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OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.

Octocat-spinner-32 benchmark Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 ctest Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 driver Add cast to function pointer to remove warning February 25, 2014
Octocat-spinner-32 exports Refs #324. Upgrade LAPACK to 3.5.0 version. December 09, 2013
Octocat-spinner-32 interface bugfix for sdsdot February 28, 2014
Octocat-spinner-32 kernel bugfix for sdsdot February 28, 2014
Octocat-spinner-32 lapack-netlib Fixed #334 a makefile bug in lapacke. January 19, 2014
Octocat-spinner-32 lapack Merge remote branch 'origin/develop' into armv7 December 01, 2013
Octocat-spinner-32 reference Fixed a build bug with NO_LAPACK=1 and SANNITY_CHECK=1. May 03, 2011
Octocat-spinner-32 test Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 utest Make sure that fork_test.c is not built under windows February 19, 2014
Octocat-spinner-32 .gitignore Refs #247. Included lapack source codes. Avoid downloading tar.gz fro… July 09, 2013
Octocat-spinner-32 .travis.yml Updated travis. July 12, 2013
Octocat-spinner-32 BACKERS.md Added backers. September 05, 2013
Octocat-spinner-32 CONTRIBUTORS.md Release 0.2.9 rc1 version. December 13, 2013
Octocat-spinner-32 Changelog.txt #351. Release 0.2.9 rc2. March 06, 2014
Octocat-spinner-32 GotoBLAS_00License.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 GotoBLAS_01Readme.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 GotoBLAS_02QuickInstall.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 GotoBLAS_03FAQ.txt Refs #85 #104. Use patch instead of git to apply this segfaults.patch. May 08, 2012
Octocat-spinner-32 GotoBLAS_04FAQ.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 GotoBLAS_05LargePage.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 GotoBLAS_06WeirdPerformance.txt rename documents in GotoBLAS. January 24, 2011
Octocat-spinner-32 LICENSE Fixed a typo in license file. March 27, 2012
Octocat-spinner-32 Makefile refs #287. Don't enable OpenMP for netlib LAPACK sequential Fortran c… November 02, 2013
Octocat-spinner-32 Makefile.alpha Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 Makefile.arm added cpu detection and target ARMV6, used in raspberry pi November 21, 2013
Octocat-spinner-32 Makefile.arm64 added experimental support for ARMV8 November 24, 2013
Octocat-spinner-32 Makefile.generic Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 Makefile.ia64 Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 Makefile.install More robust OPENBLAS_ prefixing of macros in openblas_config.h February 24, 2014
Octocat-spinner-32 Makefile.mips64 Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 Makefile.power Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 Makefile.prebuild get rid of the generated cblas_noconst.h file August 28, 2013
Octocat-spinner-32 Makefile.rule #351. Release 0.2.9 rc2. March 06, 2014
Octocat-spinner-32 Makefile.sparc Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 Makefile.system Refs #329 #287. Only disable -fopenmp for LAPACK Fortran codes on Win… January 24, 2014
Octocat-spinner-32 Makefile.tail Avoid argument list too long issue in make clean. November 07, 2013
Octocat-spinner-32 Makefile.x86 Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 Makefile.x86_64 Respect user's LDFLAGS July 25, 2013
Octocat-spinner-32 README.md Added backers. September 05, 2013
Octocat-spinner-32 TargetList.txt TargetList.txt: minor re-ordering March 17, 2013
Octocat-spinner-32 c_check modified c_check December 01, 2013
Octocat-spinner-32 cblas.h get rid of the generated cblas_noconst.h file August 28, 2013
Octocat-spinner-32 cblas_noconst.h added missing file cblas_noconst.h to the armv7 branch November 03, 2013
Octocat-spinner-32 common.h Used SwitchToThread for YIELDING on AMD piledriver with Windows. January 28, 2014
Octocat-spinner-32 common_alpha.h Refs #262. Fixed compatibility issues of GNU stack markings with Path… September 22, 2013
Octocat-spinner-32 common_arm.h redefined functions for TIMING and YIELDING for ARMV7 processor November 03, 2013
Octocat-spinner-32 common_arm64.h added experimental support for ARMV8 November 24, 2013
Octocat-spinner-32 common_c.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_d.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_ia64.h Refs #262. Fixed compatibility issues of GNU stack markings with Path… September 22, 2013
Octocat-spinner-32 common_interface.h Fixed #141. make f77blas.h compatible with compilers which lack C99 c… October 08, 2012
