 13 Nov 2014, Tim Gorringe, Forum, using single frontend with multiple "EQ_POLLED" equipments to generate different data streams
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We have a MIDAS frontend that provides both the readout of raw events
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 13 Nov 2014, Pierre-Andre Amaudruz, Forum, using single frontend with multiple "EQ_POLLED" equipments to generate different data streams
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Hi Tim,
Multiple Polling equipment are possible, but you may have to balance the polling
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12 Nov 2014, Robert Pattie, Forum, struct mismatch 
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Hi all,
I've started receiving the following error that I can't track down. Does
anyone have a suggestion for where to start looking for the cause of this?
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19 May 2014, Razvan Stefan Gornea, Forum, Weird problem on new installation
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Hello,
I have a very weird problem on a new installation of Midas running also new code. My old code was written with the CAEN VME
library and run from an older PC with a CAEN interface. I now moved to a GEFanuc V7769 with a Tundra II bridge and the frontend is using the UniverseII |
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22 May 2014, Razvan Stefan Gornea, Forum, Weird problem on new installation
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I reduced the parameter space a little bit and I think the problem is somewhere in the framework. What I did is first to make a short program which accesses
the ODB and I was able to access the Settings record. Everything seems to work fine, if parts or all of the record is missing then it is created automatically,
etc. |
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27 May 2014, Razvan Stefan Gornea, Forum, Weird problem on new installation
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I investigated further this problem and this is what I think is going on. Essentially when creating the Settings key, the framework scans all the subkeys
of the parent key to see if any are open. If that's the case it then returns an error on opening the Settings key! Here are the details:
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06 Nov 2014, Stefan Ritt, Forum, Weird problem on new installation
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[quote="Razvan Stefan Gornea"]In my case I have the following structure in ODB right before the framework calls frontend_init():
/Equipment/CAEN_V1740 [B][CLOSE][/B]
/Equipment/CAEN_V1740/Variables [B][CLOSE][/B]
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26 May 2014, Clemens Sauerzopf, Forum, Running a frontend on Arduino Yun
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Hello,
I'm trying to get a frontend running on an arduino yun single board computer
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26 May 2014, Konstantin Olchanski, Forum, Running a frontend on Arduino Yun
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> I'm trying to get a frontend running on an arduino yun single board computer
> (cpu is Atheros AR9331 and OS is a linux derivate
> http://arduino.cc/en/Main/ArduinoBoardYun )
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27 May 2014, Clemens Sauerzopf, Forum, Running a frontend on Arduino Yun
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Ok, I'm currently trying to get things running, setting up a crosscompiler toolchain for the Arduino Yun is fairly
easy, just follow the tutorial on the OpenWrt webpage.
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27 May 2014, Konstantin Olchanski, Forum, Running a frontend on Arduino Yun
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> Ok, I'm currently trying to get things running, setting up a crosscompiler toolchain for the Arduino Yun is fairly
> easy, just follow the tutorial on the OpenWrt webpage.
>
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28 May 2014, Clemens Sauerzopf, Forum, Running a frontend on Arduino Yun
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Thank you very much for your input, it finally works. I succeeded in crosscompiling the frontend and running it on the ArduinoYun. The 64 MB RAM is more
than
enough to run the mserver and a frontend and connect to a remote midas server over ethernet or wifi.
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24 Oct 2014, Clemens Sauerzopf, Forum, Running a frontend on Arduino Yun
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Hello,
I'm currently trying to create a midas bank for basic temperature reading from the Arduino Yun, but when creating a bank the frontend crashed with a segfault, |
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24 Oct 2014, Stefan Ritt, Forum, Running a frontend on Arduino Yun
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> Hello,
>
> I'm currently trying to create a midas bank for basic temperature reading from the Arduino Yun, but when creating a bank the frontend crashed with a |
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24 Oct 2014, Konstantin Olchanski, Forum, Running a frontend on Arduino Yun
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> INT read_event(char *pevent, INT off)
> {
> WORD *data;
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02 Nov 2014, Stefan Ritt, Forum, Running a frontend on Arduino Yun
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> With the correct definition, you should get a compile error (type mismatch).
