Hi,
Am 09.09.2016 um 17:25 schrieb Aurélien PIERRE:
since Ubuntu 16.04, the processing and exporting with OpenCL felt much
slower than before.
[...]
Any clues ?
Not really. However, one thing is obvious:
[opencl_profiling] spent 124,9889 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 35,1145 seconds in [Read Image (from device to
host)]
All time is lost while transferring data between host memory and GPU
memory. That step is known to be timing critical but in your case it's
agonizingly slow.
No idea what causes this slowdown. Knowing that you changed your system
I'd suspect the driver to be the culprit.
Ulrich
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