Experimental Physics and Industrial Control System
|
On Oct 11, 2007, at 4:05 AM, Benjamin Franksen wrote:
I agree with Mark and Eric. It may not be a problem in /most/
situations if
interrupt are lost. However, there may be cases where this is a
problem. I
can imagine a card wants to acknowlege completion of a long runnign
operation by issuing an interrupt. If multiple channels per card are
involved, and each one gets its own completion interrupt, we'll have a
problem indeed. Always remember Murphy's law ;-)
BTW, if solution 2 gets implemented, I'd make sure the interrupt
queue size
can be configured by the user.
I think that Mark's proposal 2 makes no changes to the way interrupt-
level code passes information to the ASYN callback thread. If I
understand properly, what he is proposing is to have the ASYN
callback thread lock the record and process the record directly
rather than having a scanIOrequest callback thread to do this work.
Thus your request for a configurable interrupt queue is somewhat
orthogonal to the topic although I agree that it is a good idea to
provide configurable sizes to interrupt handlers which use message
queues.
--
Eric Norum <[email protected]>
Advanced Photon Source
Argonne National Laboratory
(630) 252-4793
- Replies:
- RE: ASYN - calling read after interrupt - fix :) Mark Rivers
- References:
- RE: ASYN - calling read after interrupt - fix :) Mark Rivers
- RE: ASYN - calling read after interrupt - fix :) Heinrich du Toit
- Re: ASYN - calling read after interrupt - fix :) Benjamin Franksen
- Navigate by Date:
- Prev:
Re: firewire video on RTEMS-4.6.x-MVME5500 Kate Feng
- Next:
RE: firewire video on RTEMS-4.6.x-MVME5500 Mark Rivers
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
<2007>
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
Re: ASYN - calling read after interrupt - fix :) Benjamin Franksen
- Next:
RE: ASYN - calling read after interrupt - fix :) Mark Rivers
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
<2007>
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|
ANJ, 10 Nov 2011 |
·
Home
·
News
·
About
·
Base
·
Modules
·
Extensions
·
Distributions
·
Download
·
·
Search
·
EPICS V4
·
IRMIS
·
Talk
·
Bugs
·
Documents
·
Links
·
Licensing
·
|