> For the complete documentation index, see [llms.txt](https://docs-ksc.gitbook.io/blog/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs-ksc.gitbook.io/blog/tips/common/cpu-related-error-illegal-instruction.md).

# CPU 관련 오류 사항 ( illegal instruction )

* 오류 내용
  * Program Exception - illegal instruction
* 원인
  * CPU에 최적화된 옵션을 사용한 프로그램이 다른 타입의 CPU 에서 실행 하는 경우 발생합니다.
* 조치사항
  * 사용할 CPU 타입에 맞게 프로그램을 재 컴파일을 진행 해야 합니다.
  * 각 컴파일러 별 CPU 타입에 맞는 최적화 옵션은 아래 참고 사항을 확인하시기 바랍니다.

**※ 참고 : 컴파일러 별 AVX-512 옵션** 

각 컴파일러들에서 INTEL AVX-512(Advanced Vector Extensions 512) 를 활성화 시키는 옵션입니다.

INTEL AVX-512 참고 : <https://en.wikipedia.org/wiki/AVX-512>

**\[GNU]**

\- Skylake : -march=skylake-avx512

\- KNL : -march=knl

&#x20;

**\[Intel]**

\- Skylake : -xCORE-AVX512

\- KNL : -xMIC-AVX512

※ 참고 : <https://software.intel.com/en-us/articles/compiling-for-the-intel-xeon-phi-processor-and-the-intel-avx-512-isa>

**\[PGI]**

\- Skylake : -tp=skylake

\- KNL : -tp=knl

※ 참고 : <https://www.pgroup.com/resources/docs/18.1/x86/pgi-release-notes/index.htm>


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