In-place extra precision ZGESV solution ?

[mocsaitamas]

Hi,

Generally I use ZGESV to solve complex linear algebraic equations, which are ill-conditioned however. So I need extra precision to get precise solution. For this I started to use the new ZGESVXX routine, which uses the iterative refinement based on extended precision arithmetics. This of course not an in-place solver anymore, as both the LU factorized system matrix and the original system matrix are kept in the memory. Because of this I am running out of memory. Could anybody give me a hint how to overcome this, except hardware upgrade ?
Thx

[Julien Langou]

Unfortunately, this is an intrinsic limitation of all iterative refinement methods.
You need the original problem (to refine) and the factorization (to solve).
Best wishes,
Julien.

[mocsaitamas]

Are there extra precision in place solvers currently available ? What is the current status of XBLAS for example ?