The Brutal Performance Impact From Mitigating The LVI Vulnerability

Written by Michael Larabel in Software on 12 March 2020. Page 5 of 6. 76 Comments

LFENCE after loads were also quite detrimental to the ACES DGEMM performance and Coremark, but at least most people shouldn't have the need to use these assembler flags with all their workloads.

The cost of inserting an LFENCE after every load instruction is quite crippling.


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