Quoting - sunil.satheansys.com

I get the following error message when I try to solve a tridiagonal system.

UNSUCCESSFUL RUN FOR SPIKE - INFO EXIT -1
SPIKE_CORE ERROR CODE -314

I am using pspike.tp = 1 and mat.format='S'

What could be going wrong?

Sunil.

Hello, The current version of the solveronly supports automatic partitioning of sparse matrices (pspike%tp=0). Manual partitioning (pspike%tp=1) is notyet available. If you're using mat%format='S', the MPI master process initially holds the entire matrix. The matrix is automatically distributed to the other MPI processes upon calling the SPIKE subroutine. Section 6.5of the user guide shows an example of automatic partitioning using the CSR format. Please let us know if you have any other questions. Best regards, Henry Gabb Intel Cluster Software and Technologies

What storage format are you using for your matrix? If it's banded storage format, you shouldset mat%format='D'. Then you will be able to use spike%tp=1.

Hello Sunil,

I was wrong. The current release already supports manual partitioning with the CSR format. According to Table 7.4 of the user guide, error code -314 indicates that mat%kl or mat%ku is not set correctly. Please verify that these variables are being set correctly for all MPI ranks. Please let me know if that doesn't solve the problem.

Best regards,

Henry

Hello Sunil,

You're right.We'll take a look at the code to see why this error check is happening for CSR format. It will hopefully be a simple fix so it shouldn't take too long to post a new library.

It would also help ifyou could provide a test case that reproduces the problem. We can run it against our latest internal code.

Best regards,

Henry

Hi Sunil, I don't see the files that you uploaded in your last post. Do you see them when you login to the support forum? I'll double-check example 6 to see if I can reproduce a failure. Do you get an error code with this example? Thanks, Henry

Thanks Sunil, I'll run thetest program and let you know what I find. Henry

Hello Sunil, The regression that caused example6 to fail has been fixed but I'm still getting error code -314 for your test program. We're looking into why this error check is even performed. When the problem is fixed, we'll post an updated package to http://whatif.intel.com. I believe you know Professor Ahmed Sameh (Purdue University), one of our university collaborators on this project. He interested in how you are using Spike. If you send me your e-mail address, I will forward it to Ahmed. My e-mail address is henry.gabb@intel.com. Best regards, Henry

Hello Sunil, The latest release of the solver fixes the problem that you reported. A few error checks were being performed that didn't make sense for sparse format matrices. It was easy to fix. You can get the latest package from the Intel Adaptive Spike-Based Solver link on http://whatif.intel.com. Thanks for reporting the problem. Henry