Fixed maximum buffer allocation size limit in Intel CPU Runtime for OpenCL

Author: ProjectPhysX

src/opencl.hpp

@@ -110,7 +110,7 @@ struct Device_Info {
 		memory = (uint)(cl_device.getInfo<CL_DEVICE_GLOBAL_MEM_SIZE>()/1048576ull); // global memory in MB
 		global_cache = (uint)(cl_device.getInfo<CL_DEVICE_GLOBAL_MEM_CACHE_SIZE>()/1024ull); // global cache in KB
 		local_cache = (uint)(cl_device.getInfo<CL_DEVICE_LOCAL_MEM_SIZE>()/1024ull); // local cache in KB
-		max_global_buffer = (uint)(cl_device.getInfo<CL_DEVICE_MAX_MEM_ALLOC_SIZE>()/1048576ull); // maximum global buffer size in MB
+		max_global_buffer = (uint)(min(cl_device.getInfo<CL_DEVICE_MAX_MEM_ALLOC_SIZE>()/1048576ull, (ulong)memory)); // maximum global buffer size in MB
 		max_constant_buffer = (uint)(cl_device.getInfo<CL_DEVICE_MAX_CONSTANT_BUFFER_SIZE>()/1024ull); // maximum constant buffer size in KB
 		compute_units = (uint)cl_device.getInfo<CL_DEVICE_MAX_COMPUTE_UNITS>(); // compute units (CUs) can contain multiple cores depending on the microarchitecture
 		clock_frequency = (uint)cl_device.getInfo<CL_DEVICE_MAX_CLOCK_FREQUENCY>(); // in MHz
@@ -176,6 +176,11 @@ inline void print_device_info(const Device_Info& d) { // print OpenCL device inf
 	println("|----------------'------------------------------------------------------------|");
 }
 inline vector<Device_Info> get_devices(const bool print_info=true) { // returns a vector of all available OpenCL devices
+#if defined(_WIN32)
+	(void)_putenv((char*)"CL_CONFIG_CPU_FORCE_MAX_MEM_ALLOC_SIZE=17179869183GB"); // fix maximum buffer allocation size limit in Intel CPU Runtime for OpenCL, 2^34-1 is max non-overflowing value
+#elif defined(__linux__)
+	(void) putenv((char*)"CL_CONFIG_CPU_FORCE_MAX_MEM_ALLOC_SIZE=17179869183GB"); // fix maximum buffer allocation size limit in Intel CPU Runtime for OpenCL, 2^34-1 is max non-overflowing value
+#endif // Linux
 	vector<Device_Info> devices; // get all devices of all platforms
 	vector<cl::Platform> cl_platforms; // get all platforms (drivers)
 	cl::Platform::get(&cl_platforms);