News AMD CPUs See Less Than 10% Performance Drop From Revised Spectre-v2 Mitigations

[Admin]

Phoronix tests the impact of the latest revised BHI mitigations on various AMD Ryzen processors.

AMD CPUs See Less Than 10% Performance Drop From Revised Spectre-v2 Mitigations : Read more

 

[ThatMouse]

I didn't understand a single word in the article. Did I miss something?

 

[hotaru.hino]

I didn't understand a single word in the article. Did I miss something?

Intel discovered AMD's fix for mitigating Spectre flaws didn't work, so they provided a fix, AMD shipped it out, and another website, Phoronix, tested to see how much of a performance loss it causes as it's expected these mitigations will cause some performance loss.

Unless you're running a data center, any performance loss is minimal on typical user use-cases.

 

[drivinfast247]

Intel discovered AMD's fix for mitigating Spectre flaws didn't work, so they provided a fix, AMD shipped it out, and another website, Phoronix, tested to see how much of a performance loss it causes as it's expected these mitigations will cause some performance loss.

Unless you're running a data center, any performance loss is minimal on typical user use-cases.

Didn't Intel see a 35% performance loss on the same mitigation?

 

[hotaru.hino]

Didn't Intel see a 35% performance loss on the same mitigation?

Again, these mitigations only matter if you were running something like a data center or whatnot. The areas where there were major performance hits didn't affect the consumer much if at all. https://portswigger.net/daily-swig/...feared-cpu-slowdown-never-really-materialized

 

[TerryLaze]

Didn't Intel see a 35% performance loss on the same mitigation?

Not on the same test, in stress-ng the 5950 lost 54% performance while the 12900k only lost 5.1% in that specific one.
As is normal some tests will have a higher impact on one or the other architecture.
The 35% reduction was for the Core i7-1185G7 and osbench.

 

[Alvar "Miles" Udell]

The performance difference overall is -1.5%. Nothing that should concern anyone up through the HEDT segment, though it is terrible to lose performance over a security vulnerability that poses no risk. A server setup though where you're talking dozens to hundreds of CPUs, even 1.5% is a problem, even moreso if your system depends on factors which are impacted much more greatly.

 

[STbob]

If you want the best performance turn them off with inspectre. It can cause issues in online FPS games. Risk of getting hacked is super low.