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Art2 Changes » History » Version 9

Gavin Davies, 02/27/2018 04:31 PM

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{{>toc}}
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In February 2018 we made the long-awaited move to art2 and ROOT6
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Specifically upgrading from art v1_17_01 --> art v2_09_06
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This also brought along upgrade of nutools v1_21_11 --> v2_18_01
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We now pull novaddt/novadaq packages into novasoft instead of using ups products that contain these
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Tensorflow is now available in the offline for deep learning development efforts.
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h1. FHICL changes
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An extensive list of fhicl deprecations is listed on the "art redmine page":https://cdcvs.fnal.gov/redmine/projects/art/wiki under "Deprecations".
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Specific fhicl changes of note in novasoft are the following:
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<pre>
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services.user.myService: {...}           --> services.myService: {...}
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services.Timing: {...}                   --> services.TimeTracker: {...}
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services.SimpleMemoryCheck: {...}        --> services.MemoryTracker: {...}
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services.MemoryTracker.ignoreTotal: ".." --> No longer used
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SelectEvents.SelectEvents: [...]         --> SelectEvents: [...]
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debugModules: "*"  --> debugModules: ["*"] 
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Make a note for cases that use
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services.scheduler.fileMode              --> Contact artists for details
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</pre>
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h1. art header includes
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The code in art2 had a bit of a restructuring. The locations of product-reading libraries and headers have migrated to canvas.
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Full details of the Migration from "ROOT5 to ROOT6":https://cdcvs.fnal.gov/redmine/projects/art/wiki/Migrating_from_ROOT5_to_ROOT6
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h2. Common to novasoft
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Here are a few changes you're most likely to see/need:
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<pre>
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art/Framework/Core/FindOneP.h --> canvas/Persistency/Common/FindOneP.h (FindMany/FindManyP...)
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art/Utilities/InputTag.h      --> canvas/Utilities/InputTag.h
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</pre>
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h1. CAFAna macros
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h2. New Features
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h3. Compilation
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Don't be alarmed by the increase in the number of files produced when compiling CAFAna macros.
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You should see three as opposed to the previous 2 that look like this:
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<pre>
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Compiling test.C produces:
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test_C.d
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test_C.so
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test_C_ACLiC_dict_rdict.pcm
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</pre>
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h3. Compilation errors
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One gets more useful error messaging when running a macro with missing arguments.
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Example:
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<pre>
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Info in <TUnixSystem::ACLiC>: creating shared library /nova/app/users/gsdavies/dev/./DataMCNDLoad_nus17_C.so
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input_line_84:2:2: error: no matching function for call to 'DataMCNDLoad_nus17'
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 DataMCNDLoad_nus17()
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 ^~~~~~~~~~~~~~~~~~
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././DataMCNDLoad_nus17.C:53:6: note: candidate function not viable: requires single argument 'outfile', but no
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      arguments were provided
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void DataMCNDLoad_nus17(std::string outfile)
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</pre>
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h2. Harmless Warnings 
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This section documents new warnings that may pop up, but should not affect the successful completion of your macro.
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h3. TTreeFormula support only 2 level of variables size collections
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If you are seeing warnings similar to:
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<pre>
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Warning in <TTreeFormula::DefinedVariable>: TTreeFormula support only 2 level of variables size collections.  Assuming '@' notation for the collection bpf.
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Warning in <TTreeFormula::DefinedVariable>: Missing class for rec.vtx.elastic[0].fuzzyk.png[0].@bpf.at(1).pdg!
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</pre>
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This is due to accessing more than 2 vectors in your variable (in this example: vertices, prongs, tracks).
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h2. Potential changes
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This section documents changes you may need to make to your macro as a result of switching to root6.
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h3. Fitting errors
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If you are fitting a histogram and getting the error message 
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<pre>Warning in <Fit>: Fit data is empty</pre> 
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but your histogram is not empty, check to see if your bin errors are equal to 0 with <pre>h->Print("all");</pre>
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which will output something like this:
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<pre>
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TH1.Print Name  = cafanauniq86, Entries= 1, Total sum= 102.998
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 fSumw[0]=0, x=-1.10917, error=0
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</pre>
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If they are 0, setting <pre>h->Sumw2(kFALSE);</pre> should solve the problem.