New AMD ERAPS Feature Yields Additional Performance Gains On Zen 5

[the-burrito-triangle]

And the gulf in performance between Zen 5 and Intel's Arrow Lake just got larger, lol. Sucks to be Intel right now. I say this as a long time Intel user still stuck on a power hungry Rocket Lake workstation.

[kylothow]

Hopefully they are not pulled back because of any silicon errors

Don't worry, this isn't Intel we're talking about ;-)

[Squisher]

Hopefully they are not pulled back because of any silicon errors

[lowflyer]

It looks like AMD is listening to Linus' rants:

https://www.phoronix.com/news/Torvalds-Frustrated-Buggy-HW

Truth is that AMD has done it in the past and continues to take security issues seriously. Intel is known for playing it fast and loose.

[Times Two]

Wow. That's amazing. Thank goodness AMD saved us from Intel and Itanium with its x86-64 ISA and Athlon 64, and continues to push the envelope today. Yes, the Bulldozer era was disappointing and difficult, but many others and I stuck with AMD through the tough times as we knew how expensive and stagnant an Intel only world would be. And low and behold we were ultimately rewarded with Zen, which has simply been awesome.

Indeed and for me personally these are welcome tidings as I am for the first time in a good many years in possession of a current gen CPU, namely a Zen-5 processor.

[muncrief]

Wow. That's amazing. Thank goodness AMD saved us from Intel and Itanium with its x86-64 ISA and Athlon 64, and continues to push the envelope today. Yes, the Bulldozer era was disappointing and difficult, but many others and I stuck with AMD through the tough times as we knew how expensive and stagnant an Intel only world would be. And low and behold we were ultimately rewarded with Zen, which has simply been awesome.

[Errinwright]

Comparing ERAPS against mitigations=off would give us a better picture of its efficiency

Given it is still a mostly mitigated scenario it makes most sense as benchmarked.

[Kjell]

deliver some additional gains on new AMD Zen 5 systems by allowing some existing software security mitigations to be avoided.

Comparing ERAPS against mitigations=off would give us a better picture of its efficiency

[phoronix]

Phoronix: New AMD ERAPS Feature Yields Additional Performance Gains On Zen 5

At the beginning of November I wrote about AMD Linux engineers posting Linux patches enabling a new "ERAPS" feature for Zen 5. ERAPS wasn't talked about by AMD at the Zen 5 launches of the Ryzen 9000 / Ryzen AI 300 series or with the more recent EPYC 9005 "Turin" launch but when enabled, the Enhanced Return Address Prediction Security feature can help deliver some additional gains on new AMD Zen 5 systems by allowing some existing software security mitigations to be avoided. Here are some preliminary comparison benchmarks showing the benefit in affected workloads for using ERAPS on Linux with AMD Zen 5.

https://www.phoronix.com/review/amd-zen5-eraps