Octocat-spinner-32 common_lapack.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_level1.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_level2.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_level3.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_linux.h Refs #248. Fixed the LSB compatiable issue for BLAS only. July 09, 2013
Octocat-spinner-32 common_macro.h Refs #47. On Loongson 3A, set DGEMM_R parameter depending on differen… September 05, 2011
Octocat-spinner-32 common_mips64.h Refs #262. Fixed compatibility issues of GNU stack markings with Path… September 22, 2013
Octocat-spinner-32 common_param.h refs #55. Added DTB_ENTRIES into dynamic arch setting parameters. Now… September 05, 2011
Octocat-spinner-32 common_power.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_q.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_reference.h Added the test case for samax. April 26, 2012
Octocat-spinner-32 common_s.h bugfix for sdsdot February 28, 2014
Octocat-spinner-32 common_sparc.h Refs #262. Fixed compatibility issues of GNU stack markings with Path… September 22, 2013
Octocat-spinner-32 common_thread.h Refs #281. Detect __CYGWIN__ macro for Cygwin x86_64. August 24, 2013
Octocat-spinner-32 common_x.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 common_x86.h merged common_x86.h and common_x86_64.h from develop December 01, 2013
Octocat-spinner-32 common_x86_64.h merged common_x86.h and common_x86_64.h from develop December 01, 2013
Octocat-spinner-32 common_z.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 cpuid.S Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 cpuid.h Init code base for Intel Haswell. August 13, 2013
Octocat-spinner-32 cpuid_alpha.c refs #55. Added DTB_ENTRIES into dynamic arch setting parameters. Now… September 05, 2011
Octocat-spinner-32 cpuid_arm.c added cpu detection and target ARMV6, used in raspberry pi November 21, 2013
Octocat-spinner-32 cpuid_ia64.c refs #55. Added DTB_ENTRIES into dynamic arch setting parameters. Now… September 05, 2011
Octocat-spinner-32 cpuid_mips.c Fixed the detection bug on Loongson 3A server. September 21, 2012
Octocat-spinner-32 cpuid_power.c Refs #220. Support Power7 by old Power6 kernels. May 21, 2013
Octocat-spinner-32 cpuid_sparc.c refs #55. Added DTB_ENTRIES into dynamic arch setting parameters. Now… September 05, 2011
Octocat-spinner-32 cpuid_x86.c Refs #335. Added the fallback of L2 size detection for some virtual m… January 08, 2014
Octocat-spinner-32 ctest.c Refs #355. Fixed ARM detection bug. March 22, 2014
Octocat-spinner-32 ctest1.c Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 ctest2.c Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 f_check Refs #266. Fixed the compiling bug with Open64 5.0. July 31, 2013
Octocat-spinner-32 ftest.f Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 ftest2.f Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 ftest3.f Refs #266. Fixed the compiling bug with Open64 5.0. July 31, 2013
Octocat-spinner-32 getarch.c Merge remote branch 'origin/haswell' into develop December 01, 2013
Octocat-spinner-32 getarch_2nd.c Fixed typo in getarch_2nd.c. July 29, 2013
Octocat-spinner-32 l1param.h Added BULLDOZER target. So far it uses barcelona kernels. December 07, 2012
Octocat-spinner-32 l2param.h Support AMD Piledriver by bulldozer kernels. July 06, 2013
Octocat-spinner-32 make.inc Refs #176. Fixed make.inc overriding RANLIB bug when cross-compiling … January 03, 2013
Octocat-spinner-32 openblas_config_template.h Fixed #315. Added OPENBLAS_ prefix to openblas_config.h. November 02, 2013
Octocat-spinner-32 param.h modified param.h December 01, 2013
Octocat-spinner-32 patch.for_lapack-3.1.1 Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 patch.for_lapack-3.4.0 Refs #88. Fixed the build bug about LAPACKE C Interface to LAPACKE. April 13, 2012
Octocat-spinner-32 patch.for_lapack-3.4.1 Refs #130 Prevent reading ipiv array beyond the bound in ?laswp. Use … August 09, 2012
Octocat-spinner-32 patch.for_lapack-3.4.2 Added the patch for lapacke example. November 13, 2012
Octocat-spinner-32 quickbuild.32bit Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 quickbuild.64bit Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 quickbuild.win32 Added the tip for Windows. August 09, 2012
Octocat-spinner-32 quickbuild.win64 Added the tip for Windows. August 09, 2012
Octocat-spinner-32 segfaults.patch Refs #85 #104. Use patch instead of git to apply this segfaults.patch. May 08, 2012
Octocat-spinner-32 symcopy.h Import GotoBLAS2 1.13 BSD version codes. January 24, 2011
Octocat-spinner-32 version.h changed library name to openblas and modified environment variable. January 24, 2011
README.md

OpenBLAS

Build Status

Introduction

OpenBLAS is an optimized BLAS library based on GotoBLAS2 1.13 BSD version.

