19 lines
748 B
Markdown
19 lines
748 B
Markdown
# Example 01
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This example compares the timings of adding vectors on the CPU versus adding vectors on the GPU, the latter of which has different implementations.
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## Compiling
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```
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clang++ -std=c++0x -framework OpenCL version01.cpp -o version01.out
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```
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To ignore deprecation warnings, add the flag `-Wno-deprecated-declarations`.
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## About
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The code runs the following implementations of adding large vectors (131072 elements; 8 * 32 * 512). The vectors are added together 1000 times.
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- CPU
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- GPU, where 32 * 512 threads are spawned and each thread thus gets 8 elements to calculate
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- GPU, same as before but each iteration involves writing the buffers (to demonstrate overhead)
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- GPU, where 8 * 32 * 512 threads are spawned - one for each element
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