code_saturne User's Forum

Thank you dear Yvan,

A linux expert guy solved it for me!

Regards,
Mohammad

Hello, Thank you very much dear Yvan, I found mpi on the cluster. But now I get this error in compile.log file when I run a job: /state/partition1/intel/impi/5.0.1.035/intel64/bin/mpiicc: line 590: icc: command not found /state/partition1/intel/impi/5.0.1.035/intel64/bin/mpiicc -DHAVE_CONFIG_H -I/sh...

Hello, I noticed that MPI is not installed on the cluster and it seems that it does not apply the partitioning on the mesh! I don't see any messages about partitioning in the listing file on the cluster, while on my own PC I see the following messages on all runs: No "partition_input/domain_num...

Hello, Thanks for your reply. I tested the case on another PC (with ver. 6.0.4 installed) with my checkpoint files, there is no problem on that PC, too! The problem just occurs on the cluster and only on version 6. [For your information, I start the calculations with a previous simulation checkpoint...

Hello, The problem happened again, I noticed it only happens if I use Neumann B.C for the pressure at the outlet boundary. icodcl(ifac,ipr) = 3 !Neumann Boundary Condition for the Pressure rcodcl(ifac,ipr,1) = 0.d0 rcodcl(ifac,ipr,2) = rinfin rcodcl(ifac,ipr,3) = 0.d0 When I add these codes to the o...

Hello, Thank you very much Yvan, I got it! But you said that: number of cores=number of MPI processes * number of OpenMP threads . When I run code_saturne in parallel I use this command: code_saturne run -n X The question is what is X exactly? The number of MPI processes or physical cores? If it is ...

Hello, Thank you again dear Yvan. I don't know the network type of cluster, but It seems to be an old-fashioned cluster! As I said, the best number of threads for any number of MPI Processes was 16 (Any number greater or smaller than this slows down the code) and at least I need 16 MPI Processes whi...

Hello, Thank you for the reply. Unfortunately the cluster does not allow me to use more than 1 node, but for the first two cases that you mentioned the results are as following: 48 MPI processes, 1 thread* -> 120 seconds for each iteration in average 24 MPI processes, 2 threads* -> 84 seconds for ea...

Hello, Thanks a lot dear Yvan, I'm not very familiar with MPI and OMP. I'm on a cluster with AMD Opteron(tm) Processor 6386 SE and 128GB of RAM and a maximum number of 64 cores . But the calculation speed is too slow which takes about 60 seconds for each iteration for LES. I have 3 million cells and...

Hello, I'm doing LES on a mesh which contains 3.2M cells. I use 48 threads for this simulation. I'm using METIS. When I start the simulation these messages are showing up in listing file: Numbering for interior faces: type: threads number of threads: 48 number of exclusive groups: 35 number of eleme...