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illegal instruction on Linux

Tang__Xianghao
Beginner
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I met a illegal instruction issue on Intel Gold 5118 CPU and suspect it's caused by AVX-512 instructions in MKL.

Flags in /proc/cpuinfo on the issue machine only contain avx512f and avx512cd and don't contain avx512vl, avx512dq and avx512bw, while the CPU should support all of them.

 

What will happen if Linux kernel version is < 4.6 on issue machine and only avx512f and avx512cd are supported in the kernel?

Can MKL instruction set dispatching work well in this environment?

 

The MKL version is 2019.0.0

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2 Replies
Gennady_F_Intel
Moderator
235 Views

Do you have a test case which we could run and check the problem?

Gennady_F_Intel
Moderator
235 Views

is there any test case?

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