Please read the documents on OpenBLAS wiki pages http://github.com/xianyi/OpenBLAS/wiki.

Binary Packages

We provide binary packages for the following platform.

  • Windows x86/x86_64

You can download them from file hosting on sourceforge.net.

Installation from Source

Download from project homepage. http://xianyi.github.com/OpenBLAS/

Or, check out codes from git://github.com/xianyi/OpenBLAS.git

Normal compile

  • type "make" to detect the CPU automatically. or
  • type "make TARGET=xxx" to set target CPU, e.g. "make TARGET=NEHALEM". The full target list is in file TargetList.txt.

Cross compile

Please set CC and FC with the cross toolchains. Then, set HOSTCC with your host C compiler. At last, set TARGET explicitly.

Examples:

On X86 box, compile this library for loongson3a CPU.

make BINARY=64 CC=mips64el-unknown-linux-gnu-gcc FC=mips64el-unknown-linux-gnu-gfortran HOSTCC=gcc TARGET=LOONGSON3A

On X86 box, compile this library for loongson3a CPU with loongcc (based on Open64) compiler.

make CC=loongcc FC=loongf95 HOSTCC=gcc TARGET=LOONGSON3A CROSS=1 CROSS_SUFFIX=mips64el-st-linux-gnu-   NO_LAPACKE=1 NO_SHARED=1 BINARY=32

Debug version

make DEBUG=1

Install to the directory (optional)

Example:

make install PREFIX=your_installation_directory

The default directory is /opt/OpenBLAS

Support CPU & OS

Please read GotoBLAS_01Readme.txt

Additional support CPU:

x86/x86-64:

  • Intel Xeon 56xx (Westmere): Used GotoBLAS2 Nehalem codes.
  • Intel Sandy Bridge: Optimized Level-3 BLAS with AVX on x86-64.
  • Intel Haswell: Optimized Level-3 BLAS with AVX on x86-64 (identical to Sandy Bridge).
  • AMD Bobcat: Used GotoBLAS2 Barcelona codes.
  • AMD Bulldozer: x86-64 S/DGEMM AVX kernels. (Thank Werner Saar)
  • AMD PILEDRIVER: Used Bulldozer codes.

MIPS64:

  • ICT Loongson 3A: Optimized Level-3 BLAS and the part of Level-1,2.
  • ICT Loongson 3B: Experimental

Support OS:

Usages

Link with libopenblas.a or -lopenblas for shared library.

Set the number of threads with environment variables.

Examples:

export OPENBLAS_NUM_THREADS=4

or

export GOTO_NUM_THREADS=4

or

export OMP_NUM_THREADS=4

The priorities are OPENBLAS_NUM_THREADS > GOTO_NUM_THREADS > OMP_NUM_THREADS.

If you compile this lib with USE_OPENMP=1, you should set OMP_NUM_THREADS environment variable. OpenBLAS ignores OPENBLAS_NUM_THREADS and GOTO_NUM_THREADS with USE_OPENMP=1.

Set the number of threads on runtime.

We provided the below functions to control the number of threads on runtime.

void goto_set_num_threads(int num_threads);

void openblas_set_num_threads(int num_threads);

If you compile this lib with USE_OPENMP=1, you should use the above functions, too.

Report Bugs

Please add a issue in https://github.com/xianyi/OpenBLAS/issues

Contact

ChangeLog

Please see Changelog.txt to obtain the differences between GotoBLAS2 1.13 BSD version.

Troubleshooting

  • Please read Faq at first.
  • Please use gcc version 4.6 and above to compile Sandy Bridge AVX kernels on Linux/MingW/BSD.
  • Please use Clang version 3.1 and above to compile the library on Sandy Bridge microarchitecture. The Clang 3.0 will generate the wrong AVX binary code.
  • The number of CPUs/Cores should less than or equal to 256.
  • On Linux, OpenBLAS sets the processor affinity by default. This may cause the conflict with R parallel. You can build the library with NO_AFFINITY=1.
  • On Loongson 3A. make test would be failed because of pthread_create error. The error code is EAGAIN. However, it will be OK when you run the same testcase on shell.

Contributing

  1. Check for open issues or open a fresh issue to start a discussion around a feature idea or a bug.
  2. Fork the OpenBLAS repository to start making your changes.
  3. Write a test which shows that the bug was fixed or that the feature works as expected.
  4. Send a pull request. Make sure to add yourself to CONTRIBUTORS.md.

Donation

Please read this wiki page.

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