ENV_AGC_MONITOR") {
	field(DTYP, "asynInt32")
	field(INP, "@asyn($(PORT), 725, 1.0)")
	field(SCAN, "I/O Intr")
	field(DESC, "AGC")
	field(ZRVL, "0")
	field(ONVL, "1")
	field(ZRST, "MANUAL")
	field(ONST, "AUTO")
	field(PINI, "YES")
}

record(mbbo, "$(DEVICE)ENV_AGC_SP") {
	field(DTYP, "asynInt32")
	field(OUT, "@asyn($(PORT), 725)")
	field(DESC, "AGC")
	field(ZRVL, "0")
	field(ONVL, "1")
	field(ZRST, "MANUAL")
	field(ONST, "AUTO")
	field(PINI, "YES")
}

ENV_AGC_MONITOR is used with camonitor, ENV_AGC_SP is used with
caget/caput. When I set the value with ENV_AGC_SP, ENV_AGC_MONITOR
should refresh the value.

> 
> Nevertheless - some thoughts:
> Your NOBT is zero, but your mask is correct, probably something that
> asyn does for you.
> Looked at the record code: An mbbi should definitely send VAL updates
> when it processes and the value changed.

Yes it should, but this does not happen always.

> Are you sure asyn gets the value you expect it to into the record?
> (Check by enabling asyn debug.)

I've checked the status of the low level stuff (kernel driver and
hardware) and the new value is there..

> Are you sure the record gets processed by asyn when you expect it to?
> (Check by setting the trace field.)

I want it to react as soon as the value in hardware changes - hence the
I/O scanning. Hmm, maybe I could try some other Periodic scans to see if
it helps..

Will try the asyn debug and traces too..

> When you set up multiple camonitor clients - do they all behave the
same?

Yes, they do.

I've also tried running camonitor on several clients, even locally on
the IOC server itself (ARM cross compiled), but without any success. It
seems to me that EPICS TCP transport layer is not reacting to the change
!?

> When you do intermediate cagets while your camonitor is not getting
> updates, what timestamps are these showing?

They seem to be showing some old timestamp - e.g. few hours back, while
it should show current date&time stamp.

> (BTW: You only have two states with raw values 0 and 1 defined - any
> particular reason for using mbbi as opposed to bi?)

No particular reason at all.. :)

> 
> Someone with more asyn background could probably say more....


Thank you for the valuable pointers!

