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c++ Programming Glossary: omp_get_wtimeLooking for benchmarking code snippet (c++) http://stackoverflow.com/questions/483164/looking-for-benchmarking-code-snippet-c #include omp.h Starting the time measurement double start omp_get_wtime Computations to be measured ... Measuring the elapsed time double..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle double sum double malloc tds sizeof double double start omp_get_wtime #pragma omp parallel num_threads tds double ret test_dp_mac_SSE.. 1.1 2.1 iterations sum omp_get_thread_num ret double secs omp_get_wtime start uint64 ops 48 1000 iterations tds 2 cout Seconds secs.. double sum double malloc tds sizeof double double start omp_get_wtime #pragma omp parallel num_threads tds double ret test_dp_mac_AVX..
Why does changing 0.1f to 0 slow down performance by 10x? http://stackoverflow.com/questions/9314534/why-does-changing-0-1f-to-0-slow-down-performance-by-10x Here's the test code compiled on x64 int main double start omp_get_wtime const float x 16 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1.. if j 10000 cout y i if j 10000 cout endl double end omp_get_wtime cout end start endl system pause return 0 Output #define FLOATING..
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