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Power Determinism Mode Still Proves Beneficial For AMD EPYC 9005 Performance
Typically in my launch-day Linux reviews of new AMD EPYC processors I try to include results both of the performance determinism (default) and power determinism modes available with these server processors since opting in to the power determinism mode can allow for additional performance uplift at the cost of slightly higher power costs.
With the AMD EPYC 9575F / 9755 / 9965 benchmarks and review I didn't have a chance to complete all of the power determinism runs in time for that review, but for those curious about power vs. performance determinism modes with the 5th Gen AMD EPYC "Turin" processors, here is a side-by-side comparison. For those unfamiliar with this supported tuning knob on AMD servers, the determinism mode controls the policy of the System Management Unit (SMU) for the effective frequency of each core. The only changes during this testing on the AMD Volcano reference server was swapping out the CPUs and adjusting the BIOS determinism mode as stated.
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