I agree with you, option 2 is better and works well. 
The only problem is that if you are showing multiple histograms in the same window the keyDown even will affect all of the histories in the window. 
This may be the intended behaviour, but I think that if we can find a way to have the event affecting only the intended history (focused element for example) it would be better.

Zaher 

> > The histories capture key events from 'r' 'u' 'y' and 'Escape' for various functions like rescaling etc. However, this also means that if we include an editable modbvalue and a history in the same custom page then changing the modbvalue to something that includes 'ruy' is not possible.
> > 
> > In mhistory.js we have
> > 
> > // Keyboard event handler (has to be on the window!)
> > window.addEventListener("keydown", this.keyDown.bind(this));
> > 
> > I am not sure why it "has to be on the window". For now, I am bypassing this issue by changing the event listener to "keyup" but maybe there is a more elegant solution for this. Adding the event listener to the div element that includes the history does not seem to work.
> 
> I could reproduce the problem. I see two options there:
> 
> 1) We replace 'r' with 'Ctrl-r' etc. 
> 
> 2) We change the history JS code not to process keyboard inputs if we are currently editing a value.
> 
> I added 2) to give it a try. It works fine for me. The additional code is
> 
> MhistoryGraph.prototype.keyDown = function (e) {
>    // don't consume events if we are editing a value
>    if (e.target.tagName === "INPUT")
>       return;
>    ...
> }
> 
> 
> Feedback is welcome.
> 
> Stefan

> I agree with you, option 2 is better and works well. 
> The only problem is that if you are showing multiple histograms in the same window the keyDown even will affect all of the histories in the window. 
> This may be the intended behaviour, but I think that if we can find a way to have the event affecting only the intended history (focused element for example) it would be better.

The history panels are simple pictures from the perspective of the browser and have no concept of a focus. This would have to be tweaked somehow. If you want to reset a single history, 
just click on its reset button (circle arrow at the right top).

Stefan

is there a reason why histograms are not saved after a replay?

   /* save histos if requested */
   if (out_info.histo_dump && clp.online) {
                              ^^^^^^^^^^

perhaps the && should be ||?

> is there a reason why histograms are not saved after a replay?
> 
>    /* save histos if requested */
>    if (out_info.histo_dump && clp.online) {
>                               ^^^^^^^^^^
> 
> perhaps the && should be ||?

The original reason for that is the for running online, you want some histos for
monitoring after each run. For running offline, you specify a root output file via
"-o xxx.root" which contains trees AND histos. So the histos would there be twice
if you remove the "clp.online" from above.

Having "-o xxx.root" is IMHO a cleaner way, since you might want to analyze a run
in different ways (like using different calibrations). So what you do is specify
different "-o cal00123.root", "-o final00123.root" and so on, while with the
mechanism in eor() you always get the same file name. So try using "-o xxx.root"
and see if that fits your needs.

To support IPV6, we need to migrate MIDAS from gethostbyname() to getaddrinfo(). (Thanks to 
http://www.openwall.com/lists/oss-security/2015/01/27/9). K.O.

Hi all, 

I have a Mac with OS 10.13.6 and Xcode 10.1. I am following the instructions in the wiki to install Midas. 
I have installed openssl via MacPorts as per the instructions. But then I get an error related to open ssl 
when I try to compile Midas. See the results of cmake .. and make install 

Darrens-Mac-mini:build betacage$ cmake ..
-- MIDAS: cmake version: 3.16.3
-- MIDAS: CMAKE_INSTALL_PREFIX: /Users/betacage/packages/midas
-- MIDAS: Found ROOT version 6.18/04
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS: Found OpenSSL version 1.1.1d
-- MIDAS: MySQL not found
-- MIDAS: ODBC not found
-- MIDAS: Found SQLITE /usr/include/sqlite3.h
-- MIDAS: nvidia-smi not found
-- MIDAS example/experiment: MIDAS in-tree-build
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS example/experiment: Found ROOT version 6.18/04
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/betacage/packages/midas/build
Darrens-Mac-mini:build betacage$ make install 
[  1%] Built target mfeo
[  3%] Built target mfe
[  4%] Built target rmana
[  5%] Built target manao
[  6%] Built target mana
[  6%] Built target git_revision_h
[ 30%] Built target objlib
[ 31%] Built target midas
[ 32%] Built target rmanao
[ 32%] Built target objlib-c-compat
[ 32%] Built target midas-c-compat
[ 33%] Built target midas-shared
[ 35%] Built target rmlogger
[ 36%] Linking CXX executable mhttpd
Undefined symbols for architecture x86_64:
  "_OPENSSL_init_ssl", referenced from:
      _mg_mgr_init in mongoose6.cxx.o
  "_SSL_CTX_set_options", referenced from:
      _mg_set_ssl in mongoose6.cxx.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [progs/mhttpd] Error 1
make[1]: *** [progs/CMakeFiles/mhttpd.dir/all] Error 2
make: *** [all] Error 2


I hope that this is the right forum to submit this kind of reports.
Any idea what do I have to do to continue ? Thanks is advance !

