For reference - it works fine on my machine. Using my machine (WinXP
32 bit, CUDA 2.3, pyCUDA 0.94 latest master, 9800GT) I get:
In [19]: %run dangoodman.py
kernel.cu
tmpxft_00000ebc_00000000-3_kernel.cudafe1.gpu
tmpxft_00000ebc_00000000-8_kernel.cudafe2.gpu
ptxas C:\DOCUME~1\parc\LOCALS~1\Temp/tmpxft_00000ebc_00000000-4_kernel.ptx,
line 66; warning : Double is not supported.
Demoting to float
[ 5.26354425e-315 0.00000000e+000 0.00000000e+000 0.00000000e+000
0.00000000e+000 0.00000000e+000 0.00000000e+000 0.00000000e+000
0.00000000e+000 0.00000000e+000]
If I replace exp() with sin() then that works too (but the output in
x[0] is 0 as sin(0) is 0).
Noting Fabrizio's point the compiler is warning about Double in the
above output.
i.
On 3 March 2010 16:59, Dan Goodman <dg.pyc...@thesamovar.net> wrote:
> Hi all,
>
> I have a really weird bug that I can't explain at all. The following code
> crashes:
>
> from numpy import zeros
> from pycuda import autoinit
> from pycuda import gpuarray
> from pycuda import compiler
> x = gpuarray.to_gpu(zeros(10))
> src = '''
> __global__ void f(double *x)
> {
> x[0] = exp(0.0);
> }
> '''
> gpu_mod = compiler.SourceModule(src)
> gpu_func = gpu_mod.get_function("f")
> gpu_func(x, block=(1,1,1), grid=(1,1))
> print x.get()
>
> Now if I replace exp(0.0) with just 0.0 it works fine. It doesn't crash with
> sin(0.0) nor with expf. The output I get when I run it is:
>
> [ 0. 0. 0. 0. 0. 0. 0. 0. 0. 0.]
> PyCUDA WARNING: a clean-up operation failed (dead context maybe?)
> cuMemFree failed: unknown
> PyCUDA WARNING: a clean-up operation failed (dead context maybe?)
> cuModuleUnload failed: unknown
>
> I'm running PyCUDA 0.94. Not sure how to tell you which version exactly, but
> the top line of the git log is:
>
> commit 9528d732e1179aea0d0eacd9a3e12423a1545728
> Merge: 955c1e5 9f26615
> Author: Andreas Kloeckner <inf...@tiker.net>
> Date: Sun Jan 31 12:23:50 2010 -0500
> Merge branch 'master' of t:src/pycuda
>
> I'm running the CUDA 3.0 beta on a GTX 295.
>
> Any ideas?
>
> Dan
>
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>
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