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Introduction to Unified Parallel C (UPC) and Co-array Fortran (CAF)

Large seminar room, HLRS (Höchstleistungsrechenzentrum Stuttgart), Universität Stuttgart, Allmandring 30, D-70569 Stuttgart


2014, Monday Apr. 14, 8:30 and Tuesday Apr. 15, 15:30


Partitioned Global Address Space (PGAS) is a new model for parallel programming. Unified Parallel C (UPC) and Co-array Fortran (CAF) are PGAS extensions to C and Fortran. UPC and CAF are language extensions to C and Fortran. Parallelism is part of the language. PGAS languages allow any processor to directly address memory/data on any other processors. Parallelism can be expressed more easily compared to library based approaches as MPI. This course gives an introduction to this novel approach of expressing parallelism. Hands-on sessions (in UPC and/or CAF) will allow users to immediately test and understand the basic constructs of PGAS languages. This course provides scientific training in Computational Science, and in addition, the scientific exchange of the participants among themselves.


First day:
08:30 Registration
09:00-13:00 Lectures and exercises
14:00-17:00 Lectures and exercises
Second day:
09:00-13:00 Lectures and exercises
14:00-15:30 Lectures and exercises




Academic participants (i.e., members of universities or public research institutions) from Europe or PRACE countries: Please apply through the PATC web page. After your registration, you will receive an automated "congratulation"-email about your successful registration. This email implies that you have a guaranteed seat in the course and you should organize your travel.
All other participants (not from academia, or from outside Europe), please apply through this online registration form.
Course number is 2014-UPC1.


for registration is Apr. 6, 2014 (extended deadline).


Members of German universities and public research institutes: none.
Members of universities and public research institutes within Europe or PRACE: none.
Members of other universities and public research institutes: 120 EUR.
Others: 400 EUR.
(includes food and drink at coffee breaks, will be collected on the first day of the course, cash only)


Programming experience in Fortran or C, some knowledge about parallel programming


HLRS is part of the Gauss Centre for Supercomputing (GCS), which is one of the six PRACE Advanced Training Centres (PATCs) that started in Feb. 2012. The mandate for the PATCs is as follows: "The PRACE Advanced Training Centres will serve as European hubs of advanced, world-class training for researchers working in the computational sciences." (see D3.2.3)
This course is a PATC course, see also the PRACE Training Portal and Events. For participants from public research institutions in PRACE countries, the course fee is sponsored through the PRACE PATC program.

HLRS is also member of the Baden-Württemberg initiative bwHPC-C5.
This course is also provided within the framework of the bwHPC-C5 user Support.


Additional information can be found, e.g., at PGAS (wiki), CAF (wiki), UPC (wiki), UPC Community website, UPC at Berkley

Travel-Info Stuttgart

See HLRS address and travel-info. The next public transport stations are: "Universität, Stuttgart" (S-Bahn station, 15 min on foot) and "Lauchhau, Stuttgart" (Bus station, 4 min on foot to HLRS, bus lines 84, 92, 746, 747, 748, but not 82! from S-Bahn station "Universität, Stuttgart" and bus line 81 from S-Bahn station "Stuttgart-Vaihingen").
Accomodation: see HLRS accomodation-info. Private Bed&Breakfast is also available (might be cheaper than the hotels), e.g., A DJH youth hostel is also available.
Further links: Online-Stadtplan des Stadtmessungsamtes Stuttgart or

Local Organizer

Rolf Rabenseifner phone 0711 685 65530,
Joerg Hertzer
phone 0711 685 65932, hertzer[at]

Cancelation Policy

If you cannot come to the course, please send an email to the organizer as soon as possible. This would allow us to accept additional participants from the waiting-list. There is no cancelation fee.
NO-SHOW: Registered persons that do not cancel and do not show up without any reasons are blocked for the next year on any of our workshops (because it is too expensive to produce unused copies of the slides for them).


Each participant will get a paper copy of all slides.

Shortcut-URL of this course:


Rolf Rabenseifner phone 0711 685 65530, rabenseifner[at]
Joerg Hertzer phone 0711 685 65932, hertzer[at]