First, we have the latest 12th Gen Alder Lake-S Core i9-12900K and the processor loses up to 26.7% performance when measuring the Sockperf throughput. Other than this, the i9-12900K loses anywhere between 2 to 14.5% with the Spectre-BHB patch.
An 11th Gen Tiger Lake Core i7-1185G7 processor was also tested and this time the maximum loss is even greater as an unpatched system performed up to 35.6% better. In another test, the unpatched system was 34.1% faster. Overall, other than these two tests, the unpatched system lost anywhere between 2% to 26.1% performance.
影響は甚大 (スコア:5, 参考になる)
Branch History Injection (BHI) exploit leaking root entry in /etc/shadow
https://youtu.be/537HUwV36ME [youtu.be]
10分程度で /etc/shadow が読み出せるのはインパクトがあります（動画は一部 20倍速なので 1分で見れます）。
Linux はパッチがでているといっても、ようするに機能の封印なのでしょうか、パフォーマンスへの影響は甚大なようです。Intel 12世代 Alder Lake で最大 26.7%、11世代 Tiger Lake で最大 35.6% ダウンという記載がありました。
Even modern Intel CPUs are losing up to 36% performance with the new Spectre BHI patch
https://www.neowin.net/news/even-modern-intel-cpus-are-losing-up-to-36... [neowin.net]
First, we have the latest 12th Gen Alder Lake-S Core i9-12900K and the processor loses up to 26.7% performance when measuring the Sockperf throughput. Other than this, the i9-12900K loses anywhere between 2 to 14.5% with the Spectre-BHB patch.
An 11th Gen Tiger Lake Core i7-1185G7 processor was also tested and this time the maximum loss is even greater as an unpatched system performed up to 35.6% better. In another test, the unpatched system was 34.1% faster. Overall, other than these two tests, the unpatched system lost anywhere between 2% to 26.1% performance.
なお、AMDも該
Re: (スコア:0)
Intelは、毎度うちだけじゃないもんって発表するけど、余所の粗探しする前に自分の所の製品をちゃんとしろよと。
Re:影響は甚大 (スコア:0)
負けてて人的リソース豊富なインテルさんがライバルの優位性を解析すんのは当然
副次で脆弱性見つけてしまうのも当然
Re: (スコア:0)
それは確かに当然だな
古くからあるいい会社だよ負けてるんだし大目に見てやれよ、というのも分かる
今もって業績すごい王者インテルが他所の粗探しすんなよ見苦しい、と感じるのも言いがかりとばかりは言えない
みんな正しいな