Berta 

Hi, yes, this is the right place to report problems and to ask questions about midas.

As for your trouble, I have the same macos 10.13.6, so we should be able to figure out what goes wrong.

Unfortunately, the posted instructions (to run cmake directly) hide all the information needed to debug build problems.

Instead of "cd build; cmake ..", please run "make cmake" and post the output. Printed should be all the compiler
and linker commands executed by the build. You can examine the mhttpd linker command to see if somehow
the wrong openssl library is being used.

If you do not need built-in https support in mhttpd, you can run "make cmake NO_SSL=1".

K.O.

> Hi all, 
> 
> I have a Mac with OS 10.13.6 and Xcode 10.1. I am following the instructions in the wiki to install Midas. 
> I have installed openssl via MacPorts as per the instructions. But then I get an error related to open ssl 
> when I try to compile Midas. See the results of cmake .. and make install 
> 
> Darrens-Mac-mini:build betacage$ cmake ..
> -- MIDAS: cmake version: 3.16.3
> -- MIDAS: CMAKE_INSTALL_PREFIX: /Users/betacage/packages/midas
> -- MIDAS: Found ROOT version 6.18/04
> -- MIDAS: Found ZLIB version 1.2.11
> -- MIDAS: Found OpenSSL version 1.1.1d
> -- MIDAS: MySQL not found
> -- MIDAS: ODBC not found
> -- MIDAS: Found SQLITE /usr/include/sqlite3.h
> -- MIDAS: nvidia-smi not found
> -- MIDAS example/experiment: MIDAS in-tree-build
> -- MIDAS: Found ZLIB version 1.2.11
> -- MIDAS example/experiment: Found ROOT version 6.18/04
> -- Configuring done
> -- Generating done
> -- Build files have been written to: /Users/betacage/packages/midas/build
> Darrens-Mac-mini:build betacage$ make install 
> [  1%] Built target mfeo
> [  3%] Built target mfe
> [  4%] Built target rmana
> [  5%] Built target manao
> [  6%] Built target mana
> [  6%] Built target git_revision_h
> [ 30%] Built target objlib
> [ 31%] Built target midas
> [ 32%] Built target rmanao
> [ 32%] Built target objlib-c-compat
> [ 32%] Built target midas-c-compat
> [ 33%] Built target midas-shared
> [ 35%] Built target rmlogger
> [ 36%] Linking CXX executable mhttpd
> Undefined symbols for architecture x86_64:
>   "_OPENSSL_init_ssl", referenced from:
>       _mg_mgr_init in mongoose6.cxx.o
>   "_SSL_CTX_set_options", referenced from:
>       _mg_set_ssl in mongoose6.cxx.o
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
> make[2]: *** [progs/mhttpd] Error 1
> make[1]: *** [progs/CMakeFiles/mhttpd.dir/all] Error 2
> make: *** [all] Error 2
> 
> 
> I hope that this is the right forum to submit this kind of reports.
> Any idea what do I have to do to continue ? Thanks is advance !
> 
> Berta 

I tried on my Mac (macOS 10.14.6, Xcode 11.3.1, current develop branch, openssl 1.1.1d) and it woks fine. Below is the transcript. I 
see that your cmake output is much shorter (no C compiler listed etc.). Did you remove some lines? For such comparisons, it's 
always good to start with an empty build directory.

OpenSSL libraries are the same (1.1.1d). Just for comparison, I run the build process with "make VERBOSE=1" and extract the line 
which fails for you when linking mhttp, so maybe you can compare.

Linking mhttpd
---------------

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -O2 -g -DNDEBUG -isysroot 
/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -mmacosx-version-
min=10.14 -Wl,-search_paths_first -Wl,-headerpad_max_install_names  CMakeFiles/mhttpd.dir/mhttpd.cxx.o 
CMakeFiles/mhttpd.dir/mongoose6.cxx.o CMakeFiles/mhttpd.dir/mgd.cxx.o CMakeFiles/mhttpd.dir/__/mscb/src/mscb.cxx.o  -o 
mhttpd  -L/opt/local/lib/mysql57/mysql -lmysqlclient -lz ../libmidas.a /opt/local/lib/libssl.dylib /opt/local/lib/libcrypto.dylib -lz -
L/opt/local/lib/mysql57/mysql -lmysqlclient -lz 


