Experimental Physics and
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<== Date ==>		<== Thread ==>

Subject:	Re: recDynLink.c and swait.c error messaged during ioc start
From:	"Mooney, Tim M. via Tech-talk" <tech-talk at aps.anl.gov>
To:	"tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, "Gofron, Kazimierz" <kgofron at bnl.gov>
Date:	Wed, 4 May 2022 21:46:04 +0000

You should increase the value of recDynLinkQsize.

Tim Mooney (mooney at anl.gov) (630)252-5417
Beamline Controls Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Gofron, Kazimierz via Tech-talk <tech-talk at aps.anl.gov>
Sent: Wednesday, May 4, 2022 4:09 PM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: recDynLink.c and swait.c error messaged during ioc start

Hi,

I've been working on EPICS pid ioc for temperature control, that uses Wiener power supply and Keithly 3706A PT1000 sensors scanner.

Recently we updated RHEL8.5 kernel, and I noticed that ioc shows errors since end of April 2022. Update might not be related to OS update. I might also be missing something in the dependency. Perhaps someone observed this before.

## EPICS R7.0.6
## Rev. R7.0.6

OS: RHEL8.5

During ioc startup, getting error messages from

sscan: / recDynLink.c : 549

    precDynLink->onQueue++;

    if (epicsMessageQueueTrySend(recDynLinkOutMsgQ, (void *)&cmd,
sizeof(cmd))) {
        errMessage(0,"recDynLinkPut: epicsMessageQueueTrySend error");
        status = RINGBUFF_PUT_ERROR;
        precDynLink->onQueue--;
    }

calc: / swait.c : 838/840

    recDynLinkGet(precDynLink, &monData, &nRequest,
0, 0,
0);     if (swaitRecordDebug>5)
        errlogPrintf("swaitRecord(%s)inputChanged: queuing monitor on
%d = 
%f\n",pwait->name,index,monData);
    if (epicsRingBytesPut(pcbst->monitorQ, (char *)&index,
sizeof(char))
        != sizeof(char))
errMessage(0,"recWait rngBufPut error");
    if (epicsRingBytesPut(pcbst->monitorQ, (char *)&monData,
sizeof(double))
        != sizeof(double))
errMessage(0,"recWait rngBufPut error");
    if (swaitRecordDebug>5) {
        errlogPrintf("swaitRecord(%s)inputChanged:
%d entries left in monitorQ\n",
pwait->name,
            (int)(epicsRingBytesFreeBytes(pcbst->monitorQ)/sizeof(struct qStruct)));
    }

calc: / swait.c: 870/872

    if (!swaitRecordCacheMode) {        if (epicsRingBytesGet(pcbst->monitorQ, (char *)&inputIndex,
sizeof(char))
            != sizeof(char))
errMessage(0,
"recWait: rngBufGet error");
        if (epicsRingBytesGet(pcbst->monitorQ, (char *)&monData,
sizeof(double))
            != sizeof(double))
errMessage(0,
"recWait: rngBufGet error");

=========================

epics> filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

filename="../recDynLink.c" line number=549

recDynLinkPut: epicsMessageQueueTrySend error

ioc_settings.sav: 1575 of 1575 PV's connected

errlog: 34 messages were discarded