The binary _driver.pyd file is a windows dll and it is linked to dlls
with specific versions which come from the cuda toolkit. A change of
CUDA versions means you (or someone) needs to recompile it before it
will work for CUDA 4.1.
The problem is that pycuda is written in C++ and has to be recompiled
from the C++ source code to get binaries to match your new CUDA dlls.
Patching is only needed if there is some problem when you try to build
it or run the unit tests.
Best
Jon
On 02/02/2012 12:39, Igor wrote:
Yes, the binary is from Christoph Gohlke. If nothing changed in my
set-up except CUDA from 4 to 4.1 how do I patch pyCUDA to find the new
CUDA driver, as I guess that's the problem. I'm not quite sure why we
talk about Visual Studio... I have it installed, of course, but I
don't understand why it's still needed.
On Thu, Feb 2, 2012 at 10:46 PM, Jonathan WRIGHT<[email protected]> wrote:
Where do you get your binaries from? The ones from Christoph Gohlke require
CUDA 4.0, but you have 4.1. I never got a reply on this message about
building on windows x64 when I had 3.2:
http://thread.gmane.org/gmane.comp.python.cuda/2516
If that procedure also works for you then maybe we should update the wiki?
You should just need the 2008 express edition compiler and not the SDK for
64-bit. I'm nervous about the "tss" issue which I did not understand.
Cheers
Jon
On 02/02/2012 10:05, Igor wrote:
I just upgraded the driver, toolkit and SDK to CUDA 4.1 (uninstalling
CUDA 4.0 toolkit and SDK first), PyCUDA stopped working. Upgraded also
PyCUDA by installing pycuda-2011.2.2.win32-py2.7.exe, same error
message as below, right at the first line of demo.py "import
pycuda.driver as cuda" or "from pycuda._driver import *". Restarted,
no change. I must have forgotten some important step that I should
re-do to get my set-up working again?
Message File Name Line Position
Traceback
<module> W:\Programming\CUDA\PyCUDA\pycuda-2011.2.2\examples\demo.py
3
<module> C:\Python27\lib\site-packages\pycuda\driver.py 2
exceptions.ImportError: DLL load failed: The specified module could
not be found.
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