Best regards,
Hinko


> 
> Good luck!
> Ralph
> 
> 
> On Tue 11 May 2010 10:07:12 Hinko Kocevar wrote:
>> Hello Ralph,
>>
>> On 05/11/10 15:21, Ralph Lange wrote:
>>  
>>> Hello Hinko,
>>>
>>> what EPICS versions are you using for client and IOC?
>>>     
>>
>> IOC and client use 3.14.10 EPICS base version.
>>
>>  
>>> Can you show a dump (dbpr <name>, 4) of the record that you are
>>> connecting to?
>>>     
>>
>> Sure, here it is:
>> epics> dbpr LIBERA01:ENV:ENV_AGC_MONITOR 4
>> ACKS: NO_ALARM      ACKT: YES           ASG:                ASP:
>> 0x00000000
>> BKPT: 0x00          COSV: NO_ALARM      DESC: AGC           DISA: 0
>>
>> DISP: 0             DISS: NO_ALARM      DISV: 1             DPVT:
>> 0x50c72c00
>> DSET: 0x7c620840    DTYP: asynInt32     EIST:               EISV:
>> NO_ALARM
>> EIVL: 0x0           ELST:               ELSV: NO_ALARM      ELVL: 0x0
>>
>> EVNT: 0             FFST:               FFSV: NO_ALARM      FFVL: 0x0
>>
>> FLNK:CONSTANT 0     FRST:               FRSV: NO_ALARM      FRVL: 0x0
>>
>> FTST:               FTSV: NO_ALARM      FTVL: 0x0           FVST:
>>
>> FVSV: NO_ALARM      FVVL: 0x0           INP:INST_IO @asyn(ENV, 725,
1.0)
>>
>> LALM: 1             LCNT: 0             LSET: 0xe8752e00    MASK:
>> 4294967295
>> MLIS: 0x38d0320060d0320003000000        MLOK: 0x28700b00    MLST: 1
>>
>> NAME: LIBERA01:ENV:ENV_AGC_MONITOR      NIST:               NISV:
>> NO_ALARM
>> NIVL: 0x0           NOBT: 0             NSEV: NO_ALARM      NSTA:
>> NO_ALARM
>> ONST: AUTO          ONSV: NO_ALARM      ONVL: 0x1           ORAW: 1
>>
>> PACT: 0             PHAS: 0             PINI: YES           PPN:
>> 0x00000000
>> PPNR: 0x00000000    PRIO: LOW           PROC: 0             PUTF: 0
>>
>> RDES: 0xa8a10300    RPRO: 0             RSET: 0x34b70a40    RVAL: 1
>>
>> SCAN: I/O Intr      SDEF: 1             SDIS:CONSTANT       SEVR:
>> NO_ALARM
>> SHFT: 0             SIML:CONSTANT       SIMM: NO            SIMS:
>> NO_ALARM
>> SIOL:CONSTANT       SPVT: 0x388a2f00    STAT: NO_ALARM      SVAL: 0
>>
>> SVST:               SVSV: NO_ALARM      SVVL: 0x0           SXST:
>>
>> SXSV: NO_ALARM      SXVL: 0x0           TEST:               TESV:
>> NO_ALARM
>> TEVL: 0x0           THST:               THSV: NO_ALARM      THVL: 0x0
>>
>> TIME: 2010-05-11 11:18:40.100440000     TPRO: 0             TSE: 0
>>
>> TSEL:CONSTANT       TTST:               TTSV: NO_ALARM      TTVL: 0x0
>>
>> TVST:               TVSV: NO_ALARM      TVVL: 0x0           TWST:
>>
>> TWSV: NO_ALARM      TWVL: 0x0           UDF: 0              UNSV:
>> NO_ALARM
>> VAL: 1              ZRST: MANUAL        ZRSV: NO_ALARM      ZRVL: 0x0
>>
>>
>>  
>>> What field of that record are you connecting to?
>>>     
>>
>> I did no specify any field - so it is VAL, I guess by default.
>>
>> Thank you!
>>
>> Regards,
>> Hinko
>>
>>  
>>> Regards,
>>> Ralph
>>>
>>>
>>> On Tue 11 May 2010 6:26:48 Hinko Kocevar wrote:
>>>    
>>>> Hi all,
>>>>
>>>> I'm experiencing some strange behavior when using camonitor against
an
>>>> EPICS IOC.
>>>>
>>>> For some reason a CA_PROTO_EVENT_ADD response from IOC to CA client
>>>> does
>>>> not arrive, or arrives several minutes later after the PV value has
>>>> changed. Note that first CA_PROTO_EVENT_ADD response is seen
always,
>>>> only latter CA_PROTO_EVENT_ADD responses do not arrive (or arrive
>>>> late)?!
>>>> This behavior is not seen always - sometimes the IOC would promptly
>>>> respond with CA_PROTO_EVENT_ADD response when needed.
>>>>
>>>> I can see the CA_PROTO_ECHO requests/responses fine on the same
>>>> camonitor channel link, only CA_PROTO_EVENT_ADD response is not
seen.
>>>>
>>>> Inspecting the IOC I can see that the value did change (on lower
>>>> levels)
>>>> and caput response is also valid - updated with new value.
>>>>
>>>> I've ruled out the network problems, since the issue is raised even
>>>> when
>>>> using cross-over cable to communicate with the IOC. Actually even I
>>>> update the value in the IOC shell, the camonitor is not refreshed!!
>>>>
>>>>
>>>>
>>>> Has someone experienced something similar?
>>>> Are there some conditions that need to fulfilled in order for IOC
to
>>>> send a subsequent CA_PROTO_EVENT_ADD response(s)?
>>>>
>>>>
>>>>
>>>> TIA & HAND,
>>>> Hinko
>>>>       
>>
>>
>>   


-- 
Hinko Kocevar
Technical support software engineer
Instrumentation Technologies
Velika pot 22, SI-5250 Solkan - Slovenia
T:+386 5 3352600, F:+386 5 3352601
mailto: hinko.kocevar@i-tech.si

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Replies:
Re: No monitor refresh Hinko Kocevar
References:
Re: No monitor refresh Ralph Lange
Re: No monitor refresh Hinko Kocevar

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