>
> With the wrong current definition, you should have gotten a warning about "use of uninitialized variable 'data'", but some compilers with some settings |
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14 Oct 2014, Konstantin Olchanski, Bug Report, Hostile network scans against MIDAS RPC ports
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At CERN I see a large number of hostile network scans that seem to be injecting HTTP requests into the
MIDAS RPC ports. So far, all these requests seem to be successfully rejected without crashing anything, but
they do clog up midas.log.
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14 Oct 2014, Stefan Ritt, Bug Report, Hostile network scans against MIDAS RPC ports
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Doing this through the ODB seems ok to me. If the ODB cannot be accessed, you can fall back to no protection.
At PSI we fortunately do not have these network scans because PSI uses a institute-wide firewall. So you can connect from outside PSI to inside PSI only |
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16 Oct 2014, Konstantin Olchanski, Bug Report, Hostile network scans against MIDAS RPC ports
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> Doing this through the ODB seems ok to me. If the ODB cannot be accessed, you can fall back to no protection.
>
> At PSI we fortunately do not have these network scans because PSI uses a institute-wide firewall.
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16 Oct 2014, Stefan Ritt, Bug Report, Hostile network scans against MIDAS RPC ports
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> Sometimes we have very small MIDAS installations, i.e. just one machine by itself, and such setups should be secure/secured easily -
> too much work to setup an external firewall box just for one machine and OS-level firewall rules sometimes conflict
> with some OS services (i.e. NIS) (I am still waiting for the "NIS to LDAP migration for dummies" guide).
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14 Oct 2014, Konstantin Olchanski, Bug Report, Problem in mfe multithread equipments
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In the ALPHA experiment at CERN I found a problem in mfe.c handling of multithreaded equipments. This problem was in
some forms introduced around May 2013 and around Aug 2013 (commit
https://bitbucket.org/tmidas/midas/src/45984c35b4f7/src/mfe.c) (I hope I got it right).
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14 Oct 2014, Konstantin Olchanski, Bug Report, Problem in mfe multithread equipments
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For my reference:
good version: https://bitbucket.org/tmidas/midas/src/6899b96a4f8177d4af92035cd84aadf5a7cbc875/src/mfe.c?at=develop
first breakage: https://bitbucket.org/tmidas/midas/src/c60259d9a244bdcd296a8c5c6ab0b91de27f9905/src/mfe.c?at=develop
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15 Oct 2014, Stefan Ritt, Bug Report, Problem in mfe multithread equipments
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You are absolutely correct, the code is certainly wrong. It looks to me like the
while (rbh)
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15 Oct 2014, Stefan Ritt, Bug Report, Problem in mfe multithread equipments
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Please disregard my previous posting, you don't need the while loop, since it's already in the scheduler (around lines 2160 under /*---- send interrupt
events ----*/).
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16 Oct 2014, Stefan Ritt, Bug Report, Problem in mfe multithread equipments
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> while (1)
> wait 10 ms for an event
> process event, loop back
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14 Oct 2014, Konstantin Olchanski, Bug Report, Problem with EQ_USER
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If you use EQ_USER in mfe.c and have multiple threads writing into the ring buffer, you will have a big
problem - the thread locking in the ring buffer code only works for a single writer thread and a single
reader thread.
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15 Oct 2014, Stefan Ritt, Bug Report, Problem with EQ_USER
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Sure, each thread needs its own ring buffer for writing.
So I see that we need back the multiple-ring-buffer-readout-scheme even before MEG will start. So what you need is something like
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16 Oct 2014, Stefan Ritt, Bug Report, Problem with EQ_USER
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I restructured the front-end code to enable multiple readout threads for EQ_USER equipment. Last summer I was definitively interrupted during
that work and left it in an half finished state, sorry for that.
