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CUDA-Permutation(Game-Simulation)

用CUDA模擬 Slot machine 的排列組合，並能夠模擬指定盤面的出現的機率。

Input

定義符號和轉盤上的版面及數量，以及中獎盤面的檔案路徑。

input.csv(暫定格式)

input.csv

Winning Set

用符號的索引值定義中獎的盤面

-1 代表任何相同的圖案

W1.txt

Output

輸出中獎的機率。

output.csv(暫定格式)

output.csv

Debug紀錄

多個Thread同時使用同個Memory進行累加，導致累加錯誤。

參考https://www.ptt.cc/bbs/C_and_CPP/M.1271911923.A.2B8.html

  1. 使用atomicAdd(&x, 1)代替x += 1。(效率較低，但比較好改)
  2. 每個Thread使用的memory切乾淨，最後再用CPU算Sum。(效率較高)

比較效率(左:atomicAdd, 右: Thread切乾淨後Sum)

compare01

compare02

compare03

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