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Multiplicação de Vetor por Matriz em CUDA



     Disciplina de Programação Paralela
Universidade Federal de São Carlos - UFSCar


            Erik Aceiro Antonio

          Prof. Dr. Hermes Senger

                São Carlos
                  2010
Atualmente AMD e NVIDIA possuem massiva, unidades programáveis em seus núcleos – A NVIDIA
                GeForce 8800 GTX com 16 streaming multiprocessors de 8 thread (stream) processadores cada.
Um par de stream de multiprocessadores é mostrado abaixo. Cada um contém instruções compartilhadas, cache de dados, ULA, 16
                           kB de memória compartilhada, 8 processadores e duas unidades especiais.
N     Tempo CPU   Tempo GPU (ms)        Tempo GPU (s) e (mim)
 32     0.005000              0.249000                   0.00025
 64     0.015000              1.456000                   0.00146
128     0.053000             20.622000                   0.02062
256     0.174000            144.916000                   0.14492
512     0.634000           1009.034973                > 1 segundo
1024    2.418000           7222.379883               > 7 segundos
2048    9.549000          64847.441406                    > 1 mim
4096   37.462002         814199.375000                  > 13 mim
N          GPU          CPU              Speedup

      32     0.041000         0.003000               0.07

      64     0.042000         0.010000               0.24

     128     0.042000         0.037000               0.88

     256     0.046000         0.151000               3.28
     512     0.052000         0.595000              11.44

    1024     0.058000         2.365000              40.78

    2048     0.058000         9.501000             163.81

    4096     0.066000     37.444000                567.33

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CUDA Comparative between

  • 1. Multiplicação de Vetor por Matriz em CUDA Disciplina de Programação Paralela Universidade Federal de São Carlos - UFSCar Erik Aceiro Antonio Prof. Dr. Hermes Senger São Carlos 2010
  • 2. Atualmente AMD e NVIDIA possuem massiva, unidades programáveis em seus núcleos – A NVIDIA GeForce 8800 GTX com 16 streaming multiprocessors de 8 thread (stream) processadores cada. Um par de stream de multiprocessadores é mostrado abaixo. Cada um contém instruções compartilhadas, cache de dados, ULA, 16 kB de memória compartilhada, 8 processadores e duas unidades especiais.
  • 3.
  • 4. N Tempo CPU Tempo GPU (ms) Tempo GPU (s) e (mim) 32 0.005000 0.249000 0.00025 64 0.015000 1.456000 0.00146 128 0.053000 20.622000 0.02062 256 0.174000 144.916000 0.14492 512 0.634000 1009.034973 > 1 segundo 1024 2.418000 7222.379883 > 7 segundos 2048 9.549000 64847.441406 > 1 mim 4096 37.462002 814199.375000 > 13 mim
  • 5.
  • 6.
  • 7.
  • 8. N GPU CPU Speedup 32 0.041000 0.003000 0.07 64 0.042000 0.010000 0.24 128 0.042000 0.037000 0.88 256 0.046000 0.151000 3.28 512 0.052000 0.595000 11.44 1024 0.058000 2.365000 40.78 2048 0.058000 9.501000 163.81 4096 0.066000 37.444000 567.33