cusp library cuda parameters

hi all,

could anyone tell me how to set parameters like block size, warp size…etc in cusp library? For example I want to set block size to 512 for coo matrix format. It’s transparent to the user. I don’t see what they are set to.

Second issue: I have wrote some piece of code to run some tests with coo format on most widely used matrices. (ex. cant_FEM_Cantilever.mtx, dense2_Dense.mtx, pwtk_Wind_Tunnel, mtxqcd5_4_QCD.mtx…etc)

only on matrices mc2depi_Epidemiology.mtx, rail4284_LP.mtx and webbase_1M_Webbase.mtx I get this error:

terminate called after throwing an instance of ‘thrust::system::system_error’
what(): unspecified launch failure

This failure leads me to nothing… My gut feeling tells me that it’s somehow related to block size…etc. Any ideas?