 21 May 2024, Nikolay, Bug Report, experiment from midas/examples 
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There are 2 bugs in midas/examples/experiment:
1) In fronted bank named "PRDC" is created for scaler event. But in analyzer
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17 May 2024, Konstantin Olchanski, Bug Report, odbedit load into the wrong place
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Trying to restore IRIS ODB was a nasty surprise, old save files are in .odb format and odbedit "load xxx.odb"
does an unexpected thing.
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 18 May 2024, Stefan Ritt, Bug Report, odbedit load into the wrong place
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Taht's strange. I always was under the impression that .odb files are loaded relatively to the current location in
the ODB. The behaviour should not be different for different data formats, so I agree to change the .odb loading to
behave like the .xml and .json save/load.
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16 May 2024, Konstantin Olchanski, Bug Report, midas alarm borked condition evaluation
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I am updating the TRIUMF IRIS experiment to the latest version of MIDAS. I see following error messages in midas.log:
19:06:16.806 2024/05/16 [mhttpd,ERROR] [odb.cxx:6967:db_get_data_index,ERROR] index (29) exceeds array length (20) for key
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17 May 2024, Stefan Ritt, Bug Report, midas alarm borked condition evaluation
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This is a common problem I also encountered in the past. You get a low-level ODB access error (could also be a read of a non-existing key) and you
have no idea where this comes from. Could be the alarm system, a mhttpd web page, even some user code in a front-end over which the midas library
has no control.
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17 May 2024, Konstantin Olchanski, Bug Report, midas alarm borked condition evaluation
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> This is a common problem I also encountered in the past. You get a low-level ODB access error (could also be a read of a non-existing key) and you
> have no idea where this comes from. Could be the alarm system, a mhttpd web page, even some user code in a front-end over which the midas library
> has no control.
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17 May 2024, Konstantin Olchanski, Bug Report, midas alarm borked condition evaluation
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>
> And I think I know what caused the original problem in IRIS experiment, I think the list of EPICS variables got truncated from 30 to 20 and EPICS
> values 29 and 30 used in the alarm conditions have become lost.
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18 May 2024, Stefan Ritt, Bug Report, midas alarm borked condition evaluation
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For everybody using EPICS: There is now a new system called MSetPoint (Midas Set Point) to control whole beamlines via EPICS.
It's under midas/msetpoint and the documentation is here:
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14 May 2024, Konstantin Olchanski, Info, ROOT v6.30.6 requires libtbb-dev
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root_v6.30.06.Linux-ubuntu22.04-x86_64-gcc11.4 the libtbb-dev package.
This is a new requirement and it is not listed in the ROOT dependancies page (I left a note on the ROOT forum, hopefully it will be
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29 Apr 2024, Musaab Al-Bakry, Forum, Midas Sequencer with less than 1 second wait
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Hello there,
I am working on a task that involves some ODB changes that happen within 20-500
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29 Apr 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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I guess the simplest way to do that without breaking with existing code is to change the
second number to a float. So a
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30 Apr 2024, Scott Oser, Forum, Midas Sequencer with less than 1 second wait
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> I guess the simplest way to do that without breaking with existing code is to change the
> second number to a float. So a
>
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30 Apr 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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> This would work fine in principle, but isn't implemented in the current MIDAS sequencer as we understand it. (We tried!) Is your proposal to rewrite
the sequencer
> to allow fractional waits? Right now the code seems to store the start_time as a DWORD and uses atoi to parse the wait time, and uses ss_time (which |
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30 Apr 2024, Scott Oser, Forum, Midas Sequencer with less than 1 second wait
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> > This would work fine in principle, but isn't implemented in the current MIDAS sequencer as we understand it. (We tried!) Is your proposal to rewrite
the sequencer
> > to allow fractional waits? Right now the code seems to store the start_time as a DWORD and uses atoi to parse the wait time, and uses ss_time (which |
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30 Apr 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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While I will do it, i'm not sure if this is what you want. If I understand correctly, some process gets triggered and then writes some values to the ODB,
then the sequencer
should continue. Putting a wait there is dangerous. Maybe your process always takes like 10-20 ms, so you put a wait of let's say 100ms, and things are |
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30 Apr 2024, Scott Oser, Forum, Midas Sequencer with less than 1 second wait
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> While I will do it, i'm not sure if this is what you want. If I understand correctly, some process gets triggered and then writes some values to the ODB,
then the sequencer
> should continue. Putting a wait there is dangerous. Maybe your process always takes like 10-20 ms, so you put a wait of let's say 100ms, and things are |
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02 May 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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Ok, I implemented the float second wait function. Internally it works in ms, so the maximum resolution is 0.001 s.
