code_saturne User's Forum

Hello, I am using version 4.0.6 and want to set the solver to PCG(polynomial preconditionning). Although I set the "Equation parameters" Conjugate gradient via GUI, I still found the multigrid as a solver for pressure. Is this a correct set? I find the "cs_user_parameters-linear_solve...

Hello, There seems to be something wrong outside my code as I edit the default C compiler flags(CFLAGS) to "-ta=tesla", and the feedback is accelerate the part of code as follow. _mat_vec_p_l_csr: 2239, Generating copyin(mc->val[:ms->n_rows+1],ms->row_index[:ms->n_rows+1],ms->col_id[:ms->r...

Hello, Thanks a lot. That's a mistake. But when I fix the error, I still get the same problem. but If set the MSR format for the CS_MATRIX_BLOCK_D fill type. It shows that "_mat_vec_p_l_native" is the main call for CG, and _b_mat_vec_p_l_msr is the main call for block_3_jacobi. Best Regard...

Hello, If I set the file(src/user_examples/cs_user_performance_tuning.c.) you mentioned, most linear systems should use CSR. But recently I find that most linear systems still use NATIVE when I use callgrind tool for the call graph. It shows that "_mat_vec_p_l_native" is the main call for ...

Hello,

The example in the file(src/user_examples/cs_user_performance_tuning.c.) you mentioned helps me to force CSR for scalar matrices but not for the velocity(version 4.0). But if I want to set MSR for the velocity and CSR for most scalar matrices, what should I do?

Best Regards,

Jackie

Hello, Thanks a lot. As you immentioned before, I am using version 4.2 or above and want to set the solver to PCG+jacobi preconditionner. Could you tell me how to set file? Secondly, I don't know how to add the same setting for symmetric scalar matrice, Could you upload an attachment for example? Be...

Hi，

Thanks a lot!
I've already edited config/cs_auto_flags.sh to edit the default PGI compiler flags, including "added to $CFLAGS for profiling". So I want to get the information about PGI Compiler Feedback after compiling "the Code".

best regards,

Jackie

Thank you Yvan for the question.

If I want to get the PGI Compiler Feedback, which file and location should I look for?

best

Jackie

Thank you Yvan for the question.

I replace the lines and put this file in attachment. I want to know the revise to see if it corrects.
If wrong, could you revise this file and reload?

best

Jackie

Hello, I've already read a paper named "Accelerating the Conjugate Gradient Algorithm with GPU in CFD Simulations", which mentioned CUBlas library, CUsparse library, MAGMA library and ViennaCL library. I don't know how to use these libraries in Code Saturne. And are these libraries used in...