嗯. 從 Intel 提供的這個 PDF 檔案來看.
目前還沒辦法真正執行. 用的是模擬的方式.
首先將真實遊戲執行的資料擷取下來 (修改 DirectX9, 攔截送往 3D 顯示卡的資訊)
然後把這些資料餵給 模擬的 Larrabee (當然要先經過重新編譯成CPU用的機械碼)
看看一個單元能夠處理的量有多少. (一個單元就是一個 Larrabee 單元在 1GHZ 跑的效能)
.......
引用:
We captured the frames by intercepting the DirectX 9 command
stream being sent to a conventional graphics card while the game
was played at a normal speed, along with the contents of textures
and surfaces at the start of the frame. We tested them through a
functional model to ensure the algorithms were correct and that
the right images were produced. Next, we estimated the cost of
each section of code in the functional model, being aggressively
pessimistic, and built a rough profile of each frame. We wrote
assembly code for the highest-cost sections, ran it through cycleaccurate
simulators, fed the clock cycle results back into the
functional model, and re-ran the traces. This iterative cycle of
refinement was repeated until 90% of the clock cycles executed
during a frame had been run through the simulators, giving the
overall profiles a high degree of confidence. Texture unit
throughput, cache performance and memory bandwidth
limitations were all included in the various simulations.
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裡面用的解析度是 1600x1200, AA/AF 資訊缺乏, 就假設沒有吧.
GOW 的 FPS 估算起來約 (60* 32*2 /17 ) 225FPS
FEAR 的平均 FPS 估計起來約 (60*32*2/13) 295FPS
Half Life 2 的平均 FPS (60*32*2/7) 584 FPS
對照組: GTX 280
Half Life 2 E2 約 213 FPS 上下.
所以說這代的單卡王者跟兩年後推出的顯示卡來說, 大約是 2.74X
http://tech.sina.com.cn/h/2008-06-17/09302262952.shtml
FEAR : 142 FPS (開啟 4AA) =142 FPS 大約是
2.1X
http://tech.sina.com.cn/h/2008-06-17/09302262955.shtml
(抱歉找不到 NoAA)
至於 GOW 的話... 暫時還找不到洽當得比對.
感謝 HigH 提供的資訊.