Hi
I'm trying to split my kernel invocations into class methods. Basically,
I'd like to call set_args in one method and then enqueue_nd_range_kernel in
another. However, when I try this I receive a "clEnqueueNDRangeKernel
failed: invalid mem object" exception.
I've adapted the front page example into a short snippet that demonstrates
the problem. Can anyone see if there's something obvious I', missing. If
not, I'll file an issue on gitbub.
> import numpy as np
> import pyopencl as cl
> a_np = np.random.rand(50000).astype(np.float32)
> b_np = np.random.rand(50000).astype(np.float32)
> class Test(object):
> def __init__(self):
> self.ctx = cl.create_some_context()
> self.queue = cl.CommandQueue(self.ctx)
> self.prg = cl.Program(self.ctx, """
> __kernel void sum(__global const float *a_g, __global const float
> *b_g, __global float *res_g) {
> int gid = get_global_id(0);
> res_g[gid] = a_g[gid] + b_g[gid];
> }
> """).build()
> def run_all(self):
> mf = cl.mem_flags
> a_g = cl.Buffer(self.ctx, mf.READ_ONLY | mf.COPY_HOST_PTR,
> hostbuf=a_np)
> b_g = cl.Buffer(self.ctx, mf.READ_ONLY | mf.COPY_HOST_PTR,
> hostbuf=b_np)
> res_g = cl.Buffer(self.ctx, mf.WRITE_ONLY, a_np.nbytes)
> sum_k = self.prg.sum
> sum_k.set_args(a_g, b_g, res_g)
> cl.enqueue_nd_range_kernel(self.queue, sum_k, a_np.shape, None)
> def run_set_args(self):
> mf = cl.mem_flags
> a_g = cl.Buffer(self.ctx, mf.READ_ONLY | mf.COPY_HOST_PTR,
> hostbuf=a_np)
> b_g = cl.Buffer(self.ctx, mf.READ_ONLY | mf.COPY_HOST_PTR,
> hostbuf=b_np)
> res_g = cl.Buffer(self.ctx, mf.WRITE_ONLY, a_np.nbytes)
> self.sum_k = self.prg.sum
> self.sum_k.set_args(a_g, b_g, res_g)
>
> def run_enqueue(self):
> cl.enqueue_nd_range_kernel(self.queue, self.sum_k, a_np.shape,
> None)
> o = Test()
> # runs fine
> o.run_all()
> # run separately gives "clEnqueueNDRangeKernel failed: invalid mem object"
> o.run_set_args()
> o.run_enqueue()
Thanks
Blair
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