PyOpenCL 0.90: Python wrapper for OpenCL

PyOpenCL: Python wrapper for OpenCL



PyOpenCL is a Python wrapper for OpenCL. You can download PyOpenCL package HERE.

As soon as possible (OpenCL drivers…), I’ll try to test PyOpenCL with GeeXLab!

The author of PyOpenCL has also coded PyCUDA, a Python wrapper for NVIDIA CUDA or MeshPy (triangular and tetrahedral mesh generation for Python).

Here is the Python source code of the code sample that comes with the PyOpenCL package:

import pyopencl as cl
import numpy
import numpy.linalg as la

a = numpy.random.rand(50000).astype(numpy.float32)
b = numpy.random.rand(50000).astype(numpy.float32)

ctx = cl.create_context_from_type(cl.device_type.ALL)
queue = cl.CommandQueue(ctx)

mf = cl.mem_flags
a_buf = cl.create_host_buffer(
        ctx, mf.READ_ONLY | mf.COPY_HOST_PTR, a)
b_buf = cl.create_host_buffer(
        ctx, mf.READ_ONLY | mf.COPY_HOST_PTR, b)
dest_buf = cl.create_buffer(ctx, mf.WRITE_ONLY, b.nbytes)

prg = cl.create_program_with_source(ctx, """
    __kernel void sum(__global const float *a,
    __global const float *b, __global float *c)
    {
      int gid = get_global_id(0);
      c[gid] = a[gid] + b[gid];
    }
    """).build()

prg.sum(queue, a.shape, a_buf, b_buf, dest_buf)

a_plus_b = numpy.empty_like(a)
cl.enqueue_read_buffer(queue, dest_buf, a_plus_b).wait()

print la.norm(a_plus_b - (a+b)), la.norm(a_plus_b)

OpenCL at a glance:
OpenCL (Open Computing Language) is the first standard for general-purpose parallel programming of heterogeneous systems. OpenCL provides a uniform programming environment for software developers to write efficient, portable code for high-performance compute servers, desktop computer systems and handheld devices using a diverse mix of multi-core CPUs, GPUs, Cell-type architectures and other parallel processors such as DSPs.

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