4 Parallelism
Keywords: user_guide

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4 Parallelism

The `PWneb` code is interfaced to `PWscf`, which is used as computational engine for total energies and forces. It can therefore take advantage from the two parallelization paradigms currently implemented in QUANTUM ESPRESSO, namely Message Passing Interface (MPI) and OpenMP threads, and exploit all `PWscf`-specific parallelization options. For a detailed information about parallelization in QUANTUM ESPRESSO, please refer to the general documentation.

As `PWneb` makes several independent evaluations of energy and forces at each step of the path optimization (one for each point in the configurational space, called ``image'', consituting the path) it is possible to distribute them among processors using an additional level of parallelization (see later).

Subsections

- 4.1 Running on parallel machines
- 4.2 Parallelization levels