Search found 58 matches

by orca.blu
Mon Sep 24, 2012 11:36 am
Forum: Development
Topic: High energy gamma activity
Replies: 2
Views: 1223

High energy gamma activity

At the meeting I forgot to ask something that might be interesting for someone (at least for me). The new method for choosing inventory nuclides http://ttuki.vtt.fi/serpent/viewtopic.php?f=24&t=1812&start=0&sid=d8991c9a168d6e047eb57f26841eb970 seem very useful. Is it possible to add, among the top-N...
by orca.blu
Wed Jul 18, 2012 12:37 pm
Forum: Bugs, problems, questions & feeback
Topic: Memory allocation failed during b-up calculation
Replies: 3
Views: 4329

Re: Memory allocation failed during b-up calculation

With both the suggested corrections (implemented separately),
my simulation runs with no problem up to the second bu step.
Without the corrections, the error occurs after the first predictor step.

thank you

manu
by orca.blu
Mon Jul 16, 2012 7:24 pm
Forum: Bugs, problems, questions & feeback
Topic: Memory allocation failed during b-up calculation
Replies: 3
Views: 4329

Memory allocation failed during b-up calculation

While performing a b-up calculation with version 2.1.7, I got the following error after the first transport cycle: ------------------------------------------------------------ Transport cycle completed in 16.9 seconds. Writing depletion output... ***** Mon Jul 16 16:02:21 2012 (seed = 1342454503, MP...
by orca.blu
Fri Mar 02, 2012 8:35 pm
Forum: Parallelization
Topic: MPI vs OMP
Replies: 6
Views: 3649

Re: MPI vs OMP

I tried a shorter burnup case (5x2 steps) with the latest sss2 version.

MPI_OVERHEAD_TIME seems always quite low.
TIMES.png
times.png
TIMES.png (55.44 KiB) Viewed 3631 times
by orca.blu
Fri Mar 02, 2012 2:25 pm
Forum: Parallelization
Topic: MPI vs OMP
Replies: 6
Views: 3649

Re: MPI vs OMP

ok thank you.

PROCESS_TIME(last idx,1) is always less than 3 min for any case but
[32 MPI * 1 OMP with executable compiled with OMP parallelization ON]
(not presented in the previous post).

In that case, total PROCESS_TIME increases very much (from 2.5 min to 36 min).
by orca.blu
Fri Mar 02, 2012 2:51 am
Forum: Parallelization
Topic: MPI vs OMP
Replies: 6
Views: 3649

Re: MPI vs OMP

I can't access my data now. As far as I remember, I always got PROCESS_TIME in the order of few minutes (X.XXXE+00). (Not sure) Compilation was made with no DEBUG or GD options. In the average cpu_utilization graph (attached), in the calculation 32 mpi * 1 omp, it seems like if all the cpu are conti...
by orca.blu
Thu Mar 01, 2012 9:31 pm
Forum: Parallelization
Topic: MPI vs OMP
Replies: 6
Views: 3649

MPI vs OMP

Some running-time results attached. I am trying quite long burnup calculations with serpent 2. With only 2 burn zones opt 3 seems the best choice. I have 32 core and 60 Gb of memory (i. e., no ram limitation). I tried different combination of OMP and MPI, looking for the best solution. I thought tha...
by orca.blu
Thu Mar 01, 2012 8:31 pm
Forum: Methods
Topic: Delayed Neutron Fraction
Replies: 2
Views: 2354

Re: Delayed Neutron Fraction

by orca.blu
Mon Feb 20, 2012 5:20 pm
Forum: Bugs, problems, questions & feeback
Topic: Heasviest actinide included in the calculation
Replies: 2
Views: 4241

Heasviest actinide included in the calculation

Question: Is the option "set axs" still available? I'm running some burnup calculation. It seems that the option "set axs <Amin> <Amax>" is not working. I get nothing above Am If I add "Cf-252.09c 0.0" to the initial composition, everything seems ok. % --- MSFR-burn repro test ----------------------...