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.y...@nifty.ne.jp> -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
