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Date:	Wed, 19 May 2021 23:25:36 +0900
To:	cygwin AT cygwin DOT com
Subject:	Re: [ANNOUNCEMENT] Updated: openblas-0.3.14-1
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From:	Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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Hi, Marco

On Wed, 19 May 2021 12:56:33 +0200
Marco Atzeri wrote:
> On 19.05.2021 11:12, Takashi Yano via Cygwin wrote:
> > On Wed, 31 Mar 2021 21:03:03 +0200
> > Marco Atzeri wrote:
> >> New releases 0.3.14-1 of
> >>
> > 
> > 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 AT 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.
> > 
> 
> Hi Takashi,
> 
> maybe is time to build the 0.3.15 ....
> https://github.com/xianyi/OpenBLAS/releases
> 
> x86_64:
> 
>      added support for Intel Control-flow Enforcement Technology (CET)
>      reverted the DOMATCOPY_RT code to the generic C version
>      fixed a bug in the AVX512 SGEMM kernel introduced in 0.3.14
>      fixed misapplication of -msse flag to non-SSE cpus in DYNAMIC_ARCH
>      added support for compilation of the benchmarks on older OSX versions
>      fixed propagation of the NO_AVX512 option in CMAKE builds
>      fixed compilation of the AVX512 SGEMM kernel with clang-cl on Windows
>      fixed compilation of the CTESTs with INTERFACE64=1 (random faults 
> on OSX)
>      corrected the Haswell DROT kernel to require AVX2/FMA3 rather than 
> AVX512
> 
> 
> give me some time, openblas is a bit time consuming

Thanks for the information.

I have built openblas 0.3.15 locally, and confirmed that
it works fine with Core i7 870 (Lynnfield).

I will test it if you provide the test version of 0.3.15.

P.S.
The same issue happnes also with Xeon X5680 and v0.3.14.

-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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