Here is the full transcript
-------------------------

/midas/build$ cmake ..
-- MIDAS: cmake version: 3.16.3
-- The C compiler identification is AppleClang 11.0.0.11000033
-- The CXX compiler identification is AppleClang 11.0.0.11000033
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc -- 
works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++
-- Check for working CXX compiler: 
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- MIDAS: CMAKE_INSTALL_PREFIX: /midas
-- MIDAS: Found ROOT version 6.16/00
-- Found ZLIB: /opt/local/lib/libz.dylib (found version "1.2.11") 
-- MIDAS: Found ZLIB version 1.2.11
-- Found OpenSSL: /opt/local/lib/libcrypto.dylib (found version "1.1.1d")  
-- MIDAS: Found OpenSSL version 1.1.1d
-- MIDAS: Found MySQL version 5.7.26
-- MIDAS: ODBC not found
-- MIDAS: SQLITE not found
-- MIDAS: nvidia-smi not found
-- Setting default build type to "RelWithDebInfo"
-- Found Git: /usr/bin/git (found version "2.21.1 (Apple Git-122.3)") 
-- MIDAS example/experiment: MIDAS in-tree-build
-- MIDAS: Found ZLIB version 1.2.11
-- MIDAS example/experiment: Found ROOT version 6.16/00
-- Configuring done
-- Generating done
-- Build files have been written to: /midas/build
/midas/build$ make
Scanning dependencies of target rmana
Scanning dependencies of target git_revision_h
Scanning dependencies of target mfe
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[  0%] Building CXX object CMakeFiles/objlib-c-compat.dir/src/midas_c_compat.cxx.o
[  2%] Building CXX object CMakeFiles/mfe.dir/src/mfe.cxx.o
[  2%] Building CXX object CMakeFiles/mfeo.dir/src/mfe.cxx.o
[  3%] Building CXX object CMakeFiles/mana.dir/src/mana.cxx.o
[  4%] Building CXX object CMakeFiles/manao.dir/src/mana.cxx.o
[  5%] Building CXX object CMakeFiles/rmanao.dir/src/mana.cxx.o
[  6%] Building CXX object CMakeFiles/rmana.dir/src/mana.cxx.o
[  6%] Built target git_revision_h
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[  7%] Building CXX object CMakeFiles/objlib.dir/src/midas.cxx.o
[  7%] Built target objlib-c-compat
[  8%] Building CXX object CMakeFiles/objlib.dir/src/midas_cxx.cxx.o
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[  8%] Building CXX object CMakeFiles/objlib.dir/src/odb.cxx.o
[  8%] Built target mana
[  9%] Building CXX object CMakeFiles/objlib.dir/src/device_driver.cxx.o
[  9%] Built target mfeo
[ 10%] Linking CXX static library libmfe.a
[ 11%] Building CXX object CMakeFiles/objlib.dir/src/system.cxx.o
[ 11%] Built target mfe
[ 11%] Building CXX object CMakeFiles/objlib.dir/src/alarm.cxx.o
[ 12%] Building CXX object CMakeFiles/objlib.dir/src/elog.cxx.o
[ 13%] Building CXX object CMakeFiles/objlib.dir/src/mrpc.cxx.o
[ 13%] Building CXX object CMakeFiles/objlib.dir/src/mjson.cxx.o
[ 14%] Building CXX object CMakeFiles/objlib.dir/src/tmfe.cxx.o
[ 15%] Building CXX object CMakeFiles/objlib.dir/src/mvodb.cxx.o
[ 15%] Built target rmanao
[ 15%] Linking CXX static library librmana.a
[ 16%] Building CXX object CMakeFiles/objlib.dir/src/nullodb.cxx.o
[ 16%] Building CXX object CMakeFiles/objlib.dir/src/midasodb.cxx.o
[ 16%] Built target rmana
[ 17%] Building CXX object CMakeFiles/objlib.dir/src/mxmlodb.cxx.o
[ 18%] Building CXX object CMakeFiles/objlib.dir/src/mjsonodb.cxx.o
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[ 20%] Building CXX object CMakeFiles/objlib.dir/src/mjsonrpc_user.cxx.o
[ 21%] Building CXX object CMakeFiles/objlib.dir/src/history.cxx.o
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[ 23%] Building CXX object CMakeFiles/objlib.dir/src/lz4.cxx.o
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[ 25%] Building CXX object CMakeFiles/objlib.dir/src/lz4hc.cxx.o
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[ 30%] Building CXX object CMakeFiles/objlib.dir/mxml/mxml.cxx.o
[ 31%] Building CXX object CMakeFiles/objlib.dir/mxml/strlcpy.cxx.o
[ 31%] Built target objlib
Scanning dependencies of target midas-shared
Scanning dependencies of target midas
[ 33%] Linking CXX shared library libmidas-shared.dylib
[ 33%] Linking CXX static library libmidas.a
[ 33%] Built target midas-shared
[ 33%] Built target midas
Scanning dependencies of target mhttpd
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[ 33%] Building CXX object progs/CMakeFiles/mfe_link_test.dir/mfe_link_test.cxx.o
[ 33%] Linking CXX shared library libmidas-c-compat.dylib
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[ 35%] Building CXX object progs/CMakeFiles/msysmon.dir/msysmon.cxx.o
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[ 37%] Building CXX object progs/CMakeFiles/odb_lock_test.dir/odb_lock_test.cxx.o
[ 38%] Building CXX object progs/CMakeFiles/rmlogger.dir/mlogger.cxx.o
[ 39%] Building CXX object progs/CMakeFiles/mhttpd.dir/mhttpd.cxx.o
[ 39%] Built target midas-c-compat
[ 40%] Building CXX object progs/CMakeFiles/mhttpd.dir/mongoose6.cxx.o
[ 41%] Linking CXX executable mfe_link_test
[ 42%] Linking CXX executable odb_lock_test
[ 42%] Built target mfe_link_test
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[ 43%] Building CXX object progs/CMakeFiles/mjson_test.dir/mjson_test.cxx.o
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[ 44%] Building CXX object progs/CMakeFiles/odbinit.dir/odbinit.cxx.o
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/midas/build$ 

