memory of MKL routines

[Cheng_Xinghua]

 1 Does the pdposv routine, which solves a symmetric positive definite system of linear equations, allocate any other large memory except the matrix A and B?

2  To solves a symmetric positive definite system of linear equations, which routine needed addtional memory  is   the least ?  and how many about?

[SergeyKostrov]

>>...1 Does the pdposv routine, which solves a symmetric positive definite system of linear equations, allocate any other large memory >>except the matrix A and B?.. Simple tests could be done and, depending on a platform, some built-in functionality of an operating system could show you the difference. For example, use Task Manager on a Windows platform for verification how much memory is allocated: Test-case 1: Allocate memory for A and B matricies ( for example, 8192x8192 ) -> don't call pdposv -> verify amount of allocated memory ( M1 ) Test-case 2: Allocate memory for A and B matricies ( for example, 8192x8192 ) -> call pdposv -> verify amount of allocated memory ( M2 ) Calculate the difference M2 - M1.

[Cheng_Xinghua]

It's a good idea.

[SergeyKostrov]

>>>>...Calculate the difference M2 - M1... >> >>It's a good idea... Please follow up with results of your tests. Thanks in advance!