 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, 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, 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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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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24 May 2024, Konstantin Olchanski, Info, added ubuntu 22 arm64 cross-compilation
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Ubuntu 22 has almost everything necessary to cross-build arm64 MIDAS frontends:
# apt install g++-12-aarch64-linux-gnu gcc-12-aarch64-linux-gnu-base libstdc++-12-dev-arm64-cross
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29 May 2024, Konstantin Olchanski, Info, MIDAS RPC add support for std::string and std::vector<char>
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This is moving slowly. I now have RPC caller side support for std::string and
std::vector<char>. RPC server side is next. K.O. |
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02 Jun 2024, Konstantin Olchanski, Info, MIDAS RPC data format
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> MIDAS RPC data format.
> 3) RPC reply
> 3.1) header:
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19 Aug 2024, Konstantin Olchanski, Release, kernel-module-universe updated to -KO7
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The linux kernel driver for the Universe-II VME to PCI bridge is updated to
version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.
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19 Aug 2024, Konstantin Olchanski, Release, kernel-module-universe updated to -KO7
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> The linux kernel driver for the Universe-II VME to PCI bridge is updated to
> version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.
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19 Aug 2024, Konstantin Olchanski, Release, kernel-module-universe updated to -KO7
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> > The linux kernel driver for the Universe-II VME to PCI bridge is updated to
> > version -KO7. It now builds and runs with Debian-12 stock kernel 6.1.0-22-686.
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11 Sep 2024, Konstantin Olchanski, Info, News MSCB++ API
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> Here is some example code:
>
> #include "mscbxx.h"
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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> I'm trying to get a sense of the rate limitations of a python frontend.
1) python is single-threaded, for ultimate performance, a MIDAS frontend (or any DAQ
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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>
> poll(INT count) {
> for (i=0 ; i<count ; i++)
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11 Sep 2024, Konstantin Olchanski, Forum, Python frontend rate limitations?
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> > I'm trying to get a sense of the rate limitations of a python frontend.
forgot one more:
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11 Sep 2024, Konstantin Olchanski, Bug Report, Multiple issues with mhist
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I think I can offer some insight into your problems:
1) your mhist crash is due to the ODB timeout, it is probably set to 30 seconds in ODB /programs/mhist. you will
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11 Sep 2024, Konstantin Olchanski, Suggestion, Improve Event Documentation
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> I am writing a Rust based midas file reader however it was kind of hard to understand the full midas file
> structure from the documentation.
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11 Sep 2024, Konstantin Olchanski, Info, Help parsing scdms_v1 data?
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Look at the C++ implementation of the MIDAS data file reader, the code is very
simple to follow.
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11 Sep 2024, Konstantin Olchanski, Info, mana.cxx
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> Ok, no relevant complains so far, so I removed mana and rmana from the CMake build
> process, but left the file mana.cxx still in the repository for educational
> purposes ;-)
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11 Sep 2024, Konstantin Olchanski, Forum, "Safe" abort of sequencer scripts
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> We often use the MIDAS sequencer to temporarily control detector settings, such as:
>
> * <change some setting>
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12 Sep 2024, Konstantin Olchanski, Bug Fix, bitbucket builds repaired
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bitbucket builds work again, also added ubuntu-24 and almalinux-9.
two problems fixed:
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