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16 Jul 2014, Clemens Sauerzopf, Forum, CAEN V1742 midas driver
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Hello all,
as discussed in the thread about Interrupt triggered readout
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08 Sep 2014, Clemens Sauerzopf, Forum, CAEN V1742 midas driver
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Hello all,
As an addition to the driver functions I uploaded in this thread I would also have a
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11 Jul 2014, Konstantin Olchanski, Info, MIDAS high speed test
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We have tested operation of MIDAS using a 10GigE network connection. Using a dummy frontend
generating fake data, we can record MIDAS data to disk at at least 700 Mbytes/sec as reported by
the MIDAS status page.
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06 Aug 2014, Konstantin Olchanski, Info, MIDAS high speed test
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> We have tested operation of MIDAS using a 10GigE network connection. Using a dummy frontend
> generating fake data, we can record MIDAS data to disk at at least 700 Mbytes/sec as reported by
> the MIDAS status page.
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10 Jul 2014, Clemens Sauerzopf, Forum, Adding Interrupt handling to SIS3100 driver
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Hello,
we are using the Struck SIS 3100 VME interface for our experiment, but the midas
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11 Jul 2014, Pierre-Andre Amaudruz, Forum, Adding Interrupt handling to SIS3100 driver
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> Hello,
>
> we are using the Struck SIS 3100 VME interface for our experiment, but the midas
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14 Jul 2014, Clemens Sauerzopf, Forum, Adding Interrupt handling to SIS3100 driver
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Hi Pierre-Andre,
thanks for your comments. If I understand you correctly you are advising to separate the
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15 Jul 2014, Pierre-Andre Amaudruz, Forum, Adding Interrupt handling to SIS3100 driver
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Hello Clemens,
The hardware readout is triggered by the interrupt within this thread. The main thread poll on
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06 Aug 2014, Clemens Sauerzopf, Forum, Adding Interrupt handling to SIS3100 driver
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Hello Pierre-Andre,
thank you for your help with the interrupt handling. To close this case I'll
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07 Jul 2014, Ryu Sawada, Bug Report, mhist does not show history when -s option is used
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When I use -s option of mhist, it does not show history, for example.
[code]
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06 Jun 2014, Alexey Kalinin, Forum, problem with writing data on disk
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Hello,
Our experiment based on MIDAS 2.x DAQ.
I'm using several identical frontend-%d with only lam source & event id changed,
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16 Jun 2014, Alexey Kalinin, Forum, problem with writing data on disk
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Hello, once again.
What I found is when I tryed to stop the run, mlogger still working and writing some
data, that i'm sure is not right, because frontend's are in stopped state
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18 Jun 2014, Alexey Kalinin, Forum, problem with writing data on disk
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Hello,
I'm in deppression.
I removed Everything from computer with mserver and reinstall system and midas.
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27 May 2014, Scott Oser, Suggestion, Saving ODB values in a sequencer script
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I have a possibly simple feature request for the MIDAS sequencer. It would be
helpful to be able to save an ODB key's value to a variable, for later use, and
would be the analogue of the ODBSET command. I had in mind an application where
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12 Jun 2014, Stefan Ritt, Suggestion, Saving ODB values in a sequencer script
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> I have a possibly simple feature request for the MIDAS sequencer. It would be
> helpful to be able to save an ODB key's value to a variable, for later use, and
> would be the analogue of the ODBSET command. I had in mind an application where
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12 Jun 2014, Scott Oser, Suggestion, Saving ODB values in a sequencer script
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Thanks, this seems very helpful, and we'll give it a try.
> > I have a possibly simple feature request for the MIDAS sequencer. It would be
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26 May 2014, Dan Melconian, Suggestion, "Edit-on-end" would be nice
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We use the "Edit-on-start" and it's great. But sometimes, something breaks
during the run, or you didn't realize you forgot to plug in a cable, or
whatever. It'd be nice to have an "Edit-on-end" where you could prompt the user
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26 May 2014, Stefan Ritt, Suggestion, "Edit-on-end" would be nice
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We have similar demands, and we solve it in the following:
We use a run database. In the simplest case, this can be a text file which gets written at the end of the file. The
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28 Apr 2014, Tom Stuttard, Forum, Words written as zero in Midas bank
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Hi,
I am having some trouble with the data in my Midas bank. I am filling a midas
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15 Apr 2014, Wes Gohn, Forum, C++11 error
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I am having some trouble creating a frontend that interacts with some libraries that use C++11.
