[DPDK/other Bug 1656] AVX-512 support disabled

[bugzilla at dpdk.org]

https://bugs.dpdk.org/show_bug.cgi?id=1656

            Bug ID: 1656
           Summary: AVX-512 support disabled
           Product: DPDK
           Version: 18.11
          Hardware: All
                OS: Other
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: other
          Assignee: dev at dpdk.org
          Reporter: nandinipersad361 at gmail.com
  Target Milestone: ---

AVX-512 support has been disabled on some conditions.

On DPDK v18.11 AVX-512 is disabled for all GCC builds which reported to cause a
performance drop.

On DPDK v19.02 AVX-512 disable scope is reduced to GCC and binutils version
2.30 based on information accrued from the GCC community defect.

Reason:
Generated AVX-512 code cause crash: https://bugs.dpdk.org/show_bug.cgi?id=97
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88096

Resolution/Workaround:
Update binutils to newer version than 2.30.

OR

Use different compiler, like clang for this case.

Affected Environment/Platform:
GCC and binutils version 2.30.

Driver/Module:
ALL.

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