Experimental Physics and Industrial Control System
That appears to be my fault, I'm very sorry about that. Bug 701673 is a
revert of this commit:
http://bazaar.launchpad.net/~michael-abbott/epics-base/dynamic-array/revision/12076
Unfortunately I'm rusty enough that I can't see the error right now, and
I'm tied up away from the office for a few days now. Thanks very much for
finding and fixing this.
I don't remember at all why that commit was created in the first place, as
it seems rather pointless really.
I guess this shows the hazards of working on a code base very part time :(
On Wed, 12 Jan 2011, Mark Rivers wrote:
> Hi Jeff,
>
> Thanks for the quick response. I installed the patch and it fixes the problem.
>
> Mark
>
>
> ________________________________
>
> From: [email protected] on behalf of Jeff Hill
> Sent: Wed 1/12/2011 5:21 PM
> To: [email protected]
> Subject: RE: large arrays native element count wrong with Channel Access inEPICS 3.14.12
>
>
>
> I committed a fix to the R3.14 branch. An overzealous optimization was
> installed. See bug 701673 at launchpad for the details.
>
> https://bugs.launchpad.net/epics-base/+bug/701673
>
> Jeff
> ______________________________________________________
> Jeffrey O. Hill Email [email protected]
> LANL MS H820 Voice 505 665 1831
> Los Alamos NM 87545 USA FAX 505 665 5107
>
> Message content: TSPA
>
> With sufficient thrust, pigs fly just fine. However, this is
> not necessarily a good idea. It is hard to be sure where they
> are going to land, and it could be dangerous sitting under them
> as they fly overhead. -- RFC 1925
>
>
> > -----Original Message-----
> > From: Jeff Hill [mailto:[email protected]]
> > Sent: Wednesday, January 12, 2011 9:27 AM
> > To: '[email protected]'
> > Subject: RE: Problem using large arrays with Channel Access in EPICS
> > 3.14.12
> >
> > Yes, there were two new features merged into CA for the R3.14.12 patch
> > release. I will have a look.
> >
> > PS: IMHO, we can consider that risk is reduced if only patches are merged
> > into patch releases. Perhaps new features are best placed in point
> > releases.
> >
> > Jeff
> > ______________________________________________________
> > Jeffrey O. Hill Email [email protected]
> > LANL MS H820 Voice 505 665 1831
> > Los Alamos NM 87545 USA FAX 505 665 5107
> >
> > Message content: TSPA
> >
> > With sufficient thrust, pigs fly just fine. However, this is
> > not necessarily a good idea. It is hard to be sure where they
> > are going to land, and it could be dangerous sitting under them
> > as they fly overhead. -- RFC 1925
> >
> >
> > > -----Original Message-----
> > > From: [email protected] [mailto:tech-talk-
> > > [email protected]] On Behalf Of Andrew Johnson
> > > Sent: Tuesday, January 11, 2011 2:43 PM
> > > To: [email protected]
> > > Subject: Re: Problem using large arrays with Channel Access in EPICS
> > > 3.14.12
> > >
> > > On Tuesday 11 January 2011 15:21:32 Till Straumann wrote:
> > > > Could be a limitation of the CA protocol
> > >
> > > No, this is as a result of changes in src/rsrv between 3.14.11 and
> > > 3.14.12
> > > because large arrays work fine in 3.14.11.
> > >
> > > We introduced two major new features in the latest release, CA over TCP
> > > and
> > > dynamic array sizing, and one of them (most probably the latter) has
> > > broken
> > > the correct reporting of the element count. The CA protocol solved the
> > > problem of only a having a 16 bit m_count field a long time ago, but it
> > > looks
> > > like that hack^H^H^H^Hsolution didn't get propagated into the latest
> > > code.
> > >
> > > - Andrew
> > > --
> > > If a man is offered a fact which goes against his instincts, he will
> > > scrutinize it closely, and unless the evidence is overwhelming, he will
> > > refuse to believe it. If, on the other hand, he is offered something
> > > which affords a reason for acting in accordance to his instincts, he
> > > will accept it even on the slightest evidence. -- Bertrand Russell
>
>
>
>
>
>
- Replies:
- RE: large arrays native element count wrong with Channel Access inEPICS 3.14.12 Jeff Hill
- References:
- Problem using large arrays with Channel Access in EPICS 3.14.12 Mark Rivers
- Re: Problem using large arrays with Channel Access in EPICS 3.14.12 Till Straumann
- Re: Problem using large arrays with Channel Access in EPICS 3.14.12 Andrew Johnson
- RE: large arrays native element count wrong with Channel Access in EPICS 3.14.12 Jeff Hill
- RE: large arrays native element count wrong with Channel Access inEPICS 3.14.12 Mark Rivers
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