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

Subject: [Bug 1861612] Re: callbackRequestDelay not waiting for 1/60 sec on vxWorks
From: rivers via Core-talk <core-talk at aps.anl.gov>
To: core-talk at aps.anl.gov
Date: Mon, 03 Feb 2020 19:55:37 -0000
This is 30 Hz.

updateCounts: posting scaler values counts[0]=343492
updateCounts: posting scaler values counts[0]=842531
updateCounts: posting scaler values counts[0]=1342611
updateCounts: posting scaler values counts[0]=1842512
updateCounts: posting scaler values counts[0]=2342578
updateCounts: posting scaler values counts[0]=2842581
updateCounts: posting scaler values counts[0]=3342583
updateCounts: posting scaler values counts[0]=3842498
updateCounts: posting scaler values counts[0]=4342557
updateCounts: posting scaler values counts[0]=4842722

So the average delta is (4842722-343492)/9.=499914 = 50 ms, should be 33
ms.

epicsThreadSleepQuantum=0.016667
epicsMonotonicResolution=40

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https://bugs.launchpad.net/bugs/1861612

Title:
  callbackRequestDelay not waiting for 1/60 sec on vxWorks

Status in EPICS Base:
  New

Bug description:
  The problem is documented in this tech-talk thread:
  https://epics.anl.gov/tech-talk/2020/msg00308.php

  In 7.0.3.1, but not in 7.0.3, callbackRequestDelay(1/60) results in
  100% CPU time, most of the time in cbHigh.

  This happens on vxWorks 6.9.4.1 and was first seen with the scaler
  record with multiple types of scaler hardware and device support.

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References:
[Bug 1861612] [NEW] callbackRequestDelay not waiting for 1/60 sec on vxWorks rivers via Core-talk

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