Benchmarks

Streams

Used as a baseline for memory bound applications. Assume we are using 48 core machine and want each core to process 10,000,000 elements of type double. To build:

git clone https://github.com/jeffhammond/STREAM.git
cd STREAM
gcc -fopenmp -O3 -mcmodel=medium -DSTREAM_TYPE=double -DSTREAM_ARRAY_SIZE=480000000 -DNTIMES=100 stream.c -o stream_cpu_openmp

When running:

OMP_NUM_THREADS=48 ./stream_cpu_openmp

To verify that you are using 48 cores, run top in another window. The stream process should show 4800 in the %CPU column.

Google Benchmarks

Micro-benchmark framework for measuring primitive operations. See gbench README.