OpenMP/Benchmarks

Neighborhood analysis

Performance using OpenMP and different compilers:

source|svn/sandbox/soeren/benchmarks/neighborhood_openmp/

Best to run it 4 times for each case, discard the first and average the next 3.

Example usage:

 unset OMP_NUM_THREADS
 time ./neighbor 5000 5000 23
 
 export OMP_NUM_THREADS=1
 time ./neighbor 5000 5000 23
 
 ...
 
 export OMP_NUM_THREADS=6
 time ./neighbor 5000 5000 23

results table:

CPU	Number of cores	OMP NUM THREADS	Time "real"	Time "user"	Time "sys"	Compiler	Compiler version	Compiler flags	OS	System RAM
Intel i7 3770	4 real (8 w/ hyperthread)	unset (all)		example entry		gcc	4.4.8	-O3	Ubuntu 12.04	8 gb