AMD 稱自家晶片對新發現的 MDS 漏洞免疫 - 3C
By Noah
at 2019-05-20T20:25
at 2019-05-20T20:25
Table of Contents
AMD 稱自家晶片對新發現的 MDS 漏洞免疫
Sanji Feng
1 小時前
上週安全專家新公佈的 MDS 漏洞(微架構數據採樣,包含 Zombieload、RIDL、Fallout
、和 Store to Leak Forwarding 四種技巧),已經嚴重到 Intel 晶片的使用者都最好
第一時間去進行修補更新。但問題是,在更新同時安全性雖然上去了,但效能方面又被犧
牲,尤其在多執行緒的模式下影響更甚。而對於這系列新問題,AMD 陣營倒是似乎不必太
擔心。目前廠方已經在官網上宣稱,自家的產品因為有硬體保護檢查的加持,所以會對相
關漏洞免疫。
根據 Linux 專家網站 Phoronix 的測試結果,補上漏洞後使用 Intel 晶片的機器在啟用
超執行緒時平均效能會下降 16%。與此同時 AMD 產品的效能降幅,就只有 3% 而已。在
這樣的前提下,Apple 和 Google 已經建議使用 Intel 晶片電腦的用戶,在更新後最好
是將超執行緒禁用(根據軟體不同,效能跌幅能有 40% 到 50%)。而 AMD 陣營則無需擔
心,仍然可以使用同步多執行緒(SMT)來確保裝置的速度。
要說受超執行緒「封印」影響最大的應該是工作站和伺服器,而這部分業務對 Intel 來
說顯然至關重要。但是 Phoronix 已經指出解決 MDS 帶來的代價,就是「Core
i7-8700K 跟 Ryzen 7 2700X 間的效能差距被大大拉近」,這對 Intel 來說顯然不是什
麼好消息啊。
https://tinyurl.com/y4kpwh7w
樓下c52.exe喊真香
--
作者 mindstack31 (mindmind) 看板 PC_Shopping
標題 Re: [情報] AMD Threadripper NDA解禁
時間 Thu Aug 10 21:33:16 2017
───────────────────────────────────────
--
Sanji Feng
1 小時前
上週安全專家新公佈的 MDS 漏洞(微架構數據採樣,包含 Zombieload、RIDL、Fallout
、和 Store to Leak Forwarding 四種技巧),已經嚴重到 Intel 晶片的使用者都最好
第一時間去進行修補更新。但問題是,在更新同時安全性雖然上去了,但效能方面又被犧
牲,尤其在多執行緒的模式下影響更甚。而對於這系列新問題,AMD 陣營倒是似乎不必太
擔心。目前廠方已經在官網上宣稱,自家的產品因為有硬體保護檢查的加持,所以會對相
關漏洞免疫。
根據 Linux 專家網站 Phoronix 的測試結果,補上漏洞後使用 Intel 晶片的機器在啟用
超執行緒時平均效能會下降 16%。與此同時 AMD 產品的效能降幅,就只有 3% 而已。在
這樣的前提下,Apple 和 Google 已經建議使用 Intel 晶片電腦的用戶,在更新後最好
是將超執行緒禁用(根據軟體不同,效能跌幅能有 40% 到 50%)。而 AMD 陣營則無需擔
心,仍然可以使用同步多執行緒(SMT)來確保裝置的速度。
要說受超執行緒「封印」影響最大的應該是工作站和伺服器,而這部分業務對 Intel 來
說顯然至關重要。但是 Phoronix 已經指出解決 MDS 帶來的代價,就是「Core
i7-8700K 跟 Ryzen 7 2700X 間的效能差距被大大拉近」,這對 Intel 來說顯然不是什
麼好消息啊。
https://tinyurl.com/y4kpwh7w
樓下c52.exe喊真香
--
作者 mindstack31 (mindmind) 看板 PC_Shopping
標題 Re: [情報] AMD Threadripper NDA解禁
時間 Thu Aug 10 21:33:16 2017
───────────────────────────────────────
推 c52chungyuny: 今天是電蝦黑暗的一天08/10 21:57
--
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