>
> .../c++  ...  /opt/local/lib/libssl.dylib
>

I get the same, libssl from /opt/local, so we are not using openssl shipped with mac os.

We still do not know were OP's libssl comes from and if there is a mismatch between
openssl header files and library (header files from one openssl, library from a different openssl).

OP's cmake output: (no VERBOSE=1)
> -- MIDAS: cmake version: 3.16.3
> -- MIDAS: Found OpenSSL version 1.1.1d

Stefan's and my cmake output: (VERBOSE=1)
> -- MIDAS: cmake version: 3.16.3
> -- Found OpenSSL: /opt/local/lib/libcrypto.dylib (found version "1.1.1d")  
> -- MIDAS: Found OpenSSL version 1.1.1d

Without VERBOSE=1 cmake does not tell is which OpenSSL it found (not useful).
With VERBOSE=1 cmake outputs a flood of gunk (not useful).

My solution is to filter the cmake output with grep in "make cmake" ("make cmake3").

So please use that: "make cmake" - the output is roughly the same as normal make - compiler command lines (CFLAGS, library paths, etc),
compiler error message and all of the useful cmake output.

K.O.

Hi all,

I have just compiled midas 4401 using SuSE 11.0.
gcc is some odd SuSE version:
gcc version 4.3.1 20080507 (prerelease) [gcc-4_3-branch revision 135036] (SUSE
Linux) 

Anyway, gcc stumbled over melog.c. I don't see the reason myself, but my
experience is that gcc is usually right when complaining about "array subscript
is above array bounds". So, just in case somebody knowlegeable wants to have a
look at this....

Cheers,

Randolf

The gcc output:

[...]
cc -g -O3 -Wall -Wuninitialized -Iinclude -Idrivers -I../mxml -Llinux/lib
-DINCLUDE_FTPLIB   -D_LARGEFILE64_SOURCE -DHAVE_MYSQL -I/usr/include/mysql
-DHAVE_ROOT -pthread -m64 -I/usr/local/root/root_v5.20.00/include/root
-DHAVE_ZLIB -DOS_LINUX -fPIC -Wno-unused-function -o linux/bin/melog
utils/melog.c linux/lib/libmidas.a -lutil -lpthread -lz
utils/melog.c: In function 'submit_elog':
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
utils/melog.c:224: warning: array subscript is above array bounds
cc -g -O3 -Wall -Wuninitialized -Iinclude -Idrivers -I../mxml -Llinux/lib
-DINCLUDE_FTPLIB   -D_LARGEFILE64_SOURCE -DHAVE_MYSQL -I/usr/include/mysql
-DHAVE_ROOT -pthread -m64 -I/usr/local/root/root_v5.20.00/include/root
-DHAVE_ZLIB -DOS_LINUX -fPIC -Wno-unused-function -o linux/bin/mlxspeaker
utils/mlxspeaker.c linux/lib/libmidas.a -lutil -lpthread -lz

Sorry the previous message got mangled:

Hi, 
I think that rather than spending too much time on where to put files 
and how to define the environment - I am guilty of that myself -  we should 
perhaps have some discussion on the future of MIDAS. 

Are we ready for 2.0? 

Stefan - do you have any ideas/enhancements? 

1) For one I would like to explore memory mapping (mmap()) on Linux.
I've used it once upon a time on DEC OSF/1 and I found it really nice 
compared to shared memory. From a user standpoint it behaves as a shared
memory but is mapped to a real file that can be easily "removed" when 
neccessary. One really annoying thing in MIDAS is when it goes ballistic 
the cleanup is somewhat tricky. 
The question if there is any performance penalty associated 

2) Expanding hardware support: 
  a) custom microcontrolers? 
  b) other hardware
  c) how about a "standard" Linux device /dev/midas for various 
  PCI cards (PCI<->CAMAC) (PCI<->VME) 

3) I have never really seen a midas deployment that uses interrupts. 
I do understand the ease of polling and the fact that these days CPU's 
are cheap but sometimes it is important to use interrupts. 

Any examples/experience? 

?) 

Piotr

Hi,
  I think that rather than spending too much time on where to 
put files and how to define the environment - I am guilty of that myself.
We should be perhaps have some discussion on the future of MIDAS.

Are we ready for 2.0? 
Stefan - do you have any ideas/enhancements?

