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OpenBLAS is an open source BLAS library based on GotoBLAS2 1.13 BSD version. This mailing list is for general discussion related to the use of OpenBLAS.

Please file bugs at https://github.com/OpenMathLib/OpenBLAS/issues . The wiki pages are https://github.com/OpenMathLib/OpenBLAS/wiki .

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Prometheus47, … martin-frbg3

3/31/20

Openblas dgemm slower than for loops implementation for matrix multiplication.

Cannot really answer without knowing OpenBLAS version and typical problem size. (If the matrix is

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Openblas dgemm slower than for loops implementation for matrix multiplication.

Cannot really answer without knowing OpenBLAS version and typical problem size. (If the matrix is

3/31/20

11/14/17

Does OpenBLAS on Android platform support lapack?

I build OpenBLAS for Android armv7 using official method. And when I build my code, the error is

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Does OpenBLAS on Android platform support lapack?

I build OpenBLAS for Android armv7 using official method. And when I build my code, the error is

11/14/17

贾迅, Zhang Xianyi2

6/12/17

About the default rounding mode

Hi, We didn't control rounding mode. It is by default. Which CPU do you test? Xianyi 2017-06-11

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About the default rounding mode

Hi, We didn't control rounding mode. It is by default. Which CPU do you test? Xianyi 2017-06-11

6/12/17

Trokon Johnson, Zhang Xianyi3

9/16/16

OpenBLAS multithreading implementation vs OpenMP

Intel(R) Core(TM) i3-4160. Although, I do plan to test these on several ARM-A53 embedded boards once

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OpenBLAS multithreading implementation vs OpenMP

Intel(R) Core(TM) i3-4160. Although, I do plan to test these on several ARM-A53 embedded boards once

9/16/16

mintaka, Zhang Xianyi5

2/15/16

About multiplying a matrix with a vector: Why cblas_?gemm is faster than cblas_?gemv ?

Hi Xianyi, thanks for confirming that. Any plan to fix it in the near future? On Monday, February 15,

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About multiplying a matrix with a vector: Why cblas_?gemm is faster than cblas_?gemv ?

Hi Xianyi, thanks for confirming that. Any plan to fix it in the near future? On Monday, February 15,

2/15/16

12/30/15

Remarkable variations in execution times for same matrix sizes for DGEMM on Intel Haswell i5-4590

Dear All, I am observing lot of variation in execution times of OpenBLAS DGEMM on Intel Haswell,

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Remarkable variations in execution times for same matrix sizes for DGEMM on Intel Haswell i5-4590

Dear All, I am observing lot of variation in execution times of OpenBLAS DGEMM on Intel Haswell,

12/30/15

pos...@gmail.com

9/11/14

DGEMM performance on Haswell-E (Core i7-5930K)

I compiled OpenBLAS on a recent Core i7-5930K which belongs to a new Haswell-E class of processors. I

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DGEMM performance on Haswell-E (Core i7-5930K)

I compiled OpenBLAS on a recent Core i7-5930K which belongs to a new Haswell-E class of processors. I

9/11/14

Santa Claus, … José Luis García Pallero7

7/4/14

Performance comparison of OpenBLAS, MKL and Matlab for executing DGEMM

Dear Pallero, Thanks for your detailed explanations, which have corrected my poor extrapolation.

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Performance comparison of OpenBLAS, MKL and Matlab for executing DGEMM

Dear Pallero, Thanks for your detailed explanations, which have corrected my poor extrapolation.

7/4/14

5/22/14

segmentation fault in dgemv_n() when using more than a certain number of threads

The sentence " This is allocated on the heap" refers to the 50X50 matrix of doubles On

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segmentation fault in dgemv_n() when using more than a certain number of threads

The sentence " This is allocated on the heap" refers to the 50X50 matrix of doubles On

5/22/14

Jeff Hammond, … martin-frbg32

7/12/20

ARM performance comparison of ATLAS, OpenBLAS and BLIS

Unfortunately Werner has not been seen on this project (or github in general) since early 2017. Some

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ARM performance comparison of ATLAS, OpenBLAS and BLIS

Unfortunately Werner has not been seen on this project (or github in general) since early 2017. Some

7/12/20

abhishek sharma, Zhang Xianyi2

12/19/13

Pre-built binaries vs Compiled binaries: SPEED

Hi abhishek, I don't think there is a significant performance gap between pre-built binaries and

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Pre-built binaries vs Compiled binaries: SPEED

Hi abhishek, I don't think there is a significant performance gap between pre-built binaries and

12/19/13

7/1/13

A bounty for optimizing BLAS3 on Raspberry Pi

Hi all, I just created a bounty on bountysource.com. I offered $100 to optimize BLAS3 on Raspberry Pi

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A bounty for optimizing BLAS3 on Raspberry Pi

Hi all, I just created a bounty on bountysource.com. I offered $100 to optimize BLAS3 on Raspberry Pi

7/1/13

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