Experimental Physics and Industrial Control System
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On 10/09/2017 09:26 AM, Ralph Lange
wrote:
I don't know.
I would expect the user tag to come from a different source
than the wall clock time, and be assembled into the NT
timeStamp structure.
In the NT discussion we expected 32 bits to be good enough
for a user tag. More than four billion different values for a
tag seem plenty.
Note also that it is defined to be a signed 32 bit value rather than
unsigned.
Marty
In general, the NT types were discussed, reviewed and set
over years. I would not expect to see them changed on an
ad-hoc basis.
Not saying that this specific tag should not be 64 bits
wide, but to change an existing approved design, I would like
to see a minimum amount of justification and discussion.
Cheers,
~Ralph
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- Replies:
- Re: Adding userTag to epicsTimeStamp Ralph Lange
- RE: Adding userTag to epicsTimeStamp Mark Rivers
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- Adding userTag to epicsTimeStamp Johnson, Andrew N.
- Re: Adding userTag to epicsTimeStamp Ralph Lange
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ANJ, 21 Dec 2017 |
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