Hi Sumit, > Thanks for the update. Indeed, support for RM matrices would be helpful.
Added right here: https://github.com/viennacl/viennacl-dev/commit/7d29adf3970d5eaefef448742101c5a5960d773f > I did take a look at the page and tried all the methods there. My > architecture contains the following: > a.) AMD CPU > b.) AMD Devastator (with the CPU) > c.) AMD Hainan (discrete GPU card) > > No matter whatever I do, it ends up picking up b.) whereas I want to > pick up c.) > Can anyone share an example of how to go about doing this? Try the following at the begin of your program (i.e. before creating any ViennaCL-objects): viennacl::ocl::setup_context(0, viennacl::ocl::platform().devices()[2]); Best regards, Karli > ------------------------------------------------------------------------ > *From:* Karl Rupp <r...@iue.tuwien.ac.at> > *To:* Sumit Kumar <dost_4_e...@yahoo.com> > *Cc:* "viennacl-devel@lists.sourceforge.net" > <viennacl-devel@lists.sourceforge.net> > *Sent:* Sunday, July 26, 2015 11:37 PM > *Subject:* Re: [ViennaCL-devel] ViennaCL reductions > > Hi Sumit, > > > Thanks for the information. I have a second problem that has cropped up! > > a.) Apparently, I cannot copy a Row-Major Eigen matrix to a vcl matrix! > > It comes up with weird errors. I was using the default statements from > > the examples folder. The moment I changed it to Column Major eigen > > matrices the program compiled without any problem! > > Our interface currently supports Eigen::MatrixXf and Eigen::MatrixXd, > which seems like it does not cover the row-major case. I'll look into it > and extend the interface if needed. > > > > b.) I have an AMD APU (CPU + GPU) and a discrete GPU. How do I force > > ViennaCl to default to the discrete GPU and not the GPU from the APU? I > > tried a kludge: > > /get all available devices > > viennacl::ocl::platform pf; > > std::cout << "Platform info: " << pf.info() << std::endl; > > std::vector<viennacl::ocl::device> devices = > > pf.devices(CL_DEVICE_TYPE_GPU);// CL_DEVICE_TYPE_DEFAULT); > > std::cout << devices[1].name() << std::endl; > > std::cout << "Number of devices for custom context: " << > > devices.size() << std::endl; > > > > //set up context using all found devices: > > int gSize = (int)devices.size(); > > for (int i = gSize-1; i >=0 ; --i) > > { > > device_id_array.push_back(devices[i].id()); > > } > > > > std::cout << "Creating context..." << std::endl; > > cl_int err; > > cl_context my_context = clCreateContext(0, > > cl_uint(device_id_array.size()), &(device_id_array[0]), NULL, NULL, > &err); > > > > and this made it work. However, is there a cleaner way of doing this? > > This code snippet is from "custom-context.cpp". If i tried > > &(device_id_array[1]), the program crashes ! > > http://viennacl.sourceforge.net/doc/manual-multi-device.html > > > > > Best regards, > Karli > > ------------------------------------------------------------------------------ _______________________________________________ ViennaCL-devel mailing list ViennaCL-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/viennacl-devel
