problem with magma_dgetrf_gpu

Open discussion for MAGMA

problem with magma_dgetrf_gpu

Postby Linuxboy » Thu Dec 01, 2011 2:41 pm

Hi!
I've got some strange results using magma_dgetrf_gpu.

The Answer of using magma_dgetrf_gpu :
Fisrt launch
97911385250306488411244656647118782464.000000000 0.000000000 0.000001000 0.000000000 1.000000000 1.000000000 1.000000000
0.000000000 1.000000000 1.000000000 1.000000000 -0.000001000 -0.000000000 -0.000000000
0.000000000 0.000001000 6.296889782 -0.000001000 1.000000000 1.000000000 1.000000000
0.000000000 0.000000000 0.000000000 -2.117237091 1.000000000 1.000000000 1.000000000
0.000000000 0.000000000 0.000000000 -0.000000000 1.000000000 1.000000238 1.000000000
0.000000000 1.000000000 0.000000000 -0.000000113 0.000001113 -0.000002000 -0.000001000
0.000000000 1.000000000 0.000000000 -0.000000000 0.000001000 0.500000060 -0.000001500

Second launch

-3759158211845854907596800.000000000 0.000000000 0.000001000 0.000000000 1.000000000 1.000000000 1.000000000
-0.000000000 1.000000000 1.000000000 1.000000000 -0.000001000 0.000000000 0.000000000
-0.000000000 0.000001000 6.296889782 -0.000001000 1.000000000 1.000000000 1.000000000
-0.000000000 0.000000000 0.000000000 -2.117237091 1.000000000 1.000000000 1.000000000
-0.000000000 0.000000000 0.000000000 -0.000000000 1.000000000 1.000000238 1.000000000
-0.000000000 1.000000000 0.000000000 -0.000000113 0.000001113 -0.000002000 -0.000001000
-0.000000000 1.000000000 0.000000000 -0.000000000 0.000001000 0.500000060 -0.000001500

I'm using GeForce GT 220, system Ubuntu 11.10 x64.

In what may be a problem?
P,S
Matrix for Lu are ill-conditioned.
Linuxboy
 
Posts: 12
Joined: Tue Nov 29, 2011 9:24 pm

Re: problem with magma_dgetrf_gpu

Postby mgates3 » Fri Jan 06, 2012 4:47 pm

According to http://developer.nvidia.com/cuda-gpus, the GeForce GT 220 is CUDA 1.2, which doesn't support double precision. Double precision was added in CUDA 1.3. Does the single precision magma_sgetrf routine work?

-mark
mgates3
 
Posts: 409
Joined: Fri Jan 06, 2012 2:13 pm


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