Re: Running FLUKA on multipole cores

Hi Tomek,

If you are using flair, try "Spawn run in many CPUs" control - it's
under Run/Input, third control from the top.
When you run 1 input for multiple cycles, every next cycle has to wait
for the previous one to finish. Therefore, it will only utilize one CPU.
"Spawn" will create multiple input files with different random number
seeds. You can also do this by creating multiple input files with
different WHAT(2) values (such as 1, 2, 3, ...) in RANDOMIZ card and
running each input separately for one or more cycles.
If you use Spawn, flair will allow you to merge the results
automatically. If you create multiple input files manually, you will
have to rename the outputs at the end in such way, that they can then be
merged.

Best regards,
  -George

--
George Kharashvili
Jefferson Lab Radiation Control
1-757-269-6435
Tomasz Cybulski wrote:
> Dear Fluka Users,
> 
>       I am writing to ask about running FLUKA on multiple cores. I have
> just received a new workstation operating two six core processors. I
> have launched the simulations and it appears it is running the
> calculations using just one core. I do not know if it is a matter of
> hardware or FLUKA itself needs to be configured to run on multiple cores.
> 
>       Thank you very much for your help in advance!
> 
> Tomek