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Open Computing Language

Open Computing Language. (OpenCL). Domagoj Stanković Voditelj: Prof. dr. sc. Domagoj Jakobović. Prošlost. Ubrzanje izvođenja => brži procesor 2004. Intelov procesor 4 GHz – gornja granica Višejezgreni procesori – paralelni programi Različite platforme – različiti programi. OpenCL.

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Open Computing Language

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  1. Open Computing Language (OpenCL) Domagoj Stanković Voditelj: Prof. dr. sc. Domagoj Jakobović

  2. Prošlost • Ubrzanje izvođenja => brži procesor • 2004. Intelov procesor 4 GHz – gornja granica • Višejezgreni procesori – paralelni programi • Različite platforme – različiti programi

  3. OpenCL • Okvir za pisanje programa koji se izvršavaju paralelno na heterogenim platformama - CPU, GPU, DSP • CPU (central processing unit) – procesor opće namjene, mali broj jezgri • GPU (graphics processing unit) – procesor za grafičko računanje, veliki broj jezgri • DSP (digital signal processor) – procesor za obradu digitalnog signala

  4. OpenCL • Prenosivost • Khronos Group – standardizacija

  5. Host & Device

  6. Osnovni tok OpenCL programa

  7. OpenCL program __kernelvoid vector_add(__global int *A, __global int *B, __global int *C) { // Nađi indeks trenutnog elementa int i = get_global_id(0); // Obavi operaciju C[i] = A[i] + B[i]; }

  8. Usporedba brzina izvođenja

  9. Množenje matrica

  10. Zbrajanje vektora

  11. Hvala na pažnji!

  12. Model memorije • Globalna memorija • Konstantna memorija • Lokalna memorija • Privatna memorija

  13. Modeli paralelnih programa • Programski model paralelnih podataka (data parallel) • Programski model paralelnih zadataka (task parallel)

  14. Brzine prijenosa

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