Showtime-3.3.37: Implemented a Database - 改機
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By Olive
at 2011-09-25T23:37
at 2011-09-25T23:37
Table of Contents
推 ouyang:事實上 PPE 效能很差吧.... 122.116.66.45 09/25 22:59
→ ouyang:當初SEGA移植 VF5 就有寫一篇專論 122.116.66.45 09/25 23:00
→ ouyang:說PS3 那顆 PPE頂多就是 Pentium4 3.0G左右 122.116.66.45 09/25 23:00
→ ouyang:的整體效能.....很殘 因為PPE本身還要負責 122.116.66.45 09/25 23:01
→ ouyang:幫SPE分配資源 122.116.66.45 09/25 23:01
差不多,用 Linux的 cpuinfo可以看到是顆雙核心3.2 GHz 的 PowerPC處理器,
編程式的速度我覺得還可以,只用這顆 CPU編過 Linux的核心而已。
→ ouyang:至於 SPE記得也有看過專文 在AVC H.264解碼 122.116.66.45 09/25 23:02
→ ouyang:的性能上相當不錯 1~2顆就可以做到BD等級 122.116.66.45 09/25 23:02
如果能這樣當然最好,但 SPE跟一顆完整的 CPU相比缺了不少東西,之前有看到
一篇文章在抱怨 SPE的程式除錯非常困難。
→ ninjaxin:PS3上市前SONY還一直吹牛說運算多猛X 114.41.107.2 09/25 23:03
老王賣瓜咩,習慣就好。 PS Vita也是說 4核心的 ARM有多厲害,到時候就知道
真假了。
→ ouyang:的影像+音效解碼 122.116.66.45 09/25 23:04
→ ouyang:後來改版的 CELL2 就是兩顆加強型PPE+32SPE 122.116.66.45 09/25 23:04
→ ouyang:不過CELL原本的設計就是拿來當輔助處理器 122.116.66.45 09/25 23:05
→ ouyang:伺服器版都是 Opteronx2 +4CELL 122.116.66.45 09/25 23:05
→ ouyang:如果會寫SPE的程式 目前除了4K級的解碼不了 122.116.66.45 09/25 23:06
→ ouyang:應該不是什麼問題 4K解碼 當初SONY有演示 122.116.66.45 09/25 23:06
→ ouyang:好像是用兩台 PS3 or 四台 122.116.66.45 09/25 23:07
→ ouyang:目前 PS3 播放影片 Mp3(音效強化) SACD 122.116.66.45 09/25 23:09
→ ouyang:音效解碼 都是透過 SPE在處理應該是無誤 122.116.66.45 09/25 23:09
→ ouyang:基本上系統占用一顆 SPE 其他六顆可以自由 122.116.66.45 09/25 23:10
→ ouyang:運用 122.116.66.45 09/25 23:10
Showtime只用了 PPE而已,完全沒動到 SPE,但卻有使用到BE的硬解電路。
系統佔用的那顆就是目前破解陣營最想攻陷的堡壘,SONY把所有加解密相關的金
鑰資訊全部都擺在那裡面,因此被攻陷的話SONY肯定損失慘重。
如果 SPE能夠有所突破,那拿 PS3來當影片壓縮主機也許會是個不錯的選擇。
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