Best,
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02 May 2024, Scott Oser, Forum, Midas Sequencer with less than 1 second wait
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> Ok, I implemented the float second wait function. Internally it works in ms, so the maximum resolution is 0.001 s.
>
> Best,
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05 May 2024, Musaab Al-Bakry, Forum, Midas Sequencer with less than 1 second wait
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> > Ok, I implemented the float second wait function. Internally it works in ms, so the maximum resolution is 0.001 s.
> >
> > Best,
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06 May 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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Indeed there was a sleep(100ms) in the sequencer in each loop. I reduced it now to 10ms. I need at least 10ms since otherwise
the sequencer would run in an infinite loop during the wait and burn 100% CPU. The smallest time slice on Linux to sleep is
10ms, so that's why I set it to that. Give it a try.
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06 May 2024, Stefan Ritt, Forum, Midas Sequencer with less than 1 second wait
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Actually I realized that a 1ms wait still works, so I reduced it to that.
Stefan |
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07 May 2024, Musaab Al-Bakry, Forum, Midas Sequencer with less than 1 second wait
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> Actually I realized that a 1ms wait still works, so I reduced it to that.
>
> Stefan
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03 May 2024, Thomas Senger, Suggestion, Possible addition to IF Statements
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Hello there,
in our setup we use many variables with many different exceptions. Would it be possible to implement something like an
IF or/and IF statement? I believe that this is currently not possible.
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03 May 2024, Stefan Ritt, Suggestion, Possible addition to IF Statements
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The tinyexpr library I use to evaluate expressions does not support boolean operations. I would have to switch to the newer
tineyexpr-plusplus version, which also has much richer functionality:
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15 Apr 2024, Konstantin Olchanski, Bug Report, open MIDAS RPC ports
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we had a bit of trouble with open network ports recently and I now think security of MIDAS RPC
ports needs to be tightened.
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15 Apr 2024, Stefan Ritt, Bug Report, open MIDAS RPC ports
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One thing coming to my mind is the interface binding. If you have a midas host with two networks
("global" and "local"=192.168.x.x), you can tell to which interface a socket should bind.
By default it binds both interfaces, but we could restrict the socket only to bind to the local
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18 Mar 2024, Grzegorz Nieradka, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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I tried to update MIDAS installation on Ubuntu 22.04.1 to the latest commit at
the bitbucket.
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18 Mar 2024, Konstantin Olchanski, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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> [ 34%] Linking CXX executable manalyzer_test.exe
> /usr/bin/ld: /home/astrocent/workspace/root/root_install/lib/libRIO.so: undefined
> reference to
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19 Mar 2024, Grzegorz Nieradka, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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Dear Konstantin,
Thank you for your interest in my problem.
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19 Mar 2024, Konstantin Olchanski, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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ok, thank you for your information. I cannot reproduce this problem, I use vanilla Ubuntu
LTS 22, ROOT binary kit root_v6.30.02.Linux-ubuntu22.04-x86_64-gcc11.4 from root.cern.ch
and latest midas from git.
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19 Mar 2024, Konstantin Olchanski, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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> ok, thank you for your information. I cannot reproduce this problem, I use vanilla Ubuntu
> LTS 22, ROOT binary kit root_v6.30.02.Linux-ubuntu22.04-x86_64-gcc11.4 from root.cern.ch
> and latest midas from git.
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28 Mar 2024, Grzegorz Nieradka, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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I found solution for my trouble. With MIDAS and ROOT everything is OK,
the trobule was with my Ubuntu enviroment.
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02 Apr 2024, Konstantin Olchanski, Bug Report, Midas (manalyzer) + ROOT 6.31/01 - compilation error
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> I found solution for my trouble. With MIDAS and ROOT everything is OK,
> the trobule was with my Ubuntu enviroment.
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02 Apr 2024, Zaher Salman, Info, Sequencer editor
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Dear all,
Stefan and I have been working on improving the sequencer editor to make it look and feel more like a standard editor. This sequencer v2 has been finally
merged into the develop branch earlier today.
