BLOCK_SIZE对CUDA矩阵乘法性能影响测试
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    Matrix       Block       Time(ms)       FLOPS(G)
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       256x256           4x4          0.116         289.26
       256x256           8x8          0.040         838.19
       256x256          16x16          0.029        1170.29
       256x256          32x32          0.026        1292.94
----------------------------------------
       512x512           4x4          0.831         323.04
       512x512           8x8          0.265        1014.10
       512x512          16x16          0.189        1423.49
       512x512          32x32          0.178        1506.57
----------------------------------------
      1024x1024           4x4          6.539         328.40
      1024x1024           8x8          2.022        1061.88
      1024x1024          16x16          1.397        1536.94
      1024x1024          32x32          1.364        1574.44
----------------------------------------
      2048x2048           4x4         54.023         318.01
      2048x2048           8x8         16.080        1068.38
      2048x2048          16x16         11.454        1499.84
      2048x2048          32x32         11.019        1559.16
----------------------------------------