/*
 * This file is part of the StarPU Handbook.
 * Copyright (C) 2009--2011  Universit@'e de Bordeaux
 * Copyright (C) 2010, 2011, 2012, 2013  CNRS
 * Copyright (C) 2011, 2012 INRIA
 * See the file version.doxy for copying conditions.
 */

/*! \page SOCLOpenclExtensions SOCL OpenCL Extensions

SOCL is an OpenCL implementation based on StarPU. It gives a unified access to
every available OpenCL device: applications can now share entities such as
Events, Contexts or Command Queues between several OpenCL implementations.

In addition, command queues that are created without specifying a device provide
automatic scheduling of the submitted commands on OpenCL devices contained in
the context to which the command queue is attached.

Note: this is still an area under development and subject to change.

When compiling StarPU, SOCL will be enabled if a valid OpenCL
implementation is found on your system. To be able to run the SOCL
test suite, the environment variable \ref SOCL_OCL_LIB_OPENCL needs to
be defined to the location of the file <c>libOpenCL.so</c> of the OCL
ICD implementation. You should for example add the following line in
your file <c>.bashrc</c>

\verbatim
export SOCL_OCL_LIB_OPENCL=/usr/lib/x86_64-linux-gnu/libOpenCL.so
\endverbatim

You can then run the test suite in the directory <c>socl/examples</c>.

\verbatim
$ make check
...
PASS: basic/basic
PASS: testmap/testmap
PASS: clinfo/clinfo
PASS: matmul/matmul
PASS: mansched/mansched
==================
All 5 tests passed
==================
\endverbatim

The environment variable \ref OCL_ICD_VENDORS has to point to the directory
where the socl.icd ICD file is installed. When compiling StarPU, the files
are in the directory <c>socl/vendors</c>. With an installed version of
StarPU, the files are installed in the directory
<c>$prefix/share/starpu/opencl/vendors</c>.

To run the tests by hand, you have to call for example,

\verbatim
$ LD_PRELOAD=$SOCL_OCL_LIB_OPENCL OCL_ICD_VENDORS=socl/vendors/ socl/examples/clinfo/clinfo
Number of platforms:	2
  Plaform Profile:	FULL_PROFILE
  Plaform Version:	OpenCL 1.1 CUDA 4.2.1
  Plaform Name:		NVIDIA CUDA
  Plaform Vendor:	NVIDIA Corporation
  Plaform Extensions:	cl_khr_byte_addressable_store cl_khr_icd cl_khr_gl_sharing cl_nv_compiler_options cl_nv_device_attribute_query cl_nv_pragma_unroll 

  Plaform Profile:	FULL_PROFILE
  Plaform Version:	OpenCL 1.0 SOCL Edition (0.1.0)
  Plaform Name:		SOCL Platform
  Plaform Vendor:	INRIA
  Plaform Extensions:	cl_khr_icd
....
$
\endverbatim

To enable the use of CPU cores via OpenCL, one can set the STARPU_OPENCL_ON_CPUS
environment variable to 1 and STARPU_NCPUS to 0 (to avoid using CPUs both via
the OpenCL driver and the normal CPU driver).

*/
