 25 Jun 2026, Konstantin Olchanski, Forum, midas forum elog updated
|
I updated the midas forum elog to the latest version from git: 083448f7
Also investigated elogd failure to start on reboot,
|
 25 Jun 2026, Konstantin Olchanski, Bug Report, incompatible ODB XML dumps
|
> I fixed that by not requiring the handle explicitly ...
>
> [it was...] an uncaught exception. If you do not want the abort, catch the exception.
|
|
25 Jun 2026, Konstantin Olchanski, Suggestion, Multithreaded deferred transitions
|
> Multithreaded transitions were introduced by KO in 2019. Please ask him to make deferred transitions work
> again or simply use non-multithreaded transitions.
|
|
08 Jul 2026, Konstantin Olchanski, Suggestion, mlogger MySQL improved connection
|
you can also copy the reconnect code from history_schema.cxx.
if I remember right, the test case for correct reconnect is to start the mlogger,
|
|
08 Jul 2026, Konstantin Olchanski, Suggestion, Multithreaded PySequencer
|
> I was wondering if one can use multiple pysequencers at the same time and if not
> if this feature is planned in the future? Our experiment (mu3e) has one frontend
> per detector and each sequencer would only access a subset of ODB entries.
|
|
08 Jul 2026, Konstantin Olchanski, Suggestion, Multithreaded deferred transitions
|
> Deferred transition is registered by the FPN00
FPN00, yes, this rings a bell.
|
|
16 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
|
Bjarne Stroustrup gave a nice talk at CERN, good enough to bring Rene Brun out of retirement to ask a few
questions at the 1:16:50 mark.
|
|
16 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
|
> If you did not want to use exceptions before watching this talk, you will after!
Not me. One issue, exceptions are unpredictable, for example, does this code always print "hello, world"?
|
|
17 Jul 2026, Konstantin Olchanski, Bug Fix, repair of corrupted ODB free lists
|
I finished debugging the code I wrote to check and repair the ODB key area and data area free lists, this
should fix the famous "ODB is full" error.
|
|
20 Jul 2026, Konstantin Olchanski, Bug Fix, repair of corrupted ODB free lists
|
> I finished debugging the code I wrote to check and repair the ODB key area and data area free lists, this
> should fix the famous "ODB is full" error.
|
|
20 Jul 2026, Konstantin Olchanski, Forum, midas forum elog crashed, restarted
|
> I updated the midas forum elog to the latest version from git: 083448f7
>
> Also investigated elogd failure to start on reboot,
|
|
20 Jul 2026, Konstantin Olchanski, Info, c++ exceptions, follow up
|
> Looks like the code formatting got messed up by the elog... here it is in the attachment instead.
unfortunately, your code does nothing because you do not call "i2c_set_bit(10, 1);".
|
|
20 Jul 2026, Konstantin Olchanski, Forum, midas forum elog crashed, restarted
|
Also a crash soon after startup:
https://elog.psi.ch/elogs/Forum/69934
|
|
21 Jul 2026, Konstantin Olchanski, Forum, midas forum elog crashed, restarted
|
crashed again, restarted. gcc address sanitizer disables core dumps by default, to enable, do this:
export ASAN_OPTIONS=abort_on_error=1:disable_coredump=0:unmap_shadow_on_exit=1
K.O. |
|
22 Jul 2026, Konstantin Olchanski, Forum, midas forum elog crashed, restarted
|
> crashed again, restarted. gcc address sanitizer disables core dumps by default, to enable, do this:
> export ASAN_OPTIONS=abort_on_error=1:disable_coredump=0:unmap_shadow_on_exit=1
|
|
23 Jul 2026, Konstantin Olchanski, Info, ODB links to array elements explained
|
this is a draft message, it will be updated with additional information. K.O.
Back in 2007, Stefan implemented the very useful feature, ODB links to array elements,
|
|
23 Jul 2026, Konstantin Olchanski, Bug Fix, repair of corrupted ODB free lists
|
> > I finished debugging the code I wrote to check and repair the ODB key area and data area free lists, this
> > should fix the famous "ODB is full" error.
>
|
|
06 Aug 2026, Konstantin Olchanski, Suggestion, Multithreaded PySequencer
|
> > > I was wondering if one can use multiple pysequencers at the same time and if not
> > > if this feature is planned in the future? Our experiment (mu3e) has one frontend
> > > per detector and each sequencer would only access a subset of ODB entries.
|
|
17 Aug 2026, Konstantin Olchanski, Info, change in cm_shutdown and the Programs page
|
There was a bit of confusion on the MIDAS Programs page with programs that have
similar names. This confusion relates to the use of bUnique in cm_shutdown() and
cm_exist().
|
|
09 Sep 2026, Konstantin Olchanski, Info, change in cm_shutdown and the Programs page
|
> There was a bit of confusion on the MIDAS Programs page with programs that have
> similar names. This confusion relates to the use of bUnique in cm_shutdown() and
> cm_exist().
|