 16 Sep 2019, Konstantin Olchanski, Info, New history plot facility
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> I see currently quite often is the error hs_read_arraybuffer (see the
attachement).
> Are there ways to get a log which would document where the problems
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16 Sep 2019, Konstantin Olchanski, Info, New history plot facility
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> During my visit at TRIUMF we rewrote the history plotting functionality of midas.
This is a most amazing achievement. We wanted to do this "for years" and I think we have
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16 Sep 2019, Stefan Ritt, Info, New history plot facility
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> Also the new system is still incomplete, i.e. there is no trivial way to save a history plot into a file:
That has been implemented in meantime. Just click on the download arrow and you can save the current window in CSV or PNG format.
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17 Sep 2019, Andreas Suter, Info, New history plot facility
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> On the mhttpd side, please capture the stack trace from the crash: enable
> core dumps (ODB "/experiment/enable core dumps" set to "y", after the crash,
> run "ls -l core.*; gdb mhttpd core.9999") or run mhttpd inside gdb or attach
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17 Sep 2019, Konstantin Olchanski, Info, New history plot facility
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> > On the mhttpd side, please capture the stack trace from the crash
>
> here comes the stack trace (only happens when using safari 12.1.2 macOS 10.14.6):
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 18 Oct 2019, Joseph McKenna, Info, sysmon: New system monitor and performance logging frontend added to MIDAS 
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I have written a system monitor tool for MIDAS, that has been merged in the develop branch today: sysmon
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03 Dec 2019, Joseph McKenna, Info, mfe.c: MIDAS frontend's 'Equipment name' can embed hostname, determined at run-time
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A little advertised feature of the modifications needed support the msysmon program is
that MIDAS equipment names can support the injecting of the hostname of the system
running the frontend at runtime (register_equipment(void)).
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06 Dec 2019, Konstantin Olchanski, Info, c++11 for RHEL/SL/CentOS-6
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> The default el6 (RHEL/SL/CentOS-6) compiler is gcc-4.4.7, it does not support c++11, not even a little bit.
The previously posted instructions are incomplete - one cannot cross-compile 32-bit executables (i.e. for running on 32-bit VME
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12 Jan 2020, Konstantin Olchanski, Info, midas on centos-8 status
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I now have a centos-8 computer and I tried midas on it:
- the develop and midas-2019-09 branches build, mhttpd runs
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13 Jan 2020, Konstantin Olchanski, Info, How to convert C midas frontends to C++, CAEN libraries
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Big thanks to Peter Kunz - specifically when using the CAEN libraries:
>
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13 Jan 2020, Konstantin Olchanski, Info, status of self-signed https certificates
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Now firefox returns the same error. version 72.0.1.
> daqlabpc.triumf.ca has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You |
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29 Jan 2020, Pintaudi Giorgio, Info, Force triggering of idle routine of a frontend
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Hello!
As you know, the generic MIDAS frontend has a class driver, device driver, bus driver
structure. Assuming a slow device frontend, its class driver should have a routine of type
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02 Feb 2020, Konstantin Olchanski, Info, Force triggering of idle routine of a frontend
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Hi, Giorgio - I think you encountered a fundamental problem with what to do at the begin of
run. There are two ways of thinking about it.
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02 Feb 2020, Pintaudi Giorgio, Info, Force triggering of idle routine of a frontend
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Dear Konstantin,
thank you very much for the explanation. I already have an idea of how to solve my problem by bypassing the class driver altogether or by slightly modifying
the mfe.cxx frontend.
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03 Feb 2020, Stefan Ritt, Info, Force triggering of idle routine of a frontend
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It is important to note that slow control readout and sending of midas events are two separate things. Readout is done as fast as possible, even multi-threaded
if selected. On fast devices this can be 100 Hz readout rate and even more. This data is stored in an internal buffer. When one of the values changes by
more than the update threshold, then the ODB gets updated. The midas events are composed from this internal buffer when a new event has to be sent. This |
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04 Feb 2020, Pintaudi Giorgio, Info, Force triggering of idle routine of a frontend
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Dear Stefan,
thank you very much for the clarification. I knew about the DF_XXX flags and I am making good use of them in all my frontends. Anyway, what I really needed
was to change the readout rate depending on the run status (in particular DF_RUNNING or DF_TRANSITION).
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07 Feb 2020, Stefan Ritt, Info, Force triggering of idle routine of a frontend
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Dear Giorgio,
ok, now I'm slowly getting your point.
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07 Feb 2020, Pintaudi Giorgio, Info, Force triggering of idle routine of a frontend
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Dear Stefan,
Thank you for the advice. I will try to modify the driver as you say. As for the dynamical change of readout rate, basically you are telling me that is
not achievable without dirty hacks like mine and it is better to find a way to avoid it.
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09 Feb 2020, Stefan Ritt, Info, Force triggering of idle routine of a frontend
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You dirty hacks will probably work, but what you REALLY want is to read out your HV always as fast as possible, not only during run transitions or ramping.
We had a case where a detector produced electrostatic discharges which only lasted for a second or so, and we were happy to detect this in spikes in the
HV current. With measurements of only one per minute we would not have realized that so quicky.
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10 Feb 2020, Konstantin Olchanski, Info, Force triggering of idle routine of a frontend
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> We had a case where a detector produced electrostatic discharges which only lasted for a second or so
> and we were happy to detect this in spikes in the HV current. With measurements of only one per minute
> we would not have realized that so quicky.
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