HepEvt common block size requested to be 10000 by ATLAS

[Frank Siegert]

Since ATLAS wants to use TAUOLA and PHOTOS on top of Sherpa, the sizes of the HEPEVT common blocks of these have to match ours (which is 4000 right now).

[Frank Siegert]

One possible solution: Disable compilation of Lund and the Lund_Interface, such that we don't initialize a HEPEVT common block at all. Of course this means that fragmentation and decays can't be done through Lund anymore.

Implemented as r11024 on trunk.

[anonymous]

to use TAUOLA and PHOTOS ​on top of Sherpa, the sizes ​of the HEPEVT common blocks of these have to match ours

[Frank Siegert]

Fixed on trunk (r11084). Will be in bug-fix release 1.1.3.

[ozenin@cern.ch]

One remark on the default HEPEVT size setting:

E.g., CMS is known to still use HEPEVT size = 4000.

Can `--enable-hepevt=<hepevt_size>' option be provided for configure script, just like this is implemented in the attached patch?

Thank you.

[anonymous]

Креативные картинки

[Frank Siegert]

Hi Oleg,

thanks for your suggestion. I don't quite understand your patch: You can't do an #include "config.h" in a Fortran file, can you? And what purpose does the renaming of pythia6214.f to pythia6214.F have?

Frank

[ozenin@cern.ch]

Hi Frank,

Preprocessor directives like #include are correctly processed by g77 and gfortran compilers which use the `cpp' preprocessor for this purpose. The .F' extension indicates that the fortran source must be processed by cpp' before being passed to the fortran compiler. On the other hand, `.f' files are not preprocessed unless the compiler is invoked with `-x f77-cpp-input'. Thus, renaming pythia6214.f to pythia6214.F may be the easiest way to run the preprocessor first.

WBR, Oleg.

[Frank Siegert]

Thanks for the explanation. I have prepared a patch which avoids having to run cpp on the fortran files, but does the replacement already during configure.

I am attaching it here, and you can apply it with patch -p0 < hepevt-size.patch. I had to leave the default at 10000 (because that's what we just communicated to our users as the new default), but that shouldn't be a problem for you, right?

Please give me feedback whether everything works as expected.

Thanks, Frank

[Frank Siegert]

Sorry, that patch was too big to upload (because of moving all of pythia code around). I uploaded it to ​http://www.ippp.dur.ac.uk/~fsiegert/hepevt-size.patch

Frank

[Stefan Hoeche]

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