680 B
680 B
Example 01
This example compares the timings of adding vectors on the CPU versus adding vectors on the GPU, the latter of which has different implementations.
About
The code runs the following implementations of adding large vectors (131072 elements; 8 * 32 * 512). The vectors are added together 10000 times.
- CPU
- GPU, where 1024 threads are spawned and each thread thus gets 128 elements to calculate; there are two implementations of this:
- (Version 1) each thread gets 128 sequential elements (thread 0 gets 0-127, 1 gets 128-255, ...)
- (Version 2) each thread gets 128 elements, but coalescing happens (thread 0 gets 0,128,256..., thread 1 gets 1,129,257...)