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+--- Thread: Intel Security Patch, 35% Performance Loss (/Thread-Intel-Security-Patch-35-Performance-Loss)
Intel Security Patch, 35% Performance Loss - Oni - 03-14-2022
A security patch will be pushed for Intel CPUs, which will lead to a potential 35% performance loss. This loss is significant as it will put the 12900K well behind the performance of other CPUs in the same price bracket (i.e. 5950X).
Quote:Branch History Injection (BHI), a new variant of the Spectre V2 vulnerability affecting several Intel processors and a handful of Arm cores, was announced earlier this week by VUSec, the Systems and Network Security Group at Vrije Universiteit Amsterdam. Linux site Phoronix performed tests showing a 35% drop in performance on the affected processors by the new BHI mitigations.
Intel CPUs show a 35% decrease in performance from the effects of the BHI-variant of Spectre V2
Intel plans to release a security update for the company's affected processors but will take longer to produce due to the number of attacked processors. Readers will remember earlier this week that the Intel processors from the Haskell series are the most vulnerable of the company's chips. The Linux community has already initiated the mitigation to fix the affected CPUs on their operating system. It was very shortly after the announcement of the exploit that an update was already in effect.
Read More: https://wccftech.com/intel-mitigations-spectre-v2-exploit-35-percent-drop-in-cpu-performance/
RE: Intel Security Patch, 35% Performance Loss - zorrophreak - 03-14-2022
35% is a huge hit to be taking in that area. Insane.
RE: Intel Security Patch, 35% Performance Loss - Oni - 03-14-2022
AMD's revised mitigation seems to contrast Intel's, with less than a 10% impact on performance:
https://www.tomshardware.com/news/amd-cpus-see-less-than-10-performance-drop-from-revised-spectre-v2-mitigations
It sounds like this is all somewhat speculative, so I wouldn't be surprised if the actual losses are different.
RE: Intel Security Patch, 35% Performance Loss - K0ng - 04-18-2022
wait, the newer stuff is still susceptible to spectre?
RE: Intel Security Patch, 35% Performance Loss - Oni - 04-19-2022
(04-18-2022, 10:46 PM)K0ng Wrote: wait, the newer stuff is still susceptible to spectre?
Well, a variant of it. "Spectre V2" they've said. Fairly certain updates were pushed by now, but I've heard conflicting reports on performance since then.