An Early Look At The Linux 4.16 Kernel Performance With AMD EPYC
Written by Michael Larabel in Software on 10 March 2018. Page 2 of 4. 2 Comments

The impact of fending off Spectre remains relatively small and much less noticeable than the impact on Intel hardware with needing kernel page-table isolation (KPTI) for also addressing the Meltdown vulnerability that affects their chips to date.

Disabling the Retpoline support via the spectre_v2=off does restore the performance to around the ~4.14 or better performance levels for this SSD + EPYC server.

Though in some I/O tests, Linux 4.16 remains slower even with Retpoline support disabled.

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