1) For one I would like to explore memory mapping (mmap()) on Linux
- I've used it once upon a time on DEC OSF/1 and I found it really
nice compared to shared memory. 
From a user standpoint it behaves as a shared memory but is mapped 
to a real file that can be easily "removed" when neccessary. 
One really annoying thing in MIDAS is when it goes ballistic
the cleanup which is somewhat tricky. 
The question if there is any performance penalty associated

2) Expanding hardware support: 
   a) custom microcontrolers?
   b) more hardware
   c) how about a "standard" Linux device /dev/midas
   for various PCI cards (PCI<->CAMAC) (PCI<->VME) 

3) I have never really seen a midas deployment that uses interrupts. 
I do understand the ease of polling and the fact that these days
CPU's are cheap but sometimes it is important to use interrupts.
Any examples/experience?

?)

Piotr

Have changed your entry as Non-HTML (easier to reply to...)

Here are some "initial" comments, by no means complete...

> Are we ready for 2.0? 
> Stefan - do you have any ideas/enhancements?

A big thing along the horizon I see is the ROME environment
(http://midas.psi.ch/rome/). So we will move away from PAW to ROOT. Although
the DAQ part will stay untouched, the whole analysis back-end changes,
including some XML configuration and MySQL support. I guess that would justify
a 2.0. I will discuss this at TRIUMF when I come in September, see how useful
ROME is for other users...

> 1) For one I would like to explore memory mapping (mmap()) on Linux
> - I've used it once upon a time on DEC OSF/1 and I found it really
> nice compared to shared memory. 
> From a user standpoint it behaves as a shared memory but is mapped 
> to a real file that can be easily "removed" when neccessary. 
> One really annoying thing in MIDAS is when it goes ballistic
> the cleanup which is somewhat tricky. 
> The question if there is any performance penalty associated

I guess there are no performance penalties, since under the hood both
techniques are handled similarly. The problem is that besides share memories
you need also semaphores to controll exclusive access to the memory, either
shm() funcitons or mmap(), so this would only fix half of the problem. I seem
to remember that mmap() was not available on some Ultix systems or so, but I
guess that's obsolete by now...

> 2) Expanding hardware support: 
>    a) custom microcontrolers?
>    b) more hardware
>    c) how about a "standard" Linux device /dev/midas
>    for various PCI cards (PCI<->CAMAC) (PCI<->VME) 

Well, you cannot develop hardware support for hardware you don't have, so the
policy up to now was that everyone developing some special drivers or hardware
support contributed it to the package. About c), we have already a CAMAC
driver standard, but at the user space level, so I don't see the benefit of
having kernel-mode standardized drivers. The only difference will be that the
debugging will be harder. VME standard is there in a kind of poor start right
now, but I expect to finish it this fall.

As for a), there is the MSCB system (http://midas.psi.ch/mscb) which has midas
support on the device driver and bus driver level, but I learned that
distributing hardware (or PCB designs if you like) is much harder than sharing
software. 

> 3) I have never really seen a midas deployment that uses interrupts. 
> I do understand the ease of polling and the fact that these days
> CPU's are cheap but sometimes it is important to use interrupts.
> Any examples/experience?

It's not only the "ease" of polling, but also that it's faster (in almost all
cases) and less troublesome. But hey, interrupt support is included in mfe.c,
so if you are fanatic about interrupts, please feel free to use them.

> > Are we ready for 2.0? 

I disapprove of version number inflation. Why not go straight for midas version
3000-Pro-Z?

> A big thing along the horizon I see is the ROME environment
> (http://midas.psi.ch/rome/). So we will move away from PAW to ROOT. Although
> the DAQ part will stay untouched, the whole analysis back-end changes,
> including some XML configuration and MySQL support.

I looked at the ROME slides from Pierre, and it seems to suffer badly from the
second-system syndrome (read The Mythical Man-Month).

For us, it is important to get the data into a form where we can process it with
ROOT and I would prefer if we could concentrate in improving the (embryonic) ROOT
online analysis capabilities.

> > 1) For one I would like to explore memory mapping (mmap())

It is trivial to replace System-V shared memory with mmap(). I am surprised that
it has not been done yet. System-V semaphores are a little bit harder to get rid of.

> > 2) Expanding hardware support: 
> >    a) custom microcontrolers?
> >    b) more hardware
> >    c) how about a "standard" Linux device /dev/midas
> >    for various PCI cards (PCI<->CAMAC) (PCI<->VME) 

We cannot expect MIDAS Authors to provide drivers for all possible hardware.

At best, we can mount an effort to collect exisiting drivers from all MIDAS users
"out there" and to integrate them into MIDAS.

Even that is highly non-trivial- many drivers use non-portable native hardware
access interfaces (direct bit-banging on PPCs, VMIC library on VMIC Linux
machines, etc). We have already failed to create an efficient generic portable VME
access library.

> As for a), there is the MSCB system (http://midas.psi.ch/mscb)

I never saw the point of having tons of MIDAS code for MSCB hardware that nobody
has and nobody will ever have.

