 21 Aug 2022, Joseph McKenna, Suggestion, mvodb functionality to get the 'LastWritten' property of a key
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 22 Aug 2022, Stefan Ritt, Suggestion, mvodb functionality to get the 'LastWritten' property of a key
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> I want to read data from the ODB with the mvodb interface in one of my frontends, it's useful to know how old that data is, so I prototyped functionality
in a pull request to mvodb:
>
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15 Aug 2022, Zaher Salman, Bug Report, firefox hangs due to mhistory
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Firefox is hanging/becoming unresponsive due to javascript code. After stopping the script manually to get firefox back in control I have the following
message in the console
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15 Aug 2022, Stefan Ritt, Bug Report, firefox hangs due to mhistory
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> Firefox is hanging/becoming unresponsive due to javascript code. After stopping the script manually to get firefox back in control I have the following
message in the console
>
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16 Aug 2022, Zaher Salman, Bug Report, firefox hangs due to mhistory
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> > Firefox is hanging/becoming unresponsive due to javascript code. After stopping the script manually to get firefox back in control I have the following
message in the console
> >
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16 Aug 2022, Zaher Salman, Bug Report, firefox hangs due to mhistory
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I found the bug. The problem is triggered by changing the firefox window. This calls a function that is supposed to change the size of the history plot
and it works well when the history plots are visible but not if the history plots are hidden in a javascript tab (not another firefox tab).
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17 Aug 2022, Stefan Ritt, Bug Report, firefox hangs due to mhistory
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The problem lies in your function mhistory_init_one() in Mudas.js:1965. You can only call "new MhistoryGraph(e)" with an element "e" which is something
like
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17 Aug 2022, Zaher Salman, Bug Report, firefox hangs due to mhistory
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> The problem lies in your function mhistory_init_one() in Mudas.js:1965. You can only call "new MhistoryGraph(e)" with an element "e" which is something
like
>
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17 Aug 2022, Stefan Ritt, Bug Report, firefox hangs due to mhistory
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> Some of my histories are placed in an IFrame object. I eventually realized that my code fails
> when it tries to resize a history which is placed in an invisible IFrame. I resolved the issue
> by making sure that I am resizing plots only if they are in a visible IFrame.
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16 Aug 2022, Konstantin Olchanski, Bug Report, firefox hangs due to mhistory
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> > > Firefox is hanging/becoming unresponsive due to javascript code.
>
> The URL (reachable only within PSI) is http://lem03.psi.ch:8081/?cmd=custom&page=Mudas
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05 Aug 2022, Stefan Ritt, Info, Information for midas updates though git
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Several submodules of midas have been re-organized, so if you want to pull the
newest version, you need a
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08 Aug 2022, Konstantin Olchanski, Info, Information for midas updates though git
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> git pull --recurse-submodules
> git submodule update --init --recursive
> git config submodule.recurse true
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08 Aug 2022, Stefan Ritt, Info, Information for midas updates though git
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> after I set "submodule.recurse true", I still have to type "git submodule update --
> init --recursive", without --recursive, mscb/mxml is empty and the build bombs.
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08 Aug 2022, Konstantin Olchanski, Info, odb disallow key names that start or end with spaces
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while testing the new odb editor, we ran into a number of problems with key names
that start or end with spaces. we cannot think of any valid use case for such key
names (subdirectories and variables) and we think they could only have been
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08 Aug 2022, Konstantin Olchanski, Info, midas on ubuntu LTS 22.04
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reporting that as of commit 78f707c0686d22f8329c7a1f1c46d7dccf35ceff, midas builds
without errors or warnings on Ubuntu LTS 22.04, 20.04, CentOS-7 and MacOS 12.4.
(except for some warnings from mscb and msc). K.O. |
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06 Aug 2022, Stefan Ritt, Info, Improvement of odbxx API
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While the odbxx API has been successfully used since the last months, a potential
problem with large ODBs surfaced. If you have lots of data in the ODB and load it
into an object like
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08 Aug 2022, Stefan Ritt, Info, Improvement of odbxx API
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After some thought, I changed the API again and removed the flag in the constructor,
so the system now automatically choses the best algorithm depending if the client
is connected to a local or a remote API. So in all cases you use again the old syntax:
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18 Jul 2022, Konstantin Olchanski, Release, midas-2022-05
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There is a release branch for midas-2022-05 and corresponding git tag midas-2022-
05-b. This branch is known to be stable and is working well for the ALPHA
experiment at CERN. Latest update to this branch fixes two problems in the
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25 Jun 2022, Joseph McKenna, Bug Report, RPC timeout for manalyzer over network
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In ALPHA, I get RPC timeouts running a (reasonably heavy) analyzer on a remote machine (connected directly via a ~30 meter 10Gbe Ethernet cable) after |
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18 Jul 2022, Konstantin Olchanski, Bug Report, RPC timeout for manalyzer over network
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> In ALPHA, I get RPC timeouts running a (reasonably heavy) analyzer on a remote machine (connected directly via a ~30 meter 10Gbe Ethernet cable) after
~5 minutes of running. If I run the analyser locally, I dont not see a timeout...
