[ANNOUNCEMENT] Updated: openblas-0.3.14-1
Takashi Yano
takashi.yano@nifty.ne.jp
Wed May 19 09:12:18 GMT 2021
On Wed, 31 Mar 2021 21:03:03 +0200
Marco Atzeri wrote:
> New releases 0.3.14-1 of
>
> openblas (source)
> libopenblas (dinamic library)
>
> are available in the Cygwin distribution :
>
> CHANGES
> Last upstream release bugfix and performance improvment
> https://github.com/xianyi/OpenBLAS/releases
>
> OpenBLAS will now provide enough buffer space for at
> least 50 threads by default.
>
> DESCRIPTION
> OpenBLAS is an optimized BLAS library based on
> GotoBLAS2 1.13 BSD version and further extended.
> OpenBLAS is licensed under the 3-clause BSD license.
>
> HOMEPAGE
> http://www.openblas.net/
>
> CYGWIN NOTES
> 1) As BLAS it is around 5-10 times faster than Netlib reference,
> included in the liblapack0 package.
>
> 2) No devel package is provided as liblapack-devel already provide
> the needed headers and import.
> Openblas is fully compatible with Netlib BLAS.
>
> 3) libopenblas consist of a single file
> /usr/bin/cygblas-0.dll
> that will precede in PATH the liblapack0
> /usr/lib/lapack/cygblas-0.dll
> and used instead. Removing libopenblas will restore the
> usage of Netlib BLAS
>
> 4) CPU architecture covered up to now
>
> 64 bit
> ATOM BARCELONA BOBCAT BULLDOZER CORE2 DUNNINGTON EXCAVATOR
> HASWELL NANO NEHALEM OPTERON OPTERON_SSE3 PENRYN PILEDRIVER
> PRESCOTT SANDYBRIDGE STEAMROLLER ZEN
>
> 32 bit
> ATHLON ATOM BANIAS BARCELONA BOBCAT COPPERMINE CORE2
> DUNNINGTON KATMAI NANO NEHALEM NORTHWOOD OPTERON
> OPTERON_SSE3 PENRYN PRESCOTT
After upgrading libopenblas from 0.3.12-2 to 0.3.14-1,
octave 5.2.0 crashes on plot command in 64 bit environment.
In 32 bit cygwin (WoW64), this does not happen. Reverting
libopenblas to 0.3.12-1 resolve the issue.
octave:1> plot([])
fatal: caught signal Illegal instruction -- stopping myself...
Illegal instruction(core dumped)
My environment:
OS: Windows 10 20H2 (64 bit)
CPU: Inte Core i7 870 (Lynnfield)
[yano@Express5800-S70 ~]$ cygcheck -c cygwin octave libopenblas
Cygwin Package Information
Package Version Status
cygwin 3.2.0-1 OK
libopenblas 0.3.14-1 OK
octave 5.2.0-1 OK
By starting octave-cli in gdb, it stops at vmovaps instruction
in gemm_(). IIUC, vmovaps is an AVX instruction which is not
supported by Core i7 870.
In another PC with Core i7-4790 which supports AVX, the issue
does not occur.
--
Takashi Yano <takashi.yano@nifty.ne.jp>
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