Package: python-pyopencl
Version: 2015.2.4-1
Severity: important
Dear Maintainer,
copying a host buffer to a 2D device image will fail. The
problem can be reproduced by the minimal example below.
A further code example will be shown that does not throw
an error yet still won't actually copy.
The problem seems to be related to the recent switch of pyopencl
from boost to cffi and can be fixed by upgrading to the latest
upstream release of pyopencl (verfied by "pip install pyopencl")
The problem also affects python3-pyopencl and is as well solved
by using the latest pyopencl release through pip3.
This might also solve bug #819448.
kind regards,
Jonas
### CODE EXAMPLE: ###
from numpy import zeros, ones_like, float32
import pyopencl as cl
mf = cl.mem_flags
host_buffer = zeros((128, 128), dtype=float32)
device_image = cl.Image(ctx, mf.READ_WRITE,
cl.ImageFormat(cl.channel_order.INTENSITY,
cl.channel_type.FLOAT),
shape=(128, 128))
cl.enqueue_copy(que, device_image, host_buffer, origin=(0, 0), region=(128,
128))
---------------------------------------------------------------------------
LogicError Traceback (most recent call last)
<ipython-input-11-075d353c4950> in <module>()
----> 1 cl.enqueue_copy(que, imageD, imageH, origin=(0, 0), region=(512, 256))
/usr/lib/python2.7/dist-packages/pyopencl/__init__.pyc in enqueue_copy(queue,
dest, src, **kwargs)
1526
1527 return _cl._enqueue_write_image(
-> 1528 queue, dest, origin, region, src, **kwargs)
1529 else:
1530 raise ValueError("invalid dest mem object type")
/usr/lib/python2.7/dist-packages/pyopencl/cffi_cl.pyc in
_enqueue_write_image(queue, mem, origin, region, hostbuf, row_pitch,
slice_pitch, wait_for, is_blocking)
1515 _event, queue.ptr, mem.ptr, origin, origin_l, region, region_l,
1516 c_buf, row_pitch, slice_pitch, c_wait_for, num_wait_for,
-> 1517 bool(is_blocking), NannyEvent._handle(hostbuf, c_ref)))
1518 return NannyEvent._create(_event[0])
1519
/usr/lib/python2.7/dist-packages/pyopencl/cffi_cl.pyc in _handle_error(error)
547 _lib.free_pointer(error.msg)
548 _lib.free_pointer(error)
--> 549 raise e
550
551 # }}}
LogicError: clenqueuereadimage failed: INVALID_VALUE
by adding a third dimension to origin and region, the command will execute
without error:
cl.enqueue_copy(que, device_image, host_buffer, origin=(0, 0, 0), region=(128,
128, 1))
yet no data will be actually copied, which can be verfied by attempting to copy
the data
back from the device to the host:
host_buffer_2 = ones_like(host_buffer)
cl.enqueue_copy(que, host_buffer_2, device_image, origin=(0, 0, 0),
region=(128, 128, 1))
host_buffer_2 should now have equal contents as host_buffer, yet it doesn't.
-- System Information:
Debian Release: stretch/sid
APT prefers testing
APT policy: (500, 'testing'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.5.0-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)
Versions of packages python-pyopencl depends on:
ii amd-opencl-icd [opencl-icd] 1:15.9-4~deb8u2
ii libc6 2.22-9
ii libgcc1 1:6.1.1-4
ii libstdc++6 6.1.1-4
ii nvidia-opencl-icd [opencl-icd] 352.79-7
ii ocl-icd-libopencl1 [libopencl1] 2.2.9-1
ii pocl-opencl-icd [opencl-icd] 0.12-2
ii python 2.7.11-1
ii python-appdirs 1.4.0-2
ii python-cffi 1.6.0-1
pn python-cffi-backend-api-9729 <none>
ii python-decorator 4.0.6-1
ii python-numpy [python-numpy-abi9] 1:1.11.0-1
ii python-pkg-resources 20.10.1-1
ii python-pytools 2016.1-1
ii python-six 1.10.0-3
pn python:any <none>
Versions of packages python-pyopencl recommends:
ii python-mako 1.0.4+ds1-1
ii python-opengl 3.1.0+dfsg-1
ii python-pyopencl-doc 2015.2.4-1
Versions of packages python-pyopencl suggests:
pn python-imaging-tk <none>
ii python-matplotlib 1.5.1-1+b2
pn python-pyopencl-dbg <none>
pn python-pytest <none>
-- no debconf information