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19 Jun 2022, Francesco Renga, Forum, Alarm on variable not updating
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Dear all,
I've an ODB equipment that sometimes loses the connection with the hardware, so that the variables are not updated anymore. The connection can be
restored by restarting the frontend. It would be useful to have an alarm based on the time from the last update of some variable (i.e. the alarm is triggered |
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20 Jun 2022, Stefan Ritt, Forum, Alarm on variable not updating
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There are two functions to do that, one check the last write access, the other the last write access if the run is running. The alarm condition looks like:
access(/Equipment/.../Variables/Input[10]) > 60
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20 Jun 2022, jianrun, Bug Report, Error in "midas/src/mana.cxx"
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Dear Midas developers,
When we are running the examples in $MIDASSYS/examples/experiment/, we meet some
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15 Apr 2019, Konstantin Olchanski, Info, switch of MIDAS to C++
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For a long time now we have keep the core of midas (odb.c, midas.c, etc) compatible with plain C and by default
we have built the MIDAS library using the plain C compiler. Over time, we have switched most MIDAS programs
(mhttpd, mlogger, mdump, odbedit, etc) to C++ (with happy results). (and for a long time now, all of MIDAS
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15 Apr 2019, Konstantin Olchanski, Info, switch of MIDAS to C++, which C++?
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>
> With the removal of the requirement to make it possible to write MIDAS frontends in C, we can switch the MIDAS
> default build to C++ and start using C++ features in the MIDAS API (std::string, std::vector, etc).
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15 Apr 2019, Konstantin Olchanski, Info, switch of MIDAS to C++, how much C++?
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> >
> > With the removal of the requirement to make it possible to write MIDAS frontends in C, we can switch the MIDAS
> > default build to C++ and start using C++ features in the MIDAS API (std::string, std::vector, etc).
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16 Apr 2019, Pintaudi Giorgio, Info, switch of MIDAS to C++, how much C++?
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Dear Konstantin,
even if I am still quite young and have only limited experience (but not null), I would like to give my two cents. I have reflected a bit about the C++ |
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17 Apr 2019, John M O'Donnell, Info, switch of MIDAS to C++, how much C++?
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some semi-random thoughts:
no templates strictly means you can't use std::string, std::vector etc.
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22 Apr 2019, Pintaudi Giorgio, Info, switch of MIDAS to C++, how much C++? 
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Dear Konstantin and others,
our recent discussion stimulated my curiosity and I wrote a small frontend for the trigger board of our experiment in C++.
The underlying hardware details are not relevant here. I would just like to briefly report and discuss what I found out.
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23 Apr 2019, Konstantin Olchanski, Info, switch of MIDAS to C++, how much C++?
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> Dear Konstantin and others, our recent discussion stimulated my curiosity and I wrote a small frontend for the trigger board of our
experiment in C++.
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11 May 2019, Konstantin Olchanski, Info, switch of MIDAS to C++, which C++?
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> [which c++]
>
> - Linux RHEL/SL/CentOS6 - gcc 4.4.7, no C++11.
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22 May 2019, Konstantin Olchanski, Info, switch of MIDAS to C++
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> switch MIDAS to C++
switch to C++ will proceed as follows:
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05 Jun 2019, Konstantin Olchanski, Info, MIDAS switched to C++
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The last bits of code to switch MIDAS to C++ have been committed, see tag midas-2019-05-cxx.
Since the cmake conversion is still in progress, for now, I recommend using the old "make" build for trying this update.
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17 May 2022, Razvan Stefan Gornea, Info, MIDAS switched to C++
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Hi, I have three naive questions about this:
- have you posted somewhere this guide about converting C frontends to C++?
- it was mentioned previously that there will be a 'tag the last "C" midas', which version is it?
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17 May 2022, Konstantin Olchanski, Info, MIDAS switched to C++
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> Hi, I have three naive questions about this:
all good questions, ask more of them.
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17 May 2022, Ben Smith, Info, MIDAS switched to C++
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> - have you posted somewhere this guide about converting C frontends to C++?
