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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