Search found 21 matches

by Klausb
Tue Oct 10, 2017 4:20 pm
Forum: User discussion
Topic: How to retrieve final_res and numiter?
Replies: 4
Views: 1071

How to retrieve final_res and numiter?

Hello,

I need the final residual value and number of iterations needed at the end of the solver run.

I read that "final_res" and "numiter" are the related variables or functions, I assume from a monitoring class.

How can I retrieve these values?

Klaus
by Klausb
Tue Oct 10, 2017 12:12 pm
Forum: User discussion
Topic: Where can I find the linear solver documentation?
Replies: 4
Views: 1811

Next steps

Dear Hartwig, originally I worked with the following solvers which, in combination, were really fast to solve my physics problem but only 2D on the CPU, now I have to move to 3D with GPU support I think because the 3D case will have about 30.000.000 cells: For symmetric matrices: PCG + IC preconditi...
by Klausb
Mon Oct 09, 2017 3:07 pm
Forum: User discussion
Topic: compiled magma library has no functionality
Replies: 0
Views: 788

compiled magma library has no functionality

Hello, after many issues with a MKL based installation on Ubuntu 16.04, I tried to install magma with openblas support based on the make.inc example for openblas. Findings: 1: make shared Compilation takes place 2: make test Something happens but as there's no "feedback" concerning a result or succe...
by Klausb
Sun Oct 08, 2017 4:12 pm
Forum: User discussion
Topic: Where can I find the linear solver documentation?
Replies: 4
Views: 1811

Where can I find the linear solver documentation?

Hello,

I am looking for a documentation describes the setup of the MAGMA linear solvers BiCG, BiCGSTAB, CG, IDR ... and the parameters for their configuration in my application code. I assume I am overlooking something but I couldn't find it.

Klaus
by Klausb
Sun Oct 08, 2017 9:22 am
Forum: User discussion
Topic: MKL shared libraries not "found" in the accepted lication
Replies: 1
Views: 1134

MKL shared libraries not "found" in the accepted lication

Hello, even so the shared and static libraries are not properly installed (see previous thread), I identified another issue of the shared library when I tried to make the examples. Apparently, the path to the Intel MKL is wrong. The magma shared library looks for the Intel MKL shared libraries in /u...
by Klausb
Sun Oct 08, 2017 6:36 am
Forum: User discussion
Topic: make install issues
Replies: 1
Views: 828

make install issues

Hello, I tried to install the shared and static library one after another and applied accidently 'sudo make install prefix=/usr/local/magma' a second time' applying "sudo" a second time causes an error and the installation fails. The problem is, the error stays, I can't repeat the installation. erro...
by Klausb
Sun Oct 08, 2017 6:22 am
Forum: User discussion
Topic: Installation fails: /usr/bin/ld: cannot find -lgfortran
Replies: 1
Views: 2348

Solved: Installation fails: /usr/bin/ld: cannot find -lgfort

just for the record, the problem was caused by a mismatch of gcc/g++ <> gfortran compiler versions, updating gfortran is the fix
by Klausb
Sat Oct 07, 2017 5:31 pm
Forum: User discussion
Topic: Installation fails: /usr/bin/ld: cannot find -lgfortran
Replies: 1
Views: 2348

Installation fails: /usr/bin/ld: cannot find -lgfortran

Hello, I have been trying to install magma on Ubuntu 16.04 with cuda-9.0, gcc/g++ 6.3 and gfortran The problem is, the installation fails due to: /usr/bin/ld: cannot find -lgfortran -lgfortran usually refers to the shared library libgfortran.so which is not in /usr/bin, there's the gfortran binary l...
by Klausb
Thu Oct 05, 2017 5:15 pm
Forum: User discussion
Topic: Efficient computation (solve) of Ax = b when A is symmetric
Replies: 3
Views: 891

Re: Efficient computation (solve) of Ax = b when A is symme

Dear Hartwig,

based on your insights, I assume it's only a wrapper that hides an efficient copy process (lower<>upper) so I'll try the same - we'll see whether there's a benefit.

Klaus
by Klausb
Thu Oct 05, 2017 5:07 pm
Forum: User discussion
Topic: Efficient computation (solve) of Ax = b when A is symmetric
Replies: 3
Views: 891

Re: Efficient computation (solve) of Ax = b when A is symme

Dear Hartwig, based on your insights, I assume it's only a wrapper that hides an efficient copy process (lower<>upper) so I'll try the same - we'll whether there's a benefit. Do you know how to apply (syntax) of magmablas_dsymmetrize()? void magmablas_dsymmetrize ( magma_uplo_t uplo, magma_int_t m, ...