The flag I added to my MIDAS Makefile to get the C++11 part of the code to work is -std=c++0x. This
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16 Apr 2014, Stefan Ritt, Forum, C++11 error
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> I am having some trouble creating a frontend that interacts with some libraries that use C++11.
>
> The flag I added to my MIDAS Makefile to get the C++11 part of the code to work is -std=c++0x. This
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16 Apr 2014, Wes Gohn, Forum, C++11 error
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> > I am having some trouble creating a frontend that interacts with some libraries that use C++11.
> >
> > The flag I added to my MIDAS Makefile to get the C++11 part of the code to work is -std=c++0x. This
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17 Apr 2014, Stefan Ritt, Forum, C++11 error
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> Thanks for the suggestion. It looks like it is instead the TRIGGER_ALL that is causing the problem. TRIGGER_ALL is defined as -1 in midas.h. If I replace
TRIGGER_ALL with 0 in the
> frontend, it compiles, but if I use -1, I get the same error. I do not think that I want my trigger mask set to 0. Do you have a suggestion of how to |
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17 Mar 2014, Zhi Li, Forum, [need help] simple example frontend for CAEN VX1721
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Dear guys,
I’m Zhi Li from China, and I’m now working on my graduation project, which now
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17 Mar 2014, Pierre-Andre Amaudruz, Forum, [need help] simple example frontend for CAEN VX1721
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Hi Li,
You mention that you've got the wavedump working. It suggests that you have a A3818
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17 Mar 2014, Zhi Li, Forum, [need help] simple example frontend for CAEN VX1721
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Hi Pierre,
Thanks for your instructions. Before I run the wavedump software, I need to load a driver file for A2818, thus I think I've got this interface of A2818.
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12 Mar 2014, Andreas Suter, Info, Windows support droped?
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In the old SVN midas world it was typically such that the Windows dll's and
exe's were ready to be used when checking out. I am not so sure this is the case
for the current version, since when I use the packed dll's and exe's (e.g.
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14 Mar 2014, Konstantin Olchanski, Info, Windows support droped?
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> In the old SVN midas world it was typically such that the Windows dll's and
> exe's were ready to be used when checking out.
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17 Mar 2014, Stefan Ritt, Info, Windows support droped?
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> The Windows executables are no longer included in the midas git repository. Old versions are still available in
> the git repository - they got pulled in during conversion from svn.
>
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11 Mar 2014, Andreas Suter, Forum, mlogger problem
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I stumbled over a problem which I cannot pin point and would appreciate suggestions.
I set up an experiment, and all of a sudden I noticed the following behaviour.
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11 Mar 2014, Stefan Ritt, Forum, mlogger problem
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[quote="Andreas Suter"]I stumbled over a problem which I cannot pin point and would appreciate suggestions.
I set up an experiment, and all of a sudden I noticed the following behaviour.
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11 Mar 2014, Andreas Suter, Forum, mlogger problem
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[quote="Stefan Ritt"][quote="Andreas Suter"]I stumbled over a problem which I cannot pin point and would appreciate suggestions.
I set up an experiment, and all of a sudden I noticed the following behaviour.
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14 Mar 2014, Konstantin Olchanski, Forum, mlogger problem
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> I stumbled over a problem which I cannot pin point and would appreciate suggestions.
>
> [nemu@lem00 2014]$ odbedit -e nemu
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14 Mar 2014, Konstantin Olchanski, Info, midas wiki updated to mediawiki 1.22.4
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The midas wiki at https://midas.triumf.ca was updated to mediawiki 1.22.4 - the latest production version.
If you see any problems, please report them to this elog. K.O. |