MAGMA Forum

Posted: **Tue Sep 23, 2014 12:29 pm**

Hello,

I am working with multigpus system.

In http://icl.cs.utk.edu/magma/news/news.html?id=345 at pdf: http://icl.cs.utk.edu/projectsfiles/mag ... MA_1.4.pdf at the page 24, you expose dsytrd function using it with several gpus.

Why you use it? I put different commands and the results are all simillars that when 1 gpu is used.

Like these:

Code: Select all

testing_dsytrd_gpu -N 15000 --ngpu 3
testing_dsytrd_gpu -N 15000 --ngpu 1

  N     CPU GFlop/s (sec)   GPU GFlop/s (sec)   |A-QHQ'|/N|A|   |I-QQ'|/N
===========================================================================
15000     ---   (  ---  )     14.54 ( 309.62)     ---             ---

Why? Could you explain me where is my mistake?

Thank you!!!

Posted: **Wed Sep 24, 2014 4:28 pm**

Use the multi-GPU interface, magma_dsytrd_mgpu, in testing_dsytrd_mgpu.

magma_dsytrd is a CPU interface to one GPU.
magma_dsytrd_gpu is a GPU interface to one GPU.

-mark

Posted: **Fri Sep 26, 2014 7:20 am**

Ok, thank you very much.

Some error in my compilation occurs and I haven't got the executable file.

I will recompile it.

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