On Mon, 2 May 2011 15:00:09 -0400, Gaston Fiore <gaston.fi...@gmail.com> wrote: > Hello, > > When I run the code attached (very short), and I get error below: > > -bash-3.2$ python test.py > Traceback (most recent call last): > File "test.py", line 49, in <module> > (height + block_size - 1) // block_size)) > File > "/home/gafiore/local/lib/python2.7/site-packages/pycuda-2011.1-py2.7-linux-x86_64.egg/pycuda/driver.py", > line 172, in function_call > handler.pre_call(stream) > File > "/home/gafiore/local/lib/python2.7/site-packages/pycuda-2011.1-py2.7-linux-x86_64.egg/pycuda/driver.py", > line 70, in pre_call > memcpy_htod(self.get_device_alloc(), self.array) > TypeError: expected a single-segment buffer object > -bash-3.2$ python test.py > > However, if I comment out lines 7-9 and uncomment lines 9-10, which > should result in identical NumPy arrays lat and lon, the code runs > without any errors. How could this be possible? Aren't the arrays lat > and lon equivalent in both cases?
Equivalent in the '==' sense, yes. But their memory layout is not contiguous, which is a prerequisite for being able to copy them to the GPU. (see numpy docs for an explanation of memory layouts and contiguity) A simple numpy_array.copy() will fix that. Andreas
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