There's documentation in the wiki at:
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08 May 2022, Stefan Ritt, Info, RO_STOPPED with triggered events
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We had issues in one of our experiment that people used RO_STOPPED in the
equipment list together with triggered events (EQ_USER). If events are sent when
a run is stopped, this leads to many unexpected results, so I added a check in
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08 May 2022, Konstantin Olchanski, Info, RO_STOPPED with triggered events
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> some old front-end are not running any more since they do use RO_ALWAYS together with
triggered events.
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16 May 2022, Konstantin Olchanski, Info, RO_STOPPED with triggered events
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> > some old front-end are not running any more since they do use RO_ALWAYS together with
> triggered events.
>
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17 May 2022, Stefan Ritt, Info, RO_STOPPED with triggered events
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> > > some old front-end are not running any more since they do use RO_ALWAYS together with
> > triggered events.
> >
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24 Apr 2022, Konstantin Olchanski, Bug Fix, mserver buffer overrun and crash
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There is a memory allocation bug in the mserver.
ALIGN8() was missing when receiving events from the event socket and data buffer
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16 May 2022, Konstantin Olchanski, Bug Fix, mserver buffer overrun and crash
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> There is a memory allocation bug in the mserver.
Fix for this problem introduced a new problem, an infinite loop in bm_flush_cache,
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13 May 2022, Konstantin Olchanski, Info, analysis of corner cases in event buffer write cache
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introduction:
to remember, bm_send_event() writes an event to the write cache, bm_flush_cache()
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16 May 2022, Konstantin Olchanski, Info, analysis of corner cases in event buffer write cache
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> for correct operation of bm_send_event() under all conditions we need to ...
to continue computation from last message:
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16 May 2022, Konstantin Olchanski, Info, analysis of corner cases in event buffer write cache
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> > for correct operation of bm_send_event() under all conditions we need to ...
> to continue computation from last message:
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06 May 2022, Stefan Ritt, Info, Increased timeout for program shut down
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We had the problem in our lab that a frontend took about 6 seconds to gracefully
shut down, mainly it needed to park some motors. I found that the shutdown command
had a hard-coded timeout of 5 seconds, after which the frontend gets killed, and
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04 May 2022, Konstantin Olchanski, Bug Fix, mysql history update
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the code for writing midas history to mysql has been updated to work against
MYSQL 8.0.23 (CERN ALPHA-2):
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30 Apr 2022, Konstantin Olchanski, Info, added web pages for "show odb clients" and "show open records"
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for a long time, midas web pages have been missing the equivalent of odbedit
"scl" and "sor" to display current odb clients and current odb open records.
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04 May 2022, Stefan Ritt, Info, added web pages for "show odb clients" and "show open records"
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Concerning the "scl" page, we are currently having a discussion. At the moment, one can
see midas clients in three different places:
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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added JSON RPC for bm_receive_event() and added a web page for "mdump".
the event dump is a hex dump for now.
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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> added JSON RPC for bm_receive_event()
there is a number of problems with implementing bm_receive_event() as a RPC:
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01 May 2022, Konstantin Olchanski, Info, added web page for "mdump"
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> added a web page for "mdump".
missing functions:
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02 May 2022, Stefan Ritt, Info, added web page for "mdump"
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Here are some of my thoughts:
- I volunteer to write the JavaScript midas bank decoder. Just a couple of pure javascript functions, no
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30 Apr 2022, Giovanni Mazzitelli, Forum, S3 Object Storage
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Dear all,
We are storing raw MIDAS files to S3 Object Storage, but MIDAS file are not
optimised for readout from such kind of storage. There is any work around on
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30 Apr 2022, Konstantin Olchanski, Forum, S3 Object Storage
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> We are storing raw MIDAS files to S3 Object Storage, but MIDAS file are not
> optimised for readout from such kind of storage. There is any work around on
> evolution of midas raw output or, beyond simulated posix fs, to develop midas
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01 May 2022, Giovanni Mazzitelli, Forum, S3 Object Storage
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> > We are storing raw MIDAS files to S3 Object Storage, but MIDAS file are not
> > optimised for readout from such kind of storage. There is any work around on
> > evolution of midas raw output or, beyond simulated posix fs, to develop midas
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16 Mar 2022, Stefan Ritt, Info, New midas sequencer version
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A new version of the midas sequencer has been developed and now available in the
develop/seq_eval branch. Many thanks to Lewis Van Winkle and his TinyExpr library
(https://codeplea.com/tinyexpr), which has now been integrated into the sequencer
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22 Mar 2022, Stefan Ritt, Info, New midas sequencer version
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After several days of testing in various experiments, the new sequencer has
been merged into the develop branch. One more feature was added. The path to
the ODB can now contain variables which are substituted with their values.
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15 Apr 2022, Stefan Ritt, Info, New midas sequencer version
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I prepared some slides about the new features of the sequencer and post it here so
people can have a quick look at get some inspiration.
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