Sixtrack

SIXTRACK is a research project that uses Internet-connected computers to advance Accelerator Physics. Participate by downloading and running a free program on your computer.

SIXTRACK is based at CERN. You can run it under the LHC@home application. Read more about the:

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User profile Profile Francesco Codecasa
Hi, I'm an italian teacher of Maths and Sciences. 43 years old.

News

Quorom of 5, wzero and Pentathlon
I am currently running a set of very important tests to try and
find the cause of a few numerical differences between different platforms
and executables. I could/would not do this usually but because of your efforts
during the Pentathlon I have a unique opportunity. Also keeps up the
workload and gives you all an opportunity to get credits.
These test are wzero with a quorum of 5.Thanks. Eric.
17 May 2015, 14:32:09 UTC · Comment


DISK LIMIT EXCEEDED
Please note that this may occur if you are also subscribed
to the LHC experiment projects ATLAS or CMS using vLHCathome.
A workround is to delete the remaining files yourself.
16 May 2015, 19:03:40 UTC · Comment


New news on the BOINC Pentathlon
Please look at the NEWS 15th May, 2015 for latest update
involving the BOINC Pentathlon. Eric.
15 May 2015, 20:36:56 UTC · Comment


News 15th May, 2015
As many of you know LHC@home has been selected to host
the Sprint event of the BOINC Pentathlon organised by
Seti.Germany. Information can be found at
http://www.seti-germany.de/boinc_pentathlon/22_en_Welcome.html
The event starts at midnight and will last for three days.

This is rather exciting for us and will be a real test of
our BOINC server setup at CERN. Although this is the weekend
following Ascension my colleagues are making a big effort to
submit lots of work, and I am seeing a new record number of active WUs
every time I look. The latest number was over 270,000 and the Sprint
has not yet officially started.

We have done our best to be ready without making any last minute changes
and while this should be fun I must confess to being rather worried
about our infrastructure. We shall see.

We still have our problems, for a year now.

I am having great difficulties building new executables since Windows XP
was deprecated and I am now tring to switch to gfortran on Cygwin.
It would seem to be appropriate to use the free compiler on our
volunteer project.

We are seeing too many null/empty result files. While an empty result can
be valid if the initial conditions for tracking are invalid, I am hoping
to treat these results as invalid. These errors are making it extremely
difficult for me to track down the few real validated but wrong results.
I have seen at least one case where a segment violation occurred, a clear
error, but an empty result was returned. The problem does not seem to
be OS or hardware or case dependent.

I am also working on cleaning the database of ancient WUs. We had not
properly deprecated old versions of executables until very recently.

I am currently using boinctest/sixtracktest to try a SixTrack which will return the full results giving more functionality and also allowing a case to be automatically handled as a series of subcases.

Then we must finally get back MacOS executables, AVX support, etc

Still an enormous amount of production is being carried out successfully
thanks to your support.

I shall say no more until we see how it goes for the next three days. Eric.
15 May 2015, 20:34:20 UTC · Comment


Short stoppage for a disk intervention
The Sixtrack server will be down for a while this afternoon for a disk intervention. Clients will be able to upload results again soon. 30 Apr 2015, 12:27:31 UTC · Comment


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