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.. role:: ref(emphasis)
.. _futhark-pyopencl(1):
================
futhark-pyopencl
================
SYNOPSIS
========
futhark pyopencl [options...] infile
DESCRIPTION
===========
``futhark pyopencl`` translates a Futhark program to Python code
invoking OpenCL kernels, which depends on Numpy and PyOpenCL. By
default, the program uses the first device of the first OpenCL
platform - this can be changed by passing ``-p`` and ``-d`` options to
the generated program (not to ``futhark pyopencl`` itself).
The resulting program will otherwise behave exactly as one compiled
with ``futhark py``. While the sequential host-level code is pure
Python and just as slow as in ``futhark py``, parallel sections will
have been compiled to OpenCL, and runs just as fast as when using
``futhark opencl``. The kernel launch overhead is significantly
higher, however, so a good rule of thumb when using
``futhark pyopencl`` is to aim for having fewer but longer-lasting
parallel sections.
The generated code requires at least PyOpenCL version 2015.2.
OPTIONS
=======
Accepts the same options as :ref:`futhark-opencl(1)`.
SEE ALSO
========
:ref:`futhark-py(1)`, :ref:`futhark-opencl(1)`
|
