 07 May 2009, Konstantin Olchanski, Info, RPC.SHM gyration
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When using remote midas clients with mserver, you may have noticed the zero-size .RPC.SHM files
these clients create in the directory where you run them. These files are associated with the semaphore
created by the midas rpc layer (rpc_call) to synchronize rpc calls between multiple threads. This
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07 May 2009, Konstantin Olchanski, Info, mhttpd now uses mtransition
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mhttpd function for starting and stopping runs now uses cm_transition(DETACH) which spawns an
external helper program called mtransition to handle the transition sequencing. This helps with the old
problem of looking at a blank screen for a long time if some frontends take a long time to process run
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07 May 2009, Konstantin Olchanski, Bug Fix, mhttpd "Names" length
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mhttpd did not like it when the equipment "Names" arrays had different length compared to the
corresponding "Variables" arrays. These limitations are now removed.
svn rev 4469
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07 May 2009, Konstantin Olchanski, Bug Fix, Fixed mlogger run start and stop
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Fixed problems with mlogger starting and stopping runs.
Basic difficulty was with the mlogger using ASYNC transitions, which did not implement proper
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07 May 2009, Konstantin Olchanski, Info, SQL history documentation
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Documentation for writing midas history data to SQL (mysql) is now documented in midas doxygen files
(make dox; firefox doxfiles/html/index.html). The corresponding logger and mhttpd code has been
committed for some time now and it is used in production environment by the t2k/nd280 slow controls
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07 May 2009, Konstantin Olchanski, Bug Report, odbedit bad ctrl-C
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When using "/bin/bash" shell, if I exit odbedit (and other midas programs) using ctrl-C, the terminal
enters a funny state, "echo" is turned off (I cannot see what I type), "delete" key does not work (echoes
^H instead).
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07 May 2009, Konstantin Olchanski, Bug Report, mlogger duplicate event problem
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We have seen on several daq systems this problem: we start a run and observe that the number of
events written by mlogger to the output file is double the number of events actually collected. Upon
inspection of the output file, we see that every event is written twice. Restarting the run usually fixes
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 15 May 2009, Konstantin Olchanski, Info, midas misc timeout fixes
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> - cm_transition() timeouts now settable from ODB (/experiment/transition timeout, transition connect timeout). Rev 4479
transition connect timeout was actually only half of that specified because of an error in computing timeout arguments to the select() system
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15 May 2009, Konstantin Olchanski, Info, midas misc timeout fixes
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> - cm_transition() timeouts now settable from ODB (/experiment/transition timeout, transition connect timeout). Rev 4479
transition connect timeout was actually only half of that specified because of an error in computing timeout arguments to the select() system
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19 May 2009, Konstantin Olchanski, Suggestion, Question about using mvmestd.h
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> The problem is: I renamed my SIS1100 devices as /dev/sis1100/xxxxx. So I have to hack the
"sis3100.c".
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21 May 2009, Konstantin Olchanski, Info, mhttpd now uses mtransition
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> mhttpd function for starting and stopping runs now uses cm_transition(DETACH) which spawns an
> external helper program called mtransition to handle the transition sequencing.
>
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02 Jun 2009, Konstantin Olchanski, Info, mhttpd now uses mtransition
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> > mhttpd function for starting and stopping runs now uses cm_transition(DETACH) which spawns an
> > external helper program called mtransition to handle the transition sequencing.
>
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02 Jun 2009, Konstantin Olchanski, Bug Report, mlogger duplicate event problem
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> We have seen on several daq systems this problem: we start a run and observe that the number of
> events written by mlogger to the output file is double the number of events actually collected. Upon
> inspection of the output file, we see that every event is written twice. Restarting the run usually fixes
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02 Jun 2009, Konstantin Olchanski, Info, RPC.SHM gyration
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> When using remote midas clients with mserver, you may have noticed the zero-size .RPC.SHM files
> these clients create in the directory where you run them. These files are associated with the semaphore
> created by the midas rpc layer (rpc_call) to synchronize rpc calls between multiple threads. This
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03 Jun 2009, Konstantin Olchanski, Bug Fix, Fix db_open_record() error return
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The odb hot-link function db_open_record() did not return an error when the system limit for hotlinks is
exceeded and no more hot links could be added (silent failure). This is now fixed.
odb.c svn rev 4500
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05 Jun 2009, Konstantin Olchanski, Bug Report, mhttpd command line experiment specifying
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> I guess you have to do some debugging there. Note that "detached" transitions have
> been implemented recently by Konstantin, so maybe your problem is related to that.
> In this case Konstantin should check what's wrong.
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16 Jun 2009, Konstantin Olchanski, Bug Report, mlogger duplicate event problem
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> > We have seen on several daq systems this problem: we start a run and observe that the number of
> > events written by mlogger to the output file is double the number of events actually collected. Upon
> > inspection of the output file, we see that every event is written twice. Restarting the run usually fixes
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18 Jun 2009, Konstantin Olchanski, Bug Report, mhttpd command line experiment specifying
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> > I guess you have to do some debugging there. Note that "detached" transitions have
> > been implemented recently by Konstantin, so maybe your problem is related to that.
> > In this case Konstantin should check what's wrong.
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24 Jun 2009, Konstantin Olchanski, Bug Report, TR_STARTABORT transition, mlogger duplicate event problem
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> > > We have seen on several daq systems this problem: we start a run and observe that the number of
> > > events written by mlogger to the output file is double the number of events actually collected. Upon
> > > inspection of the output file, we see that every event is written twice. Restarting the run usually fixes
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25 Jun 2009, Konstantin Olchanski, Bug Report, TR_STARTABORT transition, mlogger duplicate event problem
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> > Stefan suggested implementing a new transition, TR_STARTABORT, issued if TR_START fails. mlogger can use it to cleanup open files, etc, similar to TR_STOP.
> >
> > This is now implemented. In mlogger, TR_STARTABORT is similar to TR_STOP, but deletes open output files and does not save end-of-run information into |