RE: cygwin and DOS caget, caput running slow at end due to ca_context_destroy(), option to speed up execution?

["Jeff Hill" <johill@lanl.gov>]

Hi Jay,

 

I don’t see this either, but I am using only win32-x86 and win32-x86-mingw on my windows machines. The cygwin posix emulation adds some additional layers around windows sockets to obtain posix compatibility.

 

Ø  the majority of the execution time (4-5 seconds) seems to be spent running the ca_context_destroy function

 

The ca_context_destroy will wait for the tcp circuit shutdown handshake to finish before returning. You can watch this with netstat or in GUIs like, for example on windows, tcpview. The GUI might update the tcp state machine changes more rapidly as they are occurring.

 

Jeff

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Jeffrey O. Hill           Email        johill@lanl.gov
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From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Jay Steele
Sent: Wednesday, February 16, 2011 1:00 PM
To: tech-talk@aps.anl.gov
Subject: cygwin and DOS caget, caput running slow at end due to ca_context_destroy(), option to speed up execution?

 

Hi EPICS folks,

      I’m running caget and caput utility functions from cygwin and DOS on a Windows XP system to get and put data to a VxWorks IOC on the same subnet. I would like to know if there is some option to help speed up the execution of these utility functions. For both sets of utility functions, the majority of the execution time (4-5 seconds) seems to be spent running the ca_context_destroy function at the end. I don’t see this delay when running caget and caput functions to get and put data to a Soft IOC running on the same Windows XP computer. I don’t understand why there is such a delay just to clean up at the end.

 

     I’m using epics base v3-14-11 for cygwin and EPICS WIN32 Extensions Version 1.40 (Build 40) for DOS.

 

Thanks,

Jay Steele

Xradia Corporation

 

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