LHC@home

Has anybody noticed the performance difference between windows and linux on some workunits?

For example on this one:

http://lhcathomeclassic.cern.ch/sixtrack/show_host_detail.php?hostid=10359398

The windows client takes almost 20 times longer to complete this work unit compared to the Linux client.

Any clue on what reason for this could be?

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You didn't identify a work unit so I can only guess.

Lately I've noticed that Windows takes much longer to process work units. Looking it to it I discovered that these work units are spending much CPU time dealing with an invisible console window. I suspect that the windows sixtrack contains active debugging code that is writing a lot of information to this console window.

In any case, running 4 tasks on a 4 core system I'm seeing only about 25 % of the CPU time going to computation. The rest is spend mucking around with console windows.