What surprises me is to get seg faults in the theano function, while I would have expected them to occur during evaluation on values...
On Wednesday, July 12, 2017 at 10:05:30 AM UTC+2, Christopher Bourez wrote: > > A second thing that is not clear to me in the documentation of Theano is > how you specify a C implementation and GPU implementation of the same own > op. Thank you > > On Wednesday, July 12, 2017 at 9:58:34 AM UTC+2, Christopher Bourez wrote: >> >> I've also tried to create an example with theano.gpuarray.nnet.GpuSoftmax >> but after compilation it got replaced another implementation*GpuDnnSoftmax >> : * >> >> >> *Elemwise{mul,no_inplace} [id A] '' |HostFromGpu(gpuarray) [id B] '' >> | |GpuSoftmax [id C] '' | |GpuFromHost<dev0> [id D] '' | |x >> [id E] |InplaceDimShuffle{x,x} [id F] '' |TensorConstant{2} [id >> G]CompilingHostFromGpu(gpuarray) [id A] '' 5 |GpuElemwise{Mul}[(0, >> 1)]<gpuarray> [id B] '' 4 |GpuArrayConstant{[[ 2.]]} [id C] >> |InplaceGpuDimShuffle{0,1} [id D] '' 3 >> |GpuDnnSoftmax{mode='channel', algo='accurate'} [id E] '' 2 >> |GpuContiguous [id F] '' 1 |InplaceGpuDimShuffle{0,1,x,x} [id G] >> '' 0 |<GpuArrayType<dev0>(float32, (False, False))> [id H]*I'm >> looking of a good example with a GPU Kernel. >> >> On Wednesday, July 12, 2017 at 9:56:08 AM UTC+2, Christopher Bourez wrote: >>> >>> I don't know what you mean by "not modifying" the source for GpuEye: >>> - In this example, I'm importing a not modifyed GpuEye op from Theano >>> basic ops >>> - If I'm using theano.tensor.eye, then it does not use the GpuEye >>> >>> Also, are you sure this test >>> >>> https://github.com/Theano/Theano/blob/2625464534147fd70da60a3a3ddcb63ed8e5a416/theano/gpuarray/tests/test_basic_ops.py#L401 >>> works well ? >>> >>> On Wednesday, July 12, 2017 at 2:48:44 AM UTC+2, Pascal Lamblin wrote: >>>> >>>> Does it work if you do not modify the source for GpuEye at all? >>>> If it does, then maybe sharing your new source would get you more help. >>>> >>>> On Tuesday, July 11, 2017 at 12:12:03 PM UTC-4, Christopher Bourez >>>> wrote: >>>>> >>>>> Hi, >>>>> >>>>> I'm trying to implement a simple GPU op but it always gives me a >>>>> Segmentation fault during compilation, without other message. >>>>> >>>>> For example : >>>>> import theano >>>>> from theano.gpuarray.basic_ops import GpuEye >>>>> >>>>> x = theano.tensor.iscalar('x') >>>>> y = theano.tensor.iscalar('y') >>>>> z = GpuEye(dtype='float32', context_name=None)(x,y, >>>>> theano.tensor.constant(0)) >>>>> >>>>> theano.printing.debugprint(z) >>>>> print("Compiling") >>>>> f = theano.function( [x,y], z) >>>>> theano.printing.debugprint(f) >>>>> print("Results") >>>>> print(f(3, 3)) >>>>> >>>>> I've also tried with the softmax gpu function. Is there something I'm >>>>> missing ? >>>>> >>>>> I copied the file, created a complete new op, and the segmentation >>>>> fault appears when I'm defining a Kernel in gpu_kernels() method of the >>>>> op. >>>>> >>>>> Thank you a lot for your help >>>>> >>>> -- --- 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 theano-users+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.