OpenMathLib / OpenMathLib/OpenBLAS
Crash with Open Blas using cblas_dgemm with square matrix of size 100 on widows 10 Visual Studio 2017
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Description
Hi all,
I have small test case where I call "cblas_dgemm()" using OpenBLAS and when I use a matrix of size N x N with N >= 70, I have a crash!
I can compile and run the code for N <= 60 but it does not work anymore with N > 70. Here is my environment;
- Windows 10 Professional 64 bits
- Visual Studio 2017 (Test with Release x64)
- OpenBLAS-0.2.20
- Processor: Intel Core i7-5930K Haswell E-EP with 16GB of RAM
The test code is attached in test_cblas_dgemm.zip. I use the one in the tutorial of Intel
https://software.intel.com/en-us/mkl-tutorial-c-multiplying-matrices-using-dgemm
but using OpenBLAS instead of Intel(R) MKL.
Where did I make wrong or any ideas of the issue ?
Thanks !
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Research direction
Start by building and running the attached test_cblas_dgemm.zip with OpenBLAS-0.2.20 on Windows 10, Visual Studio 2017, and x64 Release settings. Exercise cblas_dgemm with the reported matrix sizes around N=70 and inspect the Windows/OpenBLAS path for the crash. Done means the failure is reproduced and its cause is identified, with a verified correction or documented usage issue.
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Assessment
- Tech stack
- c
- Domain
- backend, performance
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 30/100