copy&paste interim summary from upstream thread
Summary:
- CPU: Intel Skylake
- Linux environment: Ubuntu 18.04
- Compiler: GCC 7 or 8
- Scenario: testpmd crashes when it starts forwarding
- Behaviour: AVX2 version of rte_memcpy() fails if optimized for AVX512
- Context: inline rte_memcpy() is called from
inline rte_mempool_put_bulk(), called from
mlx5_tx_complete() (inline or not)
- Analysis: AVX512 optimization changes vmovdqu to vmovdqu8
Latest status can be found in Bugzilla:
https://bugs.dpdk.org/show_bug.cgi?id=97#c35
** Bug watch added: bugs.dpdk.org/ #97
https://bugs.dpdk.org/show_bug.cgi?id=97
** Also affects: gcc-7 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1799397
Title:
[dpdk]rte_memcpy() moves data incorrectly on Ubuntu 18.04 on Intel
Skylake.
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