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  3. 學習啦>學習電腦>電腦技巧>《什么是超線程》正文

    什么是超線程

    時間:2015-10-11 14:59:41本文內容及圖片來源于讀者投稿,如有侵權請聯系xuexila888@qq.com 廣達 我要投稿

      Intel酷睿i3、i5處理器相信大家都不會陌生,對于處理器中的諸如雙核四線程或者四核八線程很多電腦愛好者都不知道什么意思。下面是超線程的知識,希望學習啦小編整理的對你有用,歡迎閱讀:

      首先超線程我們主要講得是針對Intel酷睿i3以及更高版本SNB處理器均已經采用超線程技術。那么什么是超線程呢?

      超線程是英特爾所研發的一種技術,于2002年發布。超線程的英文是HT技術,全名為Hyper-Threading,中文又名超線程。超線程技術原先只應用于Xeon服務器處理器當中,當時稱為Super-Threading。之后陸續應用在Pentium 4以及當前主流的酷睿系列處理器中,隨著技術的成熟,該技術已經應用于眾多主流處理器當中。采用超線程即是可在同一時間里,應用程序可以使用芯片的不同部分。雖然單線程芯片每秒鐘能夠處理成千上萬條指令,但是在任一時刻只能夠對一條指令進行操作。而超線程技術可以使芯片同時進行多線程處理,使芯片性能得到提升。

    什么是超線程?CPU超線程技術

      超線程與普通線程對比

      可能介紹了以上概念,很多電腦愛好者朋友還是不了解什么是超線程,其實大家可以這樣理解:我們一般處理器有幾個核心就有幾個線程,像我們所熟悉的AMD眾多處理器由于不支持超線程技術,所以當處理器是四核我們就知道其是四線程處理器,留心的朋友可能也會想到我們推薦的不少四核AMD配置中在介紹處理器時總會強調原生四核,其意思就是指真正的四核。那么對于Intel酷睿i3雙核四線程處理器我們該如何理解呢?

      首先可以明確的是酷睿i3是雙核心處理器,但為什么有四個線程呢?這就用到了Intel超線程技術,這其中涉及到了虛擬技術,理解虛擬主機的朋友或許可以很好理解,通過特定技術將雙核心中的每個核芯模擬一個虛擬處理器出來,這就是超線程技術。如上圖所演示的所示,目前超線程技術僅能達到虛擬核芯與物理合理相同的個數,如:酷睿i7為四核八線程,因此這個線程數量是與物理核心數量相一致的。

      假如我們要想要購買一款擁有四核心的電腦,大家首先要搞清楚兩個名詞,一個是“物理四核”,另外一個是“虛擬四核”。這時如果參數中介紹的和我們是一款擁有物理四核處理器那么就可以放心購買。

      以上詳細為大家介紹了什么是超線程技術,相信大家都有一定的了解,可能大家還會有疑惑,超線程技術處理器性能如何呢?比如雙核四線程處理器與原生四核處理器性能相同嗎?答案是否定的,在參數等相當的情況下,當然是原生四核處理器性能更出色,超線程處理器性能低于物理四核處理器,但要高于普通雙核未采用超線程技術雙核處理器。

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