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Hello,
i'm using Pardiso to solve a real unsymmetrical problem with very large matrix
( n=40 000 ), 3% non-zeros (45 986 096) and 1 rhs.
I'm quite disappointed about the times of calculation : on my computer (8 CPUs, 16432032 KB total memory, 1595 MHz), it takes 35 min. Does it seem normal to you?
I haven't found any comparison of performance related to the size of the matrix...
Maybe my iparms are not optimized for my problem :
iparm[0] = 1; /* No solver default */
iparm[1] = 2; /* Fill-in reordering from METIS */
iparm[2] = 8;
iparm[3] = 31; /* CGS */
iparm[4] = 0; /* No user fill-in reducing permutation */
iparm[5] = 0; /* Write solution into x */
iparm[6] = 0; /* Not in use */
iparm[7] = 0; /* Max numbers of iterative refinement steps */
iparm[8] = 0; /* Not in use */
iparm[9] = 13; /* Perturb the pivot elements with 1E-13 */
iparm[10] = 1; /* Use nonsymmetric permutation and scaling MPS */
iparm[11] = 0; /* Not in use */
iparm[12] = 0; /* Not in use */
iparm[13] = 0; /* Output: Number of perturbed pivots */
iparm[14] = 0; /* Not in use */
iparm[15] = 0; /* Not in use */
iparm[16] = 0; /* Not in use */
iparm[17] = -1; /* Output: Number of nonzeros in the factor LU */
iparm[18] = -1; /* Output: Mflops for LU factorization */
iparm[19] = 0; /* Output: Numbers of CG Iterations */
iparm[31] = 1; /* iterative solver*/
iparm[60] = 2; /* Out-of-Core resolution */
Thanks for any help you can give me
Yannick
p.s : I don't know where to find the version of pardiso ( is not in mkl_pardiso.h)
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