> > 3) I have never really seen a midas deployment that uses interrupts. 
>
> It's not only the "ease" of polling, but also that it's faster (in almost all
> cases) and less troublesome. But hey, interrupt support is included in mfe.c,
> so if you are fanatic about interrupts...

Interrupts are important when one cannot afford chewing up CPU cycles, memory
cycles, PCI cycles and VME cycles on polling.

As I understand, common CAMAC hardware does not generate interrupts- this explains
lack of examples and lack of interrupt use. At TRIUMF, our new VME hardware
supports interrupts and I have a VMIC-based setup where I can (and intend to) test
MIDAS support of interrupts.

K.O.

After upgrading to the lastes MIDAS version I got the DAQ frontend of my application running by changing all compiler directives from cc to g++ and using

#include "mfe.h"

extern HNDLE hDB

 extern "C" { 
 #include <CAENComm.h>  
 }

With these changes everything seems to work fine.

However, I'm having trouble with a slow control frontend using a tcpip driver. It compiled well with the older MIDAS version. Even though all the functions in question are defined in the frontend code, the following error comes up:

 I guess the the aforementioned DAQ frontend compiles because its equipment definitions don't call on the function `initialize_equipment()', but I can't figure out why it doesn't work. Help is appreciated. P.K.

(please use the "plain" text, much easier to answer).

Hi, Peter, I think you misread the error message. There is no error about initialize_equipment(), the error 
is about interrupt_configure(). initialize_equipment() is just one of the functions that calls it.

The cause of the error most likely is a mismatch between the declaration of interrupt_configure() in 
mfe.h and the definition of this function in your program (in feMotor.c, I guess).

Sometimes this mismatch is hard to identify just by looking at the code.

One fool-proof method to debug this is to extract the actual function prototypes from your object files, 
both the declaration ("U") in mfe.o and the definition ("T") in your program should be identical:

nm feMotor.o |  grep -i interrupt | c++filt
0000000000000f90 T interrupt_configure(int, int, long) <--- should be this

nm ~/packages/midas/lib/libmfe.a | grep -i interrupt | c++filt
U interrupt_configure(int, int, long)

If they are different, you adjust your program until they match. One way to ensure the match is to copy 
the declaration from mfe.h into your program.

K.O.




<p>&nbsp;</p>

<table align="center" cellspacing="1" style="border:1px solid #486090; width:98%">
	<tbody>
		<tr>
			<td style="background-color:#486090">Peter Kunz wrote:</td>
		</tr>
		<tr>
			<td style="background-color:#FFFFB0">
			<p>After upgrading to the lastes MIDAS version I got the DAQ frontend of my application 
running by changing all compiler directives from cc to g++ and using</p>

			<p>#include &quot;mfe.h&quot;</p>

			<p>extern HNDLE hDB</p>

			<p>&nbsp;extern &quot;C&quot; {&nbsp;<br />
			&nbsp;#include &lt;CAENComm.h&gt; &nbsp;<br />
			&nbsp;}</p>

			<p>With these changes everything seems to work fine.</p>

			<p>However, I&#39;m having trouble with a slow control frontend using a tcpip driver. It 
compiled well with the older MIDAS version. Even though all the functions in question are defined in the 
frontend code, the following error comes up:</p>

			<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;">g++ -o feMotor 
-DOS_LINUX -Dextname -g -O2 -fPIC -Wall -Wuninitialized &nbsp;-fpermissive -
I/home/pkunz/packages/midas/include -I. -I/home/pkunz/packages/midas/drivers/bus &nbsp; 
/home/pkunz/packages/midas/lib/libmidas.a feMotor.o 
/home/pkunz/packages/midas/drivers/bus/tcpip.o cd_Galil.o 
/home/pkunz/packages/midas/lib/libmidas.a /home/pkunz/packages/midas/lib/mfe.o -lm -lz -lutil -lnsl -
lpthread -lrt<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
`initialize_equipment()&#39;:<br />
			/home/pkunz/packages/midas/src/mfe.cxx:687: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
`readout_enable(unsigned int)&#39;:<br />
			/home/pkunz/packages/midas/src/mfe.cxx:1236: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:1238: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function `main&#39;:<br />
			/home/pkunz/packages/midas/src/mfe.cxx:2791: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:2792: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			collect2: error: ld returned 1 exit status<br />
			make: *** [Makefile:36: feMotor] Error 1</div>

			<p>&nbsp;I guess the the aforementioned DAQ frontend compiles because its equipment 
definitions don&#39;t call on the function `initialize_equipment()&#39;, but I can&#39;t figure out why 
it doesn&#39;t work. Help is appreciated. P.K.</p>
			</td>
		</tr>
	</tbody>
</table>

<p>&nbsp;</p>

(please use the "plain" text, much easier to answer).

Hi, Peter, I think you misread the error message. There is no error about 
initialize_equipment(), the error is about interrupt_configure(). initialize_equipment() is just 
one of the functions that calls it.

