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PODevice Fission Intel CPU
 

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    <p>I'm trying to write an opencl program using the device fission extension.</p> <p>I'm using an Intel i3 M350, but I'm not able to create sub devices:</p> <pre><code>#define USE_CL_DEVICE_FISSION 1 #include &lt;iostream&gt; #include "CL/cl.hpp" using namespace std; int main(int argc, char* argv[]) { cl::Context context; std::vector&lt;cl::Platform&gt; platforms; cl::Platform::get(&amp;platforms); cl_context_properties properties[] = { CL_CONTEXT_PLATFORM, (cl_context_properties)(platforms[1])(), 0 }; context = cl::Context(CL_DEVICE_TYPE_CPU, properties); std::vector&lt;cl::Device&gt; devices = context.getInfo&lt;CL_CONTEXT_DEVICES&gt;(); cout &lt;&lt; "Platform:\t" &lt;&lt; platforms[1].getInfo&lt;CL_PLATFORM_NAME&gt;() &lt;&lt; endl; cout &lt;&lt; "Version:\t" &lt;&lt; platforms[1].getInfo&lt;CL_PLATFORM_VERSION&gt;() &lt;&lt; endl; cout &lt;&lt; "Device:\t\t" &lt;&lt; devices[0].getInfo&lt;CL_DEVICE_NAME&gt;() &lt;&lt; endl; cout &lt;&lt; "Profile:\t" &lt;&lt; devices[0].getInfo&lt;CL_DEVICE_PROFILE&gt;() &lt;&lt; endl; cout &lt;&lt; "Driver:\t\t" &lt;&lt; devices[0].getInfo&lt;CL_DRIVER_VERSION&gt;() &lt;&lt; endl; cout &lt;&lt; "ComputeUnits:\t" &lt;&lt; devices[0].getInfo&lt;CL_DEVICE_MAX_COMPUTE_UNITS &gt;() &lt;&lt; endl; if (devices[0].getInfo&lt;CL_DEVICE_EXTENSIONS&gt;().find("cl_ext_device_fission") == std::string::npos) { cout &lt;&lt; "No device fission support!" &lt;&lt; endl; exit(-1); } else { cout &lt;&lt; "Device Fission: Available" &lt;&lt; endl; } const cl_device_partition_property_ext subDeviceProperties[] = { CL_DEVICE_PARTITION_EQUALLY_EXT, 1, CL_PROPERTIES_LIST_END_EXT, 0 }; std::vector&lt;cl::Device&gt; subDevices; int err = devices[0].createSubDevices(subDeviceProperties, &amp;subDevices); if (err != CL_SUCCESS) { cout &lt;&lt; "\nError: " &lt;&lt; err &lt;&lt; endl; } } </code></pre> <p>The output is:</p> <pre><code>Platform: Intel(R) OpenCL Version: OpenCL 1.1 LINUX Device: Intel(R) Core(TM) i3 CPU M 350 @ 2.27GHz Profile: FULL_PROFILE Driver: 1.1 ComputeUnits: 4 Device Fission: Available Error: -1057 </code></pre> <p>This error code stands for:</p> <blockquote> <p>CL_DEVICE_PARTITION_FAILED_EXT -1057</p> <pre><code>Returned by clCreateSubDevicesEXT when the total number of compute units requested exceeds CL_DEVICE_MAX_COMPUTE_UNITS, or the number of compute units for any one sub-device is less than 1. </code></pre> </blockquote> <p>Any ideas?</p>
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