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== AVX512 Limitations == | == AVX512 Limitations == | ||
Note that current versions of Valgrind are unable to handle the | Note that current versions of Valgrind are unable to handle the [https://en.wikipedia.org/wiki/AVX-512 AVX-512] instructions used on the latest Intel processors, producing an error message like the following, | ||
<source> | <source> | ||
vex amd64->IR: unhandled instruction bytes: 0x62 0xF1 0xFE 0x8 0x6F 0x8B 0xE8 0xFF 0xFF 0xFF | vex amd64->IR: unhandled instruction bytes: 0x62 0xF1 0xFE 0x8 0x6F 0x8B 0xE8 0xFF 0xFF 0xFF | ||
| Line 19: | Line 19: | ||
... | ... | ||
</source> | </source> | ||
You can circumvent this problem by first loading the | Note that on [[Béluga]], the default environment uses these AVX-512 instructions. You can circumvent this problem by | ||
first loading the AVX-2 environment, | |||
{{Command|module load arch/avx2}} | {{Command|module load arch/avx2}} | ||
and then recompiling your application from scratch to ensure the binary doesn't contain any such instructions. | and then recompiling your application from scratch to ensure the binary doesn't contain any such instructions. | ||