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02 Apr 2024, Konstantin Olchanski, Info, Sequencer editor
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> Stefan and I have been working on improving the sequencer editor ...
Looks grand! Congratulations with getting it completed. The previous version was
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01 Apr 2024, Konstantin Olchanski, Info, xz-utils bomb out, compression benchmarks
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you may have heard the news of a major problem with the xz-utils project, authors of the popular "xz" file compression,
https://nvd.nist.gov/vuln/detail/CVE-2024-3094
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10 Mar 2024, Zaher Salman, Bug Report, Autostart program
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Hello everyone,
It seems that if a frontend is started automatically by using Program->Auto start then the status page does not show it as started. This is since the FE |
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11 Mar 2024, Konstantin Olchanski, Bug Report, Autostart program
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> It seems that if a frontend is started automatically by using Program->Auto start then the status page does not show it as started. This is since the
FE name has a number after the name. If I stop and start manually then the status page shows the correct state of the FE. Am I doing something wrong or
is this a bug somewhere?
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08 Mar 2024, Konstantin Olchanski, Info, MIDAS frontend for WIENER L.V. P.S. and VME crates
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Our MIDAS frontend for WIENER power supplies is now available as a standalone git repository.
https://bitbucket.org/ttriumfdaq/fewienerlvps/src/master/
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27 Feb 2024, Pavel Murat, Forum, displaying integers in hex format ?
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Dear MIDAS Experts,
I'm having an odd problem when trying to display an integer stored in ODB on a custom
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27 Feb 2024, Stefan Ritt, Forum, displaying integers in hex format ?
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Thanks for reporting that bug. I fixed it and committed the change to the develop branch.
Stefan |
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27 Feb 2024, Pavel Murat, Forum, displaying integers in hex format ?
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Hi Stefan (and Ben),
thanks for reacting so promptly - your commits on Bitbucket fixed the problem.
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30 Mar 2016, Belina von Krosigk, Forum, mserver ERR message saying data area 100% full, though it is free
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Hi,
I have just installed Midas and set-up the ODB for a SuperCDMS test-facility (on
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26 Feb 2024, Maia Henriksson-Ward, Forum, mserver ERR message saying data area 100% full, though it is free
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> Hi,
>
> I have just installed Midas and set-up the ODB for a SuperCDMS test-facility (on
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28 Jan 2024, Pavel Murat, Forum, number of entries in a given ODB subdirectory ?
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Dear MIDAS experts,
- I have a detector configuration with a variable number of hardware components - FPGA's receiving data
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28 Jan 2024, Konstantin Olchanski, Forum, number of entries in a given ODB subdirectory ?
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Very good question. It exposes a very nasty problem, the race condition between "ls" and "rm". While you are
looping over directory entries, somebody else is completely permitted to remove one of the files (or add more
files), making the output of "ls" incorrect (contains non-existant/removed files, does not contain newly added
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28 Jan 2024, Stefan Ritt, Forum, number of entries in a given ODB subdirectory ?
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I guess you won't change your FPGA configuration just when you start a run, so I don't consider the race
condition very crucial (although KO is correct, it it there).
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29 Jan 2024, Pavel Murat, Forum, number of entries in a given ODB subdirectory ?
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Hi Stefan, Konstantin,
thanks a lot for your responses - they are very teaching and it is good to have them archived in the forum.
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29 Jan 2024, Konstantin Olchanski, Forum, number of entries in a given ODB subdirectory ?
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> https://chat.openai.com/share/d927c78d-9914-4413-ab5e-3b0e5d173132
>
> Please note that you never can be 100% sure that the code from a LLM is correct
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03 Feb 2024, Pavel Murat, Forum, number of entries in a given ODB subdirectory ?
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Konstantin is right: KEY.num_values is not the same as the number of subkeys (should it be ?)
For those looking for an example in the future, I attach a working piece of code converted
from the ChatGPT example, together with its printout.
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08 Feb 2024, Stefan Ritt, Forum, number of entries in a given ODB subdirectory ?
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> Konstantin is right: KEY.num_values is not the same as the number of subkeys (should it be ?)
For ODB keys of type TID_KEY, the value num_values IS the number of subkeys. The only issue here is
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11 Feb 2024, Pavel Murat, Forum, number of entries in a given ODB subdirectory ?
