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: [email protected]
Reporter: [email protected]
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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