Posts Tagged with 'parallel'

Pick one: portability or efficiency. Neither is guaranteed when writing explicit parallel code

Parallel fundamentals, what constitutes an actual parallel program, and why some applications may or may not run faster on multi-core systems.

Adding more cores doesn't guarantee your programs will go faster: You need to tell the programs how to use the cores. We'll show you how to use OpenMP to speed up your code in just 30 minutes.

The last few "Extreme Linux" columns have focused on multiprocessing using OpenMP. While often used in scientific models for shared memory parallelism on symmetric multi-processor (SMP) machines, OpenMP can also be used in conjunction with the Message Passing Interface (MPI) to provide a second level of parallelism for improved performance on Linux clusters having SMP compute nodes. Programs that mix OpenMP and MPI are often referred to as hybrid codes.