The cause of the error most likely is a mismatch between the declaration of 
interrupt_configure() in mfe.h and the definition of this function in your program (in 
feMotor.c, I guess).

Sometimes this mismatch is hard to identify just by looking at the code.

One fool-proof method to debug this is to extract the actual function prototypes from your 
object files, both the declaration ("U") in mfe.o and the definition ("T") in your program 
should be identical:

nm feMotor.o |  grep -i interrupt | c++filt
0000000000000f90 T interrupt_configure(int, int, long) <--- should be this

nm ~/packages/midas/lib/libmfe.a | grep -i interrupt | c++filt
U interrupt_configure(int, int, long)

If they are different, you adjust your program until they match. One way to ensure the 
match is to copy the declaration from mfe.h into your program.

K.O.




<p>&nbsp;</p>

<table align="center" cellspacing="1" style="border:1px solid #486090; width:98%">
	<tbody>
		<tr>
			<td style="background-color:#486090">Peter Kunz wrote:</td>
		</tr>
		<tr>
			<td style="background-color:#FFFFB0">
			<p>After upgrading to the lastes MIDAS version I got the DAQ frontend of my 
application running by changing all compiler directives from cc to g++ and using</p>

			<p>#include &quot;mfe.h&quot;</p>

			<p>extern HNDLE hDB</p>

			<p>&nbsp;extern &quot;C&quot; {&nbsp;<br />
			&nbsp;#include &lt;CAENComm.h&gt; &nbsp;<br />
			&nbsp;}</p>

			<p>With these changes everything seems to work fine.</p>

			<p>However, I&#39;m having trouble with a slow control frontend using a 
tcpip driver. It compiled well with the older MIDAS version. Even though all the functions in 
question are defined in the frontend code, the following error comes up:</p>

			<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;">g++ 
-o feMotor -DOS_LINUX -Dextname -g -O2 -fPIC -Wall -Wuninitialized &nbsp;-fpermissive 
-I/home/pkunz/packages/midas/include -I. -I/home/pkunz/packages/midas/drivers/bus 
&nbsp; /home/pkunz/packages/midas/lib/libmidas.a feMotor.o 
/home/pkunz/packages/midas/drivers/bus/tcpip.o cd_Galil.o 
/home/pkunz/packages/midas/lib/libmidas.a /home/pkunz/packages/midas/lib/mfe.o -lm -lz 
-lutil -lnsl -lpthread -lrt<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
`initialize_equipment()&#39;:<br />
			/home/pkunz/packages/midas/src/mfe.cxx:687: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
`readout_enable(unsigned int)&#39;:<br />
			/home/pkunz/packages/midas/src/mfe.cxx:1236: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:1238: undefined 
reference to `interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function `main&#39;:
<br />
			/home/pkunz/packages/midas/src/mfe.cxx:2791: undefined reference to 
`interrupt_configure(int, int, long)&#39;<br />
			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:2792: undefined 
reference to `interrupt_configure(int, int, long)&#39;<br />
			collect2: error: ld returned 1 exit status<br />
			make: *** [Makefile:36: feMotor] Error 1</div>

			<p>&nbsp;I guess the the aforementioned DAQ frontend compiles because 
its equipment definitions don&#39;t call on the function `initialize_equipment()&#39;, but I 
can&#39;t figure out why it doesn&#39;t work. Help is appreciated. P.K.</p>
			</td>
		</tr>
	</tbody>
</table>

<p>&nbsp;</p>

Thanks for explaining this, Konstantin. 
After updating the function to

INT interrupt_configure(INT cmd, INT source, POINTER_T adr)
{
  return CM_SUCCESS;
}

it compiled without errors. In the original code the "INT source" variable was missing.