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> For ODB keys of type TID_KEY, the value num_values IS the number of subkeys.
this logic makes sense, however it doesn't seem to be consistent with the printout of the test example
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13 Feb 2024, Stefan Ritt, Forum, number of entries in a given ODB subdirectory ?
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> > For ODB keys of type TID_KEY, the value num_values IS the number of subkeys.
>
> this logic makes sense, however it doesn't seem to be consistent with the printout of the test example
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15 Feb 2024, Konstantin Olchanski, Forum, number of entries in a given ODB subdirectory ?
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> > > For ODB keys of type TID_KEY, the value num_values IS the number of subkeys.
> >
> > this logic makes sense, however it doesn't seem to be consistent with the printout of the test example
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15 Feb 2024, Konstantin Olchanski, Forum, number of entries in a given ODB subdirectory ?
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> > You are right, num_values is always 1 for TID_KEYS. The number of subkeys is stored in
> > ((KEYLIST *) ((char *)pheader + pkey->data))->num_keys
> > Maybe we should add a function to return this. But so far db_enum_key() was enough.
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15 Feb 2024, Stefan Ritt, Forum, number of entries in a given ODB subdirectory ?
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> Hmm... is there any use case where you want to know the number of directory entries, but you will not iterate
> over them later?
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19 Feb 2024, Pavel Murat, Forum, number of entries in a given ODB subdirectory ?
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> > Hmm... is there any use case where you want to know the number of directory entries, but you will not iterate
> > over them later?
>
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15 Jan 2024, Frederik Wauters, Forum, dump history FILE files
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We switched from the history files from MIDAS to FILE, so we have *.dat files now (per variable), instead of the old *.hst.
How shoul
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28 Jan 2024, Konstantin Olchanski, Forum, dump history FILE files
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$ cat mhf_1697445335_20231016_run_transitions.dat
event name: [Run transitions], time [1697445335]
tag: tag: /DWORD 1 4 /timestamp
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18 Feb 2024, Frederik Wauters, Forum, dump history FILE files
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> $ cat mhf_1697445335_20231016_run_transitions.dat
> event name: [Run transitions], time [1697445335]
> tag: tag: /DWORD 1 4 /timestamp
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14 Feb 2024, Konstantin Olchanski, Info, bitbucket permissions
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I pushed some buttons in bitbucket user groups and permissions to make it happy
wrt recent changes.
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03 Feb 2024, Pavel Murat, Bug Report, string --> int64 conversion in the python interface ?
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Dear MIDAS experts,
I gave a try to the MIDAS python interface and ran all tests available in midas/python/tests.
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05 Feb 2024, Ben Smith, Bug Fix, string --> int64 conversion in the python interface ?
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> The symptoms are consistent with a string --> int64 conversion not happening
> where it is needed.
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13 Feb 2024, Konstantin Olchanski, Bug Fix, string --> int64 conversion in the python interface ?
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> > The symptoms are consistent with a string --> int64 conversion not happening
> > where it is needed.
>
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14 Feb 2024, Konstantin Olchanski, Bug Fix, added ubuntu-22 to nightly build on bitbucket, now need python!
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> Are we running these tests as part of the nightly build on bitbucket? They would be part of
> the "make test" target. Correct python dependancies may need to be added to the bitbucket OS
> image in bitbucket-pipelines.yml. (This is a PITA to get right).
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05 Feb 2024, Pavel Murat, Forum, forbidden equipment names ?
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Dear MIDAS experts,
I have multiple daq nodes with two data receiving FPGAs on the PCIe bus each.
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13 Feb 2024, Konstantin Olchanski, Forum, forbidden equipment names ?
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> equipment names are 'mu2edaq09:DTC0' and 'mu2edaq09:DTC1'
I think all names permitted for ODB keys are allowed as equipment names, any valid UTF-8,
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12 Feb 2024, Konstantin Olchanski, Info, MIDAS and ROOT 6.30
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Starting around ROOT 6.30, there is a new dependency requirement for nlohmann-json3-dev from https://github.com/nlohmann/json.
If you use a Ubuntu-22 ROOT binary kit from root.cern.ch, MIDAS build will bomb with errors: Could not find a package configuration file provided by "nlohmann_json"
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