Profiling results on CPU

[fredRos]

Profiling results on CPU

[fredRos]

A useful list of tricks to reduce OS related noise https://github.com/JuliaCI/BenchmarkTools.jl/blob/master/doc/linuxtips.md for accurate timing

[fredRos]

The timing output by amplifier seems unreliable. With 1 thread, code in libfftw3 takes 1.7 s, with 8 threads, it's 0.001 s. Doesn't make sense! To create a bar chart for the paper, I should output the time elapsed in individual operations both for a GPU and a CPU. ON the cpu, I would use omp_get_wtime(). On the GPU, use the cuda events already in the code but with macros to avoid copying code as much as possible or this C++ struct https://github.com/aramadia/udacity-cs344/blob/master/Unit2%20Code%20Snippets/gputimer.h

[fredRos]

We now have fine-grained timing output enable by cmake -DGALARIO_TIMING=1 . Timing of memory allocations and transfer still highly variable for GPU