time-to-botec/C
2023-06-03 10:50:06 -06:00
..
C-01-simple reorganize C code 2023-06-02 16:00:49 -06:00
C-02-better-algorithm-one-thread reorganize C code 2023-06-02 16:00:49 -06:00
out xorshift minor tweaks 2023-06-03 10:02:01 -06:00
xorshift-scratchpad compare using a struct instead of a pointer, reorg 2023-06-03 10:50:06 -06:00
makefile tweak: add static compilation option 2023-06-03 03:47:58 -06:00
perf.txt finish xorshift updating. 2023-06-03 04:21:59 -06:00
README.md compare using a struct instead of a pointer, reorg 2023-06-03 10:50:06 -06:00
samples.c compare using a struct instead of a pointer, reorg 2023-06-03 10:50:06 -06:00

Time to BOTEC in C

This repository contains a few implementations of a simple botec (back-of-the-envelope) calculation in C:

  • In the folder C-01-simple/, you can see a simple implementation, which passes large arrays around
  • In the folder C-02-better-algorithm-one-thread/ you can see a better implementations, that passes around pointers to functions, which makes the implementation more efficient
  • The top level samples.c uses the algorithm improvements in C-02..., and also implements multithreading using OpenMP

To do

  • Add Windows/Powershell time-measuring commands
  • Add CUDA?
  • Added results of perf. rand_r seems like a big chunk of it, but I'm hesitant to use lower-quality random numbers
    • used xorshift instead
    • [-] Use xorshift with a struct instead of a pointer? idk, could be faster for some reason? => Tested, it takes the same time.
  • Update repository with correct timing
  • Use better profiling approach to capture timing with 1M samples.
  • See if program can be reworded so as to use multithreading effectively, e.g., so that you see speed gains proportional to the number of threads used