Hello, I'm trying to get an IPC device pointer to the GPU memory allocated to a shared variable with the hope that I can transfer data between GPUs without transferring back to host memory.
Currently I'm using something like: | x_ga = theano.misc.pycuda_utils.to_gpuarray(x.container.value) | x_ipc = pycuda.driver.mem_get_ipc_handle(x_ga.ptr) where 'x' is a theano.shared() instance. My problem is that if I run this before running my theano function (which updates x) it has no issues, however If I run it after it complains with "cuIpcGetMemHandle failed: invalid argument". So I'm guessing that the pointer obtained with "x_ga.ptr" is no longer a valid device pointer... or maybe pygpu is losing the cuda context. Is it possible that the shared variable has been moved off the GPU? -- --- You received this message because you are subscribed to the Google Groups "theano-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
