 28 Mar 2025, Konstantin Olchanski, Info, mjsroot added
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I need to look at histograms inside a ROOT file, but all the old ways for doing this no longer work. (in theory I can scp the ROOT file to
the computer I am sitting in front of, but this assumes I have a working ROOT there. anyhow it is pointless to fight this, all modern
packages are written to only work on the developer's laptop).
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 28 Mar 2025, Konstantin Olchanski, Bug Fix, midas cmake update
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MIDAS git tag midas-2025-01-a introduced an incompatible change to "include midas-targets.cmake". Instead of "midas" one now has to
say "midas::midas", as updated below. K.O.
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28 Mar 2025, Konstantin Olchanski, Suggestion, improved find_package behaviour for Midas
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I figured out the breakage, added a git tag to identify where the cmake incompatible change was made (roughly)
and posted a note on how to fix it. Please reimburse me for the 2 hours I had to spend on this instead of doing
useful work. K.O. |
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28 Mar 2025, Konstantin Olchanski, Bug Fix, manalyzer -R8082 --jsroot
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When processing MIDAS files offline, JSROOT did not work, -Rxxx worked, http
connection would open, but would not serve any histograms. This should now be
fixed.
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30 Mar 2025, Konstantin Olchanski, Bug Fix, manalyzer improvements
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updated manalyzer:
- similar to --jsroot switch, in online mode, the ROOT output file remains open after run is stopped. Previously, after run was
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01 Apr 2025, Konstantin Olchanski, Bug Fix, ODB and event buffer - release semaphore before abort() and core dump
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There is a long standing problem with ODB and event buffers. If they detect an
internal data inconsistency and cannot continue running, they call abort() to
dump core and stop.
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01 Apr 2025, Konstantin Olchanski, Bug Report, ODB corruption
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We see ODB corruption crashes in the DS20k vertical slice MIDAS instance.
Crash is memset() called by db_delete_key1() called by cm_connect_experiment().
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01 Apr 2025, Konstantin Olchanski, Suggestion, Sequencer ODBSET feature requests
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> ODBSET "/Path/value[1,3,5]"
> ODBSET "/Path/value[1-5,7-9]"
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01 Apr 2025, Konstantin Olchanski, Bug Report, MIDAS history system not using the event timestamps ?
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> I confirm that when writing out history files corresponding to the slow control event data,
> MIDAS history system timestamps the data not with the event time coming from the event data,
> but with the current time determined by [mlogger].
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02 Apr 2025, Konstantin Olchanski, Bug Report, MIDAS history system not using the event timestamps ?
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> > You can always include your "true" data timestamp as the first value in your data.
>
> Are you saying that if the first data word of a history event were a timestamp,
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02 Apr 2025, Konstantin Olchanski, Suggestion, Sequencer ODBSET feature requests
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> I once looked at using LUA for this
>
> > but I think basing off an full featured programming language like python
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05 May 2025, Konstantin Olchanski, Bug Fix, Bug fix in SQL history
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A bug was introduced to the SQL history in 2022 that made renaming of variable names not work. This is now fixed.
break commit:
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05 May 2025, Konstantin Olchanski, Info, db_delete_key(TRUE)
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I was working on an odb corruption crash inside db_delete_key() and I noticed
that I did not test db_delete_key() with follow_links set to TRUE. Then I noticed
that nobody nowhere seems to use db_delete_key() with follow_links set to TRUE.
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05 May 2025, Konstantin Olchanski, Bug Report, abort and core dump in cm_disconnect_experiment()
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I noticed that some programs like mhist, if they take too long, there is an abort and core dump at the very end. This is because they forgot to
set/disable the watchdog timeout, and they got remove from odb and from the SYSMSG event buffer.
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16 May 2025, Konstantin Olchanski, Bug Report, history_schema.cxx fails to build
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> we have a CI setup which fails since 06.05.2025 to build the history_schema.cxx.
> There was a major change in this code in the commits fe7f6a6 and 159d8d3.
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16 May 2025, Konstantin Olchanski, Bug Report, history_schema.cxx fails to build
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> > we have a CI setup which fails since 06.05.2025 to build the history_schema.cxx.
> > There was a major change in this code in the commits fe7f6a6 and 159d8d3.
>
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04 Jun 2025, Konstantin Olchanski, Bug Report, Memory leak in mhttpd binary RPC code
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Noted. I will look at this asap. K.O.
[quote="Mark Grimes"]Hi,
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10 Jun 2025, Konstantin Olchanski, Bug Report, Memory leak in mhttpd binary RPC code
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I confirm that MJSON_ARRAYBUFFER does not work correctly for zero-size buffers,
buffer is leaked in the destructor and copied as NULL in MJsonNode::Copy().
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23 Jul 2025, Konstantin Olchanski, Suggestion, K.O.'s guide to new C/C++ data types
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Over the last 10 years, the traditional C/C++ data types have been
displaced by a hodgepodge of new data types that promise portability
and generate useful (and not so useful) warnings, for example:
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24 Jul 2025, Konstantin Olchanski, Suggestion, K.O.'s guide to new C/C++ data types
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> for (int i=0; i<array_of_10_elements.size(); i++)
becomes
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