> (please use the "plain" text, much easier to answer).
> 
> Hi, Peter, I think you misread the error message. There is no error about initialize_equipment(), the error 
> is about interrupt_configure(). initialize_equipment() is just one of the functions that calls it.
> 
> The cause of the error most likely is a mismatch between the declaration of interrupt_configure() in 
> mfe.h and the definition of this function in your program (in feMotor.c, I guess).
> 
> Sometimes this mismatch is hard to identify just by looking at the code.
> 
> One fool-proof method to debug this is to extract the actual function prototypes from your object files, 
> both the declaration ("U") in mfe.o and the definition ("T") in your program should be identical:
> 
> nm feMotor.o |  grep -i interrupt | c++filt
> 0000000000000f90 T interrupt_configure(int, int, long) <--- should be this
> 
> nm ~/packages/midas/lib/libmfe.a | grep -i interrupt | c++filt
> U interrupt_configure(int, int, long)
> 
> If they are different, you adjust your program until they match. One way to ensure the match is to copy 
> the declaration from mfe.h into your program.
> 
> K.O.
> 
> 
> 
> 
> <p>&nbsp;</p>
> 
> <table align="center" cellspacing="1" style="border:1px solid #486090; width:98%">
> 	<tbody>
> 		<tr>
> 			<td style="background-color:#486090">Peter Kunz wrote:</td>
> 		</tr>
> 		<tr>
> 			<td style="background-color:#FFFFB0">
> 			<p>After upgrading to the lastes MIDAS version I got the DAQ frontend of my application 
> running by changing all compiler directives from cc to g++ and using</p>
> 
> 			<p>#include &quot;mfe.h&quot;</p>
> 
> 			<p>extern HNDLE hDB</p>
> 
> 			<p>&nbsp;extern &quot;C&quot; {&nbsp;<br />
> 			&nbsp;#include &lt;CAENComm.h&gt; &nbsp;<br />
> 			&nbsp;}</p>
> 
> 			<p>With these changes everything seems to work fine.</p>
> 
> 			<p>However, I&#39;m having trouble with a slow control frontend using a tcpip driver. It 
> compiled well with the older MIDAS version. Even though all the functions in question are defined in the 
> frontend code, the following error comes up:</p>
> 
> 			<div style="background:#eee;border:1px solid #ccc;padding:5px 10px;">g++ -o feMotor 
> -DOS_LINUX -Dextname -g -O2 -fPIC -Wall -Wuninitialized &nbsp;-fpermissive -
> I/home/pkunz/packages/midas/include -I. -I/home/pkunz/packages/midas/drivers/bus &nbsp; 
> /home/pkunz/packages/midas/lib/libmidas.a feMotor.o 
> /home/pkunz/packages/midas/drivers/bus/tcpip.o cd_Galil.o 
> /home/pkunz/packages/midas/lib/libmidas.a /home/pkunz/packages/midas/lib/mfe.o -lm -lz -lutil -lnsl -
> lpthread -lrt<br />
> 			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
> `initialize_equipment()&#39;:<br />
> 			/home/pkunz/packages/midas/src/mfe.cxx:687: undefined reference to 
> `interrupt_configure(int, int, long)&#39;<br />
> 			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function 
> `readout_enable(unsigned int)&#39;:<br />
> 			/home/pkunz/packages/midas/src/mfe.cxx:1236: undefined reference to 
> `interrupt_configure(int, int, long)&#39;<br />
> 			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:1238: undefined reference to 
> `interrupt_configure(int, int, long)&#39;<br />
> 			/usr/bin/ld: /home/pkunz/packages/midas/lib/mfe.o: in function `main&#39;:<br />
> 			/home/pkunz/packages/midas/src/mfe.cxx:2791: undefined reference to 
> `interrupt_configure(int, int, long)&#39;<br />
> 			/usr/bin/ld: /home/pkunz/packages/midas/src/mfe.cxx:2792: undefined reference to 
> `interrupt_configure(int, int, long)&#39;<br />
> 			collect2: error: ld returned 1 exit status<br />
> 			make: *** [Makefile:36: feMotor] Error 1</div>
> 
> 			<p>&nbsp;I guess the the aforementioned DAQ frontend compiles because its equipment 
> definitions don&#39;t call on the function `initialize_equipment()&#39;, but I can&#39;t figure out why 
> it doesn&#39;t work. Help is appreciated. P.K.</p>
> 			</td>
> 		</tr>
> 	</tbody>
> </table>
> 
> <p>&nbsp;</p>

We updated midas/examples/experiment/frontend.cxx to correctly contain

/*-- Interrupt configuration ---------------------------------------*/

INT interrupt_configure(INT cmd, INT source, POINTER_T adr)
{
   switch (cmd) {
   case CMD_INTERRUPT_ENABLE:
      break;
   case CMD_INTERRUPT_DISABLE:
      break;
   case CMD_INTERRUPT_ATTACH:
      break;
   case CMD_INTERRUPT_DETACH:
      break;
   }
   return SUCCESS;
}

but if you upgrade from C to C++ from your own old frontend code you might be hit by that issue. 

Maybe Konstantin can update elog:1526 to contain a hint about "INT source".

Stefan

Actually now I see that 

a4) poll_event() and interrupt_configure() have "source" as "int[]" instead of "int" (why did this work before?)

mention this already, but maybe it's not completely clear that one has to change "int[] source" to "int source"

Stefan


> We updated midas/examples/experiment/frontend.cxx to correctly contain
> 
> /*-- Interrupt configuration ---------------------------------------*/
> 
> INT interrupt_configure(INT cmd, INT source, POINTER_T adr)
> {
>    switch (cmd) {
>    case CMD_INTERRUPT_ENABLE:
>       break;
>    case CMD_INTERRUPT_DISABLE:
>       break;
>    case CMD_INTERRUPT_ATTACH:
>       break;
>    case CMD_INTERRUPT_DETACH:
>       break;
>    }
>    return SUCCESS;
> }
> 
> but if you upgrade from C to C++ from your own old frontend code you might be hit by that issue. 
> 
> Maybe Konstantin can update elog:1526 to contain a hint about "INT source".
> 
> Stefan