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Gianluca_G_
Beginner
56 Views

LAPACKE_zgesv Array Limitations

 

I'm using LAPACKE_zgesv (MKL 11.3.01) in c# with arrays of Complex.
I have problems when the arrays exceeded about 12000x12000 elements (2.145GB)

.NET Have limitations but I overcomed it with <gcAllowVeryLargeObjects enabled="true" /> directive.

By the way it seems that the problem is with this function LAPACKE_zgesv().
this is the message: "The array size exceed the adresses limits"

Is there any array size limitation?


Thank you very much

Gianluca

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3 Replies
Gennady_F_Intel
Moderator
56 Views

There is not such limitation. That's the problem with .NET. You may check how it works with the C example. 

Gianluca_G_
Beginner
56 Views

 ok, thankyou I will check further

Gianluca_G_
Beginner
56 Views

 

Dear Gennady, 

the problem seems to be with LAPACKE_zgesv() or at least something linked with it.

I have a Matrix Complex[12145,12145] and a vector of Complex[12145 ] if I apply the LU decomposition (implemented by us) to resolve that system it works. It takes a lot of time but it works.

If we pass these parameters to LAPACKE_zgesv function it doesn't work. Maybe it depends of C# declaration, but with smaller System it works.

I'm using a notebook with windows 10 and 10GB of RAM memory.

I attach the simple example I used to test it.

If you want I have also the files with data but are very large (http://we.tl/ypYNEAk2ZU).

Thank you for any help you can give


Gianluca