Another Look At The Performance Impact To IBM's POWER9 L1d Flushing Change

Written by Michael Larabel in Software on 4 December 2020. Page 2 of 4. 5 Comments

On this larger POWER9 server backed by a Samsung 860 SATA 3.0 solid-state drive, the performance hit tended to be more noticeable than on the smaller POWER9 Blackbird test system.

In other I/O workloads as well there tended to be a measurable difference from this kernel change to beef up the POWER9 CPU security.

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