[PyCUDA] test_gpuarray.py errors

[Imran Haque]

Hi Chethan,

Devices of compute capability 1.3 do support double. 1.2 and lower do not.

Imran

Chethan Pandarinath wrote:
> Hi Bryan, thanks for the quick reply. I understand the issue now.
> 
> So it looks like any devices of compute capability 1.x would not have 
> support for double precision (from section 5.1.1.1 of the NVIDIA CUDA 
> Programming Guide).
> 
> Does this seem like a reasonable way of checking for double precision 
> support in the test script? e.g., :
> 
> import pycuda.driver as cuda
> dev=cuda.Device(0);
> if dev.compute_capability() < (2,0):
>    no double precision support, don't run those tests...
> 
> 
> 
> 
> On Fri, Apr 23, 2010 at 9:07 PM, Bryan Catanzaro 
> <bryan.catanzaro at gmail.com <mailto:bryan.catanzaro at gmail.com>> wrote:
> 
>     The GPU in your MacBook doesn't support double precision, which is
>     why these tests are failing. 
>     You're of course welcome to change the tests so that they check for
>     double precision support before running them - that would probably
>     help out others who end up in this situation.
> 
>     - bryan
> 
>     On Apr 23, 2010, at 5:41 PM, Chethan Pandarinath
>     <chethan.pandarinath at gmail.com
>     <mailto:chethan.pandarinath at gmail.com>> wrote:
> 
>>     Hi everybody,
>>
>>     I've been working on installing PyCUDA on my MacBook (Snow
>>     Leopard).  I think I'm close to having it working, it's been quite
>>     a long road: getting compatible versions of boost, setuptools,
>>     pytools... anyway, I think I'm past all that.
>>
>>     I can now successfully run test_math.py and test_driver.py with no
>>     errors.
>>
>>     I am having trouble, however, with test_gpuarray.py
>>
>>     I'm attaching the output from running the test script, with the
>>     standard error appended as well.
>>        $ arch -i386 python test_gpuarray.py >test_gpuarray_output.txt
>>
>>
>>     There are a couple types of errors that I can see here:
>>
>>     E               AssertionError: (array(-4.2129004090721698e+36),
>>     -1.2509687918788644e+303, <type 'numpy.float64'>, 'min')
>>     test_gpuarray.py:328: AssertionError
>>
>>     E           assert array(-6.0786212321272663e+144) ==
>>     -2.6357594520767543e+301
>>     test_gpuarray.py:357: AssertionError
>>
>>     E           LaunchError: cuCtxPopCurrent failed: launch failed
>>     /Library/Python/2.6/site-packages/pycuda/tools.py:504: LaunchError
>>
>>     E           RuntimeError: make_default_context() wasn't able to
>>     create a context on any of the 1 detected devices
>>     /Library/Python/2.6/site-packages/pycuda/tools.py:216: RuntimeError
>>
>>
>>     To tell you the truth I don't know how to begin debugging this. If
>>     anyone can point me in the right direction, I'd greatly appreciate
>>     it. Willing to provide any info that would help...
>>
>>     I'm running this on a MacBook, Snow Leopard (10.6.3), with an
>>     NVIDIA GeForce 9400M. Using Python 2.6.1.
>>
>>     Thanks.
>>     Chethan
>>
>>
>>
>>     -- 
>>     Chethan Pandarinath
>>     <mailto:chethan.pandarinath at gmail.com>chethan.pandarinath at gmail.com
>>     <mailto:chethan.pandarinath at gmail.com>
>>     <test_gpuarray_output.txt>
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> 
> 
> 
> 
> -- 
> Chethan Pandarinath
> chethan.pandarinath at gmail.com <mailto:chethan.pandarinath at gmail.com>
> 
> 
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