https://wiki.physik.uzh.ch/lhcb/ 2026-05-30T02:06:41+00:00 https://wiki.physik.uzh.ch/lhcb/ https://wiki.physik.uzh.ch/lhcb/_media/wiki:dokuwiki.svg text/html 2011-08-23T12:44:50+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:addchrono?rev=1314103490&do=diff Add Chronometry Problem While at the end of Brunel or DaVinci, the execution time of each individual algorithm is displayed in the TimingAuditor, this is not true for tools. To monitor the time for tools (it also works for algorithms), the follwing has to be implemented. text/html 2010-05-12T16:32:37+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:browsing-dst?rev=1273681957&do=diff Browsing a DST-File If you want to inspect the contents of a DST-File GaudiPython might be helpful. To use the following instructions you need to set up Panoramix and then start python > SetupPanoramix > python In Python you can then use the following commands to inspect the first track of the first event. text/html 2009-01-28T14:27:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:declareproperty?rev=1233152878&do=diff declareProperty Idea In your python options file, you may want to pass values to a certain used C++ class (e.g. in DaVinci in the TupleToolMCTruth you may want to switch on the association by Chi2 or not). Example The following example treats the case, if you want to pass a string to your C++ class (to save output, for instance). text/html 2011-09-06T13:56:55+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:gaudi?rev=1315317415&do=diff Gaudi Job-Configuration * OutputLevel - What where these numbers again? * declareProperty - How to pass a value in the python-options to a C++ class. * Import classes in options in a namespace - How to import classes which reside in a certain namespace in your options file * Add the possibility for a nTuple - How to make your class ready for using an nTuple text/html 2010-04-16T13:07:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:importnamespace?rev=1271423234&do=diff Import Classes in Namespace How to In your options file, you normally do: from Configurables import myClass However, if myClass is in a certain namespace, let's say myNamespace::myClass, then you have to do: from Configurables import myNamespace__myClass text/html 2010-06-08T11:47:03+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:messagesvc?rev=1275997623&do=diff How to format the output of a Gaudi job Code To format the output, you need to include something like: MessageSvc().Format = "% F%60W%S%7W%R%T %0W%M" which will display different types of output with a different length. The details can be found at: text/html 2011-09-14T07:35:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:modifyparticletable?rev=1315985752&do=diff Modifying the properties of particles in ParticleTable.txt Idea You can modify the properties of particles, which are stored in the DDDB under param/ParticleTable.txt. This can be useful e.g. in Gauss. How (not) to This example is for Gauss v40r2p3 and does not fully seem to work. In Gauss-Job.py (or similar) write: text/html 2011-01-12T13:58:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:newversion?rev=1294840707&do=diff How to add a new version of a Gaudi software Prerequisites If you work locally, you first have to execute the lines described here (up to install CMT environment). Install new Version (The following examples will all be for DaVinci) Type setenvDaVinci vXrYpZ text/html 2009-11-30T09:01:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:ntuple?rev=1259571672&do=diff How to make your GaudiAlgorithm / GaudiTool ready for an nTuple Problem Unlike a DaVinci-Algorithm (DVAlgorithm), Gaudi algorithms (most of the time) inherit from GaudiAlgorithm and tools from GaudiTools where the possiblity to create an nTuple (in an easy way) is not implemented. text/html 2010-03-19T09:05:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:outputlevel?rev=1268989549&do=diff Output Levels Idea In the Gaudi-framework, there exist several layers of print-statements. According to the level which is set (f. ex. in an options-file), any message with this level or higher will be printed. Normal Output Levels * DEBUG (2) text/html 2010-09-03T07:11:49+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:puttingontes?rev=1283497909&do=diff How to put a container on the TES Idea Sometimes it might be useful to make a copy of an existing container (with Particles, Tracks,...) and put it on the TES, to be used for a later algorithm. Code (C++) This can be done the following: LHCb::Tracks* tracks = new LHCb::Tracks(); // Create the new container for(loopOverOldContainer){ tracks->insert( trackToCopy ); } put( tracks, "MyOutputLocation" ); text/html 2009-10-31T10:03:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:removealgorithm?rev=1256983434&do=diff How to remove an Algorithm in an Options file Problem Suppose you want to remove an algorithm, for example the instance 'FitDownstream', which is a TrackEventFitter, in the sequence 'TrackDownstreamFitSeq'. For this, you write in your options file: text/html 2009-12-08T08:47:22+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:removepackage?rev=1260262042&do=diff How to savely remove a package Mind the following Be careful in which order you clean things. With the old setup it didn't matter. If you want to remove a package don't do rm -r Hat/Pack cd $DAVINCIROOT/cmt ; cmt br make clean This will not remove the package library from the InstallArea. Only the package knows how to clean its libraries. So do: text/html 2009-12-08T08:49:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:troubleshooting?rev=1260262164&do=diff text/html 2009-12-07T08:49:19+00:00 Anonymous (anonymous@undisclosed.example.com) https://wiki.physik.uzh.ch/lhcb/gaudi:undefinedreference?rev=1260175759&do=diff 'Undefined Reference' while linking Problem Even if compiling an algorithm / tool may work without error, the linker may complain about 'undefined reference to `LHCb::aClass::aMethod(some parameters)'. Solution This error message occurs, if the .h-file is found, but the libraries in the path do not contain the binaries for the class. There are two possible reasons: