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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

Jam Chan, … Jeff Hammond10

5/5/20

AVX512 supported on CASCADE

-march=skylake-avx512 was added starting in GCC 6 (https://gcc.gnu.org/gcc-6/changes.html). You seem

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AVX512 supported on CASCADE

-march=skylake-avx512 was added starting in GCC 6 (https://gcc.gnu.org/gcc-6/changes.html). You seem

5/5/20

Jim Galarowicz, martin-frbg3

5/20/19

Does openblas build on IBM Power9 systems (ppc64le) with xl compilers?

Hi - Thank you for the reply! I appreciate your response. We will proceed with gcc. Since I posted

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Does openblas build on IBM Power9 systems (ppc64le) with xl compilers?

Hi - Thank you for the reply! I appreciate your response. We will proceed with gcc. Since I posted

5/20/19

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

12/15/16

Don't have prebuild shared library for 32bit openblas library

My os is windows

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Don't have prebuild shared library for 32bit openblas library

My os is windows

12/15/16

Prune, ragini sharma3

2/26/17

OpenBLAS common.h fails to compile when building BVLC Caffe

Even I get this error. How did you fix it? On Monday, November 7, 2016 at 5:06:22 PM UTC-7, Prune

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OpenBLAS common.h fails to compile when building BVLC Caffe

Even I get this error. How did you fix it? On Monday, November 7, 2016 at 5:06:22 PM UTC-7, Prune

2/26/17

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

Iakov, Zhang Xianyi2

9/6/16

compile-time openblas define

Hi Iakov, Good point. On compiling time, we didn't define "OPENBLAS" macro. Xianyi 2016

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compile-time openblas define

Hi Iakov, Good point. On compiling time, we didn't define "OPENBLAS" macro. Xianyi 2016

9/6/16

Florian Kelber2

7/22/16

OpenBlas cross compile for Cortex-M4

Maybe another useful information: I don't want to run OpenBlas on top of an Operating System but

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OpenBlas cross compile for Cortex-M4

Maybe another useful information: I don't want to run OpenBlas on top of an Operating System but

7/22/16

alejand...@gmail.com, Zhang Xianyi2

5/11/16

OpenBLAS build error: debian on sparc

Hi, We didn't test and support sparc architecture. Xianyi 2016-05-11 11:06 GMT-04:00 <alejand.

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OpenBLAS build error: debian on sparc

Hi, We didn't test and support sparc architecture. Xianyi 2016-05-11 11:06 GMT-04:00 <alejand.

5/11/16

Tavis Elliott, Zhang Xianyi3

3/29/16

Unable to compile on Ubuntu 14.04

Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz On Tue, Mar 29, 2016 at 8:55 AM, Zhang Xianyi <traits.

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Unable to compile on Ubuntu 14.04

Intel(R) Core(TM) i7-4800MQ CPU @ 2.70GHz On Tue, Mar 29, 2016 at 8:55 AM, Zhang Xianyi <traits.

3/29/16

3/23/16

OpenBLAS 2.17 gcc 5.3.0 warning message

It has just been pointed out to me that I mistook CHAR_NAME and CHAR_CNAME when looking at the make

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OpenBLAS 2.17 gcc 5.3.0 warning message

It has just been pointed out to me that I mistook CHAR_NAME and CHAR_CNAME when looking at the make

3/23/16

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

11/18/15

Install quantum espresso using the OpenBLAS library

Dear OpenBLAS users I'm relative new to linux. Currently, I want to install quantum espresso on

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Install quantum espresso using the OpenBLAS library

Dear OpenBLAS users I'm relative new to linux. Currently, I want to install quantum espresso on

11/18/15

10/23/15

Using OpenBlas with JBLAS

Hi everybody, I'd like to use OpenBlas on JBLAS. If someone installed and used, could you help me

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Using OpenBlas with JBLAS

Hi everybody, I'd like to use OpenBlas on JBLAS. If someone installed and used, could you help me

10/23/15

liumil...@gmail.com, Zhang Xianyi3

10/18/15

Segmentation Fault using cblas_sgemm

I think I fixed this bug.I read the issues yesterday.Now I build it with USE_THREAD=0.And no cores.

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Segmentation Fault using cblas_sgemm

I think I fixed this bug.I read the issues yesterday.Now I build it with USE_THREAD=0.And no cores.

10/18/15

Eos Pengwern, Zhang Xianyi2

10/5/15

Simple static library in Windows

Please try make NO_SHARED=1 NO_LAPACK=1 USE_THREAD=0 2015-09-14 7:52 GMT-05:00 Eos Pengwern <

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Simple static library in Windows

Please try make NO_SHARED=1 NO_LAPACK=1 USE_THREAD=0 2015-09-14 7:52 GMT-05:00 Eos Pengwern <

10/5/15

Jørgen Nordmoen, Zhang Xianyi5

9/3/15

Problems compiling for ARM

Please don't change CORE. ifeq ($(CORE), ARMV5) CCOMMON_OPT += -marm -mfpu=neon-vfpv4 -mtune=

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Problems compiling for ARM

Please don't change CORE. ifeq ($(CORE), ARMV5) CCOMMON_OPT += -marm -mfpu=neon-vfpv4 -mtune=

9/3/15

Sergey Serebryakov, … Dai Zander8

4/22/15

OpenBLAS and OpenMP in a single application

Xianyi, thanks so much! The answer is super neat and helpful. Zihang On Wednesday, April 22, 2015 at

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OpenBLAS and OpenMP in a single application

Xianyi, thanks so much! The answer is super neat and helpful. Zihang On Wednesday, April 22, 2015 at

4/22/15

johnny b, Zhang Xianyi2

3/5/15

High-level multithreading using c++11 feature std::thread conflicts with OpenBLAS multithreading?

Hi Johannes, Thank you for your report. How did you control the number of threads for OpenBLAS

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High-level multithreading using c++11 feature std::thread conflicts with OpenBLAS multithreading?

Hi Johannes, Thank you for your report. How did you control the number of threads for OpenBLAS

3/5/15

John Gliksberg, Zhang Xianyi2

11/28/14

About cblas_dgbmv

Hi , For the gbmv, OpenBLAS doesn't provide a gbmv assembly kernels. If OPENBLAS_NUM_THREADS=1 (

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About cblas_dgbmv

Hi , For the gbmv, OpenBLAS doesn't provide a gbmv assembly kernels. If OPENBLAS_NUM_THREADS=1 (

11/28/14

Avraham Adler, Zhang Xianyi4

10/23/14

common_quad.h missing?

Yes, I will remove this flag. 2014-10-23 20:10 GMT+08:00 Avraham Adler <avraha...@gmail.com

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common_quad.h missing?

Yes, I will remove this flag. 2014-10-23 20:10 GMT+08:00 Avraham Adler <avraha...@gmail.com

10/23/14

XuFeng Lin, … nagy...@gmail.com12

2/3/16

"Unhandled exception at * Access violation at location *" Openblas

2014. szeptember 1., hétfő 5:46:33 UTC+2 időpontban Zongying Gong a következőt írta: Hi Werner: Thank

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"Unhandled exception at * Access violation at location *" Openblas

2014. szeptember 1., hétfő 5:46:33 UTC+2 időpontban Zongying Gong a következőt írta: Hi Werner: Thank

2/3/16

Fanglin Wang, Zhang Xianyi4

7/14/14

libgfortran_64-3.dll problem: Windows8-64bit, Intel i7-4500u, MinGW-64

This issue has been fixed after I installing a new MinGW-64. Now the code works normally. The

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libgfortran_64-3.dll problem: Windows8-64bit, Intel i7-4500u, MinGW-64

This issue has been fixed after I installing a new MinGW-64. Now the code works normally. The

7/14/14

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

Hao Wu, Zhang Xianyi2

4/2/14

Got the error message: "The number of CPU/Cores(80) is beyond the limit(64). Terminated."

Hi, Yes, it is too old. Please try v0.2.9.rc2 version. I think it already fixed this issue. 2014-04-

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Got the error message: "The number of CPU/Cores(80) is beyond the limit(64). Terminated."

Hi, Yes, it is too old. Please try v0.2.9.rc2 version. I think it already fixed this issue. 2014-04-

4/2/14

SecretAardvark, Zhang Xianyi3

3/13/14

openblas_set_num_threads() not declared in this scope

No worries. I figured out what it was doing. I had to explicitly tell it to use the openblas cblas.h

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openblas_set_num_threads() not declared in this scope

No worries. I figured out what it was doing. I had to explicitly tell it to use the openblas cblas.h

3/13/14

christia...@gmail.com, Zhang Xianyi3

2/14/14

OpenBLAS in R only single core in linux

Thanks for your answer. 2014-02-14 1:23 GMT+08:00 <christia...@gmail.com>: I figured it

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OpenBLAS in R only single core in linux

Thanks for your answer. 2014-02-14 1:23 GMT+08:00 <christia...@gmail.com>: I figured it

2/14/14

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