[gmx-developers] Segfault in 2021-beta1 enabling SVE and ArmIE emulator

[Paul bauer]

Hello,

thanks for informing us about this, please open an issue on the GitLab 
issue tracker, I can then tag the people that can help with this.
We don't have ARM/SVE hardware here our self in Stockholm to test this 
in CI.

Cheers

Paul

On 27/10/2020 09:58, Guido Giuntoli wrote:
>
> Hi,
>
> I have run the nonbonded-benchmark using the ArmIE emulator.
>
> I compiled gmx_d (DOUBLE FP) with GCC 10.2 for SVE by using:
>
> *CC=gcc-10 CXX=g++-10 \*
>
> *cmake .. \*
>
> *        -DCMAKE_BUILD_TYPE=Release \*
>
> *-DCMAKE_C_FLAGS="-march=armv8-a+sve" \*
>
> *-DCMAKE_CXX_FLAGS="-march=armv8-a+sve" \*
>
> *        -DGMX_MPI=off \*
>
> *        -DGMX_GPU=off \*
>
> *        -DGMX_USE_OPENCL=off \*
>
> *        -DGMX_BUILD_MDRUN_ONLY=off \*
>
> *        -DGMX_DOUBLE=on \*
>
> *        -DGMX_SIMD=ARM_SVE \*
>
> *        -DBUILD_SHARED_LIBS=off \*
>
> *        -DGMX_FFT_LIBRARY=fftw3 \*
>
> *        -DGMX_INSTALL_NBLIB_API=OFF \*
>
> *        -DGMXAPI=OFF \*
>
> *        | tee cmake.log*
>
> I ran the benchmark with:
>
> *armie -msve-vector-bits=256 \*
>
> *        gmx_d nonbonded-benchmark \*
>
> *        -size 1 \*
>
> *        -nt 1 \*
>
> *        -simd 4xm \*
>
> *        -coulomb ewald \*
>
> *        -notable \*
>
> *        -combrule geometric \*
>
> *        -nohalflj \*
>
> *        -noenergy \*
>
> *        -noall \*
>
> *        -cutoff 1 \*
>
> *        -iter 5 \*
>
> *        -warmup 0 \*
>
> *        -nocycles*
>
> I get:
>
> *armie's SVESigHandler caught signal SIGSEGV from the process being 
> emulated, passing it to the default signal handler.*
>
> *Guest process terminated by signal: 15152 Segmentation fault /home/… 
> /codes/gromacs/gromacs-2021-beta1/build-sve/bin/gmx_d*
>
> According to the last meeting, I am eager to know if this branch has 
> passed the regression tests using SVE. BTW, are you using SVE-enabled 
> hardware or emulation for your development/tests?
>
> *Best regards | Mit freundlichen Grüßen*
>
> **
>
> *Guido Giuntoli***
>
> **
>
> HUAWEI TECHNOLOGIES Duesseldorf GmbH
> Hansaallee 205, 40549 Dusseldorf, Germany, *www.huawei.com* 
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>
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-- 
Paul Bauer, PhD
GROMACS Development Manager
KTH Stockholm, SciLifeLab
0046737308594

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