Dear Marlon Saveri Silva,
From my experiences, i see that when i run heavy program on a virtual machine, the performance of CPU is slow down (RAM does not play a big role there- your 11 GB is already big). Have you ever try to install Linux on your machine and run FLUKA directly within this ?
From your e-mail, i suppose that you run FLUKA on parallel on difference cores of your machine. If you want to run FLUKA on supercomputer, remind that you will have to run FLUKA on difference cores of difference CPU of supercomputer. The task will be more complicated. I never tried it before.
The computational time depend in fact on each simulation, so you have to estimate it for each job. It's difficult to choose one computational parameter for all job.
Best regards.
Ngoc Duy TRINH, GANIL, France
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De : owner-fluka-discuss_at_mi.infn.it [owner-fluka-discuss_at_mi.infn.it] de la part de Marlon Saveri Silva [marlon.saveri_at_lnls.br]
Envoyé : jeudi 25 février 2016 20:30
À : fluka-discuss_at_fluka.org
Objet : [fluka-discuss]: Estimating hardware configurations for bremsstrahlung simulations
Dear Fluka experts,
I’m working with some bremsstrahlung simulations for synchrotron beamlines in order to check dose absorbed by some components and equivalent dose in some regions. I’m already applying 1atm inside electrons pipe and using that recommended biasing techniques (from ADONE example) to make faster simulation. Ergo, In order to get USRBIN statistic better than 20%, I need at least 1E8 primaries. Using 11GB RAM and 7 Intel Xeon 3.2GHz processors in a Ubuntu Virtual Machine mounted at Windows 7 64bits, 4 cycles and 6 SPAWNS, it spends more than 8 days, generating more than 6Gb of files.
I believe some of you have already done such kind of study and could enlighten me about the best hardware configuration for such case; for example, what do we need for the purpose of running that simulation, with 5E8 primaries, in 1 day.
Since there’re lots of cases to simulate (and some requires more than 1E8 primaries), I intend to rent space in a supercomputer from another institution. In order to accomplish this, I need to fill a form telling them the computational parameters I need (number of cores, processors, hd space, parallelism technique, ram memory…) and the number of hours of simulation.
Regards,
Marlon Saveri Silva
Mechanical Engineer
Beamlines Instrumentation and Support Group – SIL
Brazilian Synchrotron Light Laboratory– LNLS – CNPEM
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Received on Fri Feb 26 2016 - 09:35:38 CET